AQA Physics A - PHYA5 (18/06/12) - Exam thread

may I have some of your beautiful UMS? I don't know how I got a D in the Astrophysics module.. a D overall for that matter, I feel much more competent at it. This post is going to seem so out of place with all yours like!

Well, I got 120/120 in unit 4, which was a brilliant platform for me to get the A* in Physics. All I needed to do, with the help of my ISA, was to get a low A in PHYA5 - what do I do? I get a B

Oh well.

Exactly the same happened to me. And it happened in economics too. Pretty frustrating.

Thinking about just getting a remark. Doesn't really matter it would just be nice...

Yeah it is annoying!

But to be honest, in the grand scheme of things, it doesn't matter to me. I'm off to Warwick to study maths and that's a dream for me

See you there.

Anybody have a link to information or know how I can work out how far I was off a B overall?

cheers

So annoyed with my college about ISA grades.
I got 115/120 in unit 4, 110/120 in 5C but was stopped getting an A* by an ISA grade of 37/60...

An A is still really good and what I wanted but its just annoying when you realise that if you got the ISA grade you got last year you'd have an A*

just found a rock question, thought i should share as it might be helpful.

Potassium-42 decays with a half-life of 12 hours. When potassium-42 decays, it emits β– particles and gamma rays. One freshly prepared source has an activity of 3.0 × 107 Bq.
(a) To determine the radiation dose absorbed by the scientist working with the source, the number of gamma rays photons incident on each cm2 of the body has to be known.
One in every five of the decaying nuclei produces a gamma ray photon. A scientist is initially working 1.50 m from the fresh source with no shielding. Show that at this time approximately 21 gamma photons per second are incident on each cm2 of the scientist’s body.

b) The scientist returns 6 hours later and works at the same distance from the source.
(i) Calculate the new number of gamma ray photons incident per second on each cm2 of the scientist’s body.
number of gamma photons per second per cm2 = .................................
(ii) Explain why it is not necessary to consider the beta particle emissions when determining the radiation dose the scientist receives.

couldnt do it myself think we could get something like this?