A piston encloses a mass of gas in a cylinder. At the start, the piston is positioned halfway along the cylinder’s length. The piston is then pushed towards the cylinder’s open end. The gas temperature stays constant. What happens to the gas density and the gas pressure when the piston is moved?
- Adensity decreases, pressure decreases
- Bdensity decreases, pressure unchanged
- Cdensity increases, pressure decreases
- Ddensity increases, pressure unchanged