In a Beams ultracentrifuge, the rotor is suspended magnetically in a vacuum. Since there is no mechanical

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In a Beams ultracentrifuge, the rotor is suspended magnetically in a vacuum. Since there is no mechanical connection to the rotor, the only friction is the air resistance due to the few air molecules in the vacuum. If the rotor is spinning with an angular speed of 5.0 × 105 rad/s and the driving force is turned off, its spinning slows down at an angular rate of 0.40 rad/s2.
(a) How long does the rotor spin before coming to rest?
(b) During this time, through how many revolutions does the rotor spin?
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Physics

ISBN: 978-0077339685

2nd edition

Authors: Alan Giambattista, Betty Richardson, Robert Richardson

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