Physics
For Physics Discussions
1,008 topics in this forum
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- 2 replies
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- What's the best way to study Physics? Thank you in-advance! Forgot to mention, I have a test at the end of this week.
Last reply by GissellaGamboa, -
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- 737 views
So for our design lab, I was thinking of doing something with resistance in electrostatics? It has to be in independent/dependent form, and I wasn't sure what I could do. Could I measure resistance across different metals? I have no idea, please help!!
Last reply by Vioh, -
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- 6.5k views
Hey guys, I thought you would appreciate some IB questions to help with your semester exams. Here are some IB questions and markschemes that cover most of the first part of the syllabus. Kespur T2 Kinematics ms.pdf T2 Kinematics.pdf T6 Circular motion ms.pdf T6 Circular motion.pdf T6 juipter question.pdf Thermal Physics MS.pdf Thermal Physics.pdf
Last reply by kespur, -
- 2 replies
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Hi! The thing is that our physics teacher just announced that we, the HL students, need to make our IA labs from scratch because the ones we did last year supposedly aren't about complicated enough topics, so they would result in low grades. Is this true? Do the IA's of HL students really need to be about more complicated topics in order to achieve good marks?
Last reply by Djsporting, -
- 1 reply
- 841 views
I'm taking the SL Physics exam this May (2015) could anyone please link me a copy of the Syllabus? Any help is much appreciated! My teacher is a fking btch who doesn't help us out for sht
Last reply by ShootingStar16, -
- 1 reply
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Hi! I'm using a computer program (Logger Pro) for raw data collection. I have a problem with uncertainties though. I don't have any quantitative error in my tables, I've written it to be Systematic error. Any suggestion on what I should do? Thanks in advance.
Last reply by ibprincess, -
- 3 replies
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Using the data below, estimate the mass of water turned into steam as a result of this heating process. initial mass of water = 0.30 kg initial temperature of the water θ = 20°C specific heat capacity of water = 4.2 × 103 J kg–1 K–1 specific latent heat of vaporization of water = 2.3 × 106 Jkg–1 The no.s are superscript in some of them.... And pls can anyone solve the mass of the water turned into steam?
Last reply by Vioh, -
- 4 replies
- 658 views
Hello everyone, I have been trying to study the gravitational potential energy concept from two sources. One of which described the change in gravitational potenial energy to be: m*(V2 - V1) = m*change in V while the other described it as m*(V1 - V2) = - m*change in V so which one is it? and can the change in gravitational potential energy be negative? Thanks in advance
Last reply by m.k.2015, -
- 1 reply
- 744 views
Hi everybody, could any of you please explain why the potential difference across the burned out light bulb is 15 V? I am only struggling with this part of the question. Thanks in advance
Last reply by HiggsHunter, -
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I'm really confused by this question. I thought the answer would be B, because the lift's motor allows the lift to move, hence electric to kinetic energy, but the markscheme says the answer is D. Can anyone explain why? Thanks in advance!
Last reply by Vioh, -
- 2 replies
- 705 views
Hello everyone, can someone please help me by explaining the attached question. The answer is there, but I don't know how they got it Thankkkks
Last reply by m.k.2015, -
- 1 reply
- 971 views
Hello! I am working currently working on my extended essay in physics. There's one thing I am a little bit unsure of, and that is the use of error bars in the x-axis. Okay, so by having them in the y-axis, you can make max-min slope lines, which is great. So I am thinking, and I could think of these solutions: 1. Just put them in, then you have error bars in both the x-axis and the y-axis, then graph the max/min slope lines from wherever that the slopes are at their maximum/minimum - The max/min slopes would then look like this: Very bad sketch. Anyways, the maximum slope would go from the minimum y-value, but maximum x-value of point 1 to maximum y-v…
Last reply by Intuition, -
- 8 replies
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Hello guys! I'm new here to IBS and honestly, I made this account mainly for making this thread but I'll make sure to stick by later. I'm going to start IB next year in January and I already chose my subjects. I have a question. Is it possible for me to take physics at HL level with basically no prior knowledge of physics? (I did it 2 years ago but heh I forgot everything) I really want to work in the astrophysics field, which obviously requires physics. But universities requirements are really harsh (whyyyy) and demand Physics or Maths as HL. My school recommends people who haven't done the subject over the last two years to take it as SL but I honestly thi…
Last reply by khimberleigh, -
- 1 reply
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I do not watch many movies, so I do not know many scenes that defy physics. Does anyone know any good movies that defy physics? And maybe how they defy. Thanks a bunch!!!
Last reply by Emmi, -
- 3 replies
- 1.5k views
Can someone with access to the May 2008 paper help?( It's available in xtremepapers) I can't seem to make sense of the answers to question B4 pt. 2 (Linear and circular motion) Can someone please explain it to me?
