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Sunday, 21 June 2026
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Physics Past Questions and Answers

Topic: using the theory to explain:

Jamb Physics Questions - using the theory to explain:

Question 31:
Which of the following statements give the TRUE difference between evaporation and boiling? i. Evaporation occurs at all temperatures while boiling occurs at a fixed temperature for a given pressure. ii. Evaporation is a surface phenomenon while boiling is an interior phenomenon. iii. Evaporation is affected by surface area while boiling is not.
  • A I and ii only
  • B I and iii only
  • C Ii and iii only
  • D I, ii, iii.
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Question 32:
Before starting a journey, the tyre pressure of a car was 3 x 105Nm-2 at 27oC. At the end of the journey, the pressure rose to 4 x 105Nm-2. Calculate the temperature of the tyre after the journey, assuming the volume is constant
  • A 400<sup style='font-size: smaller;'>o</sup>C
  • B 300<sup style='font-size: smaller;'>o</sup>C
  • C 273<sup style='font-size: smaller;'>o</sup>C
  • D 127<sup style='font-size: smaller;'>o</sup>C
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Question 33:
What happens when a gas expands at constant temperature?
  • A Its pressure decreases
  • B The total momentum of its molecules remains constant
  • C Its pressure decreases and the total momentum of its moleculees remains constant
  • D Its pressure decreses and the total kinetic energy of its molecule decreases
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Question 34:
A bullet fired at a wooden block of thickness 0.15m manages to penetrate the block. If the mass of the bullet is 0.025kg and the average resisting force of the wood is 7.5 x 103N, calculate the speed of the bullet just before it hits the wooden block.
  • A 450ms<sup style='font-size: smaller;'>-1</sup>
  • B 400ms<sup style='font-size: smaller;'>-1</sup>
  • C 300ms<sup style='font-size: smaller;'>-1</sup>
  • D 250ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 35:
A bullet fired at a wooden block of thickness 0.15m manages to penetrate the block. If the mass of the bullet is 0.025kg and the average resisting force of the wood is 7.5 x 103N, calculate the speed of the bullet just before it hits the wooden block.
  • A 450ms<sup style='font-size: smaller;'>-1</sup>
  • B 400ms<sup style='font-size: smaller;'>-1</sup>
  • C 300ms<sup style='font-size: smaller;'>-1</sup>
  • D 250ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation