Physics
For Physics Discussions
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So for my Physics HL IA, I am planning to see how the number of magnetic stages, as well as the distance between the stages, in the Gauss rifle affects the distance travelled and velocity of the ball bearing that is launched. Is this a good topic or would it be too simple? Thanks in advance
Last reply by Exorcist55, -
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For my IA i need to derive this equation i dont even know where to start my question is How does the terminal velocity of a sphere through fluid depend on the fluids temperature? i know how to calculate these values, just how to i get to this equation. it was given to me in confidence but I need to prove in the write up thati know how to do this
Last reply by kw0573, -
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This book , the numercials are quiet tricky and hard .Guys help , my exam is next week .
Last reply by Mahrukh Z, -
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Hey all, I am in the second year of the IB and will be having my Ib exams in NOV 16. Since I will be taking my mocks in the coming month, I was planning on buying some IB books especially the: Physics for the IB Diploma Coursebook 6th Edition by K. A. Tsokos but since its quite expensive, I wanted to ask your opinion if its worthwhile buying and if it is really a good book that covers the entire new syllabus and gets me prepared? will be waiting for your feedback THX
Last reply by ChocolateDrop, -
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Hello guys! So Im an IGCSE student and I just finished my last exam (add Maths ugh hahah) and now we've been starting a bit with the IB syllabus. Basically, Im very worried for HL Maths next year but I would rly rly like to keep it. To make my life a bit easier for myself I've been thinking about studying A LOT of the physics syllabus over the summer so that it'll be more like revision when we go over it in class rather than something new (so that I can spend more time on Maths) Is it possible to learn the entire physics SL syllabus (cuz Im guessing HL as well is too much) over the summer? Cheers!
Last reply by kw0573, -
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Hello! I am an IGCSE Student and i'm taking Higher Physics in IB after the summer. Could someone tell me exactly how hard it is to get a good grade (perhaps a 6) in HL Physics? I'm predicted an A* for IGCSE Maths and I usually get an A in Physics in IGCSE (However, i've heard from all my teachers that IB Physics is miles away). Is Physics as counter-intuitive and difficult as everyone says it is? Frankly, this is the only subject im extremely worried about for next year. I'm taking SL Maths too rather than HL Maths as i'd just prefer to have a good grade lol I mostly would like to go into Economics/Finance and probably if I can, i'd like to minor in Computer S…
Last reply by thecsstudent, -
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Hi there! I've got a question about Physics IA. I want to work with Diffraction and I was thinking about what can I do. Do you think that "determination of hair length by diffraction" may be a good IA? I would use Fraunhofer theory on diffraction. Thank you!
Last reply by kw0573, -
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Hi, For my Physics IA I will be determining how the initial velocity affects the range of a catapult, however to do this I need to change the angle and I was wondering how do you measure the angle of release. Is it from the bar to the arm? from the arm to the ground? or something else, any help is appreciated. thanks,
Last reply by kw0573, -
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I am a little bit stuck on this question about the Doppler effect. It says A police car is traveling at 17m/s and has a siren emitting a sound at a constant 475hz. The speed of sound is 340m/s. Make a sketch of the frequency vs the time heard by an observer at the side. Label the f axis with actual values of min, max and middle frequencies. I understand the equations needed for the Doppler Effect but I don't understand how the frequency one involves time. Any help would be good:(
Last reply by kw0573, -
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hi all, i have a group 4 presentation coming up soon and we have been given a topic, which is BEVERAGES being distributed and consumed by the students in our school and posible future problems of side affects. i need help of what my question should be and what i should include. thanks, gaby.
