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. (2) 6(b) A radioactive material can be used to help diagnose heart disease. The graph shows the decay curve for this material. activity / Bq 0 800 400 0 25 50 75 100 125 150 time / days (i) A scientist measures the activity of a sample of this material as 400 Bq. Some time later, he measures the activity as 100 Bq. Put a cross (X) in the box next to your answer. The time between the two measurements is about: A 25 days B 50 days C 75 days D 100 days (1)

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6(a) Radioactive materials can be a risk to health - Edexcel - GCSE Physics - Question 6 - 2012 - Paper 1

Question 6

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. (2) 6(b) A... show full transcript

Worked Solution & Example Answer:6(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.

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People can safely eat food containing radioactive material because it usually contains only a small percentage of the material. Additionally, the activity level of the radioactive substances is low and below the natural background radiation levels, ensuring that any radiation exposure is within safe limits.

Step 2

The time between the two measurements is about:

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Answer

B 50 days

Step 3

Put a cross (X) in the box next to your answer.

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6(a) Radioactive materials can be a risk to health - Edexcel - GCSE Physics - Question 6 - 2012 - Paper 1

Worked Solution & Example Answer:6(a) Radioactive materials can be a risk to health - Edexcel - GCSE Physics - Question 6 - 2012 - Paper 1

Explain why people can eat this food without serious risk.

The time between the two measurements is about:

Put a cross (X) in the box next to your answer.

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