Physics
For Physics Discussions
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Hello IB physicists! I just made an app that includes comprehensive notes for the 2016 first assessment IB Physics syllabus. The app has detailed notes with colorful pictures for all topics plus option D (astrophysics) (engineering physics coming soon) and are made perfectly according to the new syllabus by subtopics so it makes sure that you don't miss out any content that you need to learn for the exams! The link to the app is https://play.google.com/store/apps/details?id=io.gonative.android.qnjjl&hl=en. Feel free to check it out! Happy revising! :') Update: All notes are also available on https://ibphysics.org/!
Last reply by SamirAliyev, -
Hello people, Are there any sites with Physics IB exercises to practice on? Not past papers.
Last reply by IBsciencewhiz, -
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Update (May 2014) - Added all of topic 3: Thermal Physics I've been an IB teacher for many years, and enjoy helping out more than just my own students. With this in mind, I am working on a series of free videos on my own studynova website (they are all free there, plus you can get all the notes I make), but am also mirroring them on Youtube. These videos are about specific topics within the IB Physics SL or HL curriculum. So if there are specific topics that you'd like to see done in detail with lots of examples, just post it in this thread. I'll take a look and see if there is any overwhelming consensus on any topics, and then start doing videos on those ones. I can go…
Last reply by lizgrey, -
Physics HL/SL Help 1 2 3 4 22
by Drake Glau- 420 replies
- 91.2k views
There's a biology and chemistry help thread, figured a physics one would be appreciated by a few people Hoping some people will check here and help people who have questions, I'll try my best but my knowledge of physics does not go very far honestly and it's not my best science
Last reply by evan11, -
Thought I would follow the trend and make one of these threads for poor, forgotten Physics. B) My class is doing Biomedical Physics and Optics. I actually think there are a lot of fascinating options for Physics. I was reading through my textbook, and the one where people fly into outer space and age slower is really interesting. Not that I believe that it would actually happen. I don't care which genius came up with that theory, I refuse to believe it. Prove me wrong.
Last reply by Magician, -
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by Guest Vidhi Joshi- 0 replies
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For my IA, I need to do an experiment about bicycles. I'm struggling to find a really good idea for my practical so I would really appreciate some guidance. Any ideas? =/
Last reply by Efahey, -
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Hello, I've done an experiment where I investigated how the length of an conducting wire (in this case an iron wire) affects its resistivity. I know, according to theory, that the length is proportional to the resistance but how could I compare it with my own results? The R-square value of my graph is 0.9996, almost 1, which suggests that it seems to be linear. But again, to the question: How could I compare my results with theory? In chemistry it's just looking up a certain value in the Chemistry Data Book, but in physics you often investigate relationships. And how do you compare that? Note: I can't compare the resistivity constant since I did not measure the temperatur…
Last reply by IB-Adam, -
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I've seen a few: Question B1, Part 2, (a) In the question, we are given a ratio of areas. According to the syllabus itself, the magnification is a ratio of lengths, so when calculating the magnification, one must take the square root of the ratio (taking the square root was omitted from the mark scheme). If we take the square root, the indentations of the leaf will actually be resolved. The question should either refer to the lengths of the leaves or the values of the areas must change so that the question is correct. Question B2, Part 1, © (i) The mark scheme says: number of atoms in 1 kg of carbon =12 x 1000 / N_A number in 1 kg of U-235 = 235 x 1000 / N_A If that was t…
Last reply by Tilia, -
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First of all: hi everyone (even though I read this message board for longer time this is my first post ;d) I'm writing my physics lab report for simple experiment involving dropping the ball from particular height and measuring the height after it bounces off the ground. I've got a problem in identifying the controlled variables. It's obvious that the thing kept constant is the floor, but how to express it in the means of variables? My professor said that all variables should be physical quantities and hence saying that controlled variable would be simple the material of the floor is wrong. I can distinguish things like hardness or density but it's still not precise an…
Last reply by Joey, -
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So, so far my top grade for a lab report was a 16, but that was last year (10th grade) and now in my 2nd year of the IB (11th) The highest I've ever gotten is 13 and I don't quite understand what I'm doing wrong. Can anyone help me with an outline or example? Thanks
Last reply by Tilia, -
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Hello all! I'm revising for my tests and I am in demand of an explanation on projectile motion. Does anyone know a good site that explains it? Or any suggestions? greatly appreciate all help. Thanks!
Last reply by Darko, -
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I've checked the syllabus multiple times and the bohr model of the hydrogen atom seems to be removed, along with the derivations of Bohr's equations. Can anyone confirm this? (I see a lot of questions in past papers, and the Summary of Syllabus changes in the TSM says that the Nuclear and Quantum physics chapters are "mostly unchanged"). BTW, I'm HL.
