PH-2257
Echoes and ultrasound
Physics · Secondary 4 · Easy · Echoes and ultrasound
A man shouts towards a cliff and hears the echo 0.90 s later. The speed of sound in air is 330 m/s.
How far is the man from the cliff?
How far is the man from the cliff?
- 75 m
- 110 m
- 150 m
- 300 m
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