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Physics g494 2016

How did everyone do? Can someone tell me about the question with helium atoms? I don't know if I've done it wrong
Reply 1
Anyone?
Reply 2
I thought it was an alright exam personally.

For that helium question Im not sure if I did it right but I said that the total energy would be zero.

Et = Ek + Egp
Et = 0 so Ek = - Egp
Ek = -(-GMm/r) so Ek = GMm/r

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