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Physics 1992 WAEC Past Questions

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16

A gas which obeys Charles’ law exactly has a volume of 283cm3 at 10oC. What is its volume at 30oC?

  • A. 142cm3
  • B. 293cm3
  • C. 303cm3
  • D. 566cm3
  • E. 849cm3
View Answer & Discuss (5) WAEC 1992
17
Which of the following best explains why a person suffers a more severe burn when his skin is exposed to steam than when boiling water pours on his skin?
  • A. Steam is at a higher temperature than boiling water
  • B. Steam possesses greater heat energy per unit mass than boiling water
  • C. Steam spreads more easily over a wider area of the skin man boiling water
  • D. Steam penetrates more deeply into the skin than boiling water
  • E. the specific latent heat of vaporization is released in changing from boiling water to steam
View Answer & Discuss (2) WAEC 1992
18

A small circular membrane is 10cm below the surface of a pool of mercury when the barometric height is 76 cm of mercury. If the density of mercury is 13600\(kgm^{-3}\), what is the pressure on the membrane in \(Nm^{-2}\)? \((g =10ms^{-2})\)

  • A. 1.17 x 107 Nm-2
  • B. 6.80 x 105Nm-2
  • C. 1.17x105Nm-2
  • D. 1.03 x 105Nm-2
  • E. 1.36 x104 Nm-2
View Answer & Discuss (5) WAEC 1992
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19
Which of the following instruments is used to measure relative humidity?
  • A. Hydrometer
  • B. Barometer
  • C. Manometer
  • D. Hypsometer
  • E. Hygrometer
View Answer & Discuss (1) WAEC 1992
20
A metal of mass 1.5 kg was heated from 27oC to 47oC in 4 minutes by a boiling ring of 75 W rating. Calculate the specific heat capacity of the metal, (Neglect heat losses to the surrounding)
  • A. 2.5 X103J kg-10C-1
  • B. 6.0 X102J kg-10C-1
  • C. 2.5 x 102J kg-10C-1
  • D. 1.4 X102J kg-10C-1
  • E. 1.0 x 102J kg-10C-1
View Answer & Discuss (1) WAEC 1992
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