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381

Which of the following particles/rays do not originate from the nucleus of an atom?

  • A. Alpha particles
  • B. Beta particles
  • C. Neutrons
  • D. Gamma rays
  • E. X-rays
View Answer & Discuss (13) WAEC 1996
382

The count rate of an alpha-particle source is 400 per minute. If the half-life of the source is 5 days, what would be the count rate per minute after 15 days?

  • A. 20
  • B. 25
  • C. 50
  • D. 200
  • E. 400
View Answer & Discuss (3) WAEC 1996
383
The force between molecules of the same substance is termed
  • A. elastic force
  • B. repulsive force
  • C. cohesive force
  • D. adhesive force
View Answer & Discuss (1) WAEC 1999
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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384
A net force of magnitude 0.6N acts on a body of mass 40g, initially at rest. Calculate the magnitude of tire resulting acceleration.
  • A. 90ms-2
  • B. 60ms-2
  • C. 30ms-2
  • D. 15ms-2.
View Answer & Discuss (5) WAEC 1999
385
Palm oil from a bottle flows out more easily after it as been heated because the
  • A. molecules are given potential energy during the heating
  • B. friction between oil layers is reduced
  • C. oil molecules force each other out
  • D. adhesion between the oil molecules and those of the bottle is increased
View Answer & Discuss (1) WAEC 1999
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