An engineer checks a sealed gas spring used in a vehicle seat. The temperature remains constant while the piston is moved between two positions in each test. The same fixed mass of gas is trapped in the gas spring throughout.
| Test | Volume at position 1 in cm3\mathrm{cm^3}cm3 | Pressure at position 1 in kPa\mathrm{kPa}kPa | Volume at position 2 in cm3\mathrm{cm^3}cm3 | Pressure at position 2 in kPa\mathrm{kPa}kPa |
|---|---|---|---|---|
| A | 45 | 240 | 72 | 150 |
| B | 80 | 135 | 60 | 180 |
| C | 54 | 200 | 36 | 280 |
| D | 90 | 120 | 40 | 270 |
The data logger has produced one inconsistent pair of measurements.
Use p1V1=p2V2p_1V_1=p_2V_2p1V1=p2V2.
Which test contains this pair?
The measurements in test A.
The measurements in test D.
The measurements in test C.
The measurements in test B.
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.