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35.  Some
bacteria are propelled by biological motors that spin hairlike flagella.
A typical bacterial motor turning at a constant angular velocity has a radius of 1.5 x 10-8 m, and a
tangential speed at the rim of 2.3 x 10-5 m/s. (a)
What is the angular speed (the magnitude of the angular velocity) of this
bacterial motor? (b) How long does it take the motor to make one
revolution?
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