Post Utme Physics Past Questions and Answers

Question 761:

The had capacity of a calorimeter is the amount of energy required to ____________

A. Change the temperature for 1kg of the calorimeter by 1k
B. Change 1kg mass of the calorimeter to liquid at the same temperature
C. Change the temperature of the calorimeter by 1k
D. Melt the calorimeter into liquid at a constant temperature

Question 762:

Which of the following statement about latent heat of vaporization is correct? It ____________

A. Weakens the adhesive forces between molecules of a liquid and those of its container
B. Weak completely the force of attraction between the molecules of a liquid
C. Adds to the heat content of a liquid
D. Increases the cohesive forces between liquid molecules

Question 763:

When the pressure of fixed mass of gas is doubled constant temperature, the volume of the gas is increased

A. Four times
B. Double
C. Unchanged
D. Halve

Question 764:

A wavelength 0.30 travels 900m in 3.0s calculate frequency.

A. 68.0Hz
B. 225.0Hz
C. 270.0Hz
D. 1000hZ

Question 765:

Which of the following conditions is necessary for the occurrence of total internal reflection of light?

A. Light must travel from an optically less dense to a dense medium
B. The angle of incidence must be equal to the critical angle
C. The angle of incidence must be greater than the critical angle
D. The angle of reaction must be 99