The dimensions of calorie are

The dimensions of the universal gravitational constant are:

Write the dimensional formula for impulse of a force.

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$ : Product of Pressure $(P)$ and time $(t)$ has the same dimension as that of coefficient of viscosity.
Reason $R$ : Coefficient of viscosity $= \frac{\text{Force}}{\text{Area} \times \text{Velocity gradient}}$
Choose the correct answer from the options given below.

Pressure gradient has the same dimension as that of

Identify the pair of physical quantities that have the same dimensions.