Ships measure the distance to the ocean bottom with sonar. A pulse of sound waves is aimed at the ocean bottom, then sensitive microphones listen for the echo. Figure P20.45 shows the delay time as a function of the ship’s position as it crosses 60 km of ocean. Draw a graph of the ocean bottom. Let the ocean surface define y = 0 and ocean bottom have negative values of y. This way your graph will be a picture of the ocean bottom. The speed of sound in ocean water varies slightly with temperature, but you can use 1500 m/s as an average value.

Transcribed Image Text:

At (s) 8 6- 4 2- 0+ 0 10 20 30 40 50 60 ( (km)