Last reply by GabySchaaf, -
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Hey fellas! My physic's teacher just asked my SL group which option to take. He told us he has experience in Option B, D, and E. We discussed about it but no conclusions were made. The options are: (Taken from Physics IBO Guide) Option A — Sight and wave phenomena Option B — Quantum physics and nuclear physics Option C — Digital technology Option D — Relativity and particle physics Option E — Astrophysics Option F — Communications Option G — Electromagnetic waves Since I'm coursing the 1st year of DP, I'm not as experienced as some of you guys are... So, for you, which of those is harder? Which is eas…
Last reply by Rigel, -
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If I am writing my Extended Essay in Physics, about waves and diffraction, does it necessarily have to contain something very complex, or beyond syllabus to score high grades? Or is it possible to score high grade with only in scope of SL/HL syllabus? Thanks
Last reply by Rohan0192, -
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Hello everyone. Next week I will be starting to collect data for my Physics HL IA, however, my teacher said that my current question "How does the height from which a ball is dropped affect the time it takes for it to bounce 5 times?" is too simple. She said it'd be better if I found a way to make it a tiny bit more complex so that I'd have more stuff to write about. I have thought about it for a long time but could not come with any other ideas, does anyone have any suggestions on how to improve my research question? Thanks.
Last reply by tashakappler, -
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Hello, I have doubts about answer to uestion 13 (a) (ii). As the image is formed at the near point, for overall magnification shouldn't the formula linear magnification of an eypiecie * linear magnification of an objective be used? And if they want to use angular maginifcation for an eyepiecie, why do they sue the formula for image at infinity (D/f) rather than imagie at the near point (1 + D/f)? I keep getting 429, whereas the answer apparently is 380??
Last reply by Skania, -
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New specimen physics HLpaper2 Question 7a determine the maximum emf induced in the coil The markscheme says the answer is 3.2mV. I keep getting 0.3mV I found the gradient B/t and used the BAN formula. What did I do wrong?
Last reply by Skania, -
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Hello everyone. I'm in Physics SL and I'm taking my paper 3 on engineering physics Monday. However I'm having trouble understanding rotational equilibrium at an angle, and I was wondering if anyone could help me with this problem: question number 10 on this pdf document: http://www.menihek.ca/Teacher%20Pages/Paula%20Kelly_files/Physics_3204_10_11/Review_Sheet_torques.pdf A uniform rod of length 2 .0 m and mass 4.0 kg is hinged at the left end. A 25.0 kg sign is suspended from the right end. A guy wire is connected to the end of the rod and is fastened to the wall. 1. Determine the tension in the wire. 2. Determine th…
Last reply by kw0573, -
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Hi guys, Does anyone have the pearson book for physics HL? If so, do you mind sharing the answers for option C - Imaging? I only have the pdf version of chapters and it'd be great if I got the answers too!
Last reply by Sandy, -
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Hello I'm an ib student that is taking exam during the May 2016. I wanted to ask if I can change my option a few days before the exams. My friend told me that our teacher sent to the ib the option we were supposed to study but i dont feel confident with that one we studied about and i wanna change it a few days before the exam. Is it possible or do i have to write the exam on the one that my teacher "sent" to the ib? Thanks in advance.
Last reply by kw0573, -
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Hey, Are nuclear energy levels and atomic energy levels the same thing? Also shouldn't the atomic line emission spectra be evidence for this?
Last reply by ibstudent321, -
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Hi Guys, Any ideas for this one? Here is what I was able to figure out: since frequency is increased while intensity is constant, current flow must decrease. Hence, it's between A and C. That is because for both of those, the x-intercept is more to the left, meaning that it takes less voltage in order for the current flow to be 0 (makes sense because current flow is weaker when blue light is used). However, I'm stuck when it comes to differentiating between A and C. If anyone could tell me if my reasoning so far is correct, and what are the final steps, that would be greatly appreciated, Good luck tomorrow for everyone! P.S: the answer is C.
Last reply by Odelouche, -
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Hey, How do you calculate energy density if mass, power (input) and efficiency are given? Thanks
Last reply by Sandy, -
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For the question 1 part b, the markscheme says that you have to add 4700N but where is this number coming from? I understand that average force is different from net force, but where does this value come from?
