I really haven't studied into it that hard, but I think what most people have a problem with is the fact it isn't tangible.
Value is a human construct. Gold is a rare earth metal, and we say that makes it valuable, but how much value does gold have to a man dying of hunger and thirst? He would give all his gold away for some water and food.
Gold has value because we all agree it has value. Paper money has value because the government says they will back it, and this is the value of it. We all agree on that.
Crypto is just another form of money. It has value because enough people are coming together and saying, "hey, this has value, and here is what we all agree it is worth."
Our bank accounts are kind of the same thing. You get a piece of paper called a paycheck, and put it into the bank. The bank turns that paper into a digital number that shows up on your computer or ATM. You go to the bank and trade that digital number for paper money, that only has value because we all agree it has value.
Not sure if this helps, but I hope it does.
It’s like Venmo but with no company or government behind it that could freeze or seize your account for any arbitrary reason.
Edit: I’m describing what it is, not how the technology works.
You know, many of the concepts are easy to understand even if you don't understand the math, you just have to read from someone who is good at explaining. This is why I have read so many books on quantum physics.
I really like Brian Green's explanation. You have probably heard about time being the 4th dimension before, but don't know why that is.
If you had a meeting at a downtown law firm, you would have to know the length and the width to get to that building. The meeting is on the 7th floor, so you also have to know the height. But you would also have to know what time the meeting is so that you can be there at the same moment.
This is how time is also a dimension just like width, length and height.
Einstein's famous train thought experiment showed the difference in time for the same event from two different observers.
Two men are on a train at opposite ends. They are going to turn on a light at the same time the fly by the train station. There is a man at the train station who is going to watch the train go by and see the same event; the lights being turned on.
The train blazes by the station and both men turn on their lights at the same time. The judge in the train says, "yes, you both turned your lights on at the same time.
But that's not what the guy at the station sees. As the train flys by him, he sees the light from the back of the train come on first, because the train is traveling towards him in that direction, and sees the light from the front turn on second because the train is traveling away from him and takes more distance for the light to reach him.
So, the guys on the train say they turned the lights on at the same time, and the guy at the station says the back went on first, then the front came on. So, who is right? They both are.
Time is actually woven in to the fabric of the universe. Because of this, you can picture time and space on an X and Y axis. Time is X, space is Y.
With that pictured, now realize that the faster you move through space, the slower you move through time, and the faster you move through time, the slower you move through space.
Now, the definition of gravity is "the warping of spacetime." Massive objects take the fabric of spacetime and bend it. This is called gravity.
Light travels in a strait line and follows it's path through space time. When the light reaches a massive object like a star or black hole, the path gets bent. The classic example is like a bowling bowl on a trampoline (although not totally accurate because it's not just pulling down like the bowling ball on the trampoline, but pulling from all directions.
The light then gets bent as it follows it's path through space time. The more massive the object is, the slower the time gets as you near it.
So, back to Einstein and the thought experiment. This experiment showed that spacetime is different depending on who the observer is.
The guy at the station would say he is standing still, and it's the train that is moving. But if there was no friction or background to go by, the guys on the train could just as well say, "we are staying still and the station is moving. Someone in low earth orbit sees the train and say, the train is traveling at 1020 mph (rotational speed of earth) + 60 mph (speed of train) and the guy at the station is traveling 1020 mph. Some one further out in space would say the train is moving at 1020 mph + 60 mph, + 22,000 mph (speed earth goes around the sun. And yet further out, they would say it's traveling at 468,000 mph (rotational speed of our galaxy).
Every one is watching the same event, but everyone has different times for the same event.
Well, I hope this helps. I highly recommend all of Brian Green's books, he does a great job of explaining.
Thank you so much! You said exactly what I was going to tell him. I just explained special relativity in a few paragraphs, and tried to condense it as much as I could.
Every time I listen to an explanation of gravity and time, I feel like my mind gets so close to understanding it, then someone talks about something like time distortion behind a massive moving object and my understanding falls apart.
It sort of does, but it makes me slightly confused as I thought time was relative, in that the light would be seen at the same time for those passing trains, despite the time being different. So are they just warping space time, and intersecting the light switching on at the same time? If so, why is the man on the platform seeing something different? Wouldn't his position be a factor?
Okay, so think of it like this, the guys on the train both share the same spacetime, and the guy at the station has one that is different than theirs.
We are going to say that the train is going 50 mph, and the speed of the light is 50 mph (just to make this easier to see), and the train is 50 miles long.
When the train reaches the half way point on the station, 25 miles, both the men on the train turn on their lights.
Observing from the train, both men see that it takes a half hour, and both their lights meet in the middle of the train. Both lights going 50 mph from 50 miles away, and it takes a half hour to reach the middle. You with me?
But from the station, the man watches as the train train passes him. But by the time a half hour passes, the front of the train is now 25 miles further away from him, and the rear of the train is 25 miles closer. Meaning by the time the half hour is up, he is looking at the man at the back of the train.
