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WAEC Physics 2012 Paper

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Question : 2

Total: 47

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?

frequency of collision of trapped air molecules with walls of the syringe is more
molecules of trapped air expands more
speed of the trapped air molecules decreases
number of molecules of trapped air increases

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