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Thread: Fastest Spinning Object Ever, At 60 Million RPM

  1. #1 Fastest Spinning Object Ever, At 60 Million RPM 
    Forum Professor arKane's Avatar
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    All I can say is it's got my Dremel beat. How do they count that many RPM's? What possible use could this discovery ever be?

    Spinning Slice of Graphene Is Fastest Spinning Object Ever, At 60 Million RPM
    Scientists at the University of Maryland at College Park have managed to clock a floating piece of graphene at an unbelievable 60 million rpm, far faster than any other macroscopic object yet measured. Even crazier: Given graphene's strength, one of the scientists says that may only be a thousandth of its possible top speed.

    Graphene is a derivation of graphite, which in turn comes from carbon. Basically, graphite comes from stacked sheets of carbon, and graphene is made of one-atom-thick separated graphite sheets, which form a honeycomb crystal structure. Graphene has some pretty incredible properties: It conducts electricity better than any other known material at room temperature and exhibits a startling amount of strength, given its 2D structure. A bit of graphene the same thickness as plastic wrap would require 2.5 tons of force to puncture it.
    Uses for graphene are always popping up: antibacterial graphene "paper," lithium ion batteries that charge in minutes, and revolutionary lighting systems, for starters.

    To set the spinning speed record, scientist Bruce Kane took charged flakes of graphene, only a micrometer wide, and sprayed them into a vacuum chamber, where they were trapped in mid-air by electric fields. Explains New Scientist:
    Kane then set them spinning using a light beam that is circularly polarised, meaning it passes its momentum to objects in its path. As a result, the flakes started spinning at 60 million rotations per minute, faster than any other macroscopic object.
    It's not really clear that there are any particular uses for this discovery, but graphene has shown nothing but promise so far, so further research on its spin speed could well lead to scientists stumbling onto something great.


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    Bud
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    Say there was a cylinder in the shape of a donut equipped with momentum passing light beams, filled with enough graphene spinning at 60 million rpm to cause centrifugal force to the size of the cylinder, would it be able to cause the cylinder to levitate? and in the specific directions the light beam could direct them to accordingly?


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    Forum Professor arKane's Avatar
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    Quote Originally Posted by Bud View Post
    Say there was a cylinder in the shape of a donut equipped with momentum passing light beams, filled with enough graphene spinning at 60 million rpm to cause centrifugal force to the size of the cylinder, would it be able to cause the cylinder to levitate? and in the specific directions the light beam could direct them to accordingly?
    Damned if I know. I'm still trying to wrap my head around 60 million RPM's.
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    Bud
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    I think we could make a pro flying saucer out of it.
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