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6.2 Uses and hazards

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Question 31
H

A tracer has a half-life of 6 hours6\ \text{hours}6 hours. A dose of the tracer has an activity of 800 MBq800\ \text{MBq}800 MBq at 08:00. The dose can only be used while its activity is at least 200 MBq200\ \text{MBq}200 MBq.

What is the latest time at which the dose can be used?

[1]
A

14:00 on the same day

B

02:00 on the next day

C

20:00 on the same day

D

08:00 on the next day

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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