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3 marksThermal Measurements

CSEC Physics · January 2010 · Paper 2 · Question 4(b)(iv)

1 kWh = 3.6 × 10⁶ J. Specific heat capacity of water, C = 4200 J kg⁻¹ K⁻¹.

What mass of water can the glazed collector heat from 25°C to 55°C during the day?

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Other parts of this question

  1. 4(a)Using the information in Figure 3, explain how the home-cooked meal is kept warm.[6 marks]
  2. 4(b)(i)Calculate the energy in kWh collected by the absorber per day.[2 marks]
  3. 4(b)(ii)Calculate how much energy per day can be used to heat water if the collector emits 50% of the heat energy it receives from the atmosphere.[2 marks]
  4. 4(b)(iii)How much energy per day is now available to heat the water?[2 marks]

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