Equal masses of two different liquids are put into identical beakers.

Liquid 1 is heated for 100 s and liquid 2 is heated for 200 s by heaters of the same power.

The temperature of both liquids increases by the same amount.

Which statement is correct?

Which process involves convection?

The air in a room is heated by a heater. The diagram shows the circulation of the air in the room. Which statement about the air that is heated is correct?

What is the name of the process of heat transfer using electromagnetic waves?

Two states of matter are described as follows.

In state 1, the molecules are very far apart. They move about very quickly at random in straight lines until they hit something.

In state 2, the molecules are quite closely packed together. They move about at random. They do not have fixed positions.

What is state 1 and what is state 2?

The diagram represents molecules of gas moving in a container. What happens to the gas molecules when the temperature of the gas increases?

A sealed gas cylinder is left outside on a hot, sunny day.

What happens to the average speed of the molecules and to the pressure of the gas in the

cylinder as the temperature rises?

The diagrams represent the molecules in two different states of matter. The arrows show the motion of the molecules. What is state 1 and what is state 2?

A helium filled weather balloon is held at ground. The volume of balloon is 3600 . The pressure of helium is 100 kPa. The balloon is released and rise to height where the volume of the balloon is 7200 . Calculate the new pressure of helium. (Assume temperature is constant).

To mark a temperature scale on a thermometer, standard temperatures known as fixed points are needed.

Which of these is a fixed point on the Celsius scale?

The thermal capacity of solid Y is greater than that of solid Z.

What is a consequence of this?

A rod is made of copper and wood joined together. The rod is heated at the join in the centre for about a minute.

At which labelled point will the temperature be lowest, and at which point will it be highest?

The same quantity of thermal (heat) energy is given to two objects X and Y. The temperature rise of object X is less than the temperature rise of object Y.

What accounts for this difference?

The following are the ways to increase the sensitivity of thermometer, except

The quantity of heat needed to change unit mass from liquid to vapour without change of temperature is called _________

Take a look of the following graph!

What is happening in (B) ?

The movement of tiny grains of dust because it collides with fast moving air particles is called?

When a hot object get in contact with cold object the temperature of both object will become same. What is the term for this equilibrium?

Rail ways bar is always placed with some gap between them. What is the reason of this?

It takes 4000 J to turn 8 g of water at 100°C into steam. Calculate the specific latent heat of vaporation of water?

The diagram shows a quantity of gas trapped in a cylinder. The piston is pushed in slowly and the gas is compressed. The temperature of the gas does not change. Which graph shows the relationship between the pressure and the volume of the gas?

The diagram shows a sealed jar containing a gas. Which statement about the gas in the jar is correct?

Change the upper and lower fixed point is called _________.

Change in length or volume per degree is called ____________.

What the following is the unit for specific latent heat?

Inside a thermometer there is liquid. What is the name of that liquid?