Last reply by SharkSpider, -
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Hi, I'm having trouble calculating the uncertainties in an average value. I have obtained several values for VIt (Voltage x Current x Time) and wish to average the values. How do I calculate the uncertainty in the average value of VIt? The issue I'm having is that each value of VIt has a different uncertainty. How do you calculate the uncertainty in the average value if each value has a different uncertainty? Thanks, abarnes98
Last reply by kw0573, -
- 1 reply
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Hi, so I'm doing a physics lab where I'm given only the angle (theta), the range (dx), and the height (dy). First of all, I'm supposed to find viy (initial velocity) using vfy^2=viy^2+2gdy^2 then I'm supposed to find time using vfy=viy+gt, then vx us vx=dx/t. After finding all of that, I'm supposed to find vr and then angle then compare my measure angle to the one that I calculated. I have no idea where to even start. Could someone please help me out? My measures are as follows: dy= 13.5 cm dx= 12 cm Theta= 70 degrees g=100cm/s^2 Thank you so much to anyone who can help.
Last reply by Aflorcon, -
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Does anyone have May 2015 papers for Physics? I will be willing to trade other resources like textbooks, worksheets, question banks etc.
Last reply by purupahuja, -
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Hiya everyone, so my Physics teacher is making us work on our IA now so he can correct it and help improve it in the months to come, but our first draft is due this week. I don't have much experience writing lab reports or IAs, in fact our class hasn't done a single lab report so far, so I've just been going through my friend's IAs from last year to get a sense of what to do. My problem is that this year our IA is supposed to have an introduction with a meaningful heartfelt reason for why we chose our individual experiments. I'm not really sure how to write this, my experiment is based on the effect of shade on solar panels and I've always been passionate about renewa…
Last reply by pieispi, -
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The syllabus changed for the 2016 physics exams... The textbook we use in school, Oxford Physics textbook, doesn't provide much of good definitions. How are you studying for formal definitions??
Last reply by So Young, -
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Does anybody have extended solutions for the 2016 Specimen Paper 2? I found notes for Paper 1 but not for Paper 2 (only brief answers without any explanations) Thanks guys and good luck on friday Edit: I am asking because the official mark scheme has so many mistakes in it.
Last reply by MarcoL, -
2016: Physics HL vs SL
by Guest- 9 replies
- 3.6k views
Hey So i read/ heard from quite a lot of people that the IB Physics HL syllabus got "watered down" for the first examinations in 2016. My question: Was only the difficulty/ work load of the HL course decreased or of the SL course as well? Thanks
Last reply by Lynxarin, -
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a) car runs into a wall and stops... where does the momentum go (cant be destroyed or created)??? b) you are on skates. someone throws a heavy ball? how does your speed compare to the base??? why? c) I am on frictionless ice will my bagback. How I can move (slide) before i freeze??? thanks
Last reply by Drake Glau, -
- 5 replies
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Hello, I wonder wheter it is easier to get 7 at Physics SL or 4 at HL. I have still the time for changes my subjects, so I need your help It would be great if I got the answer from sb who graduated from IB. Cheers
Last reply by sushichan*-*, -
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I'm an IB Physics teacher who has been teaching for 10 years, and now I'm working with the IB to help them develop a new Astrophysics Option. Rather than just design it based on what I think you want, I thought I'd actually ask you for your opinion! Here's your chance to have a say about the new syllabus! I am including student opinion to help decide which topics are kept in, which are taken out, and also which topics you'd like added. There are two things I'd very much appreciate your help with: A) First, if you could redesign the astrophysics option, which topics would you find most interesting? Please just write down which of the topics from the list below you think …
Last reply by AndreaRuiz, -
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Dear IB Students, I am a Tutor in Physics (IB and A-Levels). Being very booked these past few months, I was not able to respond positively to all requests for help. So, I decided to create an educational YT channel that everyone could use to refine difficult concepts and train on exam exercises. It is still in its infancy, with only one series (Circular motion) completed, and one in preparation (Atomic Physics – a couple of videos are online, more to come). It will most certainly be a yearlong project before I cover everything, so any feedback from you guys in these early stages would be very useful, it will allow me to create even better free lessons for the co…
Last reply by Physics Tutor, -
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A problem from my Physics book, written by stupid Tsokos. A helicopter rotor whose length is R = 5.0 m. pushes air downwards with a speed v. Assuming that the density of air is constant at p = 1.20 kg m ^ -3 and the mass of the helicopter is 1200kg, find v. You may assume that the rotor forces the air in a circle of radius R (spanned by the rotor) to move with the downward v. Answer: The momentum of the air under the rotor is mv, where m is the mass of air in a circle of radius 5.0m In time (change in time), the mass is enclosed in a cylinder of radius R and height v * (change in time). Thus, the momentum of this is p * 3.14 * R^2 * v^2 * (change in time), and its …
Last reply by IB-Adam, -
- 1 reply
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hello everyone, I had done a physics ia experiment and the thing is my aim and the result didn't match quite much. My hypothesis was proven kind of wrong, there were no obvious relationship and now I don't know whether I failed my ia or not. I know how to explain that graph but still there is no relationship. Anyone knows whether I'm still on the right track or should I simply change the whole ia and do it again. thank you for any advice
Last reply by kw0573, -
- 4 replies
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We did this series of experiments where we manipulated Pressure, Volume, and Temperature. Each of the three experiments had one of those variables constant. So now we have to do a lab on it and no one knows what to do. Our teacher said to make 9 graphs, each combo of the three variables in each experiment, and continue the line to zero Kelvins. But that doesn't really make sense to me. Wouldn't someof those just be straight lines? Wouldn't a bunch of them not pass through 0? How can you extrapolate when it's so far away from the trials you did? I asked all my friends and all I got were mixed, uncertain, and contradictory answers.
