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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class12  >>  Atoms
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Q)

uranium ores on earth at present time typically have a composition of 99.3% of isotope 92U238 and 0.7% of isotope 92U235. The half lives of these isotopes are 4.47×109y and 7.04×108y respectively . If these isotopes were equally abundent when the earth was formed , estimate the age of earth .

(a)6×1010y(b)6×109y(c)6×108y(d)6×107y

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