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  4. The pair(s) of physical quantities that has/have the same dimensions is(are)

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Q. The pair(s) of physical quantities that has/have the same dimensions is(are)

Physical World, Units and Measurements

Solution:

(1) Strain and coefficient of friction both are dimensionless
(2) Disintegration constant and frequency of light both have dimensions $\left[T^{-1}\right]$
(3) Heat capacity has unit cal/kg while gravitational potential has unit J/kg i.e. both have dimensions $\left[L^{2} T^{-2}\right]$.