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1426
A mercury-in-glass thermometer read 4cm at ice point and 29cm at steam point. Calculate the temperature when the mercury level is at 9cm
  • A. 13oC
  • B. 20oC
  • C. 33oC
  • D. 38oC
View Answer & Discuss (4) WAEC 2016
1427
The continuous stirring in the method of mixtures to determine the specific thermal capacity of a substance ensures
  • A. continuous dissipation of heat to the room
  • B. uniform distribution of thermal energy to all parts of the mixture
  • C. that the thermal energy is confined to the mixture
  • D. that there is rapid heat exchange
View Answer & Discuss (1) WAEC 2016
1428
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
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1429
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
1430
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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