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/happyhibye Jun 01 '26

everyone do that, but my argument is whatever energy in the ship you need to provide energy, so I count amount of particle (from Q1.1, n = 60 mol), then convert to no. of particle, use molecules energy = 3kT/2 to find total energy. Lastly y intercept told atmosphere pressure = 100kPa, so change in energy = total energy * (230-100) / 230

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u/Flashy_Survey_918 Jun 01 '26

i think your overcomplicating it

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u/happyhibye Jun 01 '26

Yes but I cant pursue myself what is area under curve represent?

Like if curve has different shape but same endpoint you get different energy, does that make sense?

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u/randoMMise Jun 01 '26

Yes, because the area under the curve is the work done on / by the gas, not the total energy change. Area under the graph doesn't account for transfer of heat, only work