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Physics WAEC Past Questions

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1376
A quantity of hot water at 100oC is added to 400g of water at 10oC until the temperature of the mixture is 60oC.

Calculate the mass of the hot water added. [Specific heat capacity of water =4200JKg-1 K-1]
  • A. 200g
  • B. 320g
  • C. 400g
  • D. 500g
View Answer & Discuss (4) WAEC 2015
1377
A battery of emf 24V is connected to three resistor P, Q and R as illustrated in the diagram. Determine the voltage across the resistor Q
  • A. 5v
  • B. 10v
  • C. 14v
  • D. 24v
View Answer & Discuss (10) WAEC 2015
1378
In an experiment in which a molten substance is allowed to cool, the cooling curve above was obtained. The temperature 60oC is known as the
  • A. vaporization point
  • B. cooling temperature
  • C. boiling point
  • D. melting point
View Answer & Discuss (1) WAEC 2015
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1379
In an experiment in which a molten substance is allowed to cool, the cooling curve above was obtained. The temperature 60oC is known as the
  • A. vaporization point
  • B. cooling temperature
  • C. boiling point
  • D. melting point
View Answer & Discuss (7) WAEC 2015
1380

Which of the following concepts is a method of heat transfer that does not require a material medium?

  • A. conduction
  • B. radiation
  • C. diffusion
  • D. convection
View Answer & Discuss (6) WAEC 2015
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