Multiple Choice
A compact disc of a CD player has a moment of inertia I = 2.5 × 10-5 kg · m2 and rotates at 500 rev/min. Taking L = Iω and using the quantization of angular momentum, the approximate value of n is = 1.055 × 10-34 J · s)
A) 1.2 × 1032.
B) 2.0 × 1030 .
C) 1.2 × 1031.
D) 130.
E) 3.5 × 1015.
Correct Answer:
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