According to the U.S. Lawn Tennis Association, a tennis ball is supposed to bounce between 53 and 58 inches when it is dropped on concrete from a height of 100 inches. The concrete surface should be 4 inches thick.
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You have the freedom of speech which means you can say what you like. But we have the freedom to delete nastiness. So watch what you say ;)
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You have the freedom of speech which means you can say what you like. But we have the freedom to delete nastiness. So watch what you say ;)