Air is enclosed in a cylinder by a piston. The piston is forced inward. The air’s volume decreases. The air’s temperature remains unchanged. Which row shows how the average speed of the air molecules and the average distance between them change?
- Aaverage speed of molecules: increases; average distance between molecules: decreases
- Baverage speed of molecules: increases; average distance between molecules: unchanged
- Caverage speed of molecules: unchanged; average distance between molecules: decreases
- Daverage speed of molecules: unchanged; average distance between molecules: increases