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August 29th, 2013, 02:24 AM  #1 
Newbie Joined: Aug 2013 Posts: 1 Thanks: 0  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/ukscotlande ... e23861397 
August 29th, 2013, 03:17 AM  #2 
Senior Member Joined: Mar 2012 From: Belgium Posts: 654 Thanks: 11  Re: Is 600 million revs/minute = 18 billion meters/minute? So 600 million revs/minute 7540 meters/minute 
August 30th, 2013, 03:59 AM  #3 
Math Team Joined: Sep 2007 Posts: 2,409 Thanks: 6  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?

August 30th, 2013, 06:33 AM  #4  
Senior Member Joined: Mar 2012 From: Belgium Posts: 654 Thanks: 11  Re: Is 600 million revs/minute = 18 billion meters/minute? Quote:
 

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