Dolphins of the open ocean are classified as Type II Odontocetes(toothed whales). These animals use ultrasonic "clicks" with afrequency of about 54.8 kHz tonavigate and find prey. (a) Suppose a dolphin sends out a series ofhigh-pitched clicks that are reflected back from the bottom of theocean 65 m below. How much timeelapses before the dolphin hears the echoes of the clicks? (Thespeed of sound in seawater is approximately 1530 m/s.) (a) Suppose a dolphin sends out a series ofhigh-pitched clicks that are reflected back from the bottom of theocean 65 m below. How much timeelapses before the dolphin hears the echoes of the clicks? (Thespeed of sound in seawater is approximately 1530 m/s.)
Explanation / Answer
Giventhat the depth of the sea is d = 65m Thespeed of wave is v = 1530 m/s ---------------------------------------------------------------- time taken tohear echo is t = 2d / v = 2*65m / 1530m/s =---------sec