A sound wave travels in air toward the surface of a freshwater lake and enters into the water. The frequency of the sound does n
ot change when the sound enters the water. The wavelength of the sound is 2.86 m in the air, and the temperature of both the air and the water is 20 degrees C. What is the wavelength in the water
Initially, the experiment has only potential energy (since total energy is the sum of kinetic and potential energy). And at the end, the experment has only kinetic energy.
