A piece of radioactive material contains 1000 atmos. If its half -life is 20seconds, the time taken for 125 atoms to remain is

A car starts from rest and moves with a uniform acceleration of 30ms-2 for 20s. Calculate the distance covered at the end of the motion

An object of mass 20kg slides down an inclined plane at an angle of 30o to the horizontal. The coefficient of static friction is? [g = 10ms-2]

A rocket is fired from the earth's surface to a distant planet. By Newton's law of universal gravitation, the force F will

Calculate the total distance covered by a train before coming to rest if its initial speed is 30ms-1 with a constant retardation of 0.1m-2

An object moves in a circular path of radius 0.5m with a speed of 1ms-1 What is its angular velocity?

If a freely suspended object is pulled to one side and released, it oscillates about the point of suspension because the

In order to remove the error of parallax when talking measurements with a metre rule, the eye should be focused

A load is pulled at a uniform speed along a horizontal floor by a rope at 45 degree floor. If the force in the rope is 1500N, what is the frictional force on...