Strips of two metals A and B are firmly jointed together as shown in the figure.
On heating, A expands more than B does. If this jointed strip is heated, then it will appear as

A ball is dropped from the top of a high building with a constant acceleration of 9.8 m/s2. What will be its velocity after 2s ?

A smooth plane inclined at an angle 0 with the horizontal is shown in the given figure. A body starts from rest and slides down on the inclined surface. The time taken by the body to reach the bottom is

Assertion (A) : The temperature of a metal wire rises when an electric current is passed through it.Reason (R) : Collision of metal atoms with each other releases heat energy.

What is the approximate mean velocity with which the earth moves round the sun in its orbit?

The following processes take place during the launch of a rocket.
What is the proper order in which they take place?
1.Rocket fuel is burnt
2.Gases are produced
3.Rocket moves in the forward direction
4.Gases come out with momentum in backward direction

Which one of the following is present in the largest amount in terms of per cent by mass in the earth's crust?

One astronomical unit is the average distance between:

A girl is swinging on a swing in sitting position. When the girl stands up, the period of swing will

The working principle of a washing machine is