Motion in a Plane — Physics STD 11 Science — Question

Is coefficient of performance of a refrigerator constant?

If 0-1 kg the dimension of the body is 3 cm and if the oscillation period is 2 seconds, then what will be the value of total mechanical energy?

If the absolute temperature of a gas is quadrupled, how many times will the root mean square velocity of its molecules increases? How many times will its total energy increase?

A pendulum clock gives correct time at the equator. Will it gain time or loose time as it is taken to the poles?

Person sitting in a moving bus in uniform motion fall forward when sudden break is applied. It is due to ________.

The sun is less bright at morning and evening as compared to at noon although its distance from the observer is almost the same. Why?

An observer is stationed at x = 10cm. When a train moves in the y-axis with a velocity 10m/s, what is the apparent frequency?

What is the phase difference between the displacement and velocity in a S.H.M.?