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August 29th, 2013, 02:24 AM   #1
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Is 600 million revs/minute = 18 billion meters/minute?

Hi, I have a speed question: If a sphere sized 4 millionth of a meter spins at a rate of 600 million revolutions per minute, does the speed of its revolution linearly equate to 18 billion meters per minute (the speed of light)? I want to know if 600 million revolutions per minute in the context of the article below equals the speed of light. I tried to compute it manually and got values which are equal if the sphere was sized 3 millionth of a meter, but I want to be sure because I'm not good at math at all. http://www.bbc.co.uk/news/uk-scotland-e ... e-23861397
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August 29th, 2013, 03:17 AM   #2
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Re: Is 600 million revs/minute = 18 billion meters/minute?





So 600 million revs/minute 7540 meters/minute
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August 30th, 2013, 03:59 AM   #3
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Re: Is 600 million revs/minute = 18 billion meters/minute?

You say a sphere "size 4 millionth of a meter". Is that the radius or the diameter of the sphere?
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August 30th, 2013, 06:33 AM   #4
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Re: Is 600 million revs/minute = 18 billion meters/minute?

Quote:
Originally Posted by HallsofIvy
You say a sphere "size 4 millionth of a meter". Is that the radius or the diameter of the sphere?
I checked that in the article and there they say it is the diameter
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