A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the velocity of sound in air if the cliff is 680m away?

An ice cube floats in a glass of water filled to the brim. What happens when the ice melts?

mercury is a better barometric fluid than water because i. it needs no colouring ii. its density is many times greater than that of water iii. it does not we...

A palm fruit dropped to the ground from the top of a tree 45m tall. How long does it take to reach the ground? (g = 10ms-2)

A man walks 1km due east and then 1km due north. His displacement is

A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms-1. The recoil speed of the machine gun is

An air force jet flying with a speed of 335ms-1 went past an anti-aircraft gun. How far is the aircraft 5s later when the gun was fired?

A piece of rubber 10cm long stretches 6mm when a load of 100N is hung from it. What is the strain?

The factional force between two bodies