OCR Physics A G485 - Frontiers of Physics - 18th June 2015

Cheers buddy. Hope adjustment works out!

Yep! I firmed Teessdide University for Chemical Engineering Meng for 4 years. Hoping to go for adjustment on results day though. What about you?

Good luck with adjustment, off to UCL here (hopefully)!

Good luck with adjustment, off to UCL here (hopefully)!

I hope there isn't a really general MRI question, there's so much to talk about!

Does anyone know if we shoud say 'high energy state' or 'anti-parallel alignment' when referring to the protons adsorbing radio photons, or will either suffice?

From what I've seen, high energy state is the one to go for.


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Appreciated. I wonder if we're even required to know about the protons' alignment.

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Seeing as I've no clue what that is and never been taught it, I should hope not

The G484 forum isn't so active so I going to post a G484 question here. So does anyone know if Kepler's third law, the T^2 = blah blah what ever, should only be used for geostationary? Or can it be used for anything? I don't know when to use it :C

Considering Kepler's Laws were known before that of Arthur Clarke's geostationary orbit idea, I assume it can be used for anything, whenever appropriate of course.

The G484 forum isn't so active so I going to post a G484 question here. So does anyone know if Kepler's third law, the T^2 = blah blah what ever, should only be used for geostationary? Or can it be used for anything? I don't know when to use it :C

The G484 forum isn't so active so I going to post a G484 question here. So does anyone know if Kepler's third law, the T^2 = blah blah what ever, should only be used for geostationary? Or can it be used for anything? I don't know when to use it :C

But then why sometimes in the mark scheme when you can use the kepler's law they show that you needed to combine equation for centripetal motion and use those to work out the orbit rather than the geostationary equation? I mean it does not say anywhere in the question that it is not geostationary or it is...

Yeah the equation doesn't apply for objects in circular motion when the weight of the object is not considered


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But orbits are circular motion....... :/

But orbits are circular motion....... :/

If you still don't get it let me know


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Oh yes! I got it thank you. So basically you can use the Kepler's equation when orbits with weights are involved. So most of the time. Thanks.