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  1. E

    HOW WAS PHYSICS PAPER 5 PPL ? HOW WAS YOUR EXAM ?

    not even...explain
  2. E

    HOW WAS PHYSICS PAPER 5 PPL ? HOW WAS YOUR EXAM ?

    You guyz are thinking too much... just use a "wind speed detector", im assuming they wud accept it as we have never studied about any instrument that measures wind speed plus it was only one mark for "how to measure the independent variable [1]" there were many other important things that needed...
  3. E

    HOW WAS PHYSICS PAPER 5 PPL ? HOW WAS YOUR EXAM ?

    and what did u guyz get for uncertainties for your tables...i got like +/- 0.02 - 0.04
  4. E

    HOW WAS PHYSICS PAPER 5 PPL ? HOW WAS YOUR EXAM ?

    My answers: Gradient: 142 +- 8 2nd ques: 3.72x10^-4 ---- units: N/Hz^2 m^2 3rd ques: 21.3% 4th ques: forgot 5th ques: 10.7% Your 3rd ques value should be halved to get the 5th ques value
  5. E

    Chemistry 42....how did it go?..expected GT

    what did u guyz get for the tests? i dont remember all but i remember putting 2,4-DNPH somewhere and also Tollens' Reagent for differentiating between ketone and aldehyde
  6. E

    Chemistry 42....how did it go?..expected GT

    amide was there, it breaks down due to acid hydrolysis
  7. E

    Chemistry 42....how did it go?..expected GT

    the whole question (the compound, its isomer and its mechanism) was worth 3marks and these noobs are arguing like it was worth the whole paper :P
  8. E

    Chemistry 42....how did it go?..expected GT

    due to incomplete combustion
  9. E

    Chemo P5 tips

    From your graph, you find the mass/100g (solubility) at T= 85C and then the mass at T=35C Divide both masses by 2 because in the graph, the solubility is in mass/100g and in the question we'r dealing with 50g of potassium chlorate. So now subtract the 2 masses and you get the mass that...
  10. E

    Chemo P5 tips

    Dividing by 4 is incorrect. Suppose, initially you have 1000cm3 and 50g. When you add these you get a 1 mol/dm3 solution because Mr= 50. Now, when you divide both volume and Mr by 4, you're only decreasing the volume. The concentration remains the same. Calculation shows this: Moles = 12.5/50 =...
  11. E

    Chemo P5 tips

    The first calculation is incorrect as someone pointed out already. The second calculation is also incorrect. moles required in the 250cm3 solution = .250 x .5 = 0.125 mass required = moles x Mr = .125 x 50 = 6.25g (not 12.5g)
  12. E

    Physics (p4) messed up *HELP*

    omg guyz i was kidding :] u guyz will believe anything...
  13. E

    Physics P4 Discussion

    omg i felt so intelligent just understanding the rectangular part of the graph part i didnt even care to see if it would be inverted (n)
  14. E

    Physics P4 Discussion

    and how did u guys find the electric field strength from that gradient question
  15. E

    Physics P4 Discussion

    the variation in the mass for the magnetic question was +1.0g / -1.0g i think....caz u had to find the peak current from the rms then find the total change in mass which was around 4.6 and then the variation which was 4.6-3.6 = 1.0g caz 3.6 was the original reading when no current was flowing so...
  16. E

    Physics (p4) messed up *HELP*

    yea dude, i got like a C on my paper 4 once and a E on my practical 5 and my AS grade was B and i still got an A* so dont worry !
  17. E

    Physics 42.... How'd it go?????

    Moderator Edit : Paper Content
  18. E

    Physics / Chemistry / Bio P5 help

    ok
  19. E

    My notes for Biology and Physics A2

    Mistake in: Matter - Ideal Gases. <c2> is not the root mean square speed. It is the just the mean square speed of the atoms.
  20. E

    Difficult A2 physics question! Please help

    Can anyone please answer this question and explain it? I don't know what I'm doing wrong.
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