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Physics Sounds Waves And Motion Difficulty: Medium

Sound moves with higher velocity if

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The principle reason why it is better to have two eyes than one is that Excited atoms return to their ground state in_______________? A man standing near a fast moving train may fall___________? If the frequency of a sound wave is 50 hertz, find its time period. A constant force acts on an object of mass 5 kg for a period of 2 seconds. This increases the velocity of the object from 4 ms -1 to 7 ms -1 . Find the amount of force used.