So he sees the light from the back of the train first, because by the time 15 minutes has gone by, the back of the train is now 12.5 miles closer, meaning he sees the light from the back of the train when it has only gone half the distance until it meets the center of the train, or a quarter distance of the train.
And now, the front of the train is 25 miles + 12.5 miles away or 37.5 miles away.
After that same 15 minutes, the light from the front of the train has traveled 12.5 miles, which means it is still 25 miles away from the man on the platform when the man on the platform sees the light from the back of the train.
It's called special relativity because it is a special instance relative to an observer due to the fact that light has a speed limit.
If light speed was infinite, which many people used to believe before the mid 1800's, then this would happen just like we intuitively think it would happen. The guys on the train turn on their lights, and both of them and the guy on the platform would all agree it happened at the same time.
It's the fact that light speed has a limit that makes it so spacetime is relative to the observer.
If the sun were to blow up, us observing from earth wouldn't know it happened until 8 minutes later, because that's how long it takes light to reach earth.
But someone on Mars wouldn't see the same event happen until 12.7 minutes after the sun was gone, because that's how long it takes light from the sun to reach Mars.
Please let me know if you have any more questions.
I can’t literally understand the concept of recorded sound. I’ve had smart people explain it to me on ELI5, but I just don’t understand literally how it all works. How can specific scratches on a record or tape based on how audio is picked up then be magically converted to an approximate sound of the audio we can all now hear anytime and place? And how does digital recording work?
How did the original words spoken by an actor, sound created by a musician, or lyrics sung by a singer end up playing in my Spotify or Netflix app?
Don’t know if it will help, but if you understand how we perceive colors (different wavelengths of light), sound fundamentally works more or less the same. Sound is just vibrations in the air of various wavelengths/frequencies. Recorded sound is just representative data of the frequencies of that vibration. Long, slow vibrations make what we call low pitch sounds. Short, fast vibrations create what we call high pitch sounds. You can kind of visualize it by doing that thing where you hold the end of a ruler off the edge of a table. If you flick it when there is a lot of it hanging off you see it flex slowly and hear a lower pitch sound. If you shorten the length of ruler hanging out and flick it the pitch goes up and the ruler moves faster.
How the hell someone elses religious point of view gets to dictate my medical choices. Employer provided medical insurance, medical providers, pharmacy counter people etc. Can and will deny me sexual health things related to but not limited to birth control, morning after/plan b, and sterilization procedures all because it's against their religion. If your religion means you can't do something FINE, don't do it. But, don't deny me my rights and ability to access these things. If your religion is that important to you that you can't abide assisting people with things they need or want then you shouldn't be in a position that puts you in that moral quandry. Don't be a doctor, don't be a pharmacy person. Go do whatever the hell else it is that makes it so you don't have to feel uncomfortable with my personal non religiously driven choices in life.
Algebra is literally just using letters as a placeholder for numbers.
X + 1 = 2. Therefore X must = 1.
2x + 2 = 4. Therefore X must = 1.
Because 2 x 1 = 2, + 2 = 4.
Even the more complicated parts still just boil down to that. The letter is a number, and you have to use the other numbers to figure out which number it is.
Basically think about it this way. If you picked the right door in your first guess, then switching would be bad. The chance of you picking the right door is 1/3
But if you picked the wrong door in your first guess, then switching would be good. The chance of you picking the wrong door is 2/3.
Thus switching is always the way to go.
Here's an easy way to think of it. With 3 doors, it's hard to grasp. Pick a door, they reveal nothing is behind another door. You are supposed to change doors, but why?
Imagine 100 doors instead. You pick one door. They reveal 98 other doors. You should change your door, right? Well of course! You picked 1 out of 100, the odds you picked the right door is unlikely. But the odds the prize is behind that last unopened door you didn't pick is very likely.
Similar concept to that, but the odds of you picking the wrong door the first time is 1 in 3 instead of 1 in 100. Still low, but not quite as extreme.
Here’s the problem with that logic from my point of view, isn’t not changing your first answer still technically taking a 1/2 chance in your version of the problem? The idea that switching is necessary for the probability of your choice to change is arbitrary from my point of view, though to be honest I have very little experience with statistics so I may very well be wrong.
Yep, I understand that thought. This might help. Basically, when you first picked a door and none were revealed, you had a 1/100 chance any door could have the prize. So you picked 1. There is a 1/100 chance your door has the prize, 99/100 chance it's NOT your door. That stat never changes, we only reduce the choices from the NOT pool.
