Friday Science: Speed

Tweet about this: bit.ly/TweetScienceofSpeed
Watch it fullscreen!
Speed of earth's rotation at the equator: 1,000 mph
Speed of earth's orbit around the sun: 66,600 mph
Speed of the sun's orbit around the Milky Way: 500,000 mph
Speed of the Milky Way against the Cosmic Microwave Background Radiation: 1,250,000 mph
Speed of the New York City Subway: 30 mph
Universal speed limit: 670,000,000 mph
--
KZbin lopped 2 seconds off the end.
/ joefelice

[@JoeFelice]

Thanks Lisa, for the comment, the tweet, the sub... Great to know you dug it.

[@zQWASZX]

This was awesome! Ur voice is so soothing man. I find my self listening and watching and almost entranced. Yet i don't fully understand what you're talking about till the videos over and it sinks in a bit... Love it man!

[@JoeFelice]

I am talking about earth spinning, but the dark side is not pushing toward the sun; it's pushing toward the direction of earth's orbit around the sun. It's pushing forward while the light side pushes back. So we move faster at night.

[@JoeFelice]

Yes, velocity is subjective to one's frame of reference, and there is no such thing as an absolute frame for stillness. Light ignores our rotating frame of reference but sound does not, because sound requires matter to pass through, and if all that matter is going somewhere, then the sound goes too, independent of its movement through that matter. The speed of sound varies a lot based on the density of the medium it's moving through. At sea level: 761 mph At 35,000 ft: 663 mph

[@JoeFelice]

If you're on a moving train and shine a light in front of you, it recedes from you at light speed. If someone is standing still next to the train, the light also recedes from them at light speed even though you'd expect it to be faster. This seems impossible, but it is made possible by the fact that time is a subjective experience that warps itself custom to you based on your relative motion.

[@apemanfool]

ur vids have really gotten good in the last month or so keept it up i look forward to more.

[@JimmyFatz]

a science video entitled speed and no mention of the speed of light!?! regardless this is an awesome addition to the channel. lovin the schedule. Keep it up!

[@jibronii77]

I'm really liking your videos. They are very eclectic and intelligent. You're my new favorite tuber!!! (You can thank Shay LOL.)

[@JoeFelice]

Nice. I hadn't heard that. I take it the center is the only place where the true energy-generating fusion is taking place.

[@JoeFelice]

I've read that the former is correct; you will experience 8 minutes of gravity.

[@TheseApples]

Fo shizz. But seriously, I'm unbelievably impressed with your channel recently! I figured you were done when you didn't post for months, and I considered unsubscribing, but I'm so glad I didn't. You're quickly becoming one of my favorite KZbinrs.

[@goodolcrushey1]

Out of all the channels i watch, you are definitely the most interesting. I just wished I subbed sooner.

[@TaffyRaphie]

this is my new favourite channel along woth sxephi and shay's channels

[@LisaNova]

You are so smart! i really liked this video...

[@moremegan6847]

Great visuals to push your point forward. I'm glad you Science videos are as interesting as your other videos.

[@Yggdrasill8]

This really establishes "space" in the quote: I am a traveler in space in time

[@JoeFelice]

To reconcile, consider the empty universe as having cleared the way for us.

[@jeremyadamcaldwell]

Joe I like you more and more with each video. they say you learn something new everyday .well today I learned SOOOO much and its all thanks to you and at 1:54 in this video is the coolest thing I have ever seen. Great job Joe

[@JoeFelice]

See, I was just getting a running start.

[@JoeFelice]

The Milky Way is not orbiting a central mass like a black hole. Its movement is affected, though, by other galaxies in what's called our "local group". The local group is the set of galaxies that will hang together with us after everything else in the universe fades away in the distance from expansion. The Milky Way and Andromeda are the only large galaxies in this group, and they are approaching each other.

[@JoeFelice]

I'll cover this at some point--the location of the big bang is everywhere. Space itself has been uniformly expanding since the big bang, not at the edges, but between any two points you choose. Wherever you are, that's where the big bang happened.

[@Taratalk]

This is sweet. I love space.. even though it usually freaks me out I was ok during this... I felt relief when watching it...

[@marbballz]

Ahah! I mean I thought you went away, and when I saw the plug video, and all its nonsense I was confused, but happy to see you in my subscription bar, and now with these topics each week, its actually giving me a reason to think, being an art student I don't really have to do that alot xD So I thank you Mr.Felice.

