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691

A cube made of a metal of linear expansivity is warmed through a temperature of t. lf the initial volume of the cube is V what is the increase in volume of the cube?

  • A. 1/3α Vt
  • B. 1/2α Vt
  • C. α Vt
  • D. 2α Vt
  • E. 3α Vt
View Answer & Discuss (5) WAEC 1990
692
Dry hydrogen is trapped by pellet of mercury in a uniform capillary tube closed at one end. If the length of the column of hydrogen at 27°C is 1.0m, at what temperature will the length be 1.20m?
  • A. 22.5oC
  • B. 32.4oC
  • C. 77.0oC
  • D. 87.0oC
  • E. 360.0oC
View Answer & Discuss (3) WAEC 1990
693
Two solids P and Q of equal mass are heated to the same temperature and dropped simultaneously into two identical containers X and Y containing equal volumes of water at room temperature. The temperature of X will rise higher than that of Y only if the
  • A. volume of P is greater than that of Q
  • B. specific heat capacity of P is higher than that of Q
  • C. density of P is greater than that of Q
  • D. density of P is lower than that of Q
  • E. specitic heat capacity of P is lower than that of Q.
View Answer & Discuss (10) WAEC 1990
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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694

lf the temperature of a small quantity of water in a closed container is gradually increased from 0o to 40oC then the density of the water within this range

  • A. increases for a while and then decreases
  • B. decreases for a while and then increases
  • C. increases gradually
  • D. decreases gradually
  • E. remains the same
View Answer & Discuss (10) WAEC 1990
695
How much heat is given out when a piece of iron of mass 50g and specific heat capacity 460 Jkg-1k-1 cools from 85oC to 25oC?
  • A. 1.38 x 106 J
  • B. 2.53x104J
  • C. 7.66x103J
  • D. 1.38x103J
  • E. 1.27 X103J
View Answer & Discuss (4) WAEC 1990
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