light, Physics

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INSTANTANEOUS VELOCITY: The velocity of a body at a certain instant of time is known as instantaneous velocity.

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2 upright plane mirrors are 4 meters apart and facing each other. A man stands 1 meter in front of them. Determine the distance between the second images in the mirror

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A certain spring is known to obey Hooke's Law.  If a force of 10 newtons stretches the spring 2 meters, how far will a 30 newton force stretch the spring? Ans: A certain spr

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Heat, what is expansion of solids

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