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6.2 Uses and hazards

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Question 4
F

A nuclear power station uses fission of uranium-235. Each fission of a uranium-235 nucleus releases 3.2 × 10-11 J of energy.

a.

Calculate the energy released by 1.0 × 1020 fissions.

[2]
b.

The reactor releases energy at a rate of 1.6 GW1.6\ \text{GW}1.6 GW. Use the equation: energy transferred=power×time\text{energy transferred} = \text{power} \times \text{time}energy transferred=power×time Calculate the number of fissions that happen in the reactor each second. Give your answer in standard form.

[3]
c.

Explain why the number of fissions each second could increase very quickly.

[2]
Markscheme

6.2 Uses and hazards Questions

  1. GCSE
  2. /Physics
  3. /6.2 Uses and hazards

48 exam-style questions on OCR GCSE Physics 6.2 Uses and hazards, covering 6.2.1 Contamination and irradiation, 6.2.2 Half-life and radiation hazards, 6.2.3 Medical uses of nuclear radiation, 6.2.4 Nuclear fission and chain reactions, and 6.2.5 Nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.

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