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(a) Radioactive materials can be a risk to health - Edexcel - GCSE Physics - Question 6 - 2012 - Paper 1
Question 6
(a) Radioactive materials can be a risk to health. Some food contains radioactive material. Explain why people can eat this food without serious risk. (b) A radioac... show full transcript
Worked Solution & Example Answer:(a) Radioactive materials can be a risk to health - Edexcel - GCSE Physics - Question 6 - 2012 - Paper 1
Step 1
Explain why people can eat this food without serious risk.
Answer
People can consume food containing radioactive materials without serious risk because:
- The amount of radioactive material is typically small, minimizing exposure.
- The activity level of the radioactive material is low, often falling below background radiation levels, ensuring safety.
Step 3
The measured activity is now 100 Bq. Calculate the time between measurements.
Answer
The time between the measurements can be derived from the decay graph. Since the initial activity was 400 Bq and decreased to 100 Bq, we can see that this corresponds to a decay of 50 days based on the curve.