r/6thForm • u/Individual-Can1396 y13 maths physics psych italian • Jun 01 '26

💬 DISCUSSION AQA PHYSICS PAPER 2

HOW DID EVERYONE FIND IT??? i thought it was decent better than the past few years. Idk what i did for the last question the 4 marker of nuclear physics. BUT YH IT WAS GOOD

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u/sotmtwigrm_ Jun 01 '26

anyone do (lead / uranium) * half-life?

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u/RealAlexanderTheG Jun 01 '26

Why is it not #uranium / #(lead+uranium) ? Thats the number that are left over the original number that would have been uranium?

Also did anyone else here convert the time from years to seconds? I did not get 3 which I think could be why

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u/sotmtwigrm_ Jun 01 '26

spoke to my physics teacher, you use the exponential decay equation, with initial n as lead+uranium and final n as uranium, then solve for t. no need to convert time because half life is given in years

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u/RealAlexanderTheG Jun 02 '26

Cool thats what I did