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8 marksScientific Method

CSEC Physics · January 2017 · Paper 2 · Question 1(a)

A student conducted an experiment to investigate the temperature rise of 250 g of a liquid when heated by an electrical immersion heater. The results are recorded in Table 1.

On the grid provided on page 5, plot the graph of electrical energy, E, against temperature rise, ΔΤ.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 1(b)Using your graph, calculate the slope, S, of the graph.[5 marks]
  2. 1(c)What physical quantity does the slope represent?[1 mark]
  3. 1(d)Use the value of the slope S, calculated in 1 (b) on page 4, to determine the specific heat capacity of the liquid in the units Jg⁻¹k⁻¹. Assume there is…[4 marks]
  4. 1(e)(i)How does this procedure help in minimizing error in the experiment?[2 marks]
  5. 1(e)(ii)State ONE other useful precaution that the student should have taken.[1 mark]
  6. 1(f)Given that the power supplied to the immersion heater was kept constant at 40 W, calculate the time taken for 18.0 kJ of energy to be supplied.[4 marks]

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