The earth takes 24 h to rotate once about its axis. How much time does the sun take to shift by `1^@` when viewed from the earth?

How much time does light take to react us from Alpha centuri.

Earth rotates about its axis in _______ direction.

Amit took 3/4 hour to paint a table and 1/3 hour to paint a chair .How much time did he take in all?

A hundred metre sprinter increases her speed from rest unifromly at the rate of 1ms^-2 upto three-quarters of the total run and covers the last quarter with unifrom speed. How much time does she take to cover the first half, the second of the run?

A LASER is a source of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited to measure long distances. The distance of the Moon from the Earth has been already determined very precisely using a laser as a source of light. A laser light beamed at the Moon takes 2.56 s to return after reflection at the Moon’s surface. How much is the radius of the lunar orbit around the Earth ?

An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20^(@)C ? The temperature of boiling water is 100^(@)C

A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m s^-1 . How much time does the ball take to return to his hands? If the lift starts moving up with a uniform speed of 5 m s^-1 and the boy again throws the ball up with the maximum speed he can, how long does the ball take to return to his hands ?