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  1. Hamzeh S

    Physics, Chemistry and Biology: Post your doubts here!

    3 x 10^8 and sound is 320-330 in air
  2. Hamzeh S

    Physics, Chemistry and Biology: Post your doubts here!

    How many S.f round our answers to ?
  3. Hamzeh S

    Physics, Chemistry and Biology: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Physics%20(0625)/0625_w11_qp_32.pdf First question part B Why to use the energy at the positon in A while he clearly ask for speed at position where its vertical which means when its equal to 2 m the height why use the answer of A energy...
  4. Hamzeh S

    Paper 3 physics !! get help here :)

    First part the 60 W lamp are 3 so total power is 60 x3 which is 180 and subtract 15x3 from it it will give you 135 which power reduction second part energy in the first condition was energy = 180 x 3600 ( 1 hour in seconds) so energy at 180 W is 648,000 J when using energy saving lamp its 15...
  5. Hamzeh S

    Paper 3 physics !! get help here :)

    hahaha well good luck in your exam (Y)
  6. Hamzeh S

    Paper 3 physics !! get help here :)

    Haha no problem :) glad to help wow is your teacher that bad ? :S
  7. Hamzeh S

    Paper 3 physics !! get help here :)

    Oh and for an object to be equalibream forces in the opposite direction must be equal and clockwise moment is equal to anti-clockwise moment just memorize them they are 2 points
  8. Hamzeh S

    Paper 3 physics !! get help here :)

    Well the moment is equal to the Distance from the Pivot or center multiplied by the force or weight of the object and clockwise moment is equal to anti-clockwise moment Because the object is always equilbream in the questions so if we got an object which is 5 cm away from the pivot and...
  9. Hamzeh S

    Paper 3 physics !! get help here :)

    Sure What do you need ?
  10. Hamzeh S

    Physic Help

    Use the law of pressure 1 x volume 1 = pressure 2 x volume 2 so 2.2x10^5 x 0.5 = V2 x atomosphereic pressure since its gonna reach the surface so 110,000=V x 1x10^5 v= 110000/1x10^5 =1.1 cm3
  11. Hamzeh S

    Physic Help

    well we got the power which 528 multiply it by the time which is 5 to get the energy or workdone in Joules 2640 = force x distance in meters 2640 = 800 x D D = 3.3 meters x100 = 330 CM each rug is 30 cm so 330/30 is equal to 11 rugs :) Post Any more doubt if you need
  12. Hamzeh S

    Physic Help

    For part C first questions just take any 2 points from y axis and divide them by difference between any 2 points at x-axis the answer would be 5.71 something like that in part B when you draw the best fit line and extend it the point where it touches the y -axis is the point where acceleration...
  13. Hamzeh S

    Guys, please help me with this physics doubt? :(

    oh my teacher taught me this one last year you just need to draw 2 students with a distance measured between them one student with a stop watch and the other one with a device that generates light and sound at the same time and then the student with the stop watch must start the stop watch when...
  14. Hamzeh S

    Chemistry Paper 61

    Thanks :P im good at paper 3 and 1 but paper 6 chemistry hate it :@ glad im getting 48-51 :P better than nothing
  15. Hamzeh S

    Chemistry Paper 61

    Guys i want you to grade me please im really worried first exam i worry about i get the apartus and curves right .. and last question first page i wrote cryastallization and to make solvent more solube how know if reaction finished i wrote residue of iron powder and the second point is wrong nvm...
  16. Hamzeh S

    Chemistry Paper 61

    Guys i want you to grade me please im really worried first exam i worry about i get the apartus and curves right .. and last question first page i wrote cryastallization and to make solvent more solube how know if reaction finished i wrote residue of iron powder and the second point is wrong nvm...
  17. Hamzeh S

    Paper 3 physics !! get help here :)

    Post any doubt and i will be happy to answer you :D
  18. Hamzeh S

    Paper 3 physics !! get help here :)

    Cie or Edexcel ?
  19. Hamzeh S

    What exactly is percentile?

    Yes
  20. Hamzeh S

    Chemistry Paper 61

    Guys i want you to grade me please im really worried first exam i worry about i get the apartus and curves right .. and last question first page i wrote cryastallization and to make solvent more solube how know if reaction finished i wrote residue of iron powder and the second point is wrong nvm...
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