Physics
For Physics Discussions
1,008 topics in this forum
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- 3 replies
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Hey guys, I recently got my lab report draft back based on an experiment on measuring specific heat capacity through a electric heater. From the criteria, I got a pretty decent grade for my DCP (data collecting&Processing), though I got a 1/6 for my CE (Conclusion & Evaluation) Is there any sort of way to improve the CE section, or any sort of tips to get a good score for this criteria?
Last reply by susanne, -
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I'm thinking of doing the Extended Essay about the solar energy. My goal is to heat a cup of water with it. I have to build a solar panel which I don't really know which type is the best. It's going to be a small cup of water. Which one is better? PV solar panel or Thermal Panels? Thermal panels might be better, i guess, but I don't really get the concept of it. Please help me
Last reply by yii yann, -
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I finished my two IAs for physics and was given a mark by my teacher for both which is recorded. But, I only handed in one IA to my teacher to be submitted to IB since I lost the other one. Does IB mark each internal assessment and give it a mark or do they only mark some IA of my class and use that to grade a mark?
Last reply by by.andrew, -
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Hi, I was just wondering if someone could explain to me what the difference is between a velocity-time graph and acceleration-time graph? And also, how to convert a velocity-time graph to an acceleration-time graph.
Last reply by HighOnLife, -
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ermhagerd im sweating like cow and I am breathing like a dog. My physics exam is in 2 days and I have to still study Nuclear physics and understand force fields and electricity..........GG I am aiming for lvl 6 converted....what is that raw? a 65%? I guess this thread is my form of achieving some level of catharsis.
Last reply by Nabz, -
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Hello everyone I wanted to confirm this with you cause I wanna see the min score to get a lvl 6 which converts to 90+ on my Ontario grade (report card). So the minimum amount of points out of 100 to get a level 6 is 60. Therefore I need 60 points in total to get a level 6 which is 90+ on my report card. So it is already confirmed, my Ia's are 22 points. 60- 20 = 40. So i need 40 points in total from paper 1,2 and three in total. Paper 1: lets say I get a 50% raw that is 10 points because the weighting is 20% of my final mark. Paper 2: lets say I get a 50% raw that is 16 points because the weighting is 32% of my final mark. Paper 3: lets say I get a 50% raw that is 12 poi…
Last reply by Anton, -
Question to Physics Data Booklet(SHM)
by Guest ddaad- 3 replies
- 748 views
Hello guys, I am reviewing and I have an important question. Why are the the equations for the displacement in the data booklet x=x0sinwt and x=x0coswt? since they obviously give different answers how do I know which one to use? Best regards
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just wondering... are we allowed to use calculator for paper 1?
Last reply by ggMan, -
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Hello guys! So as we all know (hopefully), we have paper 1 and 2 this monday, I'd love to have a list to help me cross out topics that I already feel prepared for, so does anyone have a list of the topics that are included in paper 1 and 2? Even if its not complete it would be a huge help... thanks! And good luck everybody!
Last reply by ggMan, -
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I know that this might not be about IB Physics but since IB physics is much harder than SAT 2 Physics, explaining these questions to me might have any difficulty, right? Please please! I really don't understand these! 1. A wooden crate is pushed across a concrete floor at 5m/s and released. It slides to a stop after moving a short distance. The same crate is filled until it weight twice as much as it did previously and again slid across the floor at 5m/s and released. The stopping distance for the crate will be: A. 1/4 as far B. 1/2 as far C. the same distance D. twice as far E. four times as far (The answer is C) 2. During a company picnic, 6 accounting department work…
Last reply by lolipop_choc, -
- 1 reply
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Hello!!!!!! physics exams are in less than a weekk OMGGGGG so freakin out!!! I really really need help with topic 8 calculation questions, i think those are the hardest for me, Anyone have tips for them? Is there more formulae that I should know in addition for those which are in the data booklet? Tips for the correct formulae manipulation? For example: P2 SL(N11) The inhabitants of a remote island decide to install a tidal water storage scheme toprovide electricity. This scheme is based on the storage of sea water in a tidal lagoonwith the controlled release of the water between tides.(b) A lagoon is to be constructed to hold back the tide. The tide fillsthe lagoon twice…
Last reply by Award Winning Boss, -
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Can solar cell convert energy directly to heat? I mean, I want to use solar cell to boil water. I don't really know if it is possible to heat it directly or it has to convert into electricity first before convert to heat energy. Please! I need help!
Last reply by I-Bugger, -
- 1 reply
- 600 views
With the physics exams drawing near, I'm wondering what I should focus on. I don't feel confident that I know all my concepts, especially atomic (SL & HL), fields & forces + motion in field, and my options. But I heard that practising is important as well. So how should I use my time?
