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  1. D

    Biology; Chemistry; Physics: Post your doubts here!

    oh nooo, i posted in the wrong thread. its A level . :( sorry peeps
  2. D

    Biology; Chemistry; Physics: Post your doubts here!

    guys i need help please. bio past year m/j 2002 question 4.c explain why the blood pressure in the left ventricles falls to zeroin the cardiac cycle, but the lowest blood pressure recorded in the arteries is about 10kpa. answer : i. (pressure falls to zero) because all blood expelled from...
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    Biology paper 12 discussion

    me too please
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    how was additional mathematics paper 22 ?

    How did it go guys ?
  5. D

    Chemistry Variant 32 Paper Discussion

    dont they ask why the number decreases ? i put its bcs its killed by high conc of ethanol and the number increases because the yeast cells multiply and reproduce. is it correct ?:/
  6. D

    Chemistry Doubts: IGCSE Paper 3

    Has anyone done the exam ? Variant 2
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    Chemistry Variant 2

    Has anyone done with this paper ? How was it ?
  8. D

    physics paper 3, harder than hard

    can anyone enlighten me if the negative charges on the sphere (the second one, with the wire connected to it) are DISTRIBUTED evenly or STAY CLOSED to the charged rod ?
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    Physics Pp:3-Variant 2- Discussing Answers!!

    isnt the answer of finding the counter weight in no.1 was 0.5 or 0.6 ? i cant recall. and the bird is like 1 kg or some shit ? i can hardly remember but yeah
  10. D

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

    lol sorry i mean the counter weight is lighter than the bird. heheheh
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    Physics Pp:3-Variant 2- Discussing Answers!!

    but remember, the toy is lighter than the bird
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    Physics Pp:3-Variant 2- Discussing Answers!!

    how do you know that the background radiation is exactly is 14 ?? it varies.. so i dont think making any calculation with the background radiation is valid. all i did was just read from the graph and i got 2.6 days. in any textbook, when they show how to find the half life time, they just read...
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    Physics Pp:3-Variant 2- Discussing Answers!!

    im not suree. but logically if theres a seesaw with the centre of mass at the centre, then when you place an object that makes the seesaw rotates, the centre of mass still doesnt shift isnt it. /
  14. D

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

    ughh the number of bulbs. its too confusing. as long as there is 8.4 ohms and 8.4 x 0.9 and 240/(8.4x0.9), i should be getting a few marks. better than zero.
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    Physics Pp:3-Variant 2- Discussing Answers!!

    the the centre of mass is not at the pivot.. its to the left of the pivot. isnt it shown in the diagram itself ?o_O
  16. D

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

    guys, do you know the answer for the stupid bird ? does it stay stationary when rotated or it rotates back anticlockwise ? explain too please :)
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