• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. L

    Physics Urgent Help Needed!!

    yes, always.
  2. L

    Physics Urgent Help Needed!!

    Walaikumusalam. well, for the first one (a), as it is connected in parallel, the voltage is the same throughout the circuit. As the resistance increases, the current decreases, so less current will flow through the buld, and therefore it's brightness decreases. for (b), as increasing the...
  3. L

    physics help

    @ahmed yeah thats what im saying, bt there is no other equation which can link frequency and the length except this one.
  4. L

    physics help

    speed=lambda x frequency S = L F same= L x same so we keep the length same to get the same frequency. well, i know that this equation is applied for waves, but there's no other equation linking F and L.
  5. L

    physics help

    why will it be D?
  6. L

    topical past papers

    i live in Riyadh..i got it from Alpha stationary bookstore.
  7. L

    topical past papers

    depends which country u r living in...i got it from a bookstore in saudia.
  8. L

    BIOLOGY URGENT HELP NEEDED!!!

    Walaikumusalam. Replication of the DNA is the splitting up of the double helix DNA molecule. 1) this is done by breaking the hydrogrn bonds between the 2 bases by helicase enzyme. 2) the free nucleotides in the nucleoplasm join together and form a sugar-phosphate backbone. this forms a strand of...
  9. L

    physics help

    it seems like chemistry rather than physics :shock: as metal wire has metallic bonding which means that there is a lattice of positive ions in the sea of delocalised electrons. so the electrons are always free to move whether current is passing or not. so i think its C...btw whats the answer...
  10. L

    physics question.....

    my teacher told me that we take the total mass because the accerleration of the 8kg block is caused by the 2kg block...and the 2 blocks are moving together...so for calculating the accerleration of the 8kg block we add both masses together.
  11. L

    Physics Book

    i use the same one---its the perfect book for AS.
  12. L

    physics question.....

    force= mass x acceleration acc. = force/ mass the force is----> W=mg =2.0 x 9.81 = 19.62 N therefore the resultant force is----> 19.62 - 6 (fritional force) = 13.62 N the total mass is---->the acc. of the box is caused by the 2kg block plus the mass itself..so the...
  13. L

    Need help in book selection

    i have a chemistry book which has both AS and A levels in it...its really nice, covers all the points in the syllabus... it has black cover....and is endorsed by university of cambrodge. this book is by..Brian Ratcliff, Helen Ecceles, John Raffan, John Nicholson, David Johnson, David Acaster...
  14. L

    Physics...May/June 08

    yup i got it...thanks Xenon :)
  15. L

    Physics...May/June 08

    Thanks Xenon! bt shouldn't it be the area of the trapezoid...the area under 40 and 70mm load?? i did that before and i was getting (C) 0.27J. can u please tell me that why did u use the area between 70 and 100mm??
  16. L

    Physics...May/June 08

    FORCE IS IN ''NEWTONS'' IN THE GRAPH...SORRY FOR THAT
  17. L

    Physics...May/June 08

    May/June 08 Question 23... A spring of original length 100 mm is compressed by a force. T he graph shows the variation of the length L of the spring with the comperessing force F. What is the energy stored in the spring when the length is 70 mm? A)0.090J B)0.21J C)0.27J D)0.63J. The...
  18. L

    Urgent help needed Physics 9702/P1/M/J/2004 Q9

    no..the question is 17 not 18. and the answer is B to it :)
  19. L

    Urgent help needed Physics 9702/P1/M/J/2004 Q9

    thats oct/nov 04 question no. 17...not 18 :) well here...power is the rate of energy(work done) so power= energy(work done)/time so power=(force x distance)/time the power should be in Watts, force in Newtons, Distance in meters and time in seconds. so here...they're asking us to find the...
  20. L

    Biology Help-->Genetic Control!

    Walaikumusalam. purines are double ringed structures while pyrimidines are single ringed. In a DNA double helix molecule....there should be one big(purine) and one smaller(pyrimidine) molecules. this pairing cause the DNA molecule to be in a helix shape. Also, purines are thymine and guanine...
Top