2023 · Specimen · 5054/02 | Q3

0/45parts marked · 0 of 80 marks

Question (3 of 10)7 marks · Practise this topic →

Options

You may use a calculator. You should show all your working and use appropriate units. Take the weight of 1.0 kg to be 9.8 N (acceleration of free fall = 9.8 m/s²).

(a)

A passenger in an aircraft seals some air inside a plastic bag.

Explain how the particles of air in the bag exert a pressure on the inside of the bag.

Answer guidance

Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.

[2 marks]

(b)(i)

When the bag is closed, the pressure of the air inside the aircraft is 80 kPa and the bag contains 500 cm³ of air.

When the aircraft is on the ground, the pressure of the air inside the aircraft is 100 kPa.

Calculate the volume of air inside the bag when the aircraft is on the ground.

volume = ...................................... cm³

Answer guidance

Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.

[2 marks]

(b)(ii)

State one assumption that you made in your calculation in (i).

Answer guidance

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

[1 mark]

(c)

The point plotted on the graph in Fig. 3.2 shows the initial pressure and volume of the air inside the bag.

Sketch a line on Fig. 3.2 to show how the volume of the air changes as the pressure increases.

Fig. 3.2: volume in cm³ against pressure in kPa, with the initial point marked.

Answer guidance

Draw Accuracy is being marked. Use the figure and be precise about position and labels.

[2 marks]

5054/02/SP/23Cambridge O Level Physics 5054 · Specimen 2023 · Paper 2 · Question 3