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a water reservoir tankof capacity 250m3 is situatedat a height of 20 m from water level. What will be the power of an electric motor to be used to fill the tank in 3 hrs

A planet is orbiting a star when the star’s gravity suddenly vanishes. The planet then obeys Newton’s First law and heads outward along a straight line. Is Kepler’s second law still obeyed? That...

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