If you were to double the amplitude of a wave on a string while keeping the speed and frequency of the wave constant,the energy delivered by the wave would
A)double.
B)quadruple.
C)be reduced 50%.
D)be reduced to 25% of its previous value.
E)be unchanged.

Question

Quizplus · Accepted Answer

The energy of a wave is proportional to the square of its amplitude. Doubling the amplitude quadruples the energy according to the formula E proportional to A^2, where E is energy and A is amplitude.

If You Were to Double the Amplitude of a Wave