8. Two sound waves differ in their intensity levels by 20 dB. What is the ratio of their displacement amplitudes?
(A) 2;
(B) 10;
(C) 100;
(D) 400;
(E) None.

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統計: A(0), B(0), C(1), D(1), E(0) #3188039

詳解 (共 1 筆)

#7000356
1. 題目解析 題目給出兩個聲波的強度...
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