Post Utme Physics Past Questions and Answers

Question 816:

Which of the following]is NOT a vector quantity

A. Force
B. Altitude
C. Weight
D. Displacement
E. Acceleration
CHEMISTRY

Question 817:

Which of the following statements about friction it NOT correct?

A. The force of kinetic friction is less thanthe force of static frictlon
B. The force of kinetlc friction between two surface is Independent of the areas in contact provided the normal reactlon is unchanged
C. The force of sliding friction between two surface is less than the force. of sliding friction
D. The angle of friction is the angle between the normal reaction and the force friction
E. Friction may be reduced by lubrication

Question 818:

A ship travelling towards a cllff recelved the echo of its whistle after \(3.5\) seconds. A short while later recelved the echo after \(2.5\) seconds. If the speed of sound in air under the prevailing conditions is \(250 \mathrm{~ms}\), how much closer is the ship to the cliff.

A. \(10 \mathrm{~m}\)
B. \(125 \mathrm{~m}\)
C. \(175 \mathrm{~m}\)
D. \(350 \mathrm{~m}\)
E. \(1,000 \mathrm{~m}\)

Question 819:

Which of the following is NOT correct?
I. The pltch of a sound note depends on the frequency of vibrations
II. The intensity of a sound note is proportional to the amplitude of vibrations
III. Beats are produces by two sources of sound because one wave is traveling faster than the other
IV. When two sources of sound of frequencies \(500 \mathrm{~Hz}\) and \(50 \mathrm{~Hz}\) are sounded together, a neat frequency of \(2 \mathrm{~Hz}\) id observed
V. The first harmonic of a note has double the frequency of the fundamental note

A. I and II
B. II and III
C. I and II
D. III and IV
E. IV and V

Question 820:

Which of the following statements about defects of vision is/are CORRECT
I. For a long-sighted person, close objects appear blurred
II. For a short-sighted person, distant objects appeared blurred
III. Short sighted is corrected by using a pair of converging lenses

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