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Physics 2009 WAEC Past Questions

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21
Which of the following factors affect the rate of evaporation of a liquid? i. Exposed surface area ii Temperature of the surroundings iii. Thermal capacity of the liquid iv. Relative humidity of the surroundings
  • A. ii and iii only
  • B. ii, iii and iv only
  • C. i, iii and iv only
  • D. i, ii amd iv only
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22
The maximum displacement of a vibrating tunning fork is its
  • A. amplitude
  • B. frequency
  • C. period
  • D. wavelength
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23
A boat is rocked by waves of speed 30ms-1 whose successive crest are 10m apart. Calculate the rate at which the boat recieves the waves
  • A. 30s-1
  • B. 10s-1
  • C. 3s-1
  • D. 1s-1
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24
Which of the following waves is not transverse
  • A. light waves
  • B. sound waves
  • C. sea waves
  • D. radio waves
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25
Light travelling through a small pinhole usually does not make a shadow with a distinct sharp edge because of
  • A. diffraction
  • B. inteference
  • C. reflection
  • D. refraction
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