Science!! Fucking magnets, how do they work?

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Obsidian

Obsidian

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Running Dog_sl said:
University of St Andrews scientists create 'fastest man-made spinning object'

"They were able to levitate and spin a microscopic sphere at speeds of up to 600 million revolutions per minute...

The team balanced it on a laser beam in a complete vacuum and then spun it using the light itself. They saw it spin faster and faster until it reached 600 million rpm - and then it seemed to vanish!

The researchers don't know what happened to the sphere - but one possibility is that the object may have reached some theoretical speed limit - after which it changed in some way. "

http://www.bbc.co.uk/news/uk-scotlan...-fife-23861397
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Am I reading this right? The object just disappeared? As in the object is totally gone, no one knows where it is etc? That seems like a pretty big thing if that's the case
 
iannis

iannis

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calcium carbonate. Are they sure it didn't just disintegrate into it's constituent elements? Maybe they hit the point at which the spin was exerting more force than the molecular bonds were exerting? And if that's the case, I guess you could call it a cosmic speed limit -- but that's kinda sorta dumb.

article_sl said:
The rotation rate is so fast that the angular acceleration at the sphere surface is one billion times that of gravity on the Earth surface. It's amazing that the centrifugal forces do not cause the sphere to disintegrate."
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Until it does? I mean I'm not trying to be a smartass here but there's got to be a better explanation than "MAGIC!!!".
 
Tuco

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Here's my guess on the process:

Tester: "Ah it fell off its laser beam again we don't have the tools to track it"
Researcher: "We don't know where it went"
Principle Researcher: "We may have made an exciting discovery by making an object disappear!"
Journalist: "Scientists invent teleportation by spinning object fast enough"
People on my facebook wall: "Hey did you know that teleportation is now possible? I love science."
 
K

Kedwyn

Silver Squire
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Iannis_sl said:
calcium carbonate. Are they sure it didn't just disintegrate into it's constituent elements?
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That was my first thought.

Different topic (the spinning made me think of it for some reason) but I get a kick out of them levitating objects in massive magnetic fields. I saw a video of a levitating frog once and seeing that just makes me dream of anti gravity rooms at your local Dave N Busters.
 
D

Dabamf_sl

shitlord
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Tuco_sl said:
Here's my guess on the process:

Tester: "Ah it fell off its laser beam again we don't have the tools to track it"
Researcher: "We don't know where it went"
Principle Researcher to journalist: "We can't seem to find it."
Journalist: "Could it have disappeared?"
Researcher: "We probably just lost track of it"
Journalist: "but there's a chance it disappeared right"
Researcher: "probably not but anything is possible I guess"
Journalist: "Scientists invent teleportation by spinning object fast enough"
People on my facebook wall: "Hey did you know that teleportation is now possible? I love science."
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fixed to be realistic
 
R

Running Dog_sl

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Iannis_sl said:
calcium carbonate. Are they sure it didn't just disintegrate into it's constituent elements? Maybe they hit the point at which the spin was exerting more force than the molecular bonds were exerting? And if that's the case, I guess you could call it a cosmic speed limit -- but that's kinda sorta dumb.



Until it does? I mean I'm not trying to be a smartass here but there's got to be a better explanation than "MAGIC!!!".
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Yeah the news article seems to have tried to spice up the story with the sphere "vanishing". From what I can gather elsewhere it just flew apart, although that's interesting in itself given it was due to the spin speed.
 
F

fucker_sl

shitlord
677
9
Tuco_sl said:
Here's my guess on the process:

Tester: "Ah it fell off its laser beam again we don't have the tools to track it"
Researcher: "We don't know where it went"
Principle Researcher: "We may have made an exciting discovery by making an object disappear!"
Journalist: "Scientists invent teleportation by spinning object fast enough"
People on my facebook wall: "Hey did you know that teleportation is now possible? I love science."
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Dabamf_sl said:
fixed to be realistic
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Numbers_sl said:
American made cell phone turns out to cost about as much as one made in China.http://hosted.ap.org/dynamic/stories...08-28-12-19-53
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do i see a connection ?
 
TheBeagle

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Tuco_sl said:
article says it's 4micrometers, at 600million rpm that's around 125m/s right? Pretty cool. I wonder how much centrifugal force is exerted.
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No such thing as centrifugal force. It's just simple linear momentum tangential to the radius. But the article did mention that it's angular acceleration is one billion times that of gravity at the earths surface, so thats 9,800,000,000 m/s^2. Maybe plug that into Newton's second law to derive the force, F=ma? I always hated the circular motion sections in Physics.
 
Tuco

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TheBeagle_sl said:
No such thing as centrifugal force. It's just simple linear momentum tangential to the radius. But the article did mention that it's angular acceleration is one billion times that of gravity at the earths surface, so thats 9,800,000,000 m/s^2. Maybe plug that into Newton's second law to derive the force, F=ma? I always hated the circular motion sections in Physics.
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bitches don't know about my fictitious forces.

I didn't get the angular acceleration bit. I interpreted it as 'it's spinning a billion times faster than the earth!'. To me any time the number is as generic as billion I don't really pay attention to it.
 
Izo

Izo

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20 Year anniversary for Bill Nye the Science Guy
szgjIPa.jpg

http://instagram.com/p/eF52KWEeLv/#
Yesterday anyway.
 
T

The Ancient_sl

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I was wondering why I thought this had already happened.

Evidence from particle data had already pointed toward the conclusion that the probe succeeded. In late July and early August of 2012, scientists saw dips in the concentration of particles made in the solar system, and peaks in particles made outside.
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Tuco

Tuco

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Stupid question, if we made another voyager that technology do we have currently that could continuously accelerate the spaceship so it's not stuck going 38,000mph indefinitely?
 
A

azeth

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haha i don't know how stupid of a question that is. Do we have any resident propulsion or rocket scientists?
 
B

Burnesto

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Tuco_sl said:
Stupid question, if we made another voyager that technology do we have currently that could continuously accelerate the spaceship so it's not stuck going 38,000mph indefinitely?
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I haven't heard of much. They're probably still just limited to slingshotting off of Jupiter.
 
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