Last reply by Sandwich, -
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I am a SL student, I don't have a very good teacher, I can go onto many examples as to why but basically I need to teach myself physics, I have the fifth edition of "physics for the IB diploma" for standard and higher but it sometimes gets very confusing in its explanations... the questions confuse me as well because they seem to throw random things in there.. Perhaps I just need help understanding the equations fully, all the symbols and meanings and where to look for them in questions. Is there anywhere, any websites or books, or any approach to learning physics you would suggest I start? my exam is a year away, I need help now or else I fear I will barely get a level 3
Last reply by Black Bird Lockheed, -
- 8 replies
- 928 views
Hey guys, I'm really scared for my Physics exam and what makes it even worse is that i'm not that good in maths! So any advice on how to tackle the papers, especially paper 2? :/
Last reply by -._._.-, -
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hey guys Are we allowed to use the formula booklet for paper 1? :/
Last reply by The Rainbow Connection, -
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I have a lab report which is related to refraction and Snell's Law. Part of it involves measuring angle of the incident ray and refracted ray with respect to the normal. This is simple enough, and I have found the uncertainty of the angle to be 0.5 degrees. I must calculate the sine of the two angles and the uncertainty of the sine. I couldn't figure out how to do it the calculus way (Taylor), so I just evaluated the sine function at max and min values and calculated the difference between them divided by two. Δ=∣∣sin(θ+Δθ)−sin(θ−Δθ)2∣∣Δ=∣∣sin(θ+Δθ)−sin(θ−Δθ)2∣∣ What would be the significant figures of the resulting uncertainty? EDIT: LaTeX is weird, I'll try to fix it…
Last reply by flinquinnster, -
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I have a question concerning my lab report. i do not know where shall I indicate that sth is used as a constant, and the value of that constant. Now I am writing a Lab Report concerning determination of power of the kettle. The gradient of my graph is equal to m=P*c^-1*m^-1, where "P" is power, "m" is mass, and "c" is specific heat capacity. "c" is used as a constant in my calculations. It is worth noticing, that I do not need to use that constant in collecting, processing, and presenting the data (table with independent variables with corresponding dependent vars). I use constant only in calculating the gradient and determining power, that is, it takes place in the Concl…
Last reply by flinquinnster, -
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Guys, I am having my IB final exams in less than a week and I am having a panic attack ! Can you guys please help me by telling some revision techniques that i could use for my Ib Physics Sl Paper 1 It would be of great help ! Thanks a ton
Last reply by Award Winning Boss, -
- 4 replies
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I did a practicle and claculated time, then i had to do some more calculations to calculate 1/time so i had to calculate the precentage uncertainty. My question 'is the uncertainty absolute or relative and why...how do i know which one it is?'
Last reply by susanne, -
- 5 replies
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Hey IBS. I'm a student that is taking the exams on Nov 2012, and i'm very worried as we haven't finished the IB Physics course, so i was planning on teaching myself two options. Which one do you think that are the easiest? I was planning on doing Option A and Option B. I'm a very math-inclined girl, so i would like an option that is related to a lot of exercises. Is Option A really that hard? I've only done the eye and sight part. On the other hand, is Option B easy? Thank you, i don't know what to do right now!
Last reply by ChocolateDrop, -
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Hi, I just did a january exam in IB1 for physics HL and got a 4. I revised by going through past papers and practising these questions, and going through definitions. What else could I have done, and what should I do for next time? Thankssss
Last reply by googly, -
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I am doing HL Physics next year and I was just wondering- Do you use a lot of chemistry in HL physics?
Last reply by MLI, -
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Hello there, I was wondering if somebody had basically every single formula you could possible use with all of the derivations for IB Physics SL. The actual data booklet seems to provide little help to me as I frequently need access to formulas that are not in it. I would greatly appreciate it if somebody had a definitive list of formulas. Thank you!
Last reply by IBTutorOnline, -
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I've managed to plot my graphs, but I'm mystified about how get the error bars there. Thank you for your help!
Last reply by dniviE, -
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So, i was pretty set on taking Chemistry until 10 minutes ago when I heard someone say that Chemistry was harder than Physics. I don't really have a preference, to be honest I'm not much of a science person and I really just want to get a good grade... I would be taking either subjects at Standard Level.
Last reply by pasi, -
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HI I am doing Physics HL and I have about one month left for the FINAL EXAM. I am not really good at it; I feel that my average grade is 4, although my predicted grade is 5. We know that you have to practice a lot of past paper questions to get a good grade, but what if I start studying it really hard from now plus doing a lot of past papers? Will this help at this moment to get a high grade or not really? Because sometimes I feel that physics needs to be practiced and studied step by step not all at one time! Thanks
Last reply by Tahsim Ahmed, -
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What has a higher potential energy ? Liquid water at 0 Celsius OR Ice at the same temperature Both have the same mass ! Im just slightly confused on this topic. Please help
Last reply by Ibraheem Pk Nofal, -
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Hi, i am doing math studies with physics at higher level, but i was wondering if there is anything learnt in either math higher or math standard that i would need to learn for physics that i wont learn in studies, i am capable of math standard, but it is only the fact that i probably get a 4 or 5 at math standard and 6 or 7 at studies. I will ask my form teacher (who teaches higher and during form gives us some questions from the higher level optional networking topic from higher before school to work out). What do you think he'd need to teach me that isn't in the studies syllabus.