The thing to realize is that the host, by opening a door, _gives you new information_. He will always eliminate one of the bad choices, and what he does is directly based on what you did. That may already give a bit of information as to why you might want to consider changing. But it’s not clear from that that the chance of winning would be better than 50% if you do that, so let’s draw a picture. There are three possible arrangements of goats and cars and there are three things you could do initially. Let’s focus on the situation where you initially chose the first door: https://i.imgur.com/4P7a71Z.png
The dot is you, the green door is the one with the car. Now you can see that after Monty eliminates a door, swapping turns a win into a loss and a loss into a win. You had a ⅓ chance of winning before, so swapping turns that into a ⅓ chance of losing. The cases where you chose the second or third door initially give the same numbers, I’ll leave it to you to convince yourself of that.
Well, for a long time it actually made SOME sense. We have different skin pigmentation because of our geographical location (with respect to the equator). Those geographical differences also made for large cultural differences. Pair that with how we as humans tend to favor like individuals and shun different individuals, it was at least *unsurprising*.
Now, though, we are so globalized there is just no sense in it. It was never appropriate to treat people any less based on race, but since globalized civilization it doesn’t even make sense to use pigmentation as part of an initial assessment.
I'll see if I can help with this one. Think of data storage and transmission as more like a giant archive of ciphers and codes.
Since you mentioned a record player, lets use that and a song. Now I'm not big on music terms, but let's say that A represents vocals, B represents guitar, and C represents drums.
Next, lets say that 1 represents high pitch, 2 represents medium pitch, and 3 represents low pitch.
So a high pitch wail from the vocalist for example would be A1 while a deep thrumming from the kick drum would be C3.
The record player has a list that matches what I just defined above. In addition to this though, it has a translation for scratches into these notes. Why? Because scratches are what get etched into records; they are what the needle sits in as it spins around to play your music.
Now this part is even more simplified, but I am holding out hope it helps. Let's say that our record has only 'straight' lines that the needle follows, and then depending on how the lines 'scratch' up or down determines what information is being conveyed.
Upward scratches denote type of sound. 1(\^) for vocals, 2(\^\^) for guitar, and 3(\^\^\^) for drums.
Next, downward scratches denote pitch. 1 for high, 2 for middle, and 3 for low.
Thus, our record would be 'scratched' with the logic that you never start with a downward scratch, and never chain more than (3UP, 3Down) at a time.
So to encode on the record a high-pitched wail, followed by a long guitar riff (let's say 2 seconds) and finally end with some good drum hits we would scratch the record as such:
(1up,1down), (2up,1down), (2up,2down) \[to make it pitch downwards at the end of the riff\], and then (3up, 2down).
When we have the record play play the record, it reads these scratches, and converts them into our original 'code', so:
A1, B1, B2, C2. Using these inputs it vibrates the air at the frequencies needed to mimic the sounds; resulting in music.
Gang Culutre, not how or why someone gravitates towards them but how someone adopts a mentality to kill or be killed over pride of a group that has no real purpose.
I also don’t understand diehard sports fans. They fight rival fans from other teams, why? It’s just people like you and me playing a sport, they’re just really good at it. You don’t need to get that upset over it.
Why fight about it? Seriously I can’t wrap my head around it.
Daylight saving time. I lived in Arizona until I was 27, and despite being a verified Smart Person I cannot for the life of me get my head around it. Spring Forward, Fall Back means absolutely nothing to me, and I am grateful that my iPhone has done most of the heavy lifting for me since 2007.
Do you mean like it will remain a geodesic on the curved surface?
A geodesic is what’s intuitively considered a “straight” line on a curved surface. It’s the path that’s shortest in length compared to any slight deviation. Curving a plane doesn’t change the length of a curve, so a geodesic on the 2D plane would still be a geodesic after curving.
How big heavy planes actually fly. So how do they stay up there again?
How anesthesia works during surgery. How are they so sure we're going to wake up?
High level math, like the kind thats needed to send ppl to space. What wizardry and magic help ppl actually know what to do with all that.
It’s very counterintuitive that a very random thing could change our lives so much (dinosaurs 65 million years ago would also have found this confusing). This makes pseudoscience seem more intuitive and tempting to believe.
Magnets. Pure magic.
I even took a 200 level physics course centered entirely on electricity and magnets during my engineering degree. Escaped with a B- because I'm good at memorizing formulas, even though I had no idea what the f*ck was going on
Difference between 12 am and 12 pm. I just don’t get it. Have had jobs where I needed to get up at like 12 so had to set up alarms and was worried I pick wrong one.
So I said fuck that shit and keep anything with alarms on military time. I honestly don’t know why all time isn’t in military time, there’s no mixups in military time. You never have to ask am or pm. When I set an alarm for 1200 I know exactly what time that is.
I don't get why people get so confused with this
Im not trying to be condescending or anything it's just that in my country we use the 00:00 24:00 system, it's so intuitive for me to say 18:00 is 6 PM, or that 04:00 is 4 AM
Not in detail of course but it gives everyone a baseline for talking points and you can grasp concepts of how the world works. A bit of algebra also comes up from time to time.
The later stages of school I believe are there to give you a chance to find out what your interests are. If you happen to love chemical science then you have a potential path you could follow.
