Physics

Ahmad Lara

8 May, 08:41

Which of the following is an example of the Doppler effect?

Vibrations from a tuning fork pass through the air and cause a nearby dish of

water to produce ripples of the same frequency.

Two identical musical instruments being played next to each other will produce a

sound twice as loud as if only one were played.

A hiker shouts "hello" into a canyon and hears it repeated back several times

before it fades away.

The siren of a police car sounds different when the car is coming toward you

than it does when it passes you.