CAPE Physics Unit 1 · 2007 · Paper 1 · Question Q23
A sound wave of intensity I_1 has an amplitude of 30\text{ mm}. Another wave of the same frequency but of intensity I_2 has an amplitude of 10\text{ mm}. What is the value of \frac{I_1}{I_2}?
- (A)3
- (B)9
- (C)27
- (D)81
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