CAPE Physics Unit 2 · 2009 · Paper 1 · Question Q42
Item 42 refers to the following diagram which shows how the count rate of a certain sample of radioactive material varies with time. What is the approximate half-life of the sample?
- (A)
25\text{ s} - (B)
35\text{ s} - (C)
40\text{ s} - (D)
50\text{ s}
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