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06/11/2021 4:58 pm
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(a) Explain the terms ‘crests’ and ‘trough’ of a wave? What type of waves consist of crests and troughs?
(b) The flash of a gun is seen by a man 3 seconds before the sound is heard. Calculate the distance of the gun from the man.
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06/11/2021 5:00 pm
(a) The crest is a part of a transverse wave which is the elevation experienced by the wave from the line which is above zero disturbance. Trough is also a part of a transverse wave which is the depression experience by the wave from the line which is below zero disturbance.
(b) Speed of sound = 332 m/s
Time = 3s
Speed = \(\frac{Distance}{Time}\)
Distance = (Speed)(time)
= 996 m