I have to admit that I didn't know this. But are the tracks "conical" as well? (Is the outer edge of the rail higher than the inner so that there is "full contact" all across the rail between it and the wheel?) They have to, don't they? But this would cause extra friction - so the difference has to be as small as possible. In curves the tracks as a whole are tilted (and thus the train), which keeps the train where it should be (or at least helps to do so), but that's another story. Enlight me!
@episcophagus I run ut of space... I have noticed that the inner side of a rail is rounded, so I thought that this rounding corresonds to an inner "conical" part of the else flat wheel (before the "safety disk") that rests on the else flat track. But if the train goes "astray" the conical part of the wheel will climb up the rounded part of the rail and then slide/steer back.
@AwfulPun Technically the average IQ always stays the same at 100, because its a measurement of the persons IQ relative to the general population. Well at least when the tests are standardised. ;) Just being picky, if you've heard of the flynn effect I know you know that!
Contagious is definitely the best word to describe Feynman's love for Physics. Apart from being an inventor of new concepts, he has also inspired so many others to study Physics, including me.
genius because he fucking invented nukes, repaired radios, designed power plants, discovered new branches of phisics, programmed computers (by punch cards), has an amazing insight into the humand mind, and became an expert in anything he was ever exposed to. god in a field of poor sorry humans
This comment has received too many negative votesshow
Why is he a genius again? Because it took him a professorship to learn what every railway tech knows, or just because he explained it to you and now you think he invented it....?
@ZutaMacka666 no asshole! because he is one of the father of q.e.d and he knew phisics like no other! And also, he was a enthusiast, he passed his knowledge to other like if it was he's greatest times!
@c0nv1ct1337 Yes, if I recall correctly, he was at one point a physics professor at a University. Quite a popular professor too, for obvious reasons. Forget where he taught at, though.
@sbunkboy3 He also ran an informal session called 'Physics X' for many years where students could approach him about any physics topic they liked and he would explain it to them. Apparently they never managed to catch him out (even though they tried!)
@dmora97tt I have just completed an engineering software project which is used for calculating dimensions for the structures that hold the power lines over electrified rails. Holy shit the math and physics are intense. And I had to actually figure some of the stuff out myself. Having been a code monkey for good 10 years, with no exposure to hard phys/math, this was quite an interesting project.
@FizzlNet Now I'm kinda terrified and wonder how in the fuck do the trains run at all in Finland with the deep ground frost that moves all the shitaround several centimeters each year.
I get so pissed when i see a person with a mind like this not ruling the galaxy or some shit. People like this should be the backbone of civilization, not clergymen or politicians.
@thegoonist : It's very slight, but it's there. If you find yourself looking at a train in person, try looking directly at the side of a wheel from some distance. You can see the tread right the way around.
@MCBathtub Tides are the result of the Moon's gravity distorting the space around Earth. Water, being flexible, responds more dramatically than, say, rocks, and moves in a tidal fashion, following the distortion that the Moon's gravity creates. This movement of water creates friction along the Earth's surface and this friction slows down Earth's revolving so that each day is slightly slower than the one before. Over time, it's quite measurable. During the dinosaur era, the day was 18 hours.
@bsodmike Actually, due to the acceleration of rotation affects from Earth's elliptical orbit, it's more like -1.7 milliseconds per century, at this time. Even this, after one billion years results in an increase of 28 minutes. But, note that the Moon was much closer to Earth in the past and, at that time, the affect was much more significant.
im not an engineer, physics expert etc, but i knew that. only cause I've been to the fascinating rail museum in ipswich, qld. and the history behind it is cool, too.
I've been watching aload of these videos out of sheer interest but this one... I had literally no idea thats how trains stayed on the track that's facinating.
@chizhr I didn't say I didn't understand I said I've been watching all these videos. I actually already knew every word he said in everyone I'm a Mechanical Engineering student (but my true passion lies with Physics).
