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  3. a radio isotope 'x' with a half life 1.4 10?years

A radio isotope 'X' with a half life 1.4 10?years decays to 'Y' which...

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Physics

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A radio isotope 'X' with a half life 1.4 10?years decays to 'Y' which is stable. A sample ofthe rock from a cave was found to contain 'X'and 'Y' in the ratio 1: 7. The age of the rock is1.96 10 years3.92 10 years4.20 10 years8.40 10 years

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