SOLUTION: at cruising speed, a car's tire spins a 4,500 revolutions per microsecond; another tire spins at 150 revolutions per nanosecond. Which car tire spins faster. convert both spees to
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-> SOLUTION: at cruising speed, a car's tire spins a 4,500 revolutions per microsecond; another tire spins at 150 revolutions per nanosecond. Which car tire spins faster. convert both spees to
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Question 482717: at cruising speed, a car's tire spins a 4,500 revolutions per microsecond; another tire spins at 150 revolutions per nanosecond. Which car tire spins faster. convert both spees to revolutions per second Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! at cruising speed, a car's tire spins a 4,500 revolutions per microsecond; another tire spins at 150 revolutions per nanosecond. Which car tire spins faster. convert both spees to revolutions per second
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4500 rev/ms = 4.5E3*1E6 = 4.5E9 rev/sec
150 rev/ns = 1.5E2*1E9 = 1.5E11 rev/sec = 150E9 rev/sec
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The 2nd is faster by a factor of 33 (150/4.5)
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that's some fast rotating, they must be small.