Last reply by Grumps, -
- 2 replies
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Hi, I wanted to include a physics example in my TOK essay, but since I don't take physics, I decided to ask for a little help. I want to write abt Abraham-Minkowski controversy. Obviously, I've done some research and I know what it is about. But I can't find any information what it applies to in general. I mean, if it was definitely resolved (some are arguing that it actually already is) what would the results mean? And what new does the "more correct" equation bring to physics? Maybe they both do but in different ways? I just need a simple explanation, if anybody has any idea about that I would really appreciate your help.
Last reply by maereth, -
- 3 replies
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A proton is accelerated from rest through a potential difference of 1000 V. What is the potential difference through which an alpha particle must be accelerated to gain the same kinetic energy as the accelerated proton? Thanks in advance
Last reply by Fiz, -
- 1 reply
- 610 views
The real value of g found is (9.807 +/- 0.7) ms^-2 In an experiment, the value is found to be (10.4 +/- 0.7) ms^-2 State, with a reason, whether the experiment is accurate.
Last reply by IB`NOT`ez, -
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how does air resistance affect the motion of an object? how will the speed of the object change over time if there is air resistance? how will the acceleration of the object change over time if there is air resistance? is air resistance a constant deceleration? please, I need to understand this. thank you!!
Last reply by HiggsHunter, -
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Hey people, Can anybody help me by determining a factor that has certain incidence in the falling time of a parachute taking into account air resistance? My teacher gave me some restrictions so I cant vary the area of the parachute, the mass that is tied up to it or the suspension lines, any ideas? Help will be appreciated, if the independent variable can be original, it would be better. Thank you beforehand
Last reply by Procrastination, -
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I find the current IB HL Physics book some what dry. It lacks information about many of the examples it does, and why things the way they are. Does anyone know of a better book that could teach me deeper into each of the subjects?
Last reply by The Economist, -
- 1 reply
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I struggle the most with the mechanics part of the course and I dislike to get dirty with deriving equations, especially since Im slow. Could I not just remember the equations for let´s say, projectile motion that are not included in the booklet and just plug in in stuff during the exam, or will I be penalized?
Last reply by IJustWanaPass, -
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So basically the criteria for the internal assessment topics seemed so ludicrous that I put them off until the last minute because because I simply could not think of an adequate topic. I must start and finish an entire physics IA and a chemistry IA(both SL) by Monday, and I would prefer to use a virtual simulation(using algodoo) to run a basic experiment just so I can get some points. If I get at least some points on the IA, I should be able to secure a passing grade since I am confident I will get 6s and 7s on each paper for exams, and I will happily settle for passing. Also, I would like some clarification on the subject of IA topics. Are we supposed to basically exp…
Last reply by ShivaniVino, -
- 0 replies
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Hello Physics Students, I just made a comprehensive app for IB Physics post 2017-2018 Syllabus. The app is completely free and it has a lot of useful stuff. 1. The app is very light so you won't be losing a lot of space 2.The app has most of the Syllabus content and plus detailed videos for every chapter and every topic. 3. Key terms and all definitions specific for every chapter. 4 If you feel confident enough, you can test yourself with past papers, Quizzes, and Tests right inside the app. And if any of you are having problems, you can contact me through the app at any time. The Link to my app: https://play.google.com/store/apps/details?i…
Last reply by SamirAliyev, -
- 1 reply
- 823 views
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, -
- 2 replies
- 622 views
Hi! I would like to ask you how many days after the day of exams we can download the papers of Physics in internet or IBO store?
