The dimensions of $(\mu_0 \varepsilon_0)^{-1/2}$ are

Pressure gradient has the same dimension as that of

The wave equation is given by $Y = A \sin \omega \left( \frac{x}{v} - k \right)$,where $\omega$ is the angular velocity and $v$ is the linear velocity. What is the dimension of $k$?

$MLT^{-1}$ represents the dimensional formula of

The dimensions of the universal gravitational constant are:

Which of the following quantities can be written in $SI$ units as $kg \cdot m^2 \cdot A^{-2} \cdot s^{-3}$?