Post Utme Physics Past Questions and Answers

Question 1001:

Which of the following phenomena cannot be explained by the molecular theory of matter?

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

Question 1002:

A gas occupies a volume of \(300 cm ^{3}\) at a temperature of \(27^{\circ} C\).
What is its volume at \(54^{\circ} C\), when the pressure is constant?

A. \(150 cm ^{3} \)
B. \(273 cm ^{3}\)
C. \(327 cm ^{3}\)
D. \(600 cm ^{3}\)
E. \(125 cm ^{3}\)

Question 1003:

A man clapping his hands at regular intervals observes that the echo of a clap coincides with the next clap. If the reflecting cliff is \(160 m\) away and the speed of the sound is \(320 mS ^{-1}\), what is the frequency of the clapping?

A. 2 HzK
B. 4 Hz
C. 8 Hz
D. 1 Hz
E. 12 Hz

Question 1004:

Which of the fallowing properties is/are common to all waves?
I Diffraction
II Refraction
III Frequency

A. II only
B. I and II only
C. I, II and III only
D. I and III only
E. II only

Question 1005:

Which of the following factors affects the speed of sound in air?
I Temperature
II Pressure
III Frequency

A. II only
B. I and II only
C. I only
D. II and III only
E. III