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The pressure exerted by a phonograph needle on a record is surprisingly large. if the equivalent of 1.00 g is supported by a needle, the tip of which is a circle 0.220 mm in radius, what pressure is exerted on the record in n/m2? (you do not need to enter any units.)

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The answer is 585 mm Hg.  By using the formula P=F/A, we derive the answer  585 mm Hg.  The pressure exerted by a phonograph needle on a record is surprisingly large. if the equivalent of 1.00 g is supported by a needle, the tip of which is a circle 0.220 mm in radius, The pressure exerted on the record in n/m2 is 585 mm Hg.

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