Which of the following has the dimensional formula $[M^0L^0T^0]$?

Which quantity has the same dimensional formula as force times distance?

The ratio of the area of a portion of a sphere's surface to the square of its radius has the same dimensions as which of the following?

IF R and L represents resistance and inductance respectively, which of the following combination has the dimensions of frequency

The SI unit of solid angle is:

The thrust developed by a rocket-motor is given by $F = mv + A\left( {{p_1} - {p_2}} \right)$, where m is the mass of the gas ejected per unit time, $v$ is velocity of the gas, A is area of cross-section of the nozzle, ${p_1}.{p_2}$ are the pressures of the exhaust gas and surrounding atmosphere. The formula is dimensionally

Joule – Second is the unit of

Plane angle and solid angle have:

Dimensions of $\frac{1}{{{{\rm{\mu }}_0}{{\rm{\varepsilon }}_0}}}$, where symbols have their usual meanings, are

The ratio of the length of an arc of a circle to its radius is a measure of:

$\left[ {{\rm{M}}{{\rm{L}}^2}{{\rm{T}}^{ - 2}}} \right]$ are dimensions of