Answer to Question #128144 in Physics for Quanda

Question

1) Name an everyday situation where echoes are undesirable.
2)State experimental factors on which the accuracy of the echo method to determine the speed of sound in air is based.
3) Why does speed increases when waves travel from shallow water to deep water?

Answer 1

1) Among such situations are phone calls, factories and other dangerous facilities.

2) Such factors are air temperature, humidity, and geometry of the room.

3) In shallow waters amplitude of the wave increases, in deep waters the amplitude decreases. The wavelength, therefore, decreases in shallow and increases in deep waters. The speed of the wave is wavelength times frequency, which results in the speed increase.