Question 17
PressureThe volume of an air bubble increases from the bottom to the top of a lake at constant temperature because
- A.atmospheric pressure acts on the surface of the lake
- B.pressure increases with depth
- C.density remains constant with pressure depth
- D.the bubble experiences an upthrust
Show the answer and explanation
Answer: B (pressure increases with depth)
Explanation
Pressure is greatest at the bottom and falls as the bubble rises. By Boyle's law, lower pressure at constant temperature means larger volume.