Sofia. Posted May 9, 2015 Report Share Posted May 9, 2015 I picked that too, you just raise the number 2 to the power of the number of places and you get 2^4 = 16 But does 0000 count? Yes it does Because in digital technology, 0000 strictly represents the state of the system, rather than the number zero. So the digital signal 0000 can represent the state at which the analogue signal is 0, for example. Awesome! Reply Link to post Share on other sites More sharing options...
whydidiprocrastinate Posted May 9, 2015 Report Share Posted May 9, 2015 TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. Reply Link to post Share on other sites More sharing options...
superspeed49 Posted May 9, 2015 Author Report Share Posted May 9, 2015 I am TZ2 and I also found Paper 1 challenging, a few questions totally surprised me such as the artificial transmutation or unit for capacitance. Paper 2 was very easy compared to my expectations, I skipped the answers that were worth like 15 marks, the rest I could answer more or less. I had no idea how to solve the last question in section A about magnetic fields, the rest in section A were fine, I picked 6 and 7 in section B. I was planning on doing 7 and 8 but I just started the question number 6 and was like.. oh well. Hope it was a good choice. Not entirely sure I managed to solve the emf question completely, if that's the one you mean. What I did is I used emf = Blv. B was given and the length was the sum of three of the sides (since it had not entered fully, so the last one wasn't in the field as of yet). Since the thing was dropped, the velocity could be found from doing a bit of mechanics, with s = length of one end, u = 0 and a = gravity. Then you can use v^2 = u^2 + 2as to find the velocity. What didyou answer for part b (the one of the coil taking more time to enter)? Reply Link to post Share on other sites More sharing options...
Sofia. Posted May 9, 2015 Report Share Posted May 9, 2015 Because it would then be a circuit, so current will flow. According to Lenz's law, the force created by that current will oppose the force that created it, which was the force downwards. So suddenly, there will be a force upwards which slows it down. 3 Reply Link to post Share on other sites More sharing options...
whydidiprocrastinate Posted May 9, 2015 Report Share Posted May 9, 2015 Yes I m TZ2 and I did Question 7 and Question 8 (second and third question in section B). The question on magnetic fields was quite difficult for me, I couldn't find the time. Paper 1 was way harder... hoping paper 3 is easy... For question 8, what did your graph for momentum looked like? Reply Link to post Share on other sites More sharing options...
superspeed49 Posted May 9, 2015 Author Report Share Posted May 9, 2015 Because it would then be a circuit, so current will flow. According to Lenz's law, the force created by that current will oppose the force that created it, which was the force downwards. So suddenly, there will be a force upwards which slows it down. Oh, right... I never would have guessed that.... TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard.I and most of my classmates chose Q7 and Q8 too- as they seemed the easiest ones. Reply Link to post Share on other sites More sharing options...
Sofia. Posted May 9, 2015 Report Share Posted May 9, 2015 TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. How did you find question 7? Reply Link to post Share on other sites More sharing options...
superspeed49 Posted May 9, 2015 Author Report Share Posted May 9, 2015 Yes I m TZ2 and I did Question 7 and Question 8 (second and third question in section B). The question on magnetic fields was quite difficult for me, I couldn't find the time. Paper 1 was way harder... hoping paper 3 is easy... For question 8, what did your graph for momentum looked like? It started from 15.7 kgms^-1 passed through zero and at the endd of the time it arrived at -15.7 kgms^-1. I did a curve, as the F is changing (hence gradient of the graph was not constant). What did you do? Reply Link to post Share on other sites More sharing options...
Sofia. Posted May 9, 2015 Report Share Posted May 9, 2015 Because it would then be a circuit, so current will flow. According to Lenz's law, the force created by that current will oppose the force that created it, which was the force downwards. So suddenly, there will be a force upwards which slows it down. Oh, right... I never would have guessed that.... TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard.I and most of my classmates chose Q7 and Q8 too- as they seemed the easiest ones. 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! Reply Link to post Share on other sites More sharing options...
whydidiprocrastinate Posted May 9, 2015 Report Share Posted May 9, 2015 TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^2x^2 to get the mass and got 3.something :/ Hbu? Reply Link to post Share on other sites More sharing options...
