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  1. J

    Chemistry Doubts: IGCSE Paper 3

    Find the no of moles... Caso4 = 79.1/13 = 0.58 for H2O = 20.9/18 = 1.16 For the ratio to be 1:1 u have to divide by the smallest number so CaSo4 = 0.58/0.58 H2O = 1.16/0.58(smallest no)...
  2. J

    Paper 6(2) Physics

    Both of our answers are correct :)
  3. J

    Physics, Chemistry and Biology: Post your doubts here!

    ITS a kind of pointer that is used to measure length! it doesnt matter if its a device or no just draw a pointer and the bottom and draw a ruler beside it................... its 1 mark anyway so
  4. J

    HEEEEELP! Paper 6 Q

    Ur welcome
  5. J

    Paper 6(2) Physics

    Ok then nice
  6. J

    Physics, Chemistry and Biology: Post your doubts here!

    Fiduciual aid means that u add a pointer to the spring at the bottom then place a ruler and measure the length!
  7. J

    Paper 6(2) Physics

    I think u gotta measure the thickness and then adjust ur calculations.. what does ur ms say bro
  8. J

    HEEEEELP! Paper 6 Q

    statement.. state ur opinion does it support/yes/no/are they proportional/ are they equal/ justify : using readings .. maybe V is 1 I is 2 and R is 0.5 V2 is 3 and I2 is 6 R is 0.5 Theory "students says that resistance is constant in the...
  9. J

    paper 6 need help with a question Physics

    pins should be more than 5 cm from each other to be clear... also lines are thin to be able to measure angles properly since thickness affects readings
  10. J

    Chemistry Doubts: IGCSE Paper 3

    Nylon = diamide + diacid Terylene = Diacid + diol Protein = aminoacid + aminoacid Fats are esters and starch is glucose molecules... just remove H and OH and then put a bracket and "n" down for all of these... hope this helped
  11. J

    Chemistry Doubts: IGCSE Paper 3

    yah to make esters Ester = Alkyl Alkanoate Alkyl is always from the alchohol Alkanoate is always from the acid!!!!
  12. J

    paper 6 need help with a question Physics

    this is complicatd look.. the pins image is reflected so the same distance from the mirror as p1 and p2 put p3 and p4.. SAME distance.. to measure the angle use a protractor find the angle of incidence then subtract it from 90 degress ALWAYS!!!!!!!!!!!! then for angle of reflection its same...
  13. J

    chemistry Paper 3 possibilities

    metals and tests
  14. J

    A question that has come up twice in paper 6

    always water and the hot object will balance temp to get to one temp where they are both the same so.. the metals temp supposedly dropped from 100 to 36 degrees(where both water and metal are same temp) ...... so subtract 100 from 36 will give u temperature change.... For the one who asked for...
  15. J

    physics paper 6 ?

    me 2 xactly... if arrows we ent given
  16. J

    physics paper 6 ?

    yes..
  17. J

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

    Ahahaaha i finally beat the smart girl in something!!!!
  18. J

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

    No its 1.56 angle of incidence = 40deg anyway how the hell can the ref indx of a glass be 1.3..... its always 1.5 ... And if i wrote for the generator question... to add a commutator which will allow current to be induced bothways.. will that be correct?? BTW power is 4.5W..
  19. J

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

    Critical angle was 40 right.. so 1/sin40 will give 1.56.... Guys can u answer this? "the answer about explain the radio activity was becoz its random and slow process bla bla right? for the dot and the charge u should draw like 5 arrows inwards right? Plus... what was the answer for the last...
  20. J

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

    ITS CD because all the rest are speeding up rather than speeding down...
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