Physics · Nuclear Physics
किस रेडियोधर्मी आइसोटोप का आधा-जीवन (half-life) लगभग 5,730 वर्ष है, जिसका उपयोग आमतौर पर कागज और चर्मपत्र जैसी जैविक सामग्रियों की आयु का अनुमान लगाने के लिए किया जाता है?
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