The diagram illustrates a cylinder that contains air. The piston can move freely within the cylinder, and atmospheric pressure acts on the outside of the cylinder. When the air inside the cylinder is heated, the piston shifts to the right. Which quantity decreases?
- Athe average force exerted on the piston each time that one air particle hits the piston
- Bthe average speed of the air particles
- Cthe mass of air inside the cylinder
- Dthe number of collisions made by air particles with the piston in one second