A sealed yet empty (except for air) plastic drinks bottle is left outside in the sunshine…

Physics · IGCSE · Cambridge (CIE)Thermal physics

A sealed yet empty (except for air) plastic drinks bottle is left outside in the sunshine on a warm day.

Which row of the table correctly describes what happens to the average speed of the air molecules, and to the pressure inside the bottle?

Average speed of particles

Pressure inside bottle

A

increases

increases

B

increases

decreases

C

decreases

increases

D

decreases

decreases

  1. A

  2. B

  3. C

  4. D

Answer

(A) A

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