If you read what I said properly you'd see that I said I had no idea thats how trains stayed on the track that part was completely new to me which I found facinating (how its such a simple and elegant solution).
Where did you get "I don't understand this guy" from that?
@insoms Where did you get "You don't understand" from what chizhr said? He just told you how one easily (!) can understand this video. Nevertheless chizhr's post is somekind of useless, since there is no new information included. [...don't take this too serious]
So you are a mech. engineer whose real passion lies in another field (physics)? Why didn't you simply study physics?
@Th0111 My point was I never said I didn't understand the video I understood every word.
And I'm looking into transferring at the moment just theres more job oppourtunities for undergrads in Engineering, Physics you need a phD or have to count on benig able to get an engineering job without an engineering degree.
I love how even though he is a doctor of physics, he is still fascinated by simple things that have been figured out a hundred years ago. I mean, they seem simple now, but he can appreciate just how ingenious the invention is.
The train system was invented hundreds of years ago, by men with paper and pencil. No calculators, no computer simulations, and few of them had education beyond high school.
It seems that as we moved forward, we forget basic principles.
I have $20 in my pocket that says that 95% of the mechanical engineers coming out of school today have no idea how a train stayed on the tracks.
@karozans given that i know a mechanical engineer student in the final year of study who made himself a cab for cheating at an exam that had the definition for mechanical work written on it I think you'll be keeping that 20$.
If they made this programme today, the producers would fill it with animations to illustrate what he's describing and completely RUIN it. Thank you Mr Sykes.
lol, Richard Feyman just taught me how a train stays on its track. thats so awesome. i love this man, i just learned his name for the first time two weeks ago. RIP legend
@rbnchm Electric trains move via magnets that transfer the energy by changing their magnetic state in a way that pulls the train wheels continuously in the direction of the changing magnetic power, sort of like a magnet pulling or pushing a metallic object, but the object is in the shape of a train wheel. Old time locamotives did this by transferring the heat of burning coal to a water vessel where the heated water, steam, would push against a cylinder connected to a rod that pushed the wheels.
@rbnchm Depends on the motor in the train. Electric trains work by varying the magnetic field, shifting north to south. By doing so, the magnetic force creates a spin by pushing or attracting its opposite fields and this force is attached to the wheels via gearing. This is basically how electric motors all work. A steam engine moves the high pressure air (pressured from the heat generated by burning) through a cyclinder where it's eventually exhausted out, releasing and exhanging the pressure.
If I could bring to life only one person, AAAAAAANY person that has EEEEEVER lived, that would be my hero Feynman, no doubt about it. Soorry grandma I only had one choice!!
Richard Feynman is great! How I wish he'd been my science teacher when I was at school. (and maybe given me a hand with the mathematical side of science which was always my weak point.) Now, as an adult, I realize how fascinating science is and wish I was doing something in a scientific field.
It's tragic we don't have people like Feynman around anymore. The job of making physics interesting for the general population is left in the hands of retarded dumbfucks like Michio Kaku, who does nothing but getting cocaine-high on the publicity of lies, ridiculous exaggerations and incoherent, self-contradicting technological fantasies, to the point of delusions of grandeur. If only someone in the field would speak out about this, the coming generation takes him seriously because of his Ph.D.
another one.. imagine a clock which second hand is so long that each tic at its outer edge travels a distance of 186,000 miles (in other words, the speed of light) and you are standing at the center of the clock on the second hand traveling with it watching the outer edge with a telescope... what would you see?
Theoretically, I think you may be right the more I think about it because the image coming back to you is increasingly longer, so image will appear to be curved. Hmm.
it would look strange, it would appear really blurry and streched out, clock would look to the observe to be a kind of spiral really twisted out towards the end, it would get more and more blurry the further out from the center you look at it, and towards the end it would be really blurry.
