Thermal Properties & Temperature (Cambridge O Level Physics)

Wooden barrels are often reinforced by putting tight iron rings around them.

What procedure would make it easier to get the iron ring onto the barrel?

In order to calibrate a degrees Celsius thermometer, the lowest fixed point can be found by placing the thermometer in:

An iron cube is heated by a Bunsen burner.

Which of its properties decreases?

A National Grid engineer connects an electrical cable between two pylons.

The cable is a bit too tight.

What could happen to the wire if the weather became very cold, and why?

Internal energy is affected by two properties of the particles which make up a substance. 

Identify the two properties.

Below are four statements about evaporation. One of them is correct.

Which statement is correct?

A person cannot open a glass jar which has a metal lid. 

After the lid is held under hot water for a few seconds, the jar opens easily.

What is the explanation for this?

The more energetic particles escape from the surface of a liquid.

Which term describes this process?

The diagram shows a clinical thermometer. 

Which factor affects the sensitivity of the thermometer?

Which row is correct for a thermocouple thermometer?

What is the heat capacity of a body? 

Which statement about water is correct?

Drinks are often cooled by putting ice cubes into them.

A delicious cocktail is initially at a temperature of 12°C, when a few ice cubes are put into the drink.

After some time has passed, some of the ice has melted, and the temperature of the cocktail has dropped to 7°C.

What is the temperature of the remaining, unmelted ice?

A pan, containing 0.750 kg of water which is initially at 13°C is heated by an electric hob. 35 kJ of thermal energy is put into the water and its temperature rises.

You can assume that all the energy supplied by the hob goes into raising the temperature of the water.

The specific heat capacity of water is 4200 J/kg°C.

To the nearest °C, what is the final temperature of the water?

Two beakers, X and Y, containing different liquids are heated by a student.

Both beakers contain the same mass of liquid, and are heated using the same heater set to the same power.

The graph shows how the temperature of each liquid changes with time.

What conclusion can be correctly drawn from the graph?

Two metal cylinders, P and Q, are heated using an electric heater. Both of the cylinders receive exactly the same amount of thermal energy.

The temperature of P increases by a smaller amount than the temperature of Q.

What conclusion can be drawn?

A student takes two blocks, block 1 and block 2, made from different metals and heats them until the temperature of both has risen by 20°C.

Both blocks are left on the desk to cool.

Block 2 has a greater thermal capacity than block 1.

Which of the blocks loses more energy as it cools to room temperature, and which of the blocks requires more energy to raise its temperature by 20°C?

The water in outdoor swimming pools gradually evaporates.

How does the process of evaporation affect the temperature of the water in the swimming pool and what is the effect on the average kinetic energy of the water molecules?