Answer to Question #190779 in Physics for jessica martini

Question

For each of the statements below, indicate whether the statement in italics is true or false and explain your reasoning.

A. You tap repeatedly on a glass bowl, causing it to make a ringing sound. The faster you tap, the higher the frequency of sound that will be emitted by the bowl.

B. A sound source and a sound receiver are moving side by side at the same speed. There will be no difference between the frequencies of sound sent and sound received.

Answer 1

A. True. By definition, the frequency is the number of oscillation in a second. The faster you tap, the more oscillations happen in one second, the higher the frequency of sound will be emitted.

B. True. The difference between the frequencies of sound sent and sound received is observed when a source and receiver have some speed relative to each other (according to the Doppler effect). In this case, since they are moving side by side at the same speed, there is no relative speed, thus, no difference between the frequencies.