Episode – 78 || Chemistry || रेडिओ एक्टिविटी, कार्बन डेटिंग || By – R. Kumar

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Sonu garwal
September 19, 2020, 8:22 am

Sir Kya manav me bhi urenium ki matra hoti hai, hoti hai to kitani? Present time

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Rohit Pathania
September 16, 2020, 1:18 pm

Site isn't working properly sir. kindly solve this issue .🙏

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Aarti Yadav
September 12, 2020, 3:56 pm

Samjh aa gya acha se 😊thanks sir

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Parveen kumar
September 11, 2020, 10:20 pm

Thanks sir reply for my question answer

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Funfun Kumar Baitha
September 11, 2020, 7:58 pm

us time to manaw v nhi rhe honge to kaise pta chala ki 1U =180000 yrs hoga