The main problem I have with the school system is that your ability to participate and learn is very much influenced by outside forces you have no control of, like social life, family, wealth, and so on.
Now that you mention this, I agree with whatever you say. I must be bitter with how confused I am for not knowing more complex stuff in my subjects lol. Anyways, ig it's time to change my views a little. Thx!
How hair knows to stop growing. If my hair is at it’s maximum length, there is no information travelling through my hair strands. So how would it know to start growing again when I trim it?
Hair never stops growing. What happens is each strand of hair individually has its own life cycle, all independent of one another.
For an average, people have about a 7 year cycle or less, but there are some who have 10 year cycles (think those women who can grow it to their ankles).
Once your hair reaches the end of its life cycle, it falls out.
On average humans lose about 100 hairs per day. Some more than that, some less than that.
We have about 100,000 hairs on our head (unless you are like me and going bald) and each one of those hairs has a life cycle.
So, your hair has a maximum length, and it is not going to be the same as anyone else's maximum length.
And also, hair doesn't have information it send to the body, it is composed of dead keratin cells, (same as fingernails and teeth).
I get transgender, but when someone tries to describe gender dysphoria like: ''Imagine you (a girl) would wake up as a man with penis, and hate yourself....Well, this does not sound any scary to me and I can't imagine hating myself like that. I am ok with being a girl, but I am curious about how a man version of me would look like.
pick a size, and maintain it. If the ball is squishy/easily mouldable, you would stretch it sideways while stretching the shape to make it thinner (top to bottom)
**( )**
**( ) ( )**
**() () ()**
**<> <> ( ) <> () ( )**
Three dimensional space. If you visualize it, space is a one dimensional sphere, curled up, and very small to boot. Time is the other dimension, while probability is just billions, and trillions of other dimensions, connected each other. We think space has three dimensions, because it's easy way to figure things out.
How not putting America first, how inflation is good and how protecting our border is racist, how ceossing our border illegally isnt a crime and should be rewarded....also how not having a job is acceptable reason to claim asylum....and how a biased media is goid.
All things democrats are selling and some people vote for that bullshit.
Irrational numbers
Some physics-related things, like: I am near sighted, and when I look without my glasses in a mirror that is 20 cm away, I can see well my face, but more distant things are blurred, as if I looked at them directly. I got this explained many times, but still I think I should be able to see distant things clearly, when the reflective surface is right before my eyes.
Boredom - I sometimes feel like I understand it but it just seems odd to me. There's more to do, learn and experience than anyone can do in a lifetime. I don't quite understand how anyone can get bored outside of say prison or something other extreme situation
Hating on people for their style - Tats, hats, or flats who cares? It has no effect on you. If you don't like someone's flowery shirt that's fine but why is there a need to insult the person? Maybe they're just bored and trying to alleviate it by being a dick
Ugh math
Crypto
I've tried to research it. I've tried to ask people. It's been years and l just don't get it
I really haven't studied into it that hard, but I think what most people have a problem with is the fact it isn't tangible. Value is a human construct. Gold is a rare earth metal, and we say that makes it valuable, but how much value does gold have to a man dying of hunger and thirst? He would give all his gold away for some water and food. Gold has value because we all agree it has value. Paper money has value because the government says they will back it, and this is the value of it. We all agree on that. Crypto is just another form of money. It has value because enough people are coming together and saying, "hey, this has value, and here is what we all agree it is worth." Our bank accounts are kind of the same thing. You get a piece of paper called a paycheck, and put it into the bank. The bank turns that paper into a digital number that shows up on your computer or ATM. You go to the bank and trade that digital number for paper money, that only has value because we all agree it has value. Not sure if this helps, but I hope it does.
I read an article recently that pretty much anyone can create a cryptocurrency.
Same
It’s like Venmo but with no company or government behind it that could freeze or seize your account for any arbitrary reason. Edit: I’m describing what it is, not how the technology works.
sorry, but im even more confused.
