A technician compares two designs of vibration-isolation mount. Each mount contains the same fixed mass of air inside sealed bellows. The bellows has a flat top plate that moves vertically as the folding sides are compressed.
The technician changes the volume of the air slowly, so its temperature remains constant.
The pressure-volume data for the air in either design are shown in the table.
| Volume of air in cm3\mathrm{cm^3}cm3 | Pressure of air in kPa\mathrm{kPa}kPa |
|---|---|
| 600 | 100 |
| 500 | 120 |
| 400 | 150 |
| 300 | 200 |
Explain how the measurements show that the pressure of the air is inversely proportional to its volume.
In design X, the volume of air is 500 cm3 and the area of the top plate is 0.018 m2.
In design Y, the volume of air is 300 cm3 and the area of the top plate is 0.0090 m2.
Calculate the force exerted by the air on each top plate and compare the forces.
108 exam-style questions on Edexcel GCSE Physics 14.3 Gas pressure and temperature, covering 14.3.1 Gas pressure and particle motion, 14.3.2 Temperature and pressure at constant volume, 14.3.3 Absolute zero and the kelvin scale, 14.3.4 Compressing and expanding gases, 14.3.5 Volume and pressure at constant temperature, and 14.3.6 Doing work on a gas. Each one has a worked solution and a mark scheme showing where the marks go.