Sofia. Posted May 9, 2015 Report Share Posted May 9, 2015 TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^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. TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^2x^2 to get the mass and got 3.something :/ Hbu? Also, how did you draw the graph for the KE of particle B? Reply Link to post Share on other sites More sharing options...
superspeed49 Posted May 9, 2015 Author Report Share Posted May 9, 2015 TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^2x^2 to get the mass and got 3.something :/ Hbu? I used that formula too but i cant remember what i got (3kg you say?) Reply Link to post Share on other sites More sharing options...
ordinaryguy Posted May 9, 2015 Report Share Posted May 9, 2015 Because it would then be a circuit, so current will flow. According to Lenz's law, the force created by that current will oppose the force that created it, which was the force downwards. So suddenly, there will be a force upwards which slows it down. 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? Reply Link to post Share on other sites More sharing options...
superspeed49 Posted May 9, 2015 Author Report Share Posted May 9, 2015 Because it would then be a circuit, so current will flow. According to Lenz's law, the force created by that current will oppose the force that created it, which was the force downwards. So suddenly, there will be a force upwards which slows it down. Oh, right... I never would have guessed that.... TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard.I and most of my classmates chose Q7 and Q8 too- as they seemed the easiest ones. 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! I did the question on SHM and that on momentum. Which were those? Reply Link to post Share on other sites More sharing options...
Sofia. Posted May 9, 2015 Report Share Posted May 9, 2015 Because it would then be a circuit, so current will flow. According to Lenz's law, the force created by that current will oppose the force that created it, which was the force downwards. So suddenly, there will be a force upwards which slows it down. 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? Yep! Reply Link to post Share on other sites More sharing options...
ordinaryguy Posted May 9, 2015 Report Share Posted May 9, 2015 TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^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. TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^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 1 Reply Link to post Share on other sites More sharing options...
Sofia. Posted May 9, 2015 Report Share Posted May 9, 2015 Because it would then be a circuit, so current will flow. According to Lenz's law, the force created by that current will oppose the force that created it, which was the force downwards. So suddenly, there will be a force upwards which slows it down. Oh, right... I never would have guessed that.... TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard.I and most of my classmates chose Q7 and Q8 too- as they seemed the easiest ones. 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! I did the question on SHM and that on momentum. Which were those? SHM was 7, and I think momentum was 9 but I'm not sure. Reply Link to post Share on other sites More sharing options...
superspeed49 Posted May 9, 2015 Author Report Share Posted May 9, 2015 TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^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. TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^2x^2 to get the mass and got 3.something :/ Hbu? Also, how did you draw the graph for the KE of particle B? 1/2 the amplitude and 1/2 the displcement . YoU? Reply Link to post Share on other sites More sharing options...
whydidiprocrastinate Posted May 9, 2015 Report Share Posted May 9, 2015 It started from 15.7 kgms^-1 passed through zero and at the endd of the time it arrived at -15.7 kgms^-1. I did a curve, as the F is changing (hence gradient of the graph was not constant). What did you do? I got something completely different, although I'm sure that you're right. However, everyone I consulted so far about this question drew different things. I basically reversed the graph of impulse, which was obviously the wrong answer. Don't know what I was doing :L. I'm sure the question stated that you didn't have to state the values on the y-axis though. Or maybe that was for another question. I forgot Reply Link to post Share on other sites More sharing options...
Sofia. Posted May 9, 2015 Report Share Posted May 9, 2015 TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^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. TZ2 here. I thought paper 2 was a gift from satan, I don't know how you guys found it easy. I chose questions 7 and 8.Paper 1 was so-so. Did anyone get a ton of A's in paper 1? Or is it just me I'm really hoping paper 3 won't be too hard. 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=.5mω^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 Yep, mine too. Was a bit unsure about the quarter at first, but I think it should have been like that.. Hopefully Reply Link to post Share on other sites More sharing options...
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