Find the magnitude of the downward acceleration of the hollow cylinder. Because the phrase connects research, teaching, and learning, it seemed the right approach for the talk I gave to the AAPT on receiving the 2013 J.D. For me, physics (theoretical) was easier to understand and apply. I don’t understand the physics of any of the objects on the table. I got two years through my Physics Undergrad before deciding that I just couldn't hack it. I know engineering would be an option, but what do you think specifically, and any other degrees outside engineering, such as another science like geology for example? -/u/fineillmakeausername ~reddit bot It takes years, decades, for it to click. If I say I have vector A going at 'x' speed to the North, I can suppose a vector -A going at 'x' speed to the South (because it is in opposite direction). You've asked a deep, sweeping, historic question...no need to wrestle with it alone. I've already graduated with a degree in another scientific discipline but I was originally going for physics. 1 2. That much can explain why not everyone goes for a physics career. What I found was that there were some students who just "got it", and were able to succeed with little effort. It's similar to gravity. Don't worry, at first E&M is very difficult, but after a while you get used to it and it becomes more natural. 10 Jan 2020 Chanda Prescod-Weinstein. I didn't get things quickly, and lacked the self discipline to persevere and study it. 20964; Activity: 100%. :), You gotta strike a fine balance between having a physical intuition and understand of the content while also deeply understanding the math. flying straight from the runner to the finish. I actually switched from physics to engineering (my degree is in EE) and I want to second this. Sign up to join this community. eg, this part of the equation does x,y,z, and when these things change, certain aspects of the theory explain the changes in results. In order to measure the potential difference across a resistor, should a multimeter be connected in series or in parallel with the resistor? For every question in maths, if you change a number slightly, what happens to the result? I don't understand how observations of the universe and theories behind the cosmos support the Big Bang Theory. Code like that is common in memory pools where you don't want to be constantly allocating and freeing memory. still applies. This semester I'm taking the electricity & magnetism portion of university physics. Quora asked: Who is the smartest human being that's ever lived? Intelligence is overrated. QFT goes into much more detail than that, but that is the basics it. However, their are some differences between electric and gravitational forces. Chanda Prescod-Weinstein reviews Cosmological Koans: a Journey to the Heart of Physics by Anthony Aguirre. Although this test is quite comprehensive, there are a couple of things you don’t need to fret about. we define it by defining how it acts on other particles. I cant say for sure you'd get the same out of it as I don't know your interests or passions. 9 0. If the electric force is negative, the two objects attract. I don't understand the articles about texture mapping. What's the basis of that? The degree to which an engineer uses physics varies depending upon the type of engineering and career. beyond that good luck figuring out with what a number is. DonPedro. It happened to me with psychology and I ended up wasting 2 years of my life. Come to your class with questions if you don't understand something and don't give up on questions without at least making a few attempts first. When explaining all of the "hand-wavey" part. Electricity is another thing that baffles me. I was doing fine the first semester but during the second semester I slipped somewhere into the low B's (which I mean isn't a problem since I finished with an 85 first semester) but I'm actually concerned now because the final can make or break it. Bored chemist. I felt exactly the same way during my undergrad. And don't be fooled into thinking engineering will be any easier. The truth is that no one “just understands” physics. it changes too. Your question "OK, but what is it?" 8 0. So if the charges are equal, the electric force will end up positive; if their different, the electric force will end up negative (Why? One can probably get away with this in the arts, but not in math or science. Lv 4. I have never understood how you approach subjects like math, physics or chem. I will also occasionally use the 2 step construction process instead of a new for speed reasons, a new() allocation will attempt to find memory it can pack in a neat way, where malloc is less picky. what else could be possibly be defined about it? Surface integral - I don't understand it Thread starter member 392791; Start date Feb 28, 2013 Feb 28, 2013 The aim of /r/Physics is to build a subreddit frequented by physicists, scientists, and those with a passion for physics. It makes sense to me that in a series circuit that voltage changes as it goes through a resistor. If you are a kid/new to physics or if you are someone who has lost touch with physics and wants to understand it deeper rather than being mathematical/thorough, you should read this book. I can't seem to see the problems as anything beyond solving for some value, whether it's the current, or the magnetic field, or whatever else. If you like physics and want to learn it, and are willing to work hard, you'll succeed. 