Air inside a sealed syringe is compressed gradually by pushing the piston in. Its temperature remains unchanged. Which statement about the air is correct?
- AThe pressure of the air decreases because its molecules now travel more slowly.
- BThe pressure of the air decreases because the area of the syringe walls is now smaller.
- CThe pressure of the air increases because its molecules now hit the syringe walls more frequently.
- DThe pressure of the air increases because its molecules now travel more quickly.