A cyclist doubles his speed. How will his kinetic energy change : increases, decreases or remains the same ?

The kinetic energy of the molecules increases with increase in:

The figure shows the snapshot of a sound wave in a certain medium at a certain instant. If a wave of same type but with higher frequency is passed in the given medium, will the speed of the wave increase, decrease or remain the same?

A lift is accelerated upward Will the apparent weight of a person inside the lift increase , decrease or remain the same relative to its real weight ? If the lift is going with unifrom speed then ?

If kinetic energy of a body is increasing then.

Two plane mirrors are placed making an angle theta^@ in between them. For an object placed in between the mirrors, if angle is gradually increased from 0^@ to 180^@ , how will the number of images change: increase, decrease or remain unchanged?

When mass and speed of a body is doubled the kinetic energy increases

If the speed of a car is halved, how does its kinetic energy change?

If radius of earth is increased, without chage in its mass, will the length of day increase, decrease or remain same?

A force vecF=(3xN)hati+(4N)hatj , with x in meter, acts on a particle, changing only the kinetic energy of the particle. How mcuh work is done on the particle as it moves from coordinates (2m, 3m, 5m) to (3m, 0m, 6m) ? Does the speed of the particle increase, decrease, or remain the same?

Will the kinetic energy of molecules increase, decrease or remain same if : (i) the temperature is increased ? (ii) the pressure is decreased ? (iii) the volume is decreased ?