Here's why:
* Waves are disturbances: Mechanical waves are disturbances that travel through a medium, like sound waves in air or water waves in water. They transmit energy by causing particles in the medium to oscillate.
* Energy is carried: The energy associated with a mechanical wave is related to the amplitude and frequency of the wave.
* Amplitude: The maximum displacement of particles from their rest position. Higher amplitude means more energy.
* Frequency: The number of wave cycles passing a point per second. Higher frequency means more energy.
To directly measure the energy carried by a mechanical wave, you would need to consider factors like:
* Wave intensity: The power per unit area carried by the wave. This is related to the amplitude squared.
* Wave speed: The speed at which the wave travels through the medium.
* Density of the medium: The mass per unit volume of the medium through which the wave propagates.
Therefore, it's not the wave itself that's a direct measure of energy, but rather the wave's properties (amplitude, frequency, etc.) that are used to calculate the energy being transported.