PART - 1 CH - 4 Laws of Motion — Physics STD 11 Science — Question

In summer, when the valve of a bicycle tube is removed, the escaping air appears cold. Why?

The displacement-time graph for two particles X and Y are straight lines making angles of 30° and 60° with the time axis. What is the ratio of the velocities of Y and X?

What is the nature of thermal changes in air, when a sound wave propagates through it?

Can the center of mass of an object be outside?

Which change is the solidification of wax?

Two astronauts on the surface of moon cannot talk to each other. Why?

What happens when two identical objects moving in mutually opposite directions suffer an elastic collision?

Maximum static friction acting on body is known as _______.

What happens to surface tension, when impurity is mixed in liquid?

Write the use of Wien's displacement law.