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Physics Past Questions and Answers

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Physics Questions

Question 3096:

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

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

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Question 3097:

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

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A Increased four times
B Doubled
C Unchangeable
D Halved

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Question 3098:

The volume of a given mass of an ideal gas at 327k and 9.52 x 10⁴ Pa is 40cm³. calculate the volume of the gas at 273k and 1.034 x 10⁵Pa.

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A 68.23cm³
B 47.91cm³
C 44.60cm³
D 30.75cm³

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Question 3099:

A wave of weight length 0.30m travels 900m in 3.0s, calculate its frequency

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A 68.0Hz
B 225.0Hz
C 1000Hz
D 750.0Hz

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Question 3100:

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

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A Light must travel from an optical less dense to a denser 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 refraction must be 90^o

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