Explain the concept of mass, length and time. Why mass, length and time are called fundamental quantites.

Assertion (A): Temperature is a fundamental quantity in SI system. Reason (R ): In other systems of measurement only mass, length and time are fundamental quantities.

How do we measure the standard international unit for mass, length and time? Also explain why they are also called fundamental units?

Why are length, mass and time chosen as fundamental quantites in mechanics ?

Statement-1 : The size (u) of the unit of physical quantity and its numercial magnitude (n) are related to each other by the relation nu= constant Statement-2 : The choice of mass, length and time as fundamental quantities is not unique.

If Planck's constant (h) and speed of light in vacuum (c ) are taken as two fundamental quantites, which on of the following can, in addition, be taken to express length, mass and time in terms of the three chosen fundamental quantities ?

If the unit of mass , length and the time are doubled then unit of angular momentum will be

Find the dimensions of resistance in terms of mass, length, time and current.

The dimensions of potential energy of an object in mass, length and time are respectively