Dolphins of the open ocean are classified as type ii odontocetes (toothed whales). these animals use ultrasonic "clicks" with a frequency of about 55.3 khz to navigate and find prey.
(a) suppose a dolphin sends out a series of high-pitched clicks that are reflected back from the bottom of the ocean 86 m below. how much time elapses before the dolphin hears the echoes of the clicks? (the speed of sound in seawater is approximately 1530 m/s.)
answer in seconds
(b) what is the wavelength of 55.3 khz sound in the ocean?
answer in mm