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Q. Which of the following pairs of physical quantities does not have same dimensional formula ?

Physical World, Units and Measurements

Solution:

$[$ Tension $]=\left[ M L T ^{-2}\right]$
$[$ Surface Tension $]=\frac{\left[ M L T ^{-2}\right]}{[ L ]}=\left[ M L ^{0} T ^{-2}\right]$