Q: What is a measure of the size of sound waves?


Read this paragraph and choose the correct option from the provided answers:

Amplitude is a measure of the size of sound waves. It depends on the amount of energy that started the waves. Greater amplitude waves have more energy and greater intensity, so they sound louder. For a video demonstration of the amplitude and loudness of sounds, go to this URL: http://www. youtube. com/watch?v=irqfGYD2UKw.

 Choices:

- voltage

- wavelength

- frequency

- amplitude


A:
amplitude