IBsurvivor2015May Posted May 10, 2015 Author Report Share Posted May 10, 2015 (edited) @ibsurvivior downwards. My thinking was, that since the elevator is going down, it would add more force due to the accelration which could be shown as MxA and so mg and add the acceleration of elevator going down = mg+ma? tell me what you guys think? If it was going downwards then that means that mg - T = ma, since Mg > T.So -T = ma - mgT = mg - ma Edited May 10, 2015 by IBsurvivor2015May Reply Link to post Share on other sites More sharing options...
IBsurvivor2015May Posted May 10, 2015 Author Report Share Posted May 10, 2015 What did u guys get for the question with the pendulum?? The one that asked about when velocity is directed to the right?? Reply Link to post Share on other sites More sharing options...
Hassan76 Posted May 10, 2015 Report Share Posted May 10, 2015 What did u guys get for the question with the pendulum?? The one that asked about when velocity is directed to the right?? it was A Reply Link to post Share on other sites More sharing options...
aa557 Posted May 10, 2015 Report Share Posted May 10, 2015 Someone with TZ1? Reply Link to post Share on other sites More sharing options...
IBdonesoon Posted May 10, 2015 Report Share Posted May 10, 2015 Someone with TZ1?Yup, I did TZ1, I found paper 1 pretty hard but paper 2 was a gift from heaven compared to other papers... how did u find it? Reply Link to post Share on other sites More sharing options...
Guest Posted May 10, 2015 Report Share Posted May 10, 2015 Same as above, P1 was horrible, but P2 was pretty easy (although i still had a few questions wrong here and there). Reply Link to post Share on other sites More sharing options...
Hassan76 Posted May 11, 2015 Report Share Posted May 11, 2015 Same as above, P1 was horrible, but P2 was pretty easy (although i still had a few questions wrong here and there).Why wrong ? Reply Link to post Share on other sites More sharing options...
Guest Posted May 11, 2015 Report Share Posted May 11, 2015 Well there were some things i Same as above, P1 was horrible, but P2 was pretty easy (although i still had a few questions wrong here and there).Why wrong ? Well, there were some things i just did not remember very well, and i think they might deduct some points for that. Also i had only eaten a bit of cereal at like 7 am, and was doing paper 2 at 11 am, and i was starving, so i wasnt really taking my time with questions, since i was really eager to go home and get something to eat. Reply Link to post Share on other sites More sharing options...
aa557 Posted May 11, 2015 Report Share Posted May 11, 2015 Someone with TZ1?Yup, I did TZ1, I found paper 1 pretty hard but paper 2 was a gift from heaven compared to other papers... how did u find it?Yes I find pape 1 harder, I had to guess some questions, paper 2 was easier however I wasn't able to finish so I left a1 empty and I did question 7 for section B 1 Reply Link to post Share on other sites More sharing options...
IBsurvivor2015May Posted May 12, 2015 Author Report Share Posted May 12, 2015 What did you guys think about paper 3 in Tz2? Reply Link to post Share on other sites More sharing options...
RandomIBStudent Posted May 13, 2015 Report Share Posted May 13, 2015 What did you guys think about paper 3 in Tz2?Answered options B (Quantum physics) and E (Astrophysics) I found B had weird questions (find the current? wtf) and i wasn't able to prove the second calculation.Option E went very well though, it was easy. I'm hoping a 5 for physics... (overall) Reply Link to post Share on other sites More sharing options...
Eid Jazairi Posted May 13, 2015 Report Share Posted May 13, 2015 Yeah.. current is q/t .. since the charge of e is 1.6 x 10^-19 and you have x e's (calculated from the question above via eVs) then I = q of e x n of e. 1 Reply Link to post Share on other sites More sharing options...
Badalyan Posted May 13, 2015 Report Share Posted May 13, 2015 (edited) What about the quantum question: if the wavelength of the light is decreased when light is incident on the metal, show that the amount of emitted electrons will decrease? I think there was definitely a mistake in that question, because decreasing the wavelength will only increase the frequency and hence the energy of emitted electrons but not freaking decrease the number of electrons? What do you guys think? ps I did astro and quantum Edited May 13, 2015 by Badalyan Reply Link to post Share on other sites More sharing options...
IBsurvivor2015May Posted May 13, 2015 Author Report Share Posted May 13, 2015 (edited) What about the quantum question: if the wavelength of the light is decreased when light is incident on the metal, show that the amount of emitted electrons will decrease? I think there was definitely a mistake in that question, because decreasing the wavelength will only increase the frequency and hence the energy of emitted electrons but not freaking decrease the number of electrons? What do you guys think? ps I did astro and quantum yes, i thought there was a mistake as well. I couldnt make sense of that question either. I did option A and B. A was pretty much doable and some questions were easy but I felt that B was difficult this year. Some questions like the current one and prove that, I couldnt get them. Edited May 13, 2015 by IBsurvivor2015May Reply Link to post Share on other sites More sharing options...
Eid Jazairi Posted May 13, 2015 Report Share Posted May 13, 2015 yeah.. for the life of me I couldn't figure out the wavelength question.. even my teacher couldn't answer it.. Reply Link to post Share on other sites More sharing options...
aa557 Posted May 25, 2015 Report Share Posted May 25, 2015 Hey i need help for those who took paper 2 tz1, does someone remember the a3 question? What did they asked? Did they asked for the meaning o thermal energy o thermal capacity? HELP HELP HELP Reply Link to post Share on other sites More sharing options...
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