Last reply by ibprincess, -
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Hey guys, So i am currently trying to figure a problem out that our teacher came up with. A brass weight whose mass is 200 g (0.2kg) is heated in a hot water bath on a hot plate. After heating for three minutes, it is transferred to a calorimeter filled with 175 grams (0.175 kg) of water. The calorimeter is left to sit and is measured five minutes later to have a net temperature change of 7 K. What is the specific heat of brass assuming that the calorimetric constant is 195 J K^-1 and the specific heat capacity of water is 4200 J K^-1 kg^-1. It seems to me it is missing the initial temperature of the boiling water/brass to find the temperature change of the brass. …
Last reply by Vioh, -
- 5 replies
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Hello, I am new to these forums and so thank you for your help ahead of time! My IB Physics SL teacher is kinds of lazy. He gave us our first IA the other day and I am having trouble understand it. Here are some questions that I have: 1. My teacher said that IB Physics IA is completely different from a Bio IA, so how is it different as my Bio teacher did a better job teaching us how to do an IA. How is it different? 2. The sheet that he gave us (its about Topic 3: Thermal Physics) basically tells us that we will be graded on DCP and Conclusion/Eval and that i understand, but do I still have to do Design? 3. Lastly, the lab doesn't tell us what to test, it just …
Last reply by iggy_gim, -
- 5 replies
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Hi I'm on Pre-DP and I've got pretty good grades this far, at least on mathematics and experimental sciences. Humanist side is eternal struggle but, however now my problem is physics. I somehow managed to keep up until this point but now I fell ill for almost 2 weeks. I've managed to more or less catch up on other subjects but physics is hard. I am fine on mathematics and calculation side of the subject is easy to me but all those notations etc. for example I easily get mislead by units. I even spent 15 minutes trying to solve unknown "K" which actually meant Kelvin well, that was bad from even me and usually I'm not that stupid, but yeah, you get my problem. Also…
Last reply by Emilia1320, -
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Hi everyone. I am doing my EE in physics. I wanted to nvestigate the relationship between density and specific heat capacity, using 5 different metals. I know that the relationship is inverse, but i would appreciate if you could explain why, in your own words. I know the answer i need and explanation, please help me!
Last reply by williamkrishock, -
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Hi everyone. I am doing my EE on physics (Relationship between the density of a metal and it's specific heat capacity) Could you guys help me out with the theory part which connects both of them. I have theory on SHC and on Density, but I need the theory that shows their relationship. Please guys I could really use the help, thanks. Either theory explained by you or websites or documents are perfect, the more the better.
Last reply by williamkrishock, -
- 3 replies
- 749 views
I am reviewing for a test. I can't work out how B is the correct answer. I look at the possible answers now and I would most probably choose A. It gives us a velocity-time graph and we're supposed to find the corresponding acceleration-time graph. I don't quite see how B works in the sense that acceleration seems to be constant, yet how does that make sense if the function is not linear, doesn't the acceleration vary? It's in Spanish, but I don't think that should matter too much. Thanks in advance wait what. I'm sorry, I'm new to this. The picture is there twice whoops.
Last reply by MitchCampbell, -
- 7 replies
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Hi I have math, chemistry and physics as my HL. The problem is that I'm the only one doing physics in my IB school. So I did the HL physics options during my IB1 and the core during my IB2. The syllabus for the science has changed and there is new IB physics teacher. She's going through the core very slow and only teach the SL part now. I'm afraid I have to self study HL materials. The only thing is, I still can drop to SL PHYSICS and take HL English B. But then I will have to keep HL CHEMISTRY, which I really don't like. What should I do? Guys please help me. If you were me, what will you do?
Last reply by IBfreakingout!, -
I am very bad when it comes to estimating errors and error calculations. For a voltmeter and ammeter what is the normal errors? Could I have 0.5%? And if I had that value, how would I do my error calculation when I take the average of two readings? I appreciate your help!
Last reply by Awi, -
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Hi guys, if anyone could help me out to part iii if this problem, I would really appreciate it! Milk in a cup is heated to boiling point by passing steam through it. Whilst cooling subsequently, some milk evaporates. The cup contains.3 kg of milk at an initial temperature of 18 C. ii) Estimate the minimum mass of steam at 100 C that is required to heat the milk to 80 C (I did this and got .84 kg) iii) State two reasons, other than evaporation, why the answer to b ii is likely to be different from the actual mass of condensed steam.
Last reply by by.andrew, -
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Hi people, I am finishing off my physics IA, and I am on 1700 words and not finished. What's the word limit?