[@MichaelMidnight]

DUDE! This is awesome! I hope this becomes a weekly thing :D

[@TheNavyHM]

wow i dont even wanna know how long it took to get all these facts figured out

[@JoeFelice]

I believe the stock response is that you should imagine that all the possible universes where life could NOT evolve DO exist. They're out there, empty, broken, with nobody in them to even know how unlucky they are. The life that develops in the few places that can sustain it will surely feel very lucky, and maybe they are, but they're also, in this conception, entirely predictable.

[@JoeFelice]

The earth is what they call a rotating frame of reference. You'd need to tie yourself to another frame of reference in order to take advantage of the difference. I believe the closest example would be the moon. I don't think we'd use it on a grand scale even if we could undo the rotation effect. You could only travel straight west and your maximum speed (at the equator) is only twice that of a commercial jet. Plus you'd have to deal with going faster than sound. Low earth orbit is 16x faster.

[@JoeFelice]

I once saw the rat king.

[@SaltyLocke]

Interesting when you think of it that way. Plus, there's also the thought that you'd have to travel, roughly 17,500 mph to escape the gravity of the earth long enough to escape atmosphere. Imagine thinking on those lines, adding on the galactic speeds listed here.

[@TheseApples]

I'm in astronomy this semester and we talked about this stuff a few weeks ago, but the way you explain it makes it seem fresh. How do you take stuff that I already know and make me hang on your every word anyway?!

[@DellBoy010]

"We're moving faster at night." I like the concept.

[@johnholdun]

Masterful, Joe.

[@NonExist3nt]

Supermassive blackhole Sagittarius A Star. I worked out the speed which we were travelling a couple of years ago - it does make you feel small. And sometimes dizzy...

[@Donyvi]

Edifying, but quite a contrast to the final words of the last video.

[@masterdimsen]

Wow... my mind just blew...

[@urthgurl24]

that blew my mind.

[@JoeFelice]

Word.

[@Chilldogg]

Astro physics can be mind blowing.

[@JoeFelice]

I hope you're talking about Johannes Kepler!

[@JoeFelice]

If you're going to sabotage my work from reaching other people, just don't watch. 1* is for people who don't like the video.

[@catgumart]

light is constant-186,000miles per second--I was told gravity perpetuates at the speed of light--if the sun disappeared now- would we stay in gravity and still witness the presence of the sun for 8.3 minutes (the time it takes light to reach earth)? or would we instantly be thrown from orbit ...hope these questions aren't annoying but I was having a discussion with someone else on this topic and Id like to hear another perspective...

[@JoeFelice]

sidebar.

[@JoeFelice]

I don't know.

[@718Digital]

this is pretty cool!

[@marbballz]

Joe, is it wrong that Ive started to think and ponder on things after I started to watch you.

[@JoeFelice]

Probably a subliminal influence. Science Friday has a better ring to it than Friday Science, but it's trademarked.

[@Wesley_C]

Hii joe, so nice to see you, great old vid.

[@texasjean08]

Awesome Video....my first. I am now a subscriber and a fan! :)

[@Daevas88]

Kinda boring at first, but when you got to the point it was really facinating, so thanks for the info, gave me something to think about:P

[@candlelight377]

That was such a cooooool video :) I loved it

Monty Python Galaxy song is a more tuneful rendering.

[@meekayel]

awesome vid

[@FulMetlSocialist]

Really awesome keep it up!!!

[@catgumart]

This video really makes me think---would you add the velocities of the galaxy speed plus the solar system plus the earths etc...if one rides a jet plane and shines a light those photons don't go any faster than the speed of light weather your on a jet plane or standing still--all this stuff about motion and time is really interesting but kind of difficult to ones mind wrapped around it...at least in my oppinion thanks again!

[@RV510]

Awesome First Science Video. =]

[@JoeFelice]

eat some more treats

[@JoeFelice]

The rate of expansion of space is increasing. The phenomenon is called dark energy.

[@lazyperfectionist1]

Is the galaxy in orbit of something as well?

[@MikeGauld]

Like you said, thankfully the atmosphere is moving along with us. Good insight into the way our galaxy works. My question though, is it an anomaly or do you think it is just perfection?

[@Dirkzero1]

you saw Splinter?

[@Wesley_C]

I got my mind blowed

[@nickdigg5]

wow very interesting

[@NadavShoham]

wow thats good to know!! i think...

[@JoeFelice]

What do you mean?

[@hellalol]

facinating! :)

[@6663000]

cool.