Honestly I don't know the answer. I thought of this while I was high on hash. But it seems to me that if this was a real scenario, it would depend on the material that the second hand was made from. I think that even the strongest known material would turn into radiation?? before reaching the speed of light. Of course you would easily be able to calculate how fast that light would come back to you which also effects what you see. And what about the power of the scope? I really don't know. lol
As long as the thing is in a vacuum and you ignore the fact that the centripetal force would be so enormous that the tip would probably break and fly off, The material would not really matter. Because the laws of physics are the same for every frame of reference, near speed of light phenomena are observational phenomena, that is, from one perspective the it appears to be stretching longer, but if you go to the reference frame of the hand on the clock, it would not be stretched out at all.
You're asking the wrong question. Nothing can go at the speed of light. Theoretically the hand could go at 0,99c but even that would require ridiculous amounts of energy.
Yeah, at the very tip of the clock it would be very close but not quite the speed of light. But you can infer that he means something arbitrarily close to the speed of light and not actually the speed of light.
What I like about Feynman's intelligence is that he makes it possible to avoid being intimidated by all that tedious technical jargon and complex number crunching!
wow....most frats only require that you go through months of constant alcohol consumption, kidnappings, and wild stunts topped off by a week of sitting in a pile of your own waste, without sleep, with 30 other guys who will turn out to be your closest buddies. MIT's a little different I guess.
I love the fact that Feynman was so excited about seemingly the most mundane of things. He really had a wonderful mind, and one that we were blessed to have with us while he was alive. R.I.P.
Well the fun of it, like he said, is trying to figure it out. If you didn't know why and tried to figure it out logically you could have a lot of fun with it.
I learned this when I was getting my engineering degree.
Now I get to drive the train and make the horn toot.
culwin 21 hours ago
I've heard quotes from this guy but never seen him in person. He is very mercurial.
johnnyk427 5 days ago
he likes trains!!! and he will not blend!!!
nextblain 2 weeks ago
This man's passion for physics and engineering is so infectious!!
4thstepproductions 2 weeks ago
Just to join a fraternity. Science is awsome.
GarrettTheCanadian 3 weeks ago
I have to admit that I didn't know this. But are the tracks "conical" as well? (Is the outer edge of the rail higher than the inner so that there is "full contact" all across the rail between it and the wheel?) They have to, don't they? But this would cause extra friction - so the difference has to be as small as possible. In curves the tracks as a whole are tilted (and thus the train), which keeps the train where it should be (or at least helps to do so), but that's another story. Enlight me!
episcophagus 3 weeks ago
@episcophagus I run ut of space... I have noticed that the inner side of a rail is rounded, so I thought that this rounding corresonds to an inner "conical" part of the else flat wheel (before the "safety disk") that rests on the else flat track. But if the train goes "astray" the conical part of the wheel will climb up the rounded part of the rail and then slide/steer back.
episcophagus 3 weeks ago
Where can i read more about such physics fun ... there has to be a book
mindauggas 1 month ago
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Penthaligon 3 weeks ago
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@mindauggas The Feynman lectures I would reckon. Written by the man himself.
Penthaligon 3 weeks ago
That was a news for me.
rycka1983 1 month ago
Sounds like the best frat initiation ever.
TehRattlesnake 1 month ago
great video thanks
smuggecko 1 month ago
we like trains
demonhuntevo 2 months ago
AMAZING, I never new that :)
g00hz 2 months ago
i like trains o.o
kuvuki68 4 months ago 2
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wa9r 4 months ago
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wa9r 4 months ago
Fucking awesome. I could listen to this guy forever.
kbrinks 5 months ago 7
2:02 - He said "shaft".
lewko1 6 months ago
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FifiAwesome 6 months ago
Ahhhh... back when people actually knew stuff.
Androly 6 months ago 3
@Androly according to the Flynn effect, the average IQ is actually increasing. It's just always noticeable when people don't know things.
AwfulPun 6 months ago
@AwfulPun Technically the average IQ always stays the same at 100, because its a measurement of the persons IQ relative to the general population. Well at least when the tests are standardised. ;) Just being picky, if you've heard of the flynn effect I know you know that!
