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6.5 Uses and dangers of radioactivity

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Question 21

In a commercial nuclear fission reactor, uranium-235 nuclei undergo fission to release energy. During a specific operating interval, the total nuclear energy released by these fission reactions is 1.35 × 10¹¹ J.

This energy, $E$ , is produced by the conversion of a small amount of mass, $Δm\Delta m$ , according to the mass-energy equivalence equation:

\Delta m c^2

where $c\,$ represents the speed of light, 3.0 × 10⁸ m/s.

Calculate the mass defect (the decrease in mass), $Δm\Delta m$ , that corresponds to this energy release. Show your working.

[3]

Markscheme

6.5 Uses and dangers of radioactivity Questions

GCSE
Physics
6.5 Uses and dangers of radioactivity

94 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity. Each one has a worked solution and a mark scheme showing where the marks go.

6.5 Uses and dangers of radioactivity

Question bank

6.5 Uses and dangers of radioactivity

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Question 21

This energy, $E$ , is produced by the conversion of a small amount of mass, $Δm\Delta m$ , according to the mass-energy equivalence equation:

\Delta m c^2

where $c\,$ represents the speed of light, 3.0 × 10⁸ m/s.

Calculate the mass defect (the decrease in mass), $Δm\Delta m$ , that corresponds to this energy release. Show your working.

[3]

Markscheme

6.5 Uses and dangers of radioactivity Questions

GCSE
Physics
6.5 Uses and dangers of radioactivity

94 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity. Each one has a worked solution and a mark scheme showing where the marks go.