An engineer investigates the physical properties of four gas samples stored in canisters, labelled A, B, C, and D.
The table below shows the pressure and volume measurements recorded:
| Canister | Pressure (Pa) | Volume (m3m^3m3) |
|---|---|---|
| A | 12 000 | 0.050 |
| B | 15 000 | 0.030 |
| C | 24 000 | 0.025 |
| D | 32 000 | 0.015 |
Two of these readings are for the same mass of the same gas at a constant temperature.
Identify which two canisters contain the same mass of the same gas at a constant temperature.
Show calculations to support your answer.
The engineer then investigates another gas canister where the volume of the gas is kept constant.
Explain, using ideas about particles, how increasing the temperature affects the pressure of this gas.
A diving training pool is filled with a saline solution of density 1050 kg/m31050 \text{ kg/m}^31050 kg/m3.
Calculate the pressure exerted by the liquid at a depth of 4.5 m4.5 \text{ m}4.5 m.
(Take the gravitational field strength, g=9.8 N/kgg = 9.8 \text{ N/kg}g=9.8 N/kg.)