Cambridge IGCSE Physics · 5.2 · data analysis
Decay of a laboratory source
Radioactivity · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- demanding
- Marks
- 4
- Topics
- 2
- Answer
- Complete
Question4 marks
A laboratory source has an initial corrected count rate of 1440 counts/min and a half-life of 8 h. Determine the corrected count rate after 16 h.
Task interpretation
What a complete response should do
Identify the useful evidence, process it with units, and make only the conclusion the data supports.
Split the problem into linked stages and state why each relationship applies.
- Response type
- data analysis
- Allocation
- 4 marks
- Demand
- demanding
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