PH-783
Echoes and ultrasound
Physics · Secondary 3 · Medium · Echoes and ultrasound
A man stands in front of a large wall and claps his hands. He hears the echo later. What is the speed of sound in air?
- 340 m s⁻¹
- 171 m s⁻¹
- 205 m s⁻¹
- 680 m s⁻¹
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