[@TheseApples]

Well keep running, Joe, but don't wear yourself out! Perhaps you could slow down do a leisurely afternoon jog :)

[@basiccomputerhelp]

o yea youtube seems to like to cut off the end if it is just audio. I think that is the entire video this time but i only saw it 2 times

[@JoeFelice]

Next week: paint drying!

[@catgumart]

I have been wondering would there be a way go slower than the earths rotation so that he earth moved beneath some one so they could get from point a to point b?...could this principle be carried over to galactic space travel? could some one slow down within a space so that the solar system or galaxy moves past them..sorta letting the destination come to them...hopefully this doesn't seem like to dumb a question...I admire your rapping skills and creativity thanks for the good videos!

[@asofaihp]

depends on your frame of reference (@philhale)

[@Poppendaddi]

Nerd! Just Playing Awesome Video...I Love This Kind Of Stuff!

[@Xhaosz]

well done, nice documentation: must've been a pain in the ass :D

[@catgumart]

I think we were discussing what passes for now..."now" for me isn't the same as "now" for my identical twin on a 1/2 the speed of light space ship...but "now" at the speed of light is eternal..so everything that has ever happened and ever will is happening simultaneously "now" at the speed of light...which makes me wonder about things like determinism and consciousness, and choice and, any comment on this? thanks for your previous responses! ,glad you got your car back, what a terrible fiasco!

[@catgumart]

Is the milky way itself revolving around something?If so, is what the milky way is revolving around also revolving? Does it go on and on to infinity? finally what is everything moving through?

[@nathangoslin15]

crazy

[@catgumart]

lol--a question came into my mind.How could you be going faster than the speed of sound if you slowed down far less then the rotational speed of the earth?Is velocity a subjective phenomenon only gauged in comparison with another object? I guess light is the only constant, and gravity I have been told also perpetuates at the speed of light...then what is the speed of sound? isn't that constant? or do different conditions effect that? thanks for the response!

[@JoeFelice]

Seriously. Sorry about the false start, guys. KZbin is a fickle bitch. This took about 6 upload attempts and it still cuts off the last 2 seconds.

[@skatepyro]

TRIPPY

[@mickblock]

Nope. It's in motion though. Heading away from the source of 'the big bang' according to astophysics. I knew that the galaxy our solar system is in is rotating. But I didn't realize that it is rotating around a black hole star called "Sagitarius A star" until I watched this video! Unreal! Maybe I'm just amazed because I learned something on KZbin.

[@1mohan]

from about 30 secs to 55 secs in the vid ur talking about the dark side of the earth pushing towards the sun and the light side puching away from the sun. Are talking about the earth spinning?

[@JimmyFatz]

...you're alright felice... :)

[@1mohan]

i am fairly confused.... u start off talking about the earths spin (i.e the earth around its self too) @ north pole then talk about the actual rotation........

[@yumricekek]

black mesa?

[@MissKriekentaart]

I once saw a rat in the NYC subway.

[@johnyqtx]

Awesome! I'm in! Subbed!

[@darkside3704]

well i pose this question to you, do we age slower in space? answer yes why? we move slower thus allows our bodies to live longer. over time we have been adapting using modern medicine and evolution.. so what he is saying is correct its taught at berkley

[@xfftl8myheartx]

That was cool :D

[@MikeGauld]

I mean, is everything just put into place and working in perfect harmony? Is it perfection of multiple mechanisms that work together even though they can all destroy eachother? Or is it an anomoly that just everything is perfect and our we just that lucky that nothing has gone really wrong? I guess is it the, damn we're good, or damn we are lucky. On second thought though, both anomoly or perfection ideas end up in, damn we are lucky.

[@basiccomputerhelp]

that was good better now that you have a ending to it lol

[@JoeFelice]

I despise pseudoscience. Care to elaborate?

[@JoeFelice]

Yes, but collision is a misleading word. It may not be as destructive as it sounds. They could pass through each other. We're approaching at 250,000 mph, and will merge in around 2.5 billion years. Sooner and more threateningly, the earth will be uninhabitable in 1 billion years because the expanding sun will make it too hot. Going to Mars is the most obvious temporary solution if we're still around to have the problem.

[@JoeFelice]

It is wrong.

[@redstripe29]

is it sad that i'm in love with your voice? i mean your videos are great too.. but your voice.....its almost yummy...

[@christabella81]

seriously, what's your IQ? like 234? u should teach, you have a great way of making the complex seem much easier to understand and much more interesting.

[@JoeFelice]

who the fuck

[@Djayitraxx]

One word, Pseudoscience. Nice vid though

[@MarcMan-]

First?