Thermal Properties of Matter — Physics STD 11 Science — Question

Answer carefully, with reasons:
What are the answers to (a) and (b) for an inelastic collision?

Name three physical properties which can have different values in different directions.

A ladder is at rest with its upper end against a wall and the lower end on the ground. Is the ladder more likely to slip, when a man stands on it at the bottom or at the top? Give reason.

Choose the correct alternative:
Acceleration due to gravity increases/ decreases with increasing altitude.

Name three factors affecting the energy radiated by a hot body.

On what does the pressure of a liquid depend?

Water is flowing through a pipe of non- uniform area of cross-section. The velocity of water at point A is four time the velocity of water at another point B. What would be the diameter of the pipe at point A relative to point B?

Which blood pressure is more : systolic pressure or diastolic pressure?

An object is moving on a frictionless horizontal plane. Is there any force acting on it in the following conditions when the body (1) is moving with same velocity (ii) is moving with the same speed?

What will be the ratio of the velocity of efflux from two holes made with a separation (H - 2h) in a container holding liquid of height 'H' and one hole at a depth ‘h' from its bottom? Give reason.