Physics please help
posted by Anonymous .
A ship mapping the depth of the ocean emits a sound of 37 kHz. The sound travels to the ocean floor and returns 0.65 s later.
(a) How deep is the water at that location?
(b) What is the wavelength of the wave in water?
(c) What is the wavelength of the reflected wave as it travels into the air, where the speed of sound is 350 m/s?