## Physics: Principles with Applications (7th Edition)

Published by Pearson

# Chapter 8 - Rotational Motion - Problems: 18

30,000 rev.

#### Work Step by Step

The average angular velocity is 0.5(0+15000 rpm) = 7500 revolutions per minute. In 4 minutes, the centrifuge makes (7500rpm)(4 min) = 30000 revolutions.

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