Physics Practice Test – Pressure (Solid, Liquid and Gas) Questions with Answers and Explanations

The volume of an air bubble increases from the bottom to the top of a lake at constant temperature because ______ (JAMB 1995)

A. atmospheric pressure acts on the surface of the lake
B. pressure increases with depth
C. density remains constant with pressure
D. the bubble experiences an upthrust.

In the J—tube above, Y and X are on the same horizontal level and 30 cm³ of air is trapped above Y when the atmospheric pressure is 75cm Hg. Calculate the volume of air trapped above Y when 15 cmHg is now poured into the limb above X. (JAMB 1999)

If the atmospheric pressure = 76 cmHg, the pressure of the gas in the diagram below is _______ (JAMB 2006)



A. 86 cmHg   B. 66 cmHg   C. 96 cmHg   D. 76 cmHg