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  1. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    its tilted! the additional moment is no longer applied. think of it as a see saw with two kids on each side the kid on the right goes down causing the one on the left to go up now the kid on the right LEAVES, will the see saw still be in the same clockwise position? no! it will fall back...
  2. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    if all working which leads to 8 or 9 bulbs as an answer , then you get 3 if half the work is done then 2 just for writing the equation 1. A boundary will be VERY low, so don't worry. I'm so stupid! I forgot to add it back.
  3. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    you didn't understand background radiation is 14 you deduct that from initial counts which was 52 making the SOURCE ONLY COUNTS 38 divide 38 by 2 and THEN YOU GET 19. but you have to add back background radiation as your graph includes that in it's readings.
  4. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    the question states that the weight which caused it to tilt left was not applied anymore. think of this, you pull the tail and it rotates clockwise, but you LET GO, what happens? does it still keep rotating clockwise? no! because then the clockwise moment decreases when you let go, becoming...
  5. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    you deduct to find ONLY source radiation, then you divide by two for ONLY source halflife you only need to add background radiation back so that you can find out the time taken from the graph, becuase the counts per minute is with the background radiation as well. sorry if my explanation...
  6. Chucky

    Additional Mathematics ; post your doubts here!

    woah, I didn't think anyone here took Add math! I've been practicing latest papers all WEEK. I'll definitely post for help!
  7. Chucky

    i did my physics paper 32 in PENCIL

    I hope you haven't done it all in pencil. it always says "you may use pencil for diagrams" so I drew the magnetic field lines and the logic gates in pencil. no problem then, but if you leave calculations in pencil, then that's a problem, heard they don't even bother checking it (that's...
  8. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    but you have to deduct background radiation which was 14 making your inital count 52-14= 38 divide that by 2 = 19 add background radiation again 19+14= 33 now find how long it took to reduce to 33 counts should be 1.6 I guess but I wouldnt know, i forgot to add back the background radiation...
  9. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    must mention the type clockwise or anti clockwise. it is anti clockwise by the way. when we were all young we played with toys like these, funny we should sit for an exam with a question regarding one too.
  10. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    Yeah I knew 4 days was too long, thanks. but I should get 3 out of 4 for understanding that we deduct and the math. dont mind losing 1 mark, overall I guess I lost only 8-9 marks. WOW!
  11. Chucky

    Physics paper 32

    HAHA you talk funny.
  12. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    Variant one got some of those, but they were not easy either. Fully applied knowledge like ours. if you want me to compare, yes variant 2's are a bit harder this year, but beats me why CIE does that. sometimes variant one is harder too.
  13. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    They will provide a range in the mark scheme, 8- 9 should be acceptable. the current reading is rounded off , so the total number of bulbs also comes in decimal form, so you can round it off to 32 as well. no point fussing over this, if you got 8 or 9 its okay.
  14. Chucky

    physics paper 3, harder than hard

    expecting 65 to be lowest. that's just over 80% but don't worry, with the remarks i'm hearing from people, the scaling should be lower this time.
  15. Chucky

    Physics Pp:3-Variant 2- Discussing Answers!!

    the answer is 8 let the total number of bulbs be x. 5% of original resistance is 8.4 ohms voltage is same (source same) and the max current before the fuse melts is 0.9A therefore current= voltage/total resistance 0.9 = 240/(x * 8.4) the answer comes in 31.77 , round that off its 32. so the...
  16. Chucky

    physics paper 3, harder than hard

    that'sprobably correct too, i faintly remember seeing that as an answer.
  17. Chucky

    physics paper 3, harder than hard

    efficiency is somewhere around 33 % not 25% and the bird moves anti-clockwise, because after the additional force applied (when pulled) is not applied anymore when you let it go, the clockwise moment decreases and becomes equal to anti clockwise moment, an the bird rotates anticlockwise to...
  18. Chucky

    physics paper 3, harder than hard

    the one on how the reading doesn't decrease but increases? they will mark on two specific points - BACKGROUND radiation and spontaneousness on radioactivity. a similar question came in a previous year, so I knew this was the way to answer it: the radiaoactive substance had decayed to a stable...
  19. Chucky

    NO CALCULATORS IN PHYSICS 3 WTF!! DISCUSS THIS NOW D:

    you are allowed to use calculators for any subject, including english as well! :P you can sue them can't you?
  20. Chucky

    physics paper 3, harder than hard

    For the bulb question I got 8 bulbs the bird moments question wasn't difficult at all, we only had to use two equations (one for clockwise and anti clockwise, the other for all downward forces = all upwards forces) what was the ESSENTIAL feature of the turbines in the tidal power plant btw...
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