Qualification > Sciences
How did u guyz do in phys p1 ?
sabrina:
--- Quote from: mr.incredible on May 20, 2010, 11:49:03 am ---The lithium question was confusing but in the end i chose A :) .
What about the following questions:
1. The force extension graph where the spring constant was required
2. The force distance graph of the electric field where there was located a positive charge
3. The change of state of ice to water
4. The electric field question where there was a positive charge located in a circle
5. The uncertainty of the density of something :D
--- End quote ---
ans for 3 is B
ans for 4 is A ( which is o even i did what 'spy' did i chose C)
ans for 5 is B
would u plz specify the first 2 question (i have got a poor memory)
mr.incredible:
--- Quote from: sabrina on May 20, 2010, 11:58:26 am ---ans for 3 is B
ans for 4 is A ( which is o even i did what 'spy' did i chose C)
ans for 5 is B
would u plz specify the first 2 question (i have got a poor memory)
--- End quote ---
1. A force (N) against Extension (mm) graph and it was a straight line which had a negative gradient and the spring constant was required and the answer i chose was 500 Nm^-1.
2. A force against distance graph where the positive charge moved from the negative plate to the positive plate.
Are you sure of number 3 ?? I think that both the spacing and density should increase. Does anybody agree with me ?
I chose +/- 0.5 for the uncertainty and i heard from fellow students that it should be +/- 0.6.
[Spy]:
no im sure for the constant its 0.2 it was simply y2-y1/x2-x1 gradient and i tried it for many points it always worked out as 0.2 :)
and for the density yeah im sure cause if you decrease the spacing then you decrease volume which is inversely proportional to the density and therefore density increases, so one is decrease and the other is increase
and yep uncertainty was surely 0.6 :D
vserian:
I badly did that paper
i felt very sad i even cried a little bit because i did all the past papers and did well in them, but in this paper i did a lot of mistakes!!!
mr.incredible:
--- Quote from: Spy on May 20, 2010, 12:09:23 pm ---no im sure for the constant its 0.2 it was simply y2-y1/x2-x1 gradient and i tried it for many points it always worked out as 0.2 :)
and for the density yeah im sure cause if you decrease the spacing then you decrease volume which is inversely proportional to the density and therefore density increases, so one is decrease and the other is increase
and yep uncertainty was surely 0.6 :D
--- End quote ---
Did you convert the mm into m ?
Can you tell me the steps you did for the uncertainty. I can tell you mine. I subtracted maximum mass of of beaker + liquid from minimum mass of empty beaker and divided minimum volume of liquid by this answer. Do you remember the values and uncertainty of each ?? :D
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