Last reply by physicsfedme, -
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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, -
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Hey guys, I can't solve these correctly. Need explanations, thanks!
Last reply by Vioh, -
Physics Question
by Guest iblearner- 4 replies
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The correct answer is B. But why couldn't it be C or D? They all look similar to me lol
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Does anyone have/created a word document with the physics defintions we have to know? It would be very kind if someone could send it to me:D
Last reply by kw0573, -
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Hi, In how much detail do we need to know the pressure-volume graphs and isothermic, isobaric, isochloric and adiabatic processes? All the old past papers have a big question on it in paper 2, but the new specimen paper doesn't. Is this due to a syllabus change or do we still need to know it? If so, what exactly do we need to know about the topic? Thanks!
Last reply by Sandy, -
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Hi Guys, I'm having a hard time understanding this question: I failed it miserably in my mock, then went back, studied the concepts, tried again, and again couldn't come up with the right answers. I don't really understand what the mark scheme is doing, an explanation of the equations used as well as how the direction of current is determined and used would be much appreciated. The question and mark scheme are attached, thanks a lot for your replies!
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I don't get how to do this question. Can someone explain?
Last reply by kw0573, -
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So, I have chosen physics as my seventh subject and was told that since it does not count in my overall score and it will not be written on my IB diploma I can fail it. However, I am not so sure about this information. Can someone please tell me if there are certain rules regarding this topic? Do I have to pass this subject in general or all of my papers have to be in a range for the mark 2? Thank you so much!
Last reply by rosie123, -
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so i'm taking physics HL and I want to start proposing ideas to my teacher for my IA, but I don't even know how to start thinking of ideas. Any suggestions?
Last reply by ibsurvivorhopefully, -
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I was looking at some past papers and found questions on it but we hadn't done it in class so just checking.
Last reply by Tarun Khubchandani, -
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hey guys, I've got a doubt regarding dissisipation of power. How do we know when to use P = I^2 R P = V^2 / R P = VI Is there some rule I'm not aware of? For some reason, P = I^2 R is used for power lost, and P = VI is used for total power. Hope to hear form u guys soon!
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Why is the answer to this A? I know the induced current should create a magnetic field that opposes the one that created it but if the answer is A wouldn't it be in the same direction below the wire? Also in this one why is the answer D?Isn't the force from the left magnet to the right and the force from the right magnet to the right as well?
Last reply by thecsstudent, -
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Hello! this is my first post here. I was wondering if anyone has ideas for IA topics on basis of aviation. I would desgin an IA with lift but I don't know how to measure lift, unlike the independent variable: area (cm2). Thanks! D-ALPA
Last reply by Slovakov, -
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Hello, everyone! I am really struggling with trying to understand the explanation given to this particular problem in the image I've attached. I more or less got the first half of it (although I am not sure what is meant by a ray "escaping"), but what really puzzles me is how a critical angle and a refractive angle can be complementary. Or does anyone have any alternative explanations to offer, perhaps? Thank you so much in advance!
Last reply by kw0573, -
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Hi. What is the intensity pattern of double-slit interference? I googled it, there are two different types of graphs coming out. One has the same maximum intensity, the other one has different maximum intensity. I am really confused about this. Can anyone help me? Thanks.
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Why is the answer to this question B? Could someone please explain?
Last reply by thecsstudent, -
I want my EE to be on light waves, and how it creates different colors. But I don't really know how to go further with my topic nor do I know how to make it into a question/experiment. Can you guys help me with this?
Last reply by annidime, -
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Hi there!, Could someone tell me why, the answer to this question is B? I don't understand why the uncertainty of B is higher than A. Thanks!!
