A Compact Disc of a CD Player Has a Moment

question 161

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 × 10^{30 .}
• C) 1.2 × 10³¹.
• D) 130.
• E) 3.5 × 10¹⁵.

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