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Physics 2016 WAEC Past Questions

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21
Which of the following statements is correct about the effect of dissolved salt on the freezing point of water?
  • A. the freezing point is lowered
  • B. the freezing point is increased
  • C. there is no change in the freezing point
  • D. the change in the freezing point depends on the temperature of the surrounding
View Answer & Discuss WAEC 2016
22
A pressurized perfume bottle is left on the window pane of a room. What happens to he gas molecules of the perfume on a sunny day? They
  • A. expand
  • B. collide less often
  • C. move more rapidly
  • D. contract
View Answer & Discuss (1) WAEC 2016
23
Given that v, f and \(\lambda\) are the velocity, frequency and wavelength of a wave respectively. Which of the following equations is correct?
  • A. v = f2\(\lambda\)
  • B. f = \(\frac{v}{\lambda}\)
  • C. f = \(\frac{v}{\lambda^2}\)
  • D. \(\lambda = \frac{f}{v^2}\)
View Answer & Discuss (1) WAEC 2016
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24
The distance between two successive trough of a wave is 0.4m. If the frequency of the source is 825Hz, Calculate the speed of the wave
  • A. 165.0 ms-1
  • B. 330.0ms-1
  • C. 41.5ms-1
  • D. 85.0ms-1
View Answer & Discuss WAEC 2016
25
X-rays and infrared rays are both electromagnetic. Which common property do the waves have? Both waves
  • A. are longitudinal
  • B. have same frequency
  • C. have the same wavelength
  • D. travel at the same speed in a vacuum
View Answer & Discuss WAEC 2016
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