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2016 · M/J · 5054/11 | Q39

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CIE-5054-2016-MJ-p11 · Question 39

May/June 2016 Physics 5054/11: 40 multiple-choice questions, one mark each. No mark is deducted for a wrong answer. Electronic calculators may be used.
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39 A sample of a radioactive isotope produces a count rate of 10000 counts per minute. The half-life of the isotope is one day. What was the count rate of the sample two days ago? A 2500 counts per minute B 5000 counts per minute C 20000 counts per minute D 40000 counts per minute

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5054/11/M/J/16Cambridge O Level Physics 5054 · May/June 2016 · Paper 1 variant 1 · Question 39