Question

a stationary destroyer is equipped with sonar sends out pulses of sound 45.000 MHz. Reflected pulses are received from submarine directly below with a time delay of 60 ms at frequency of 44.958 MHz

a) If the speed of sound in sea water is 1.55 km/s, find the depth of submarine.

b) Find its vertical velocity. (Take upward to the the positive direction.)

Answer 1