The inner diameter of a small test tube can be measured accurately using a
A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?
When an atom loses or gain a charge it becomes
A ball of mass 800g moving horizontally with a speed of 5m/s hits a vertical wall and rebounds with the same speed. The impulse experienced by the ball is?
The force between the molecules of a liquid in contact with that of a solid is?