TawntheAtheist 4 months ago
Further... farther...
GeoM56 6 months ago
Great explanation! Audio volume is a little low though.
xuimod 6 months ago
This has been flagged as spam show
I wish I didn't watch this video
scrummitch 6 months ago
That is horrifying.
XA36 6 months ago 4
WTF i travelled years on trains. I wish I didn't know that trains have wobbly wheels.
richerite 6 months ago 5
We should make a series named: "Things that Feynman DON'T know!". I think it will be the shortest series ever made.
Blomsterbob2K 6 months ago 6
@Blomsterbob2K You wouldn't have enough material to make the pilot episode.
IMadeOfClay 2 months ago
needs more pictures
lamerthenlife 6 months ago
kids should be forced to watch the feynman lecture series in school.
MutinyEvo 6 months ago 6
I wish I could care about anything as much as this man cares about trains.
OpenCasketMaterial 6 months ago 5
Train goes in, train goes out. You can't explain that.
broadsword530 6 months ago 9
@broadsword530 LOL. That's killing me...O' Reilly.
roddiero 6 months ago
MIRACLES!
steve8093 6 months ago
I hate trains
-ragesh
S3LAiiiTRECE 6 months ago
I fucking love science and engineering.
a84dd0n 6 months ago 8
@a84dd0n indeed!
BLaZeDRas 6 months ago
I love trains.
HomersimpsoninPortal 6 months ago
Vehicular jargon confuses me.
TwistedLemniscate 6 months ago
Contagious is definitely the best word to describe Feynman's love for Physics. Apart from being an inventor of new concepts, he has also inspired so many others to study Physics, including me.
rsotbairnfire 7 months ago 4
@rsotbairnfire and me!
IMadeOfClay 2 months ago
I never thought someone could make me eager to read about trains for an hour on wikipedia.
FriendlyFantom 7 months ago 62
genius because he fucking invented nukes, repaired radios, designed power plants, discovered new branches of phisics, programmed computers (by punch cards), has an amazing insight into the humand mind, and became an expert in anything he was ever exposed to. god in a field of poor sorry humans
Sirus20x6 7 months ago 4
#physics
amaizel 7 months ago
This comment has received too many negative votes show
Why is he a genius again? Because it took him a professorship to learn what every railway tech knows, or just because he explained it to you and now you think he invented it....?
ZutaMacka666 7 months ago
@ZutaMacka666 no asshole! because he is one of the father of q.e.d and he knew phisics like no other! And also, he was a enthusiast, he passed his knowledge to other like if it was he's greatest times!
amaizel 7 months ago 4
That's so simple yet so effective. Brillilant.
mareksw 7 months ago 4
Was he ever a professor at a University? He would definitely be able to keep my attention in class regardless of topic.
c0nv1ct1337 7 months ago
@c0nv1ct1337 Yes, if I recall correctly, he was at one point a physics professor at a University. Quite a popular professor too, for obvious reasons. Forget where he taught at, though.
sbunkboy3 7 months ago
@sbunkboy3 It was at Caltech
GuardMarcellus 6 months ago
@sbunkboy3 He also ran an informal session called 'Physics X' for many years where students could approach him about any physics topic they liked and he would explain it to them. Apparently they never managed to catch him out (even though they tried!)
IMadeOfClay 2 months ago
Trains are now a fucking engineering marvel to me!
DamienZshadow 7 months ago 2
Miracles.
dmora97tt 7 months ago
@dmora97tt I have just completed an engineering software project which is used for calculating dimensions for the structures that hold the power lines over electrified rails. Holy shit the math and physics are intense. And I had to actually figure some of the stuff out myself. Having been a code monkey for good 10 years, with no exposure to hard phys/math, this was quite an interesting project.