Last reply by Physics_world, -
- 1 reply
- 968 views
Yooooooooooo! I've once again found another question about waves that I'm unable to answer. This one is from November 2009 HL paper 1. I know how to do number 14, that's a pretty basic one; however, I'm stuck on number 15. The answer is supposed to be B (0.8 cm), does anyone understand how to get to that answer? If so, could you explain? Thank you in advance CHEERS!
Last reply by HiggsHunter, -
- 1 follower
- 0 replies
- 409 views
I am going through questions in the Tsokos textbook, but cant find any reliable way to see solutions to my answers, as well as explanations. Does anyone have any idea on where I can find explanations for questions? Thank You.
Last reply by HasYas12, -
- 3 replies
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Well, as the title says, our teacher told us that we had to do a lab on heat transfer and global warming. I'm not half bad at designing a procedure, but I have absolutely no idea of what to look at in the lab. Our school doesn't have much in the way of equipment, but we do have turbidity sensors, heat sensors, and barometers, as well as the rest of the physics stuff. Anyways, anyone know of any testable relations or ideas that relate to heat transfer or global warming that could make a good lab? We're allowed to take ideas for research questions from wherever, provided we make our own specific question and procedure, and carry it out ourselves, drawing our own conlcusions…
Last reply by Hedron123, -
Any one made any topic wise tests?
by Guest Jar Jar D'oh!- 3 replies
- 917 views
Hey! Let me elaborate, what I mean by the title is that, have any of you made any segregated .docs for each section in physics, lifting questions from past papers or exercises or whatever. It'll be beyond excellent, if you could post them to this thread, because in the coming month people will rush here looking for some last minute revision. This will help everyone, so please contribute! Thanks!
Last reply by Jasmeena, -
- 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, -
Any tips for Kinematics?
by Guest Loco Mo Mo- 2 replies
- 2.9k views
With my newly found motivation (thank you HiggsHunter), I've been doing some practise questions for all the topics. I seem to be having some problems with Kinematics (well most of Mechanics to be honest). I think the main problem is I can't identify what the question is asking and which formula I should use. Because when I look at the markscheme, I can understand all the calculations done but almost always fail to use the right equation. Thus, I was wondering if any of you had some tips or tricks you could share to help me with this. PS I would usually just say 'screw this' but since this topic comes up almost every year, I can't Thanks
Last reply by omri, -
- 2 replies
- 618 views
The reasons why I chose to do Physics originally is because I didn't have to memorize names of different kinds of cell like in Biology. Physics has always been easy to me since I could normally survive the class by learning "concepts". However it seems like IB Physics isn't designed to be that way. Does anybody has any tips on memorizing definitions of Newton's Laws, Emf, flux, entropy...and the other 9999 terms on the syllabus?
Last reply by Maple, -
- 3 replies
- 1.1k views
Hello everyone! I know that our IAs are supposed to be corrected by our teachers and that not all of them get sent off to moderation. I have also heard, that even if you apply for the IBO to regrade your exams, they won't look at you IA again. Now, this presents me with a problem in Physics, as, my teacher is... well. Not qualified to teach IB for several reasons. She doesn't understand some of syllabus, she barely speaks English, and she also happens to hate me for "being always late" which I actually am most of the time, because I noticed an inversely proportional correlation between my time spent in her classroom, and the grades I got on topic specific tests.…
Last reply by Rey, -
- 7 replies
- 1.2k views
So I'm done with IB, and I'm pretty bored at the moment until I go to uni. I want to learn how to make cool stuff with electronics, and i don't think Physics HL taught me very much. I am wondering if anyone is good with electronics. How should i further develop my knowledge in electronics after IB physics? I want to actually make stuff but i don't know where to start. A lot of the stuff on the internet look pretty complicating. Any got any ideas? thanks! GOD
Last reply by Emmi, -
Are the physics options fixed?
by Guest Loco Mo Mo- 2 replies
- 1k views
What I mean by that is, we've covered quantum/nuclear physics and Astrophysic in class but I was wondering if I had to stick to these for the exams. Could I self learn an option which is "easier" and answer them in the exam or does my college like say beforehand to the examiner which questions I'll be answering. Also, that being said, I've been doing some research into which options are easier and it seems EM and Optics come up quite a lot. However, I think Optics is no longer on the course? What are your opinions on which options are "easiest." Thanks
Last reply by Drake Glau, -
- 5 replies
- 2.3k views
Attempting the practice questions in the Tsokos book, I can hardly do any of them!! Why are they so hard?? :'( Yet, in the exam I can at least answer most of the questions. Does anyone else find the Tsokos questions near impossible?
Last reply by pravzcool,