Physics · BGCSE / Waves, light and sound
Multiple choicePast exam questionForm 5 · BGCSE
The diagram shows a girl standing between two walls. The girl claps her hands and receives two echoes at a time interval t from the walls. The distance s is 105 m and the distance d is 225 m. The speed of sound in air is 330 m/s. What is the time interval t between the two echoes?
Source: BEC BGCSE Physics 2023, Paper 1, Question 20
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