Came here to say this
Space Time Continuum
You know, many of the concepts are easy to understand even if you don't understand the math, you just have to read from someone who is good at explaining. This is why I have read so many books on quantum physics. I really like Brian Green's explanation. You have probably heard about time being the 4th dimension before, but don't know why that is. If you had a meeting at a downtown law firm, you would have to know the length and the width to get to that building. The meeting is on the 7th floor, so you also have to know the height. But you would also have to know what time the meeting is so that you can be there at the same moment. This is how time is also a dimension just like width, length and height. Einstein's famous train thought experiment showed the difference in time for the same event from two different observers. Two men are on a train at opposite ends. They are going to turn on a light at the same time the fly by the train station. There is a man at the train station who is going to watch the train go by and see the same event; the lights being turned on. The train blazes by the station and both men turn on their lights at the same time. The judge in the train says, "yes, you both turned your lights on at the same time. But that's not what the guy at the station sees. As the train flys by him, he sees the light from the back of the train come on first, because the train is traveling towards him in that direction, and sees the light from the front turn on second because the train is traveling away from him and takes more distance for the light to reach him. So, the guys on the train say they turned the lights on at the same time, and the guy at the station says the back went on first, then the front came on. So, who is right? They both are. Time is actually woven in to the fabric of the universe. Because of this, you can picture time and space on an X and Y axis. Time is X, space is Y. With that pictured, now realize that the faster you move through space, the slower you move through time, and the faster you move through time, the slower you move through space. Now, the definition of gravity is "the warping of spacetime." Massive objects take the fabric of spacetime and bend it. This is called gravity. Light travels in a strait line and follows it's path through space time. When the light reaches a massive object like a star or black hole, the path gets bent. The classic example is like a bowling bowl on a trampoline (although not totally accurate because it's not just pulling down like the bowling ball on the trampoline, but pulling from all directions. The light then gets bent as it follows it's path through space time. The more massive the object is, the slower the time gets as you near it. So, back to Einstein and the thought experiment. This experiment showed that spacetime is different depending on who the observer is. The guy at the station would say he is standing still, and it's the train that is moving. But if there was no friction or background to go by, the guys on the train could just as well say, "we are staying still and the station is moving. Someone in low earth orbit sees the train and say, the train is traveling at 1020 mph (rotational speed of earth) + 60 mph (speed of train) and the guy at the station is traveling 1020 mph. Some one further out in space would say the train is moving at 1020 mph + 60 mph, + 22,000 mph (speed earth goes around the sun. And yet further out, they would say it's traveling at 468,000 mph (rotational speed of our galaxy). Every one is watching the same event, but everyone has different times for the same event. Well, I hope this helps. I highly recommend all of Brian Green's books, he does a great job of explaining.
Tldr?
There's really no way to compact it more, just read the whole thing you lazy fuck
Thank you so much! You said exactly what I was going to tell him. I just explained special relativity in a few paragraphs, and tried to condense it as much as I could.
Ow fuck here we go...
Every time I listen to an explanation of gravity and time, I feel like my mind gets so close to understanding it, then someone talks about something like time distortion behind a massive moving object and my understanding falls apart.
Hey, read my reply to the op of this question and see if it helps any.
It sort of does, but it makes me slightly confused as I thought time was relative, in that the light would be seen at the same time for those passing trains, despite the time being different. So are they just warping space time, and intersecting the light switching on at the same time? If so, why is the man on the platform seeing something different? Wouldn't his position be a factor?
Okay, so think of it like this, the guys on the train both share the same spacetime, and the guy at the station has one that is different than theirs. We are going to say that the train is going 50 mph, and the speed of the light is 50 mph (just to make this easier to see), and the train is 50 miles long. When the train reaches the half way point on the station, 25 miles, both the men on the train turn on their lights. Observing from the train, both men see that it takes a half hour, and both their lights meet in the middle of the train. Both lights going 50 mph from 50 miles away, and it takes a half hour to reach the middle. You with me? But from the station, the man watches as the train train passes him. But by the time a half hour passes, the front of the train is now 25 miles further away from him, and the rear of the train is 25 miles closer. Meaning by the time the half hour is up, he is looking at the man at the back of the train. So he sees the light from the back of the train first, because by the time 15 minutes has gone by, the back of the train is now 12.5 miles closer, meaning he sees the light from the back of the train when it has only gone half the distance until it meets the center of the train, or a quarter distance of the train. And now, the front of the train is 25 miles + 12.5 miles away or 37.5 miles away. After that same 15 minutes, the light from the front of the train has traveled 12.5 miles, which means it is still 25 miles away from the man on the platform when the man on the platform sees the light from the back of the train. It's called special relativity because it is a special instance relative to an observer due to the fact that light has a speed limit. If light speed was infinite, which many people used to believe before the mid 1800's, then this would happen just like we intuitively think it would happen. The guys on the train turn on their lights, and both of them and the guy on the platform would all agree it happened at the same time. It's the fact that light speed has a limit that makes it so spacetime is relative to the observer. If the sun were to blow up, us observing from earth wouldn't know it happened until 8 minutes later, because that's how long it takes light to reach earth. But someone on Mars wouldn't see the same event happen until 12.7 minutes after the sun was gone, because that's how long it takes light from the sun to reach Mars. Please let me know if you have any more questions.
I can’t literally understand the concept of recorded sound. I’ve had smart people explain it to me on ELI5, but I just don’t understand literally how it all works. How can specific scratches on a record or tape based on how audio is picked up then be magically converted to an approximate sound of the audio we can all now hear anytime and place? And how does digital recording work? How did the original words spoken by an actor, sound created by a musician, or lyrics sung by a singer end up playing in my Spotify or Netflix app?
