A Compact Disc of a CD Player Has a Moment $\omega$

question 19

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 = I $\omega$ and using the quantization of angular momentum, the approximate value of L 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

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Definitions:

Atrazine

A herbicide widely used to control broadleaf and grassy weeds in crops like corn and sugarcane.

Maneb

A fungicide used in agriculture to protect crops from fungal diseases, but also noted for its potential risks to human and environmental health.