• 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. 7

    Mathematics: Post your doubts here!

    That's exactly how I did it! Guess its a misprint or something. The books can be wrong sometimes. //shrugs Thanks! :D
  2. 7

    Mathematics: Post your doubts here!

    Can someone help me out with this integration sum? Use a substitution of the form ax+b=u to find the integral for x/(2x+3) The answer's x/2 - 3 ln |2x+3| +k But I got x/2 +3/4 - 3 ln |2x+3| +k I'd very much appreciate if you showed all the steps please.
  3. 7

    I messed up badly, tell me what to do...

    I'm wondering what to do too. Initially got a b in chem, after retake I got a c! D: Idk what to do with this now...
  4. 7

    Retake worse than first sitting...:C

    I did retake. In one subject the new grade was worse than the old one.
  5. 7

    Retake worse than first sitting...:C

    First time, did ok in 2 subjects but bad in other 2. This time, screwed up the ones that were good before and improved on the other 2. Its just horribly disappointing. No fix for it is there?
  6. 7

    physics paper 33

    Suppose you have 2 values a & b, we're taking about adding/subtracting/whatever those 2 values. Got it now?
  7. 7

    physics paper 33

    Uhh im not too good with those but here's a try: You found m by 50-0 right? Then % uncertainty of m = ((0.05 x 2) / m ) x 100 For repeated readings, as in taking average values, uncertainty is half the least uncertainty of the apparatus used. When multiplying or dividing quantities, add their %...
  8. 7

    physics paper 33

    gradient= delta y / delta x so units will be units of y / units of x = sec/metre = sm^-1
  9. 7

    physics paper 33

    Yes, units are required.
  10. 7

    physics paper 33

    Can someone run me thru how to use micrometer and verniers plz?
  11. 7

    physics paper 33

    xD Ik that method, its what I've been using in lab class and mocks: if both k's are approximately equal then they are proportional. That's teacher approved actually. But then I saw these posts and the mark scheme also said "test against suitable criterion" and now idkkkkk D:
  12. 7

    physics paper 33

    Been lookin thru forums and there's different methods... To find the % uncertainty its either "k2-k1/k2 x 100" or "k2-k1/k1 x 100" to find % uncertainty of k. My logic says to use k1 in denominator, cuz that'll give the greatest possible uncertinty... They also say to compare that with a 20%...
  13. 7

    physics paper 33

    Keep the signs for both eqn and intercept, got it tyvm 8D
  14. 7

    physics paper 33

    Ok in the last part of Q1 where we find the gradient intercepts and constants, if the eqn is like "a = c/d - e/f" and you get a -ve intercept FROM THE GRAPH, do we replace e/f with " - intercept" to get +ve value, or just "intercept" because there already is a - in front of the e/f? Ugh this...
  15. 7

    physics paper 33

    Yep, lookin thru those now thnx. Also in the same mark scheme, they say to draw a conclusion about proportionality of k "tested against a suitable criterion by the student." Whats this mean?
  16. 7

    physics paper 33

    Kay...and in the next part, -p/q = y intercept? so q will come out -ve right?
  17. 7

    physics paper 33

    Can't be quite sure unless I see an example question but these are usually accepted: Errors: heat loss thru walls of container, water evaporates, and idk know to phrase this but its like human reaction error or something when you have to take a temperature reading and the corresponding time...
  18. 7

    physics paper 33

    Got it, thnx!
  19. 7

    physics paper 33

    Ooooh, so if adding values uncertainy gets halved, subtracting it gets doubled?
  20. 7

    physics paper 33

    You mean the limitations and improvements section at the end of Q2?
Top