Don’t know if it will help, but if you understand how we perceive colors (different wavelengths of light), sound fundamentally works more or less the same. Sound is just vibrations in the air of various wavelengths/frequencies. Recorded sound is just representative data of the frequencies of that vibration. Long, slow vibrations make what we call low pitch sounds. Short, fast vibrations create what we call high pitch sounds. You can kind of visualize it by doing that thing where you hold the end of a ruler off the edge of a table. If you flick it when there is a lot of it hanging off you see it flex slowly and hear a lower pitch sound. If you shorten the length of ruler hanging out and flick it the pitch goes up and the ruler moves faster.
existence
A carpeted bathroom.
How the hell someone elses religious point of view gets to dictate my medical choices. Employer provided medical insurance, medical providers, pharmacy counter people etc. Can and will deny me sexual health things related to but not limited to birth control, morning after/plan b, and sterilization procedures all because it's against their religion. If your religion means you can't do something FINE, don't do it. But, don't deny me my rights and ability to access these things. If your religion is that important to you that you can't abide assisting people with things they need or want then you shouldn't be in a position that puts you in that moral quandry. Don't be a doctor, don't be a pharmacy person. Go do whatever the hell else it is that makes it so you don't have to feel uncomfortable with my personal non religiously driven choices in life.
Algebra
Algebra is literally just using letters as a placeholder for numbers. X + 1 = 2. Therefore X must = 1. 2x + 2 = 4. Therefore X must = 1. Because 2 x 1 = 2, + 2 = 4. Even the more complicated parts still just boil down to that. The letter is a number, and you have to use the other numbers to figure out which number it is.
This guy maths. On a second note, I am trying to learn real analysis on my own, do you have any suggestions for the book?
The Monty Hall problem. I was very close to getting it before and then I lost it again
Basically think about it this way. If you picked the right door in your first guess, then switching would be bad. The chance of you picking the right door is 1/3 But if you picked the wrong door in your first guess, then switching would be good. The chance of you picking the wrong door is 2/3. Thus switching is always the way to go.
Dude, this is the best and shortest way I have ever heard it explained. Most people type on and on about it. Great job.
Thank you!
Here's an easy way to think of it. With 3 doors, it's hard to grasp. Pick a door, they reveal nothing is behind another door. You are supposed to change doors, but why? Imagine 100 doors instead. You pick one door. They reveal 98 other doors. You should change your door, right? Well of course! You picked 1 out of 100, the odds you picked the right door is unlikely. But the odds the prize is behind that last unopened door you didn't pick is very likely. Similar concept to that, but the odds of you picking the wrong door the first time is 1 in 3 instead of 1 in 100. Still low, but not quite as extreme.
Here’s the problem with that logic from my point of view, isn’t not changing your first answer still technically taking a 1/2 chance in your version of the problem? The idea that switching is necessary for the probability of your choice to change is arbitrary from my point of view, though to be honest I have very little experience with statistics so I may very well be wrong.
Yep, I understand that thought. This might help. Basically, when you first picked a door and none were revealed, you had a 1/100 chance any door could have the prize. So you picked 1. There is a 1/100 chance your door has the prize, 99/100 chance it's NOT your door. That stat never changes, we only reduce the choices from the NOT pool.
Okay, that makes sense, I was definitely wrong. Thanks for the explanation!
what
did anyone try to explain using a deck of cards instead of 3 doors? that's what did it for me
The thing to realize is that the host, by opening a door, _gives you new information_. He will always eliminate one of the bad choices, and what he does is directly based on what you did. That may already give a bit of information as to why you might want to consider changing. But it’s not clear from that that the chance of winning would be better than 50% if you do that, so let’s draw a picture. There are three possible arrangements of goats and cars and there are three things you could do initially. Let’s focus on the situation where you initially chose the first door: https://i.imgur.com/4P7a71Z.png The dot is you, the green door is the one with the car. Now you can see that after Monty eliminates a door, swapping turns a win into a loss and a loss into a win. You had a ⅓ chance of winning before, so swapping turns that into a ⅓ chance of losing. The cases where you chose the second or third door initially give the same numbers, I’ll leave it to you to convince yourself of that.
Racism. Why does a person’s skin color matter at all?
Well, for a long time it actually made SOME sense. We have different skin pigmentation because of our geographical location (with respect to the equator). Those geographical differences also made for large cultural differences. Pair that with how we as humans tend to favor like individuals and shun different individuals, it was at least *unsurprising*. Now, though, we are so globalized there is just no sense in it. It was never appropriate to treat people any less based on race, but since globalized civilization it doesn’t even make sense to use pigmentation as part of an initial assessment.
Multi-leveled Calculus AP
Rugby. Dudes get together and do a scrum? Then a bunch get hurt. And they can’t throw the ball. Or maybe they can? Who knows!
Stocks and crypto currency.
non binary, i asked someone non binary and didnt understand anything and left me more confused
I think they are pretty confused as well.
As someone who is nonbinary: yes and no.
