Dimensional formula of Stefan’s constant is

What are the units of $K = 1/4\pi {\varepsilon _0}$

Select the pair whose dimensions are same

In the equation ${S_{nth}}$ the $= u + \frac{a}{2}\left( {2n - 1} \right),$ the letters have their usual meanings. The dimensional formula of ${S_{nth}}$ is

The ratio of SI. Unit of the CGS unit of Planck’s constant is

The physical quantity angular momentum has the same dimensions as that of

The dimensions of universal gravitational constant are

A protein molecule's diameter is measured as 42 Å using X-ray diffraction. If another measurement instrument gives the diameter in picometers (pm), and the ratio of the two measurements is $\frac{x}{10}$, what is the value of $x$?

$\left[ {{\rm{M}}{{\rm{L}}^{ - 2}}{{\rm{T}}^{ - 2}}} \right]$ represents dimensional formula of which of the following physical quantities?

The physical quantity which has the dimensional formula $\left[ {{{\rm{M}}^1}{{\rm{T}}^{ - 3}}} \right]$ is

The dimensions of couple are