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6.5 Uses and dangers of radioactivity

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Question 30
H

A sample of radioactive waste has an activity of 2.4×105 Bq2.4\times10^5\ \mathrm{Bq}2.4×105 Bq and a half-life of 5 days. A stated storage procedure requires its activity to fall below 1.0×104 Bq1.0\times10^4\ \mathrm{Bq}1.0×104 Bq before the next handling stage. After which time is this condition first met?

[1]
A

252525 days

B

202020 days

C

303030 days

D

151515 days

Markscheme

6.5 Uses and dangers of radioactivity Questions

  1. GCSE
  2. /Physics
  3. /6.5 Uses and dangers of radioactivity

97 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity, covering 6.5.1 Uses of radioactivity, 6.5.2 Dangers of ionising radiation and precautions, 6.5.3 Half-life and radiation dangers, 6.5.4 Safety precautions for radiation exposure, and 6.5.5 Contamination and irradiation. Each one has a worked solution and a mark scheme showing where the marks go.

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