Last reply by bale, -
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Hello I have this doubt omg may 2013 is coming and our physics teacher didnt teach us the options yet (going to kill her) She chose: - Option A: Sight and Waves Phenomena - Option B: Quantum physics and nuclear physics what du u guys think? Its ok? pretty hard? pretty easy? what do u guys think is the perfect options match?
Last reply by Komandos, -
- 3 replies
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Hey ppl i have my mock in physics tomorrow. The teacher gave us today Paper 1 and 2 exams from May 2012 ... TZ1 and TZ2. Tomorrow i have my paper 3.I already have the may sessions, however I think he will include the november too. Soo it would be realllyy helpful if anyone has them!! So huge help is required here Thanks in advance!!
Last reply by Komandos, -
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Hey guys please give me some suggestions to design a lab based on wave phenomenon, like resolution , diffraction , polarization.
Last reply by Siddharth Rajendran, -
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What is the best way to check you have completed all the criteria? When ever I check with the guide it appears to me that I have completed everything I even look at samples to find ideas to help me improve my structure of my IA. However whenever I give my IA I get 5 as my max mark. Is there any method you could suggest to me to make sure I have fullfield ALL my criteria?
Last reply by bale, -
- 2 replies
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Hi all What are some interesting topics that are good for Physics IA?? Please not something to thermal physics, as I have done alot of experiment on that. But something related to force, motion, etc. Thanks for all the help!!!
Last reply by bale, -
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I have written all 6 lab reports our teacher gave us last school year (current, resistance). This year he gave us 6 more (wavelenght, refraction etc.) + we have to work on our design ones. I have an almost infinite to do list, am I allowed to send 4 from the first school year + those 2 design?
Last reply by Emmi, -
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Hi! I am doing the Extended Essays at the moment. I have to finish this at the end of September (I guess...) I just chose the topic of by EE. It's about the solar energy and how to use it to boil the water. I will focus on what material is the best for making the solar panel for boiling water. Now, the problem is I don't know what to do! I don't know how to build the solar panel and I don't know that it is possible or not to build one and use it to boil the water. I need at least some guide to complete this thing. In order to boil the water using solar energy, does that mean I have to convert the energy into electric energy and then convert it into heat energy? If ye…
Last reply by flinquinnster, -
- 6 replies
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I just completed an internal assesment that was measuring the time it took for a slinky spring to complete an oscillation as it was streched. For my improvements I stated that it would have been better if the material of the slinky spring was fiber instead steel as it would have a greater elasticity and therefore I would have been able to increase the range. Then i stated that young's model could be used to show this and stated that as the limit E tends to 0 the material deforms faster.The link shows the graph http://en.wikipedia.org/wiki/File:Metal_yield.svg Could somebody tell me if its right or i messed everything up?
Last reply by bale, -
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- 535 views
Alright. I'm doing an experiment where results are calculated as an average of 30 measurements. These range between 100-900. The final result is around 800. The question then is, how should I report the uncertainty? I was taught (max-min)/2, but 800±400 seems strange, especially since in doesn't include 100-400 Also, the unc should only have 1 s.f., but this means all but 1 of my results would equal 800±400. This is for my extended essay btw. Should I just mention that all the results have the possibility of having an uncertainty range of 100-900?
Last reply by JackalJack, -
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I overestimated my math and science skills and am enrolled in an HL Physics course. I've only been in the course for two months and I'm already struggling and having trouble with the hw. I understand the lessons and concepts in class, but when it comes to doing the actual problems, I can't seem to figure any of them out. The lessons in class go by very quickly, and I do go to extra help but there's only so much time that can be spent going over problems. What can I do to understand physics better? Any websites or tips for improvement?
Last reply by TykeDragon, -
- 1 reply
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im supposed to sketch an acceleration vs time graph for the following situation: Two forces F1 and F2(t), act on a mass m 1.0kg. Force F1 is to the left in the negative x-direction and force F2(t) is to the right in the positive x-direction. F1 is constant with a magnitude of 1.0N whereas F2(t) has a magnitude of 2.0N for the time interval 0.0s ≤ t ≤ 5.0s and drops to zero after 5.0s. The mass is at rest at time t = 0.0s how do i approach this problem? thanks
Last reply by HiggsHunter, -
Lab Report Uncertainty for zero value?
by Guest- 2 replies
- 1.4k views
Hello! I just started off doing my first labs one of which is determining resistance of an unknown resistor by using the Wheatstone bridge. One of the cotrolled values is the value of the galvanometer which at all times should show 0. As I regulate it manually every time I change the independent value (resistance of a variable resistor), should I still indicate some kind of uncertainty? Thank you!