Last reply by khimberleigh, -
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I am doing a lab report on Hooke's law, and I'm trying to find the constant "k" of a spring. I am having an issue with the positive and negative signs. To do the experiment, we placed different weights on a spring and measured how much it stretched out. So now, the force we got was mass (the one we placed to stretch the spring out) times gravity, should the force be negative since the acceleration due to gravity is negative? I understand that the - sign in F=-kx is not because the constant is negative, but because x is negative? I am assuming that the constant is meant to be positive. Could you please clarify what is negative and what is positive? I am a bit lost. Tha…
Last reply by Vioh, -
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- 978 views
So my teacher sucks and has basically taught us no option. I chose to teach myself the option Digital Technology, I've already learned most (if not all) the concepts the only thing I sort of struggle on is the Amplifier circuit analysis, I don't seem to find any good resources, books etc. Any tips on analysing amplifiers or maybe some resources, books, notes, videos etc. would be really appreciated
Last reply by Vioh, -
- 2 replies
- 820 views
Hi everyone. I'm in Y11 and I'm being asked to make my IB choices for next year. The Highers I want to do are Maths, Physics and History. I haven't done my GCSEs yet (or even my mocks- my school is quite full-on about choices) but I took Maths IGCSE last year and got an A* (93%), and I'm doing FSMQ Add. Maths this year (predicted A), and am predicted A* for Physics IGCSE. So my question is, do you think I would be able to do Higher Maths and Physics with these qualifications? Which are the harder topics in the Physics HL course, and which are more theory/practical heavy? What kind of practicals do you do? I would be really grateful if you could tell me about this- I'm…
Last reply by sushichan*-*, -
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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*-*, -
- 3 replies
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First of all, I would like to say that this model is NOT a perpetual motion. It will stop eventually. What I want to say here is that the output useful work seems to be greater than input energy My system consists of 2 elements. Each element is a cylinder put on an axle. There are two permanent magnets stuck on each cylinder, with their north poles are faced outside. In the youtube clip that I will show you below, you can see the magnets of the first element are painted in blue, while those of the second one are crossed with X. I turn the cylinders slightly so that the north poles of the magnets are faced each other. Then, the thrust between magnets make the cylinders…
Last reply by Vioh, -
- 11 replies
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Hi there, So soon I'll be starting on my first Internal Assessment in physics. I need some suggestions for an experiment / investigation I'll be completing in regards to: Rubber Bands, or Elastic Bands, whatever you like to call them. If it's possible, suggest something that would be rather easy to out take, with a few variables, you could suggest it in a form of a investigation question. – Thank You!
Last reply by Sofia., -
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If my lab report is about the effect of the change of the area of the hole at the bottom of a can on the rate of water flow which is my dependent and which is my independent variables? And what would my Investigation question be?
Last reply by mr_awesome, -
- 0 replies
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Hi, can anyone suggest any interesting experiments with slinkies or springs that I could use for my physics SL lab report? Thanks
Last reply by Badalyan, -
Help With physics problem.
by Guest SNJERIN- 4 replies
- 692 views
A projectile was launched perpendicular to a 30deg slope at 20ms^-1. Find the distance between the launching position and landing position. I tried it many time and keep getting 20√3m, but doesn't match the answers at the back of the book.
Last reply by Vioh, -
- 5 replies
- 2k views
Would be really, really, really helpful! Thanks!
Last reply by Magician, -
Learning definitions?
by Guest Aniruddh- 6 replies
- 841 views
Hey Guys, I have just started my IB (about a month in) and in Physics we have completed Measurement as well as Motion in class. I thought it'd be a good time to start preparing my notes and I plan on completing them for my subjects over the weekend (Friday is a holiday as well). While I was browsing through the syllabus, I saw several terms like displacement, distance, speed, velocity etc... under the understandings section. Are we supposed to learn the formal definitions of those terms or just 'understand' them? Will we asked to state the meaning of those terms or simply apply our understandings in other questions? It doesn't explicitly mention that we are to learn the…
Last reply by Ossih, -
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I have been told that for the new Physics Syllabus (First Examinations in 2016) the Internal Assesment will be on one specific lab which will be conducted and written in class. Is this correct? Best Regards, Djsporting
Last reply by Djsporting, -
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I need a third higher level subject which is maths related. I'm going to do A level maths aswell as IB and I need a higher science subject which doesn't have a high workload. I know any higher level subject will require a lot of work and effort obviously but which is the easier of the two. I have narrowed it down to Computer Science and Physics. I like both and I know both are really difficult but I am not sure which will take up more time as I am doing an A level aswell and need time for that too.
