Magnitude of the net force acting on the ball problem
When a 58 g tennis ball is served, it accelerates from rest to a speed of 45 m/s. The impact with the racket gives the ball a constant acceleration over a distance of 38 cm. What is the magnitude of the net force acting on the ball.
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The solubility of KNO3 is 155g per 100g of water at 75Cand 38.0g at 25C. What mass in grams of KNO3 will crystallize out of the solution if exactly 750g of its saturated solution at 75C is cooled to 25C.
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If equal, rigidspheres are arranged in a simple cubic lattice in the usual way,i.e., in such a way that they touch each other, what fraction of the corresponding solid will be empty space?
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