The physical quantity which has the dimensional formula ${M^1}{T^{ - 3}}$ is
A
Surface tension
B
Solar constant
C
Density
D
Compressibility
Diffcult
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B
Solar constant
b (b) Solar constant is energy received per unit area per unit time i.e. $\frac{{[M{L^2}{T^{ - 2}}]}}{{[{L^2}]\;[T]}} = [{M^1}{T^{ - 3}}]$
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