Last reply by Cashyy, -
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- 787 views
Hello everyone i need help finding last years papers so i can study. I checked ib's fb page, it site and everywhere but i couldn't download them. Do you have any useful links? Thx a lot:)
Last reply by Gaby, -
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I have to submit a Lab report tomorrow and i dont have a clue
Last reply by Andy Sebastian, -
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- 607 views
I chose the topic for my Physics extended essay as : Oscillations of ball rolling inside a hemispherical curved surface I thought I would investigate the factors affecting the period of the oscillating ball (like radius of ball, radius of curvature of surface etc). I thought it was a good choice because the experimental set up could be easily made. And so I chose this topic, and my teacher approved. However, when I am doing my research now, I am seeing this topic is way too simple, It has a physics lab like difficulty - not ideal for extended essay. See this Link. Is there any way in which this topic can be made appropriate for my extended essay, either by modifyin…
Last reply by joel96, -
- 1 reply
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Preferences Preferences Hello, I am stuck on my design lab. It has to have something to do with physics and be testing a factor that affects the rate of evaporation. I don't want to do surface area as i feel like it has been done to death, and i cannot do the viscosity of liquids as that is more chemistry. I want to do something with temperature but i don't know how to control the different temperatures i want to test. I have to perform this experiment at home so i don't have access to a lot of materials, i want the set up to be extremely straight forward as i have like 6 more labs Thanks Preferences § 1 2 3 4 5 6 7 8 9 0 - = Backspace Tab…
Last reply by theboro76, -
- 2 replies
- 885 views
What's the jist physicists! hey guys, so I had a question about the different types of radioactive particles/radiation.. which one is the worst type of radiation: alpha, beta or gamma? I realize that gamma is the worst in the sense that it's most penetrable. But apparently they have the lowest ionizing ability? so.. hypothetically, if they had the same level of penetrability would alpha particles be considered most harmful to health? thanks a bunch guys.
Last reply by flinquinnster, -
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Hello! I'm writing my extended essay in Physics on holograms and holographic projection. I'm stuck on how to write my research question, and I was wondering does anyone have any ideas? Any ideas on what specific regions I should focus on? What I have so far is: What is the physics behind holographic projections and how can they be applied to the modern world? I need expermental data, so how could I incorporate that into my EE? Thanks.
Last reply by ..., -
- 2 replies
- 824 views
I start Year 1 HL Physics in August thus following the new syllabus. What books should I get or videos I should watch, and should I do something over summer? I am stuck on whether to get the oxford one or the KA. Toskos one that comes out August 31st. Also, any advice to do well in that class overall because I heard it is the hardest course of the year.
Last reply by entrails, -
- 9 replies
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Does the IB program have any plans to institute a calculus based physics class, rather than the algebra based ones they retain at the moment? I'm not trying to sound snobby, but there are some people that would argue the IB program's physics cirriculum is too superficial to count for university credits. It essentially hands you a bunch of oversimplified formulas without deriving them, and glosses over a few very elementary concepts before throwing you exams that basically involve plugging and chugging what to you are just arbitrary algebra equations. Now, of course, I'm using "superficial", "oversimplified" and "elementary" in a relative context - relative to AP and u…
Last reply by Andy Sebastian, -
- 3 replies
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Hey, i m doing my EE in physics. So my topic is how does the shape of the parachute affect the terminal velocity reached by the falling object. My independent variable is the shape of the parachute. Dependent is time taken by the parachute to reach its terminal velocity and my controlled variables are wind, height, mass of the object and the material of the parachute. So here is my doubt that how can i find the point at which the terminal velocity of the parachute is reached?
Last reply by Andy Sebastian, -
- 2 replies
- 882 views
Hi everyone. I've been busy making some new videos in time for the May 2014 exams. Sorry I haven't posted much lately, but I've been so busy with my revision courses (in Denmark as always, but this year we added Dubai and Qatar!) Ok, so I have just posted a new playlist on youtube for Topic 3: Thermal Physics. You can see it here: https://www.youtube.com/playlist?list=PL6LH0ngwf3Huf8Iy8m-0ogpbfYQ4Dhk9x It has everything you need for topic 3, and the last two videos touch on the AHL Topic (Thermodynamics). So if you're in SL only, ignore the last two videos in the list about Ideal Gas Law. The reason I put it in there is because the new syllabus that starts next year has i…
Last reply by John Hoose, -
- 2 replies
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Hi guys, I am currently taking Physics SL for one of my courses. I was wondering what the difference between the SL and the HL book is (the Pearson Baccalaureate books)? I wanted to get one of the books, but I'm wondering if getting the HL one would help me in university. I know that for chemistry, the topics in the HL level are after the SL level topics, so it would help to get the HL version if someone were to take SL and want the book for university. Is there a difference between the physics books? I mean, does the SL material stay in the front of the book, or is it kind of mixed in the HL material? I'm sorry if I don't make myself clear enough. I've never been t…
Last reply by John Hoose, -
- 0 replies
- 519 views
Here is the link http://ib-physics-sl.weebly.com/
Last reply by Bahdah Shin,
