Question
Draw a diagram to represent a sound wave.
Draw a diagram to represent a sound wave.
More number of waves say that the sound is high pitch while less number of waves tell you the the sound is low pitched.

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A boy weighing 50kg climbs up a vertical height of 100m. Calculate the amount of work done by him. How much potential energy does he gain? (8 = 9.8m/s2).
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