The dimensional formula ${M^0}{L^2}{T^{ - 2}}$ stands for

The $SI$ unit of a physical quantity is pascal-second. The dimensional formula of this quantity will be ..............

If $C$ and $R$ represent capacitance and resistance respectively,then the dimensions of $RC$ are

What is the spring constant of a spring? Write its unit and dimensional formula.

Turpentine oil is flowing through a tube of length $l$ and radius $r$. The pressure difference between the two ends of the tube is $P$. The viscosity of oil is given by $\eta = \frac{P(r^2 - x^2)}{4vl}$,where $v$ is the velocity of oil at a distance $x$ from the axis of the tube. The dimensions of $\eta$ are

Write the dimensional formula of $\frac{GM_e}{gr^2}$.