Science off the Sphere: Knitting Needle Experiment
ฝัง
- เผยแพร่เมื่อ 5 ก.พ. 2012
- International Space Station Expedition 30 astronaut Don Pettit uses knitting needles and water droplets to demonstrate physics in space for 'Science off the Sphere.' Through a partnership between NASA and the American Physical Society you can participate in Pettit's physics challenge and view future experiments here: www.physicscentral.com/sots
- วิทยาศาสตร์และเทคโนโลยี
The electrostatic field has a magnetic component.
Water is attracted regardless of field polarity.
It turns out the "gravity effect" where on one side there is attraction, and on the other hand, inertia forces - which forms stable "orbits" like the orbits of the planets.
Thank you you saved my life
Thank you, you helped me get my work done 🙏
I like the way the astronaut tries to make the case for the electric potential being SIMILAR to the way gravity works with planets. When in reality the two are the same thing, The same rules apply on all scales. Every single body in the universe is charged whether it is a planet orbiting a star or a water droplet orbiting a knitting needle. Even our own bodies carry a charge.
Wow, great idea to try this experiment/demonstration.
We have so much to learn. 1000's of years from now, this will be seen as a space parlor trick.
I don't know why, but I love the narration, makes the video so enjoyable
i knew don pettit would come up with more fun stuff to try out up there!
always fun to watch.. thanks and keep em coming =)
Fascinating!
Q: Can the rotation of the droplets be influenced by rotation of the needle?
And: If the Sun would stop rotating, then why don’t the planets fall into the Sun?
I'd like to see what happens to the orbits when you bring a magnet near it!
in a vaccum box
you vaccum tn space. take it back to earth . or take the emply to a vaccum to earth
It takes a science geek to new heights.
More videos like this!
good narration.
What if you put the needle on a drill an spin it? Would the water droplet spin also and be in a locked orbit?
Awesome!
Awesome !!
To have an attraction like this, there needs to be a difference in charge between the two objects. If you applied a charge to the floor of a spaceship, it would attract all the neutral objects inside the ship, but as soon as an object touched the floor, the charges would equalize, and the attraction force would disappear. For this to work, you would need to create an electrical isolation barrier between the floor and all the objects. Also, the amount of charge necessary would be HUGE.
Ah man that just totally blew my mind.
Love this
Amazing and beautiful at the same time.
awesome!
As he said, that is why a differing needle is set near the water jet exit to charge the water drops.
The technology that we are going to be able to design specifically for space are all going to be sooooo amazing.
Love the way he says knitten needle hehe instead of knitting needle
Thank you NASA for being awesome.
Nieźle się tam bawicie, w tym kosmosie.
@DAN3EL The public communication of science and getting the public interested in science is a far more important goal.
좋은 원리 감사함니다
Now that's cool
Interesting!
And this, my friends, is the best 360p quality you'll ever find on TH-cam !
Where do we sign up for more of these?
Truly one of the most amazing videos I've ever seen.
I wonder what effect spinning either the droplets or the needle would have on the motion of the droplet?
We have peaked as a species. I love everything about this video.
@Autonova, Good question. The water droplet is attracted to the charge because of the polar nature and (relatively) free rotative ability of water molecules. Imagine it like water molecules are a bunch of tiny magnets that can all change orientation relatively easily. What happens is all the molecules line up with the charge, which induces a net attractive force. Thus we see the behavior in the video. That's my understanding anyway, someone correct me/clarify if I'm wrong/misinformed. :D
It's rather... beautiful.
Great experiment! Have you tried another materials, like sugar?
just woww!
Damn that's very cool. I love it!
Coolest video on youtube.
Great demonstration. Is that some kind of sowing needle?
Pretty cool! Thanks for sharing :)
As always.. very nice video. :-)
How cool! If anyone up there knits something with your needles, please do share that too! You could knit a moebius loop!
@thethreesuns Not the high/low tides, i meant everyone is blaming "global warming" on car pollution and apparently that alone is causing the ice caps to melt. Im asking if the suns gravitational pull is like the static charge on the needle and we're being pulled closer which would cause the earth to heat up and melt the caps, rather than pollution.
Cool !!!!
@getplaning There is not much resistance to slow the moon down. It is actually getting farther away as it takes energy out of the Earth's rotation.
