A student seals the nozzle of a syringe containing a fixed mass of air and submerges it in a large water bath maintained at a constant temperature, as shown in the diagram.
The student slowly pushes the plunger inwards, reducing the volume occupied by the air.
Which row in the table correctly describes the changes to the pressure of the air and the mean kinetic energy of the air molecules?
| Pressure of the air | Mean kinetic energy of the air molecules | |
|---|---|---|
| A | Decreases | Decreases |
| B | Increases | Remains constant |
| C | Decreases | Remains constant |
| D | Increases | Increases |
Row A
Row B
Row C
Row D