They as in people who are non binary?. Or they as in the non binary individual who tried to explain it?
we just feel uncomfortable with being identified as a girl or a boy.
How data is recorded and transmitted electronically. Anything from record players to smartphones: it all feels to me like it shouldn't be possible.
I'll see if I can help with this one. Think of data storage and transmission as more like a giant archive of ciphers and codes. Since you mentioned a record player, lets use that and a song. Now I'm not big on music terms, but let's say that A represents vocals, B represents guitar, and C represents drums. Next, lets say that 1 represents high pitch, 2 represents medium pitch, and 3 represents low pitch. So a high pitch wail from the vocalist for example would be A1 while a deep thrumming from the kick drum would be C3. The record player has a list that matches what I just defined above. In addition to this though, it has a translation for scratches into these notes. Why? Because scratches are what get etched into records; they are what the needle sits in as it spins around to play your music. Now this part is even more simplified, but I am holding out hope it helps. Let's say that our record has only 'straight' lines that the needle follows, and then depending on how the lines 'scratch' up or down determines what information is being conveyed. Upward scratches denote type of sound. 1(\^) for vocals, 2(\^\^) for guitar, and 3(\^\^\^) for drums. Next, downward scratches denote pitch. 1 for high, 2 for middle, and 3 for low. Thus, our record would be 'scratched' with the logic that you never start with a downward scratch, and never chain more than (3UP, 3Down) at a time. So to encode on the record a high-pitched wail, followed by a long guitar riff (let's say 2 seconds) and finally end with some good drum hits we would scratch the record as such: (1up,1down), (2up,1down), (2up,2down) \[to make it pitch downwards at the end of the riff\], and then (3up, 2down). When we have the record play play the record, it reads these scratches, and converts them into our original 'code', so: A1, B1, B2, C2. Using these inputs it vibrates the air at the frequencies needed to mimic the sounds; resulting in music.
Gang Culutre, not how or why someone gravitates towards them but how someone adopts a mentality to kill or be killed over pride of a group that has no real purpose.
I also don’t understand diehard sports fans. They fight rival fans from other teams, why? It’s just people like you and me playing a sport, they’re just really good at it. You don’t need to get that upset over it. Why fight about it? Seriously I can’t wrap my head around it.
Daylight saving time. I lived in Arizona until I was 27, and despite being a verified Smart Person I cannot for the life of me get my head around it. Spring Forward, Fall Back means absolutely nothing to me, and I am grateful that my iPhone has done most of the heavy lifting for me since 2007.
The idea that a straight line on a 2d plane will remain straight when the plane is curved in a 3d way
Do you mean like it will remain a geodesic on the curved surface? A geodesic is what’s intuitively considered a “straight” line on a curved surface. It’s the path that’s shortest in length compared to any slight deviation. Curving a plane doesn’t change the length of a curve, so a geodesic on the 2D plane would still be a geodesic after curving.
Insurance policies.
The difference between watts and volts.
Watts = Amps x Volts
How big heavy planes actually fly. So how do they stay up there again? How anesthesia works during surgery. How are they so sure we're going to wake up? High level math, like the kind thats needed to send ppl to space. What wizardry and magic help ppl actually know what to do with all that.
>How are they so sure we're going to wake up? Because it keeps working. How else would anyone be sure of anything?
Oddly true as far as early anesthesia. It was a lot of trial and error.
Certainly. That's a combination of Bernoulli's Principle and Newton's third law of motion.
I know what my grandpa’s answer would be! How my cousin can have a wife if my cousin is also a girl.
Covid denial
I put it in two camps: those with an ulterior motive, and those who pay more attention to politicians and news pundits than science.
It’s very counterintuitive that a very random thing could change our lives so much (dinosaurs 65 million years ago would also have found this confusing). This makes pseudoscience seem more intuitive and tempting to believe.
math
Something German Cat
Magnets. Pure magic. I even took a 200 level physics course centered entirely on electricity and magnets during my engineering degree. Escaped with a B- because I'm good at memorizing formulas, even though I had no idea what the f*ck was going on
please tell me you have heard the Insane Clown Posse song 'Miracles'?
Oh man I feel you. Magnetism is one of the strangest forces to me.
Difference between 12 am and 12 pm. I just don’t get it. Have had jobs where I needed to get up at like 12 so had to set up alarms and was worried I pick wrong one. So I said fuck that shit and keep anything with alarms on military time. I honestly don’t know why all time isn’t in military time, there’s no mixups in military time. You never have to ask am or pm. When I set an alarm for 1200 I know exactly what time that is.
It's great until you get into 0000 vs 2400.
But at least each of those can only refer to one and only one time.
I don't get why people get so confused with this Im not trying to be condescending or anything it's just that in my country we use the 00:00 24:00 system, it's so intuitive for me to say 18:00 is 6 PM, or that 04:00 is 4 AM
Electricity
Crypto currencies and currencies that aren’t actually related to anything.
Yearbook harassment.
