bynary Posted May 10, 2016 Report Share Posted May 10, 2016 Now that the 24h period is over, how did you guys find the physics paper 3? I did the relativity option and found it pretty easy Reply Link to post Share on other sites More sharing options...
YANA Posted May 10, 2016 Report Share Posted May 10, 2016 I did engineering physics. Quite easy. My other friends did astrophysics and they said that was easy also. looks like it was easy in general. why paper 2 was so hard IB... why... 1 Reply Link to post Share on other sites More sharing options...
Guest SNJERIN Posted May 10, 2016 Report Share Posted May 10, 2016 I thought that the engineering option was extremely easy. I was expecting some tricky Bernoulli applications but nothing on that came. Section A, I thought, had some tricky questions. In particular when they asked about the range of values of t for which the hypothesis hold, most of my friends neglected the fact that the x-axis was the inverse of time and so they wrote 0.05 ≤ t ≤ 0.15 where it should actually be 6.7≤ t ≤ 20. Reply Link to post Share on other sites More sharing options...
nina101 Posted May 10, 2016 Report Share Posted May 10, 2016 30 minutes ago, Haitham Wahid said: I thought that the engineering option was extremely easy. I was expecting some tricky Bernoulli applications but nothing on that came. Section A, I thought, had some tricky questions. In particular when they asked about the range of values of t for which the hypothesis hold, most of my friends neglected the fact that the x-axis was the inverse of time and so they wrote 0.05 ≤ t ≤ 0.15 where it should actually be 6.7≤ t ≤ 20. I neglected that too How about improving the measurement through shifting this device? I wrote that it will have no effect on refractive index. And what about the thickness of the glass? I wrote that the percentatge uncertainty will be smaller but that was just guessing. I didn't find that paper all that easy but I did well in P2 Reply Link to post Share on other sites More sharing options...
kevG Posted May 10, 2016 Report Share Posted May 10, 2016 It was much much easier, I might've over studied for it after seeing the bloodshed on P2 Reply Link to post Share on other sites More sharing options...
Guest SNJERIN Posted May 10, 2016 Report Share Posted May 10, 2016 (edited) 10 minutes ago, nina101 said: I neglected that too How about improving the measurement through shifting this device? I wrote that it will have no effect on refractive index. And what about the thickness of the glass? I wrote that the percentatge uncertainty will be smaller but that was just guessing. I didn't find that paper all that easy but I did well in P2 Oh, I am sorry to hear that. Actually, I almost made the same mistake. It was just that I had a 10min to spare once I have done all other questions and so I went through this part and spotted the mistake. You're right, the systematic error has no affect on the refractive index. As for the last question, I am not really sure, I was guessing here as well. However, I made the assumption that the refractive index of the glass was higher than that of the microscopic slider, thus the absolute uncertainty will be higher as well. And btw, did they ask for the percentage or absolute uncertainty ? I am pretty certain got this part wrong. Edited May 10, 2016 by Haitham Wahid Reply Link to post Share on other sites More sharing options...
kevG Posted May 10, 2016 Report Share Posted May 10, 2016 51 minutes ago, Haitham Wahid said: I thought that the engineering option was extremely easy. I was expecting some tricky Bernoulli applications but nothing on that came. Section A, I thought, had some tricky questions. In particular when they asked about the range of values of t for which the hypothesis hold, most of my friends neglected the fact that the x-axis was the inverse of time and so they wrote 0.05 ≤ t ≤ 0.15 where it should actually be 6.7≤ t ≤ 20. I wrote 0.05 to 0.15 too, but I said they were t^-1 values, so I'm still right, right? Reply Link to post Share on other sites More sharing options...
tashakappler Posted May 10, 2016 Report Share Posted May 10, 2016 I had Astro which was refreshingly easy in comparison to 1 and 2. I was actually kind of annoyed by how much I revised for it and there were very few questions to properly test my knowledge (it seemed easier than past papers?). I doubt it will make much of a difference in with my exam results though. Reply Link to post Share on other sites More sharing options...
bynary Posted May 10, 2016 Author Report Share Posted May 10, 2016 30 minutes ago, tashakappler said: I had Astro which was refreshingly easy in comparison to 1 and 2. I was actually kind of annoyed by how much I revised for it and there were very few questions to properly test my knowledge (it seemed easier than past papers?). I doubt it will make much of a difference in with my exam results though. Yeah I heard that the astro was almost too easy (if that is such a thing). Tbf paper 3 has 20% weighting, just as much as paper 1 so it could have a significant effect Reply Link to post Share on other sites More sharing options...
Guest SNJERIN Posted May 10, 2016 Report Share Posted May 10, 2016 2 hours ago, kevG said: I wrote 0.05 to 0.15 too, but I said they were t^-1 values, so I'm still right, right? I am reasonably certain that this is correct, provided that you have explicitly specified that in your answer, so doing worry about it Reply Link to post Share on other sites More sharing options...
bynary Posted May 10, 2016 Author Report Share Posted May 10, 2016 2 minutes ago, Haitham Wahid said: I am reasonably certain that this is correct, provided that you have explicitly specified that in your answer, so doing worry about it thank god, I did that too Reply Link to post Share on other sites More sharing options...
Polybos Posted May 10, 2016 Report Share Posted May 10, 2016 (edited) For the refractive index question I believe the refractive index will stay the same as the material is still the same. However the percentage uncertainty in each of the three values will be less(As absolute uncertainty stays at 0.02 while values get bigger). Therefore the percentage uncertainty in the refractive index will be less as well as the absolute uncertainty. Just to make it complete, I did the imaging option and it was also quite easy so I'm expecting some high grade boundaries. Edited May 10, 2016 by Polybos 2 Reply Link to post Share on other sites More sharing options...
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