FizzlNet 7 months ago
@FizzlNet Now I'm kinda terrified and wonder how in the fuck do the trains run at all in Finland with the deep ground frost that moves all the shitaround several centimeters each year.
FizzlNet 7 months ago
What's a train engineer zombie say ?
" Traaaiiiiiiiiiiiinnnnnnnnsssssssss "
1isaacmusic 7 months ago
Well. I didn't know that. Now I do. Cool.
TheNewCrankyWorkshop 8 months ago
Train goes in, train goes out, you can't explain that.
mprata77 8 months ago 86
These trains go whoop.... whoop. That's a parallel universe.
Stomplebane 8 months ago
I get so pissed when i see a person with a mind like this not ruling the galaxy or some shit. People like this should be the backbone of civilization, not clergymen or politicians.
0baalberith0 8 months ago 5
watch?v=J4TPbGBPWME
they dont look conical to me?
thegoonist 9 months ago
@thegoonist : It's very slight, but it's there. If you find yourself looking at a train in person, try looking directly at the side of a wheel from some distance. You can see the tread right the way around.
TheNewCrankyWorkshop 8 months ago
@MCBathtub Tides are the result of the Moon's gravity distorting the space around Earth. Water, being flexible, responds more dramatically than, say, rocks, and moves in a tidal fashion, following the distortion that the Moon's gravity creates. This movement of water creates friction along the Earth's surface and this friction slows down Earth's revolving so that each day is slightly slower than the one before. Over time, it's quite measurable. During the dinosaur era, the day was 18 hours.
lazurm 9 months ago
@lazurm We only gain 2 ms per century due to this though.
bsodmike 8 months ago
@bsodmike Actually, due to the acceleration of rotation affects from Earth's elliptical orbit, it's more like -1.7 milliseconds per century, at this time. Even this, after one billion years results in an increase of 28 minutes. But, note that the Moon was much closer to Earth in the past and, at that time, the affect was much more significant.
lazurm 8 months ago
He always seems like he's about to burst out into laughter.
SummerKingdom 9 months ago
woot i got the train one!
KaylinJH 9 months ago
im not an engineer, physics expert etc, but i knew that. only cause I've been to the fascinating rail museum in ipswich, qld. and the history behind it is cool, too.
jeebersjumpincryst 11 months ago
unbelievable. we need more minds like these!
quazifnatik 11 months ago 4
i'll fight any man, woman or child that disliked this.
WarbossPepe 11 months ago 11
railway-technical wheels and bogeys agrees with this.
PikPobedy 11 months ago
That is insanely clever. It's amazing how a such a seemingly small and unimportant thing could have had so much thought put into it.
h7dders 11 months ago 3
If you think the things he are talking about are mundane then I feel sorry for you. I am as amazed by these things as Feynman is.
bodysnatcher0421 11 months ago
@bodysnatcher0421 Ah, but the mundane things are incredible. It's their incredible-ness that Feynman discovers with us in his discussions.
lazurm 9 months ago
i did not know that!
atmark666 11 months ago 2
I've been watching aload of these videos out of sheer interest but this one... I had literally no idea thats how trains stayed on the track that's facinating.
Mind = blown
insoms 1 year ago
@insoms it is quite easy if you make an outline of what he tried to say and then think for little while. It is actually very interesting )))
chizhr 1 year ago
@chizhr I didn't say I didn't understand I said I've been watching all these videos. I actually already knew every word he said in everyone I'm a Mechanical Engineering student (but my true passion lies with Physics).
If you read what I said properly you'd see that I said I had no idea thats how trains stayed on the track that part was completely new to me which I found facinating (how its such a simple and elegant solution).
Where did you get "I don't understand this guy" from that?
insoms 1 year ago
@insoms Where did you get "You don't understand" from what chizhr said? He just told you how one easily (!) can understand this video. Nevertheless chizhr's post is somekind of useless, since there is no new information included. [...don't take this too serious]
So you are a mech. engineer whose real passion lies in another field (physics)? Why didn't you simply study physics?
