PART - 2 CH - 11 Thermodynamics — Physics STD 11 Science — Question

The value of force impulse will be equal to which quantity? Write its formula.

A body is acted upon by a number of external forces. Can it remain at rest?

Answer the following: The casing of a rocket in flight burns up due to friction. At whose expense is the heat energy required for burning obtained? The rocket or the atmosphere?

Why machines are sometimes jammed in winter?

Give an example of:
A constant which has no unit.

If we use water instead of mercury in a barometer, what will be the height of water?

Explain why (or how):
Solids can support both longitudinal and transverse waves, but only longitudinal waves can propagate in gases,

A ball is moved on a horizontal table with some velocity. The ball stops after moving some distance. Which external force is responsible for the change in the momentum of the ball?

An AC source is connected to a capacitor. Will the rms current increase, decrease or remain constant if a dielectric slab is inserted into the capacitor?

Give the dimensional formula of 'g' and 'G'.