Edexcel Gcse Physics/additional Science - Unit P2 Physics For Your Future Page 32
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3432
(i)
Use the graph to find the half-life of the material.
(1 mark)
half life = ________________ days
(ii) Another sample of the material has an initial
count rate of 40 counts per minute.
Sketch, on the same axes, the activity of this
sample for the first 4 days. (2 marks)
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