64
The diagram above illustrates trapped air in a syringe placed in water that is gradually heated. It is observed that the piston rises as the temperature of the water rises. Which of the following statements explains this observation?
- A. frequency of collision of trapped air molecules with walls of the syringe is more
- B. molecules of trapped air expands more
- C. speed of the trapped air molecules decreases
- D. number of molecules of trapped air increases
65
The derived unit of pressure can be expressed as
- A. kgms-2
- B. kg m-1s-2
- C. kg m-2s-2
- D. kg m-1s2