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Physics 1989 WAEC Past Questions

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11
A thermometer has its stem marked in millimeter instead of degree Celsius. The lower fixed point is 30mm and the upper is 180mm. Calculate the temperature in degree celsius when the thermometer reads 45mm.
  • A. 67.5oC
  • B. 30.0oC
  • C. 25.0oC
  • D. 15.0oC
  • E. 10.0oC
View Answer & Discuss WAEC 1989
12
Which of the following surfaces will radiate heat energy best?
  • A. Red
  • B. White
  • C. Black
  • D. Yellow
  • E. Blue
View Answer & Discuss (10) WAEC 1989
13

Which of the following statements is/are not correct?

  • A. Evaporation takes place only at the surface of the liquid
  • B. Boiling takes place throughout the volume of the liquid
  • C. Evaportaion takes place at all temperatures
  • D. Boiling takes place at a particular temperature for a liquid at a fixed external pressure
  • E. The boiling point of a liquid is not affected by impurities
View Answer & Discuss (5) WAEC 1989
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14
Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain the
  • A. relative humidity is higher than at sea-level
  • B. rays of the sun adds more heat to the water
  • C. temperature is lower than that at sea-level
  • D. pressure is lower than that at sea-level
  • E. pressure is more than that at sea-level
View Answer & Discuss (4) WAEC 1989
15
Which of the following substance is not a good conductor of electricity?
  • A. Human body
  • B. Glass
  • C. Aluminium
  • D. Earth
  • E. Copper
View Answer & Discuss WAEC 1989
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