# ordinaryguy

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• Gender
Male
• Exams
May 2015
• Country
Poland
1. ## may 2015 Math HL paper 1

I did TZ2 and I left about 10 points untouched, overall I think I lost about 30. If I had a little more time, I could easily get 8 more marks. Generally, this paper could be considered friendly, if it wasn't for the 2 hours. At one point I totally panicked and in such condition it is difficult to arrive at a correct answer or even at an idea on how to solve a problem. However, I still don't lose my hopes for a 7, if the grade boundaries do not go up and provided that I did fine in other questions.
2. ## may 2015 Physics HL options

OK, so I think it has been 3 hours since we started being able to discuss the exams, so how did you find the exams and what were the options that you chose?
3. ## May 2015- Physics Paper 1 and Paper 2

I gave the same answers as you for data analysis and green light emitted, also 16 is the correct answer, then doesnt "s" stand simply for second? anyway i got that wrong haha and I found the grav strength from two mechanics formulas s = (v+t)2 * t and v^2 = u^2 + 2gs
4. ## May 2015- Physics Paper 1 and Paper 2

Yep, just used the first law of thermodynamics for that one. Q = 0, Q=dU+W, W=210, -210=U Thats great! Ok guys It's my first day here and I already cant leave But im back to studying, good luck everyone on paper 3 on monday
5. ## May 2015- Physics Paper 1 and Paper 2

again to those who did thermodynamics, there was this last question saying that in adiabatic change work done was i think 210J, what was the change in internal energy.. so since that was adiabatic there was no heat exchange so the change in internal energy was -210J, did i get this one right?

7. ## May 2015- Physics Paper 1 and Paper 2

Yes nlebanon I think I ended up labeling the one to the right
8. ## May 2015- Physics Paper 1 and Paper 2

Yep, I got 500K. Silly of them to ask which process was adiabatic after that question! I mean, I think they even stated it in a later question which one was adiabatic... Thanks for that free point. Was there a question that asked which one was adiabatic? Lol I remember having to label the one which was isochoric
9. ## May 2015- Physics Paper 1 and Paper 2

Who did the question on thermodynamics where you had to calc the new temperature of the gas? Did you guys get 500K?
10. ## May 2015- Physics Paper 1 and Paper 2

i deduced that according to the formula, if max displacement is halved, then the max energy is 1/4
11. ## May 2015- Physics Paper 1 and Paper 2

How did you find question 7? I found Q7 alright, might have messed up a bit when calculating the mass. I used the equation Ek=.5mÏ‰^2x^2 to get the mass and got 3.something :/ Hbu? Why 5? I used the same equation, but I got something like 0.27 kg. How did you find question 7? I found Q7 alright, might have messed up a bit when calculating the mass. I used the equation Ek=.5mÏ‰^2x^2 to get the mass and got 3.something :/ Hbu? Also, how did you draw the graph for the KE of particle B? I also got something like this with mass and my graph started at -0.1 and ended at 0.1 and it reached a quarter height
12. ## May 2015- Physics Paper 1 and Paper 2

Oh, right... I never would have guessed that.... Really? I just read electrical currents and skipped that one immediately, hehe. Question 6 was pretty decent, more or less straightforward. Seems like we got few "show that" questions overall, which was a shame - love those! hahah same here! I hate electric currents with passion and question 6 was very nice Was it about climate and the satellite?
13. ## May 2015- Physics Paper 1 and Paper 2

I guess that is how you express 0 using 4 bits
14. ## May 2015- Physics Paper 1 and Paper 2

I picked that too, you just raise the number 2 to the power of the number of places and you get 2^4 = 16
15. ## May 2015- Physics Paper 1 and Paper 2

Sofia I think they asked why you could not use polarization for ultrasound and this is because sound is a longitudinal wave and polarization is the property of transverse waves only, at least that is what I wrote.. and as to question 38, can you remind me what it asked about?
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