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A centrifuge is a machine designed for the specific purpose of subjecting materi

ID: 2860997 • Letter: A

Question

A centrifuge is a machine designed for the specific purpose of subjecting materials to a sustained centrifugal force. The actual amount of centrifugal force, F, expressed in dynes (1 gram of force=980 dynes) is given below, where S is in revolutions per minute (rpm), M is in grams, and R is in centimeters. An object revolving at the rate of 700 rpm in a circle with radius of 14 cm generates a centrifugal force that is approximately how many times that of gravity? (Round your answer to the nearest whole number.) F=f(M, S, R)=pi^2S^2MR/900

Explanation / Answer

put all the given values in given formula.

F=pi^2*M*S^2*R/900

S=700 R=14 M=1 g (assume)

F=7.52*10^4 dyne

F due to gravity= Mg=980 dyne

ratio= 7.52*10^4/980=76.76

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