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

A rubber balloon is given a charge Q distributed uniformly over its surface. Is the field inside the balloon zero everywhere if the balloon does not have a spherical surface?

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative: Work done by an applied force on a body moving on a rough horizontal plane with uniform velocity.

Is centre of mass same as the centre of gravity of a body? How can a rigid body be balanced?

If x = a + bt + ct², where x is in meters, t is in seconds then what will be the unit of c?

Why does a heavy rifle not kick as strongly as a light rifle using the same cartridges?

What is the effect on the direction of the centripetal force when the revolving body reverses its direction of motion?

Does the boiling point of water change with pressure?

If the number of molecules in a vessel is halved. What will be the change in pressure?

If the earth is regarded as a hollow sphere, then what is the weight of an object below surface of the earth?