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(answer updated to address question details as I didn't fully answer the question before) The principle behind the aerodynamics of golf balls is called boundary layer separation. Boundary Layers A boundary layer is the layer of fluid close to a ...
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My aim of this investigation is to find out the efficiency of a golf ball, netball, ping pong ball, rubber ball, tennis ball and a baseball on their first bounce from a 90cm high drop.
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Mill (grinding) - Wikipedia
Ball mill. A typical type of fine grinder is the ball mill. A slightly inclined or horizontal rotating cylinder is partially filled with balls, usually stone or metal, which grind material to the necessary fineness by friction and impact with the tumbling balls.
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