Last reply by elihid98, -
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Does Anybody Happen to have a list of Physics Equations that we need to know which are not provided in the Physics Equation Booklet. Xxx
Last reply by josephapakesch, -
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My teacher gave me a 10/24 on the Physics I.I.; I'd thought I'd do well on it, but I didn't. Based on that and two mock exams, I've been predicted a level 3. The way my teacher's talking about it, it seems the highest he thinks I can get is a level 4. I've been getting level 4s this entire year and now it's dropped to even lower. Is there any possibility of me getting a 6 or a 7 in the final exam, and if so, what would I have to do?
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In this video squirtle is falling in free fall up to second 12, when he starts using hydro-pump and propels itself up. If I want to calculate the kinematics for this, do I assume he is going up from a still position? Or in which ways can I found out what velocity that would be? Also, when at 0:15 he reaches a maximum point and remains in equilibrium for certain time, the only way for this to happen is if he stops accelerating and all forces balance out, but if he suddenly reduced the intensity of his hydro-pump at the maximum point, he would keep momentum and go up a little bit still, thus not reaching a maximum point in the first place. The only answer is that he does…
Last reply by Andrew, -
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Hi! My physics teacher has a PhD in wormholes and all that stuff, so he would really know how to guide my IA, the problem is that I need to have it ready by Tuesday, or Wednesday at most. Also, it would be almost exclusively descriptive, since my idea is to explain the theme of time traveling in the plot of The Legend of Zelda in terms of different time-space theories, and see if time-traveling instances occur according to a single theory, or if they are inconsistent. Does this count as analyzing a simulator or is this an unwieldy topic for the task?
Last reply by bsimps3, -
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In the guide for Physics HL, it says that one of the understandings in Quantum physics is 'Quantization of angular momentum in the Bohr model for hydrogen' But the quantization of angular momentum comes up in a really long and kind of confusing derivation for the formula rn=n2h2/4(pi)2ke2m. The formula isn't given in the data booklet, so do we need to know it and its derivation? Or do we just have to qualitatively understand Bohr's model?
Last reply by pdgcm, -
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Hi. I am doing some past exam questions to revise for the finals. I met a problem and I do not really know how to deal with it. Green light is emitted by two point sources. The light passes through a narrow slit and is received by an observer. The images of the two sources just fail to be resolved. Which change allows for the images to be resolved? a) Replacing the narrow slit with a circular aperture of the same size. b) Using violet light. By the formula for rectangular slit, theta=lambda/b, the smaller the wavelength is, the smaller angle is. It makes sense that using violet light is true. The formula for circular aperture is theta=1.22lam…
Last reply by Vioh, -
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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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Hey guys, I need some serious help... So I am doing my physics IA on the infinite ladder resistor and when I try to propagate uncertainty I get ridiculously big numbers (i.e. 150300%). How can I do it? This is the problem I am approaching--> (I am adding more and more loops to see if it reaches the golden ratio) In order to do this, the next resistance is in theory given by the expression attached. So I am propagating uncertainty by adding percentage uncertainties by that expression because I cannot work out the absolute uncertainty of Rn as it is composed of several loops (In order to get more loops you have to multiply, add, etc). However if I add the…
Last reply by elihid98, -
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Hey fellow IBers, I recently decided to do Physics as my extended essay as it is the subject I definitely find most enjoyable working on. I came up with the idea of basically investigating the relationship between the varying size of a hole in the side of a box containing water and the rate at which the water comes out. I'm not quite sure of exactly everything I'm going to investigate, I'm more primarily concerned if this topic will be enough to get me to 4000 words without having to BS anything. So, what do you guys think? Will this topic allow me 4000 words or will I have to edit it a bit or have to come up with something completely different?
Last reply by kw0573, -
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Since exams are approaching so soon I am really really worried about the Physics Paper 1. I usually get solid 7s in Papers 2 and 3 and for some reason I got a 5 in my mock paper 1 and have been doing pretty badly in most paper 1s. I have revised the theory many times but somehow I always get confused at MCQs. Does anyone know any effective exam/revision techniques for paper 1?
Last reply by Physics Tutor,