Th0111 11 months ago
@Th0111 My point was I never said I didn't understand the video I understood every word.
And I'm looking into transferring at the moment just theres more job oppourtunities for undergrads in Engineering, Physics you need a phD or have to count on benig able to get an engineering job without an engineering degree.
insoms 11 months ago
I don't understand why 12 people dislike this!! "I really don't like the way trains make turns!!!"
waitwhatwasthat 1 year ago 4
mindblowing
cuttaugood 1 year ago
ohh.. the wheels are conical.. I get it, but I didn't know that... so cool
FSMonster 1 year ago
What scares me is how a train just went by as I watched this!!!
MrCaptainDerp 1 year ago
i did not know this! thank you Feynman!
matthewdoucette 1 year ago
I love how even though he is a doctor of physics, he is still fascinated by simple things that have been figured out a hundred years ago. I mean, they seem simple now, but he can appreciate just how ingenious the invention is.
WarPhalange 1 year ago 6
This comment has received too many negative votes show
The correct answer to "what keeps a train on a track" is in fact "yo' momma's fat ass".
WarPhalange 1 year ago
You know what is even more amazing?
The train system was invented hundreds of years ago, by men with paper and pencil. No calculators, no computer simulations, and few of them had education beyond high school.
It seems that as we moved forward, we forget basic principles.
I have $20 in my pocket that says that 95% of the mechanical engineers coming out of school today have no idea how a train stayed on the tracks.
PS. I didn't either.
karozans 1 year ago
@karozans given that i know a mechanical engineer student in the final year of study who made himself a cab for cheating at an exam that had the definition for mechanical work written on it I think you'll be keeping that 20$.
zapopaul 1 year ago
If they made this programme today, the producers would fill it with animations to illustrate what he's describing and completely RUIN it. Thank you Mr Sykes.
sendaitohoku 1 year ago
He is to physics as Chuck Norris is to strength.
Another1LikeYou 1 year ago 3
@Another1LikeYou No, because Chuck Norris sucks.
dgpsf 1 year ago
@stake101 he'd probably make a good anything. But i'd much rather have him a physicst anyday of the week.
googoo120 1 year ago
This has been flagged as spam show
Asian wives waiting **busizz4me.info**
jayceejaydaify 1 year ago
woah that's sick
lumaix 1 year ago
How can 12 people be so retarded that they DISLIKE this?!?
I luv ya Rick ;-)
imajeenyus42 1 year ago
مبدع
masferrr 1 year ago
@masferrr That he is, that he is
Vennificus 1 year ago
He talks about stuff I havn't ever even contemplated! Inspiring!
stuboyah 1 year ago 9
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tsuikjoshiomatsu 1 year ago
Magic. Got it.
alien0verlord 1 year ago 9
This comment has received too many negative votes show
HI DIGG! LOL!
bpaustin3 1 year ago
*sigh* Mind blown.
aiyic 1 year ago 8
He seems so excited about sharing some knowledge. So wonderful.
diddykv 1 year ago 20
lol, Richard Feyman just taught me how a train stays on its track. thats so awesome. i love this man, i just learned his name for the first time two weeks ago. RIP legend
Specter00013 1 year ago 21
fucking trains how do they work?
rbnchm 1 year ago 259
@rbnchm Electric trains move via magnets that transfer the energy by changing their magnetic state in a way that pulls the train wheels continuously in the direction of the changing magnetic power, sort of like a magnet pulling or pushing a metallic object, but the object is in the shape of a train wheel. Old time locamotives did this by transferring the heat of burning coal to a water vessel where the heated water, steam, would push against a cylinder connected to a rod that pushed the wheels.
lazurm 9 months ago
@rbnchm Depends on the motor in the train. Electric trains work by varying the magnetic field, shifting north to south. By doing so, the magnetic force creates a spin by pushing or attracting its opposite fields and this force is attached to the wheels via gearing. This is basically how electric motors all work. A steam engine moves the high pressure air (pressured from the heat generated by burning) through a cyclinder where it's eventually exhausted out, releasing and exhanging the pressure.
lazurm 8 months ago
If I could bring to life only one person, AAAAAAANY person that has EEEEEVER lived, that would be my hero Feynman, no doubt about it. Soorry grandma I only had one choice!!
nestorlovesguitar 1 year ago 164
Outstanding!
