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A DVD disk with a diameter d = 12 cm spins with an angular velocity ω...

A DVD disk with a diameter d = 12 cm spins with an angular velocity ω = 4600 rpm (revolutions per minute). What are its (a) frequency f in rev/s (Hz), (b) period T in seconds, and (c) angular velocity ω in rad/s?

a) f = 76.7 Hz

b) T = 0.013 s =13.0 ms

c) ω = 481.9 rad/s

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