d We know that the modulus of rigidity is defined as:
$Y =\frac{\text { Stress }}{\text { Strain }}$
Since strain is a dimensionless quantity. So its unit will be same as that of stress.
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Four students measure the height of a tower. Each student uses a different method and each measures the height many different times. The data for each are plotted below. The measurement with highest precision is
From the following combinations of physical constants $($expressed through their usual symbols$)$ the only combination, that would have the same value in different systems of units, is