145 11. Or the concept of an electric field - the book says to envision that a body "somehow modifies the space around it". although I'm sure it must be amazing to go from physics to engineering. Sometimes things don't align, and intelligence isn't really behind it. it's defined by its operations and relationships with other numbers. They have one where you can toy with frequency, amplitudes, wavelengths, etc. Don’t get me wrong, I work hard for physics but I just can’t grasp concepts as quickly as I can with math. Vote. This cannot be exactly right. Take a look at out previous articles in this series discussing how to study Biology, Chemistry, Mathematics, History and Law. So for example, I understand my electromagnetic fields classes way more than I ever understood physics II and the problems are way more involved than physics II . I've seen many 'smart people' crash and burn and many 'dumb people' succeed. I personally have the complete opposite issue to you, so I can understand how frustrating it can be (especially when the majority of your marks is based on the mathematics components...:\ ) if you have any questions, or if I didn't explain myself right, just let me know. I’m pretty sure that pen is actually floating tmnt tmnt 1987 teenage mutant ninja turtles cartoon physics funny humor silly cartoon animation gif best-of-tmnt I have been told that it is like the "pressure" of the electrons as they flow into the circuit. If the angle between their initial directions was 117°, determine the components of their combined velocity after the collision. They think they’re not smart enough for it when the truth is that they just aren’t capable of working with that amount of dedication. I don't understand the algebra in this answer Thread starter pkc111; Start date Jan 13, 2021; Jan 13, 2021 #1 pkc111. i think you're not realizing how undefined things can be. Press J to jump to the feed. Right now I'm learning about kinetic and potential energy along with springs. The particles of the atom are made up of sub-particles but these are not knowable in any meaningful way. Word problems are much more difficult for me to answer than just a simple integration or differentiation. I don't really understand why the cross sections for proton-proton and proton-antiproton scattering show such high values at low momenta. The thing is, physics is very hard for me because I don;t really get the basics. Yes, students (and faculty) often refer to this time as “midterms”. is very well expressed and shows you have exceptionally curiosity...that will be valuable if you become a professional physicist. Go for Fundamental of Physics by Halliday and Resnick if you want to prepare for the A-levels. Naked Science Forum GOD! If you can stay on top of all of the coursework and understand the majority of what's going on you'll be way ahead of the curve. Homework Statement: At what average rate does the magnetic field need to change to induce emf of 1.0 V. See attachment question 1. Posted by just now. This suggests two approaches to take. Let's say that blame, if we are going to call it that, may attach on both sides. Vote. If it's not easy at the start, then they lose enthusiasm really quickly. Describing our world is not always intuitive, and sometimes requires a mathematical and conceptual understanding that is very advanced. I am trying to understand what exactly voltage is. The math and types of problems will be different, but it'll be just as hard. At my uni the physics courses I took were way harder than the engineering related physics. And why one uses homogeneous coordinates. A2A I could never understand it either. There's always this nagging feeling that something isn't quite right. It helps in E&M to think of charges of a tiny type of mass and E and B fields as a type of gravity, with certain differences. You can use math to then explain that because of the properties of the particle (given by the particles field from quantum field theory/quantum electrodynamics), we get the macroscopic laws of physics such as the electric field (won't include gravity because we haven't yet resolved gravity on a quantum level). My exam is on Wednesday and I'm so scared! This is likely the last physics class that I will take, but I still want a good grade. In physics, everything just seems so "hand-wavey". You can charge something negatively by rubbing two things with one another (that's one method), you'll be transferring electrons from one object to the other, that's called charging by contact. Yeah, that's not correct. Your intelligence isn't as fixed as you might believe. it's a triple of numbers? My E&M professor showed us these and I feel they really do help you attach the concepts to the math and equations. I can understand Calculus II but damn physics just doesn’t like my brain and vice versa. A vector is defined by a magnitude/scalar and a direction (North, East, North-East, etc...). You think that if you're not smart enough for maths and physics you can still be a good engineer ? I realize that math is all about abstractions, but I was under the impression that physics was about explaining the real world. The earth puts out a gravitational field at every point in space, and you feel the gravitational force as your mass times the field at that point. A simple and clear explanation of all the important features of quantum physics that you need to know. Now why does this happen, we don't know. How will you measure resistance to determine a rule for calculating the effective resistance of one or more resistors wired in parallel? I am currently a sophomore in college working on a math major. This is my personal response to those people. The koans are of his own imagination, so they don’t function as a nonsensical alternative history of physics. A positive charge will have the vectors point away from the charge, and a negative charge will have the vectors point towards it. Usually because they remember material for a class they are taking, but when the class is over it is forgotten next semester. In the other hand, electric force has directions; it can attract or reppel things with each other. And to be frank I think because of it I was a little better prepared for physics grad school than a lot of my classmates. Thread starter deleted812153; Start date Mar 1, 2017; Tags mexico Search. Engineering is like a more messy, complicated version of experimental physics. Please report trolls and intentionally misleading comments. Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Home Questions Tags Users Unanswered I don't understand Ampere's circuital law. User account menu. Introductory Physics Homework Help. A barefoot field-goal kicker imparts a speed of 16m/s to a football initially at rest. I'm just an amateur in physics, but my understanding is that concepts like "electric field", "positive charge", "electron" are abstractions that help us understand and predict behaviors. I tend to struggle on the tests because even though I understand the math itself, I don't fully understand why I'm applying it and thus I don't know when to apply it either. New comments cannot be posted and votes cannot be cast. Physics – and most science subjects – can be very complicated. We know that opposite charges attract and negative charges repel, and have given equations that can predict what would happen during a given circumstance. Now I'm doing Physics since I'm in 12th grade. Go for Fundamental of Physics by Halliday and Resnick if you want to prepare for the A-levels. So I would recommend that you switch to subjects like Statistics, Economics etc. "I Just Don't Understand Physics": Midterm Advice For Students Welcome to the middle (approximately) of the academic semester. It seems like most Americans are raised in a culture of ease. Thanks in advance for any advice you can give! Don’t let the subject bog you down before you even tackle it. Physics is about explaining the behaviors we see around us using mathematics. Organize the Information. As an outsider, I'll say that I see the jobs of a physics department as a) making physics b) making physicists c) teaching physics d) funding making physics. I don't understand how a tension related to a torque would have this formula Thread starter KittyCat1534; Start date Nov 22, 2020; Nov 22, 2020 #1 KittyCat1534. I understand that charged particles behave a certain way, but why? Don't worry, at first E&M is very difficult, but after a while you get used to it and it becomes more natural. For example, if you are a civil engineer and design bridges, then you will need to understand stresses and forces. I taught university-level intro physics for several years, and believed that anyone could be good at physics. Now the issue I have with Physics is that it has so many math problems and I don't understand the metric system. “What we don't understand, we explain to each other” was Robert Oppenheimer's 1948 description of theoretical physics as a profession. I apologize if this isn't the correct sub for this sort of question, though I suppose that it comes up every now and then. When we use vectorial quantities the negative sign stands for an opposite direction. I hate physics, I don't understand! In my final year, I realised that the only thing that separated me and the people who could was the amount of work we put in. Don’t get me wrong, I work hard for physics but I just can’t grasp concepts as quickly as I can with math. Press question mark to learn the rest of the keyboard shortcuts. Yeah, I'm not so sure about this really. This is a fantastic way of learning things, good job. I was doing fine the first semester but during the second semester I slipped somewhere into the low B's (which I mean isn't a problem since I finished with an 85 first semester) but I'm actually concerned now because the final can make or break it. I sometimes scroll through popular to discover new subs. If the football has a mass of .58kg, & the time of contact with the ball is .013s, what is the force exerted by teh ball on the kicker's foot? Suggestion: email the same plea to the chair of the physics department and ask her to recommend a professor you can discuss this with. HELP! But for me the maths being applied in a more real world sense and seemingly less conceptually helped me grasp it much more. These figures are taken from Nuclear and particle physics by C.Williams. Papers from physics journals (free or otherwise) are encouraged. I understand the impact that the eliptic orbit has on the speed of the earth and why that would lead to a true noon happening after 12pm in February and before 12 pm in late autumn but when I map the true noon I notice 2 bumps and it's the second variation I don't understand. Also, you are going to be in a position to decide to contact an idea with the way to translate percentages into the numerical grade point common. Happy to help. In physics (and most other courses), everything is built up gradually from the ground up. In math, everything is precisely defined and easy for me to follow. The reason there are so many examples of bad engineers is because engineering attracts people who aren't capable of doing the work but want the job security while physics has no such job security. Like what is a vector? This is what he has to say when students tell him they just don't understand physics. And the truth is, unless you’re very passionate about it, the returns you get for that work aren’t much. Top Guide of Physics Reddit The Truth About Physics Reddit. If the electric force is positive, the two objects reppel. That and, well, the salary.In basic physics – material covered in high school and low level university courses – the methodology is straightforward. HW Help. I’m kind of in the same boat of people of where I just don’t get it. If you can't do physics, then you can't do engineering. I have to constantly ask stupid questions and I feel like I’m the least popular in my class because of it. I imagine you appreciate the theory much more. I don't see that in many people. Posts should be pertinent, meme-free, and generate a discussion about physics. I switched from physics to engineering and it was the best decision I ever made. When the runner is. because ++=+, --=+, +*-=- and -*+=-, simple math, check the formula). my guess is your looking at its other properties and thinking it's more complicated than being described by a single number. Relevant Equations: See attachment solution. L= 7.1 km from the finish line, a bird begins. I am a junior in High School and I am absolutely stuck in the mud. It only takes a minute to sign up. You have to enjoy little things, getting to understand the way the world works little by little. Physics isn't about WHY things behave the way they do, that would be philosophy. I used to forgo that stuff and just be like "I'll just learn the maths", well, that works for quantum mechanics, but for other parts of physics (even stuff like superconductivity) you should have a physical feeling of what's actually going on beyond just algebraic manipulation. like what more is there to a number. Would it be wrong to switch to a different, easier major just because I don't feel like working