The amplitude of a wave decreases gradually as the wave travels down a long, stretched string. what happens to the energy of the wave when this happens? (the frequency is the same).

energy decreases

Explanation:

The energy of a wave is directly proportional to the square of amplitude of a wave.

Amplitude is defined as the maximum displacement of the wave particle from its mean position.

So, as the amplitude goes on decreasing, the energy of the wave is also decreasing.

the assestment will probley apele with cause and effect

that would be because of both gravity and friction. so     c