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NEET 2012 Physics question

PhysicsNucleiNEET 2012

A mixture consists of two radioactive materials and with half lives of and respectively. Initially the mixture has of and of . The amount of the two in the mixture will become equal after

Answer: (1)

Solution

Amount left after seconds: and . Equating: \dfrac$ = 160(Missing argument for \dfrac\dfrac ⇒ (Missing argument for \dfrac\dfrac = 4 ⇒ (Missing argument for \dfrac\dfrac = 4 =

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Question ID VK-091279