Hoz2001 1 year ago
so great!
whydie666 1 year ago
Does anyone know a website or something with questions like the train or the mirror thing? Interesting stuff to think about, I'd like more.
spiraldude 1 year ago
I thought gravity kept the trains on the track.
nealart 1 year ago 2
@nealart It does, yes! But it keeps it down. The idea here is to keep the train ON the tracks
cyberflo999 1 year ago
he is a super genius and very good in explaining things
ragnsv 1 year ago 2
ChristopherJSykes Rocks !!!
WoodstockHippie1969 1 year ago
Who the hell could dislike this???
savinay1983 1 year ago 8
Cool, I stopped the video so I could think about it and try to figure out the train question.. It turns out I had figured it out correctly!
aoeuuiaiui 1 year ago
Crazy man !
bublik20 1 year ago
Richard Feynman is great! How I wish he'd been my science teacher when I was at school. (and maybe given me a hand with the mathematical side of science which was always my weak point.) Now, as an adult, I realize how fascinating science is and wish I was doing something in a scientific field.
DrZenith 1 year ago
what fraternity was he in?
5minmajor 1 year ago
lol...creepy smile
Mrjuliancito30 1 year ago
explains that well no charts no powerpoint infectious
fabfabregas1 1 year ago 5
I love the way he explains it: Figuratly.
Ko252 2 years ago 4
But I thought it was using magnets!
UnrivaledShogun 2 years ago
I love that he sounds like Jackie Mason.
lebowski7336 2 years ago
You're right! He does!
Sooo funny.
werehavinaparty 2 years ago
wow i never really knew that about trains, amazing........something soo simple
TaNgLeD2121 2 years ago 10
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It's tragic we don't have people like Feynman around anymore. The job of making physics interesting for the general population is left in the hands of retarded dumbfucks like Michio Kaku, who does nothing but getting cocaine-high on the publicity of lies, ridiculous exaggerations and incoherent, self-contradicting technological fantasies, to the point of delusions of grandeur. If only someone in the field would speak out about this, the coming generation takes him seriously because of his Ph.D.
enHanzable 2 years ago
another one.. imagine a clock which second hand is so long that each tic at its outer edge travels a distance of 186,000 miles (in other words, the speed of light) and you are standing at the center of the clock on the second hand traveling with it watching the outer edge with a telescope... what would you see?
AhYaOk 2 years ago
A bunch of broken clock pieces flying back to earth..... get out of the way!
elsakoo 2 years ago
Oh god... that is a good one.
Mastan0 2 years ago 2
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AhYaOk 2 years ago
also.. WHEN whould you see it?
AhYaOk 2 years ago
OK, my mind is completely blown right now. That is crazy!!
mrpragmatic100 2 years ago 3
I will see the second hand curving from the top, bending toward left.
ahmednader122 2 years ago
Theoretically, I think you may be right the more I think about it because the image coming back to you is increasingly longer, so image will appear to be curved. Hmm.
AhYaOk 2 years ago
it would look strange, it would appear really blurry and streched out, clock would look to the observe to be a kind of spiral really twisted out towards the end, it would get more and more blurry the further out from the center you look at it, and towards the end it would be really blurry.
