Post Utme Physics Past Questions and Answers

Question 56:

A volatile liquid used for cooling purpose in refrigerator is ____________

A. Liquid ammonia
B. Cold water
C. Liquid nitrogen
D. Liquid helium

Question 57:

Complete the following statement: A temperature decrease of \(30 \mathrm{C}^{\circ}\) is equal to a temperature decrease of ____________

A. \(30 \mathrm{~F}^{\circ}\)
B. \(17 \mathrm{~F}^{\circ}\)
C. \(30 \mathrm{~K}\)
D. \(86 \mathrm{~F}^{\circ}\)

Question 58:

Complete the following statement: Bimetallic strips used as adjustable switches in electric appliances consist of metal strips that must have different

A. Mass
B. Volume
C. Length
D. Expansion coefficients

Question 59:

Heat can be transferred from one end of a metal rod in contact with heat to the other end which is in contact with heat through

A. Conduction
B. Convection
C. Radiation
D. Evaporation

Question 60:

When water is heated in a glass vessel, the level first falls and then rises because ____________

A. The apparent expansion of the water is initially small and later increases.
B. There is anomalous expansion of water.
C. The glass vessel does not expand.
D. Glass vessel expands first before water starts a more rapid expansion.