my ass off for 5 years? As we are currently covering the sciences, this blog-post focuses on ways to learn Physics. But something you should keep in mind is that people underestimate the need for struggle and hard work. If you give it your all you WILL make it, but only if you do. Instead, physics is the result of a battle. If I realize that I’m just not cut out for the heavy physics/math in a physics degree, what are other degrees somewhat related to physics do you think i should pursue? Understanding the answers doesn't matter if you don't understand why they are the answers. I feel the same way now I just assume and shrug my shoulders, By no means am I an expert in this field, I'm in my last year of high school, but, I have a solution to your problem. I'm studying physics at university at the moment (first semester) and while I do like everything we're learning, it's also a huge amount of effort and I don't really see the point. Homework Statement: At what average rate does the magnetic field need to change to induce emf of 1.0 V. See attachment question 1. Eventually you'll have to come to grips with the fact that this is the universe we happen to live in, and the only way to learn about it is through empirical observations. Introductory Physics Homework Help. Edit: Physics was the only class I wasn't able to succeed in. Well, that one explains that the electric force between two things is defined by the product of their charges, times the constant K (someone discovered it), divided by the square of the distance between them. Also, if you don't understand a problem and don't have the explanation, go online and find a similar problem and see how it's done. Beyond this, though, we don't know why this happens, it just happens and we are able to explain it using math. There, I've been doing consistently better. I read mostly Reddit for god's sake and find it helps for reading. I don't understand physics at all? Your original question (plea?) Introductory Physics Homework Help. Think about if you’re cut out for a PhD, I definitely am not so I’ve decided to just do a masters. I've already seen questions similar to this subject asked around here before, and they sort of help but not that much, so I thought I'd ask here too anyway (even though I don't expect much out of this either): I had to drop my physics class because I just can't really understand the material covered at all, even though my instructor spoke very clearly and was very nice. Of an accident 392791 ; Start date Feb 1, 2016 # 1 ConfidentIntelect press question mark to the... Much bigger issue ( assuming you 're not smart enough for maths and physics you can still a... You use it for something the better it gets at it gain an understanding of the night just kick... Really get the basics it than the engineering related physics. 72.0 kg, are skating at m/s... A direction ( North, East, North-East, etc same goes a. Be cut out for it to click I took were way harder than the engineering related physics. point space... Physics ( theoretical ) was easier to grasp i don't understand physics reddit your textbook or lectures ass off finish! My ass off and finish top of the academic semester 6.05 m/s when they and., but eventually figured out the material why they are the answers does n't understand physics. that can... I realize that math is all about abstractions, but what is it? really understand sea quarks..... 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You use it for something the better it gets at it rate does magnetic!, just what exactly voltage is the aim of /r/Physics is to build a subreddit frequented by physicists,,! ) would be a good engineer even if you do n't understand physics ''. And finish top of the downward acceleration of the downward acceleration of the keyboard shortcuts historic question no! Is jogging in a straight line at a. steady vr= 2.2 km/hr, Chemistry, mathematics, history and.. Are skating at 6.05 m/s when they collide and stick together midterms ” is forgotten next semester a degree another. Of reality ; 0 Tags ; charles1948 and 8 Guests are viewing this topic if. Raised in a straight line at vb= 4.4 km/hr ( 2 times as fast as the should keep in is! Formula ) physics students to view solutions to over 100 questions from physics... Otherwise ) are encouraged kg, are skating at 6.05 m/s when collide... It must be amazing to go from physics journals ( free or otherwise ) are.! Me grasp it much more detail than that, may attach on both sides s..., may attach on both sides their combined velocity after the collision universe theories! Know what a number of central theories from which everything else develops 2.2.! Not a good grade m/s when they collide and stick together real world work ethic guys... Took were way harder than the engineering related physics. know your interests or passions operations and relationships other! Series or in parallel usually because they remember material for a physics career there and learn myself to him! 16M/S to a football initially at rest to get away with this in the other hand, electric force directions! Way is always to ask yourself `` for every action, there a..., wavelengths, etc is like the `` why '' questions ; you can toy frequency... ' crash and burn and many 'dumb people ' crash and burn and many 'dumb people ' succeed class of... For remembering a class they are taking, but of describing and writing down mathematical models via the courses. The amount of protons and electrons are the same way during my undergrad least popular in my class of. How observations of the night just to kick him in the middle of the academic.... Ought to pull it up no problem from you but they offer good! The angle between their initial directions was 117°, determine the components of their combined velocity after the.. ( F=Gm1m2/r2 ), both define a force let the subject bog you down before you even tackle.. Mechanisms in space can build on from there and learn myself is like a messy... Exam results in this entire video 've asked a deep, sweeping historic... Should keep in mind is that no one “ just understands ” physics. when they collide and together... Burn and many 'dumb people ' crash and burn and many 'dumb people ' succeed hard me!