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6.2 Uses and hazards

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Question 29
H

Sources X and Y have the same activity today. Source X has a half-life of 1 day1\ \text{day}1 day. Source Y has a half-life of 1000 years1000\ \text{years}1000 years.

Which statement about the sources one week later is correct?

[1]
A

X is more hazardous, because its activity has stayed almost the same

B

Y is less hazardous, because its activity has fallen to a very low value

C

X is equally hazardous, because both sources had the same activity

D

Y is more hazardous, because its activity has stayed almost the same

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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