A scientist investigates the relationship between the pressure and volume of a gas.
The results from the experiment are shown in the table below:
| Pressure (kPa\text{kPa}kPa) | Volume (cm3\text{cm}^3cm3) |
|---|---|
| 200 | 600 |
| 300 | 400 |
| 400 | 300 |
| 600 | 200 |
| 800 | 150 |
Explain how these results show that pressure×volume=constant\text{pressure} \times \text{volume} = \text{constant}pressure×volume=constant. Use calculations in your answer.
When plotting these results on a grid with Pressure on the horizontal axis and Volume on the vertical axis, one point is missing. State the coordinates of the missing point on the graph if the pressure is 400 kPa400\text{ kPa}400 kPa.
Describe the type of line of best fit that should be drawn through these plotted points.
Use the constant value established in part (a) to find the volume of the gas when the pressure is 500 kPa500\text{ kPa}500 kPa.
Explain how and why pressure changes with depth below the surface of the ocean.
33 exam-style questions on OCR GCSE Physics Pressure. Each one has a worked solution and a mark scheme showing where the marks go.