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JEE PHYSICS MCQ: NUCLEI
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The half-life of a radioactive isotope ‘x’ is 60 years. It decays to another element ‘y’ which is stable. Two elements x and y were found to be in the ratio of 1 : 15 in a sample of a given rock. The age of the rock was estimated to be
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Correct option: D
240 years
Option A (5 m) is correct because the distance is calculated by finding the time it takes for the box to fall off the trolley and then using the lorry's acceleration to find the distance covered.
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