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1.2 Conservation and dissipation of energy

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Question 7
F

A student measures how the temperature of hot water in a beaker changes with time. The student then repeats the measurements using an identical beaker wrapped in insulating material. Figure shows the results.

Figure: How the temperature of the water in each beaker changed with time

image

a.

Determine the temperature of the water in the beaker with no insulation after 15 minutes. Use Figure.

[1]
b.

Determine the difference between the temperatures of the water in the two beakers after 30 minutes. Use Figure.

[2]
c.

Explain why the water in the insulated beaker cools more slowly.

[2]
Markscheme

1.2 Conservation and dissipation of energy Questions

  1. GCSE
  2. /Physics
  3. /1.2 Conservation and dissipation of energy

40 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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