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2296
Which of the following materials is used to control the rate of neutron production in a nuclear reactor?
  • A. boron rods
  • B. concrete shield
  • C. graphite rods
  • D. uranium rods
View Answer & Discuss (3) WAEC 2002
2297
A nuclide X is produced by bombarding a nitrogen(N) nucleus with an alpha(\alpha\) particle with the release of heavy hydrogen(D) nucleus as shown by the following nuclear equation, \(\alpha + ^{14}_{7}N \to ^p_qX + ^2_1D\). Determine the values of p and q in the equation
  • A. 12 and 6
  • B. 14 and 7
  • C. 16 and 8
  • D. 19 and 8
View Answer & Discuss (3) WAEC 2002
2298
A tuber of cassava can be processed into powder. This explains the face that
  • A. matter can change sponteneously from one state to another
  • B. matter cannot be destroyed
  • C. force is required to change natter from one state to another
  • D. matter is made up of tiny particle
View Answer & Discuss WAEC 2003
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2299

A piece of metal of relative density 5.0 weighs 60N in air. Calculate its weight when fully immersed in water

  • A. 4N
  • B. 5N
  • C. 48N
  • D. 60N
View Answer & Discuss (6) WAEC 2003
2300

The tendency of a body to remain at rest when a force is supplied to it is called

  • A. impulse
  • B. momentum
  • C. inertia
  • D. friction
View Answer & Discuss (3) WAEC 2003
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