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My class teacher has started with OPtion F: Communication in school. However I am not able to understand the topic quite well. Can anyone please help me gather some resources for this topic that help me understand this unit better ? If so it would be really nice because i really need help with it. Resources in the form of word notes, powerpoint presentations, videos on the topic etc will be just fine. Please Help Guys !
Last reply by The Rainbow Connection, -
- 2 replies
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I need help with my physics IA that i have done on Solar Cells. Independent Variable: Area of exposure of Solar Cell to Light source Dependent Variable: Power generated per unit area I need help with the Conclusion and Evaluation as well as Improvements part of this IA. Please give me general suggestions if possible. I am in a big mess and need help as soon as possible Please Help !
Last reply by dhruvmalhotra95, -
- 6 replies
- 2.8k views
I have Physics at SL along with Biology and Chemistry at HL. I currently have seven subjects because I have all three sciences. Do I really need to take physics or can I drop it and concentrate on the other six?
Last reply by cricketcrazynerd, -
- 7 replies
- 931 views
I dont want to insult her but she's a b------------ 2 fridays ago, she make all IB physics students (SL) make 6 labs!!! 6!! in one day!!! And she expect we give her the labs report tomorrow (so good! I'm so not doing that for tomorrow) You may say 2 weeks is enough but this 2 weeks were so heavy with the others assesment that I forgot to this, plus I hate her!! so I "forgot" that intentionally hahaha The worst part is that we already have 13 labs report (i think is enough), plus this 6 will be 19, but what makes me want to kill her with a knife is that she wants the labs with design, data collect and conclusion................. ALSO she wants 2 more labs in the next weeks…
Last reply by Nabz, -
- 4 replies
- 1.4k views
Hello! I need help with my physics lab report because i have no idea how to work out the uncertainty. If my experiment gives 3 values for 3 different trials: - 340±14 - 350±15 - 360±16 So that the mean would be 350 but what is the uncertainty of the mean? I did google this and found 3 possible ways of doing this: (360 – 340)/2 = 10 (using the range of the all the values) ((360+16) – (340 – 14))/2 = (376 – 326)/2 = 25 (using max and min values) (14 +15 +16)/3 = 15 (using the uncertainties in the values) So what method should I use? Should I quote the answer as 350±10 or 350±25 or 350±15 ? and why? Thanks for your help.
Last reply by Yolo Swaggins, -
- 4 replies
- 1.1k views
Hi, I recently got accept in the IB diploma program, I will begin the program next year. But was looking at the courses and they don't offer Physics HL , only SL. Currently physics is my favorite class and I find it sad, but what is the difference between SL and HL? I really love physics, I would like to become physicist.
Last reply by JonathanL, -
- 3 replies
- 9.1k views
So hello fellows! I have searched the internet around to find any good ideas for a design lab in physics since my physics teacher told us today that we should perform the last design lab today (yeah, great planning I know) however we could also do it at home. However my fantasy sucks and since I'm not that good in physics either I have no idea what I should do, we have already done a "ball- design lab" and a "spring- design lab" but now we are allowed to do anything we want. Therefore I ask you if you can provide any help, like a lab with microwave or something and how this may be applied on physics? It would be great with like as many different ideas as possible
Last reply by Landin, -
- 4 replies
- 5k views
I have a question about significant figures which is really bugging me. It is probably really simple though. This is a general question but I will demonstrate it using an example. Given u=8, v=0 and a=10 (ie gravity as quoted from question). find distance. so, s=(02-82)/2(-10) The textbook gives the answer as 3.2m. However my question is that, as u=8 is only one significant figure wouldnt the answer be 3m? Also when doing a prac and you get a range of figures, e.g. 12.09, 12.20, 11.87. You then give the average to 4 significant figures? If you then, in the same prac, have smaller figures, e.g. 9.03, 9.05, 9.06. Do you have to give this average to 3 significant figures? an…
Last reply by flinquinnster, -
Help physics problem
by Guest desilaura- 3 replies
- 778 views
I've been stuck on this question: Two cyclists drive a distance of 15km. One of the cyclists drives 10km h faster than the other one and arrives at their destination 20 minutes earlier. What are the speeds of the cyclists? So far I got: Speed cyclist A = 15/x-1/3 Speed cyclist B = 15/x 15/x-1/3 - 15/x = 10
Last reply by HiggsHunter,
