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OpenStudy (anonymous):
A calorie is a unit of heat or energy and it is equal to about 4.2J where 1J=1ksm^2s^-2.Suppose we employ a system of units in which the unit of mass equals skg,the unit of lenght =rm,the unit of time=gs.show that a calorie has a magnitude 4.2 s^-1r^-2g^2.
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