Q: The energy of a wave depends on time as well as what other property of the wave?


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

The energy effects of a wave depend on time as well as amplitude. For example, the longer deep-heat ultrasound is applied, the more energy it transfers. Waves can also be concentrated or spread out. Sunlight, for example, can be focused to burn wood. Earthquakes spread out, so they do less damage the farther they get from the source. In both cases, changing the area the waves cover has important effects. All these pertinent factors are included in the definition of intensity I as power per unit area:.

 Choices:

- force

- power

- frequency

- amplitude


A:
amplitude