Thermal physics

The graph shows how the temperature of the substance changes with time.

• gas condensing

• gas cooling

• liquid cooling

• liquid solidifying

What is meant by the fixed points of the scale of a liquid-in-glass thermometer?

• the distance between one scale division and the next

• the maximum and minimum depth to which the thermometer should be submerged in a liquid

• the two agreed temperatures used for marking the temperature scale

• the highest and lowest temperatures that the thermometer can record

Which quantity gives the thermal capacity of a beaker?

• the thermal energy required to raise the temperature of the beaker by 1°C

• the total volume of hot liquid that the beaker can hold

• the total mass of hot liquid that the beaker can hold

• the thermal energy required to change the state of the beaker at constant temperature

The table lists the melting points and the boiling points of four different substances. Which substance is a liquid at 0°C?

• A

• B

• C

• D

A long thin bar of copper is heated evenly along its length.

• It becomes less heavy.

• It becomes longer.

• It becomes shorter.

• It bends at the ends.

A solid object has a very large thermal capacity. What does this mean?

• A large amount of energy is needed to make the object become hot.

• A large amount of energy is needed to make the object melt.

• A small amount of energy is needed to make the object become hot.

• A small amount of energy is needed to make the object melt.

Which statement about evaporation is correct?

• Evaporation causes the temperature of the remaining liquid to decrease.

• Evaporation does not occur from a cold liquid near its freezing point.

• Evaporation does not occur from a dense liquid, such as mercury.

• Evaporation occurs from all parts of a liquid.

Which statement describes what happens as ice at 0°C starts to melt to become water?

• Energy is absorbed and the temperature remains constant.

• Energy is absorbed and the temperature rises.

• Energy is released and the temperature remains constant.

• Energy is released and the temperature rises.

What is Conduction?

• When you heat fluid particles gain energy, so they move more and spread out.

• particles are very close together, so they can transfer heat energy as they vibrate.

• The particles between the Sun and the earth travel by conduction

• the steady flow between the warm and cool sections of a fluid, such as air or water.

Which expression gives the specific heat capacity

• B

• A

• C

• D