Wcoltd 2 years ago
Honestly I don't know the answer. I thought of this while I was high on hash. But it seems to me that if this was a real scenario, it would depend on the material that the second hand was made from. I think that even the strongest known material would turn into radiation?? before reaching the speed of light. Of course you would easily be able to calculate how fast that light would come back to you which also effects what you see. And what about the power of the scope? I really don't know. lol
AhYaOk 2 years ago
As long as the thing is in a vacuum and you ignore the fact that the centripetal force would be so enormous that the tip would probably break and fly off, The material would not really matter. Because the laws of physics are the same for every frame of reference, near speed of light phenomena are observational phenomena, that is, from one perspective the it appears to be stretching longer, but if you go to the reference frame of the hand on the clock, it would not be stretched out at all.
Wcoltd 2 years ago
You're asking the wrong question. Nothing can go at the speed of light. Theoretically the hand could go at 0,99c but even that would require ridiculous amounts of energy.
maxorxo 2 years ago
Yeah, at the very tip of the clock it would be very close but not quite the speed of light. But you can infer that he means something arbitrarily close to the speed of light and not actually the speed of light.
Wcoltd 2 years ago
good question lol i cant figure it out please share :)
wilmslowforlife 1 year ago
What I like about Feynman's intelligence is that he makes it possible to avoid being intimidated by all that tedious technical jargon and complex number crunching!
TardisGeek 2 years ago
Feynman was a treasure to humanity
FissionNonStop 2 years ago 9
I found this far easier to picture than the mirror example.
Sconz32 2 years ago
Damn! my mind has been blown again!
cheeseychessnut 2 years ago 11
Mind blow job!!!
odacity509 2 years ago 2
Woahhh!!!!!!!!!!!!!!!!!!!1
(of course, he didn't figure it out, he's just repeating something that some genius figured out)
(the main genius is that he is capable of explaining this so simply -he is a great teacher)
richardcadbury 2 years ago 9
Awesome!
SquirrelGott 2 years ago
Fascinating! This is such a great illustration of elegance and simplicity in engineering.
channelYush 2 years ago 12
My grandfather worked on railroads all his life, died in 1966 at age 79. He probably never knew this about trains.
RhondaH 2 years ago 5
wow....most frats only require that you go through months of constant alcohol consumption, kidnappings, and wild stunts topped off by a week of sitting in a pile of your own waste, without sleep, with 30 other guys who will turn out to be your closest buddies. MIT's a little different I guess.
emblemOFbeing 2 years ago 10
judging by the rest of the comments on this page, this comment is going to either have many thumbs up or many thumbs down.
unless im gay
BF2OMG 2 years ago 8
I love the fact that Feynman was so excited about seemingly the most mundane of things. He really had a wonderful mind, and one that we were blessed to have with us while he was alive. R.I.P.
Zackattack52287 2 years ago 63
@Zackattack52287 I know what you mean. It's like he was telling a joke, and was trying hard not to laugh before he could tell the answer.
I suppose it's like finding out the answer for yourself to a problem, and you get that thrill of joy when you work it out.
yakk999 1 year ago
you learn something new everyday, fun fun
HumanStrategy 2 years ago 11
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bouncerhiphop 2 years ago
This comment has received too many negative votes show
high speed rail cant be like that too?!
gymgymgymgym 2 years ago
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HobbyistX 2 years ago
This comment has received too many negative votes show
according to your idiot definition, feynman was a "troll". try truth.
2ndAsstJizzMopper 2 years ago
He was both a genius in his research, and as a teacher.
AarghGrr 2 years ago 3
Wow. Just, wow!
badmanners411 2 years ago 6
One true genius.
TheSleepaholic 2 years ago 85
He was pretty smart, but all he's doing here is repeating a fact he learned. The real genius is the guy who designed this.
jeh506 2 years ago
Ja, of course. But I don't just mean because of this video. Overall he is a genius. The way he understands things and is able to explain them.
TheSleepaholic 2 years ago 11
Well the fun of it, like he said, is trying to figure it out. If you didn't know why and tried to figure it out logically you could have a lot of fun with it.
WNxFish 2 years ago
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cutesexybabe69 2 years ago