@dfhohi The water isn't absorbing the charge, no. It is statically charged in a similar way to how the knitting needle is charged, by friction with the Teflon syringe. The syringe is to the drop as the paper is to that first needle...
Interesting.
That is SEW cool!
lovely, thank you for sharing :)
@asdf8926 it could be a sphere as a core? or what would happen if you release one of those magic cubes made of magnetic spheres? or charged teflon spheres
anyone who thinks this is useless, listen to what this dude is saying or just read the description. it can reveal even more stuff about our universe
@pythor2 Oh yeah, good point. Thanks
I mean, he is a wonderful physics professor...
@Mofoe2001 That depends on the initial velocity of the load.
The song 50 50 by the storkes goes perfectly with this video
haha, I love how he says "knittin' needle".
@ringlerum Weren't you listening? He explained perfectly why they orbit.
I counted 19 times. Plus 1 occurrence of "knittin'" and 2 where he just says "knitting needle" (just killing time)
@GPow69 yeah, because water is so magnetic.
@DFredleinPortfolio teflon is hydrophobic, the needle is charged.
Direct vector to the needle before the drop of water hits the charge will cause it to deflect and orbit?
@arjunkc He quite obviously says the needle is 8mm in diameter and that isn't even the contributing factor. Like, right at the start of the video. It has to do with the static charge held by the needle. Which is also clearly stated several times throughout the video.
If any of you twits criticizing this had paid attention, you'd have heard he said this was in his "crew preference" kit. These are items they take that are not related to funded experiments. This was done on his free time and with his own belongings and out of his own curiosity.
INTERESANTE
I would really like to see how water, or other objects behaved around a spherical, round object. My guess is it would continue to orbit around much longer
ohmygoshhhh i love knitting
Proof that you can't judge someone by where they grew up.
SCIENCE!
@Jinmane I would expect that the needle would become slowly de-electrified, eventually causing the droplet to either collide or separate away from the needle.
Don Pettit, you are awesome! And sound cuter than a bug's ear! Thanks for making my day. =)
Fantástic 👏👏👏👏👏
Cool - and I don't CARE how often he said knittin' needle - this was fun! ;-)
knittin' needle
It is wonderful.
I am very interested.
Gravity and kinetic energy
nice
how neat is that?
how long will the charge disappear in the knitting needle?
Interesting to think I'm watching this while on the toilet streaming this through 3g on my phone.. The times are changing with space and phone technology.. But so far the toilet hasn't changed in fifty years
space and science is sooo cool! But how did they get knitting needles into space? I can't even get onto a regular flight with nail clippers!
how about around object was knitted?
Cool
What's that cylinder rod that the water is orbiting?
why do they change direction when going back up?
@planetrob555 Electrons don't really "orbit". Orbitals was a word arbitrarily chosen to represent the different energy levels.
@pharaohoftheincubi without a doubt!
@jfreeman81 I guess he found it interesting to bring some with him to do this kind of experiment.
what if u can manufacturing out of the same niting needle material a sphere and try the experiment again with the sphere suspended with string
how do they take baths in space? sponge baths?
@metalassaultlogin arbitrarily, the needle is in this video
nittin'needle
@BLOWtom Madness?
THIS! IS! SCIENCE!
Do the same principals apply when it is not liquid water, or if it is other frozen gases? If so could this idea have a potential of gathering burnable gases such as methane gas when probes as well as other types of long distance space craft are traveling from earth to distant neighboring systems,in order to provide a quick return to earth for the collection of the probe's data?Last question if it is easy to answer, how long will the specific types of cone ended cylinders maintain there charge?
how do you do that
Would have liked to see two knitting needles parallel to each other.
His accent and pronunciation of some words is a stark juxtaposition to his knowledge of what's happening.
Knitting the needle was said so many times!
make them do double or triple orbits or arrange them in different shapes so they orbit around the "knitting needles"
I'm a bit skeptical that the third knitting needle is required. Water is polar, so experiences electrostatic attraction to charged objects even if it's electrically neutral overall, though the force is not inverse square. If you could charge the droplets (say by connecting a metal plate in the syringe to a battery) then you could use the same pole to accelerate them away from the tip.
A charged sphere with spherical symmetry of the potential would be awesome!
He's all like "it's useful to have these when you want water to orbit a knitting needle" LIKE THAT JUST HAPPENS EVERY DAY. lol