P2 Additional Science Next week!!
Physics exam discussion - share revision tips in preparation for GCSE, A Level and other physics exams and discuss how they went afterwards.
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Re: P2 Additional Science Next week!!what grade did you get??(Original post by kILLERm)
For people who are doing a resit for P2, do you understand how u messed up first time?. I can't understand. I found the paper so easy yet I still slipped up. I don't know what I slipped up on, that's what scares me. -
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Re: P2 Additional Science Next week!!yeah i paid 8 quid and had my January 2012 paper returned to me so i could jhave a look where i went wrong, and not surprised where i went wrong i found jan 2012 much harder than past papers, thankfully p2 June grade boundaries are always low(Original post by kILLERm)
For people who are doing a resit for P2, do you understand how u messed up first time?. I can't understand. I found the paper so easy yet I still slipped up. I don't know what I slipped up on, that's what scares me. -
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Re: P2 Additional Science Next week!!Fusion is where two small atomic nuclei join together (FUSE together) to form a bigger and heavier nucleus.(Original post by khalidpatel)
Right guys lets keep the thread abit more lively can somebody explain the difference between nuclear fission and fusion??
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In fission either Uranium-235 or Plutonium-239 gets used as the fuel. There may be question on stating another fuel which gets used in fission so be prepared.
Fission is where a neutron gets absorbed by either Plutonium-239 or Uranium-235, releasing 2 or 3neutrons, energy and two nuclei. One of the two released neutrons would then be absorbed by further uranium-235 nucleus or plutonium-239 and so on. This is why fission is a called a controlled CHAIN reaction.
Nuclear Fusion occurs in stars and the Sun. A question paper for higher did ask where it occurs naturally.
That's all you need to know for fission and fusion. -
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Re: P2 Additional Science Next week!!The control rod would absorb neutrons. The proportion of neutrons absorbed by the control rods would increase if the rods are lowered in the reactor. Therefore when the control rods get lowered, a smaller proportion of neutrons get absorbed by the fuel rods (where fission occurs). As there are less neutrons for fission to occur, the chain reaction is controlled due to less energy released.
Make sure you know the above. In one higher paper for P2 they asked about the effect of lowering the control rods in a nuclear fission reactor. -
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Re: P2 Additional Science Next week!!Thinking Distance affected by:(Original post by Fas)
What could you say if the question was " State one factor which affects cars distance during driver reaction time"
Drugs
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Re: P2 Additional Science Next week!!Thank you, yeah I did that paper too.(Original post by krisshP)
The control rod would absorb neutrons. The proportion of neutrons absorbed by the control rods would increase if the rods are lowered in the reactor. Therefore when the control rods get lowered, a smaller proportion of neutrons get absorbed by the fuel rods (where fission occurs). As there are less neutrons for fission to occur, the chain reaction is controlled due to less energy released. Make sure you know the above. In one higher paper for P2 they asked about the effect of lowering the control rods in a nuclear fission reactor.
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Re: P2 Additional Science Next week!!Thank you(Original post by khalidpatel)
They give u the formulas but make sure u know the units!! This was posted from The Student Room's iPhone/iPad App
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Re: P2 Additional Science Next week!!B. It's a poor performance, considering that I got predominantly A*s along with a few As in my past papers.(Original post by khalidpatel)
what grade did you get??
For everyone doing the paper, my tip is to not panic. It wont get u anywhere if u do. I remained calm throughout my C2 paper and I barely made mistakes (approx 40/45). By panicing, u only drop easy marks as your brain switches off. Trust me. -
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Re: P2 Additional Science Next week!!No as a big question on the nuclear model and the plum pudding model came recently.(Original post by khalidpatel)
Guys do u think Rutherford stuff will be in tomorrows exam? Because it all ready came in jan??
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Re: P2 Additional Science Next week!!Braking distance is simply the distance travelled by a car from when the driver applies the brakes to when the car is stopped completely.(Original post by khalidpatel)
Braking distance :/ hmm not sure
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