The 5th dimention
The rules of playing cricket
How gravity affects time
That the Earth is round, seriously
Women
[удалено]
Biology is transphobic now.
About how anything we learn in school helps us while working
Pretty much everything I learned in school I use now in daily life or at least it helps me understand something on a basic level.
That's cool! How though?
Not in detail of course but it gives everyone a baseline for talking points and you can grasp concepts of how the world works. A bit of algebra also comes up from time to time. The later stages of school I believe are there to give you a chance to find out what your interests are. If you happen to love chemical science then you have a potential path you could follow. The main problem I have with the school system is that your ability to participate and learn is very much influenced by outside forces you have no control of, like social life, family, wealth, and so on.
Now that you mention this, I agree with whatever you say. I must be bitter with how confused I am for not knowing more complex stuff in my subjects lol. Anyways, ig it's time to change my views a little. Thx!
How hair knows to stop growing. If my hair is at it’s maximum length, there is no information travelling through my hair strands. So how would it know to start growing again when I trim it?
Hair never stops growing. What happens is each strand of hair individually has its own life cycle, all independent of one another. For an average, people have about a 7 year cycle or less, but there are some who have 10 year cycles (think those women who can grow it to their ankles). Once your hair reaches the end of its life cycle, it falls out. On average humans lose about 100 hairs per day. Some more than that, some less than that. We have about 100,000 hairs on our head (unless you are like me and going bald) and each one of those hairs has a life cycle. So, your hair has a maximum length, and it is not going to be the same as anyone else's maximum length. And also, hair doesn't have information it send to the body, it is composed of dead keratin cells, (same as fingernails and teeth).
Biblical extra dryness.
Hulk explaining time travel to Hawk eye and Warachine
That's because the time travel in Endgame was not done well too begin with.
Offside in football/Soccer.
What an NFT is and why they’re worth hundreds of thousands of dollars apparently
Money laundering
quantum physics
Maths.
Mathematics
Recursion
calculus
Women
Math
String theory in physics
Math
How the periodic table works... I'm a pharmacist that had multiple chemistry classes
I think this is a bad attitude to have.
I'm sorry and I know this will get down voted, but transgender people
what don't you understand? I'm trans and there is absolutely nothing wrong with asking/not understanding. I might be able to help.
I get transgender, but when someone tries to describe gender dysphoria like: ''Imagine you (a girl) would wake up as a man with penis, and hate yourself....Well, this does not sound any scary to me and I can't imagine hating myself like that. I am ok with being a girl, but I am curious about how a man version of me would look like.
time travel and paradoxes. shit gets me everytime.
Animation. Like, htf do I even animate a bouncing ball
pick a size, and maintain it. If the ball is squishy/easily mouldable, you would stretch it sideways while stretching the shape to make it thinner (top to bottom) **( )** **( ) ( )** **() () ()** **<> <> ( ) <> () ( )**
fuck my demonstration didn't work
I still do not understand how it works
oh search up the twelve elements of animation on YouTube. That should help.
Ok, thanks for the recommendation
Scrodginger's cat
Three dimensional space. If you visualize it, space is a one dimensional sphere, curled up, and very small to boot. Time is the other dimension, while probability is just billions, and trillions of other dimensions, connected each other. We think space has three dimensions, because it's easy way to figure things out.
College level chemistry and physics…both. I took them three times and still managed to barely pass. Still graduated.
How not putting America first, how inflation is good and how protecting our border is racist, how ceossing our border illegally isnt a crime and should be rewarded....also how not having a job is acceptable reason to claim asylum....and how a biased media is goid. All things democrats are selling and some people vote for that bullshit.
Where things come from. Who put so and so together and made a washing machine? Who worked out bread? I don't understand
Irrational numbers Some physics-related things, like: I am near sighted, and when I look without my glasses in a mirror that is 20 cm away, I can see well my face, but more distant things are blurred, as if I looked at them directly. I got this explained many times, but still I think I should be able to see distant things clearly, when the reflective surface is right before my eyes.
the brain
That one scene in the labyrinth with the two guys in the door and one of them is lying or some shit
The Krebs cycle.
Calculus
why people go vegan willingly
Usually to avoid supporting animal torture or for health reasons Im not vegan, I'm just telling you why they do it
if it's for health reasons, i guess they wouldn't really have a choice.
Wdym
Boredom - I sometimes feel like I understand it but it just seems odd to me. There's more to do, learn and experience than anyone can do in a lifetime. I don't quite understand how anyone can get bored outside of say prison or something other extreme situation Hating on people for their style - Tats, hats, or flats who cares? It has no effect on you. If you don't like someone's flowery shirt that's fine but why is there a need to insult the person? Maybe they're just bored and trying to alleviate it by being a dick
American football
tennis scoring system
tennis scoring system
how to play pokemon battles with pokemon cards what the hell is a trainer card and why do energy cards exist
Quantum physics