The ratio of the dimensions of Planck's constant and that of moment of inertia has the dimensions of
angular momentum
time
velocity
frequency
D.
frequency
We know that, energy of an emtted particle
A body of the mass 50 kg is suspended using a spring balance inside a lift at rest. If the lift starts falling freely, the reading of the spring balance is
< 50 kg
= 50 kg
> 50 kg
= 0
D.
= 0
Given,
Mass of the body, m = 50 kg
When lift is moving down,
If lift starts freely, then
Now, scale reading =
If energy (E), velocity (v) and time (T) are chosen as the fundamental quantities, the dimensional formula of surface tension will be
[Ev-2T-1]
[Ev-1T-2]
[Ev-2T-2]
[Ev-2T-2]
C.
[Ev-2T-2]
A substance of mass 49.53 g occupies 1.5 cm3 of volume. The density of the substance (in g cm-3) with correct number of significant figures is
3.3
3300
3302
33.0
D.
33.0
Mass of the substances (m) = 49.53 g
Volume (V) = 1.5 cm3
We know that,