Hard Definition and 1000 Threads

I used to like math when I was in high school. Calculus (integration and derivatives) seem intuitive to me and made me understand math so much better. Now I'm currently in university majoring in civil engineering taking Calc III and I feel overwhelmed by everything taught in class. No matter...

Homework Statement Homework Equations Kirchhoff;s first and second law, V=IR The Attempt at a Solution Tried the question as follows: V= 24/(2+6+4) = 24/12 = 2V (pd from top cell) then did 2=4 I3 therefore I3 = 0.5A and then 2 = 6I2 I2 = 0.33A and I1 = 0.5+0.33... =0.83A?

In this article, http://phys.org/news/2016-11-physicists-mathematics.html the authors did a study of 2000 physics essays and found that those containing more math were cited less often. We have this problem in philosophy. Essays which are heavy in logic are cited less often. But in...

Homework Statement [/B] Homework Equations The Attempt at a Solution [/B]

I know it has been asked before but hi, I'm currently a grade 12 high school student and am pretty scared about university. Financially, i can only go to uoft and so no other school is being considered right now other than ryerson or york. Now, is uoft really as hard as they say it is? (now i...

Hi everyone, My details: Age: 26 Education: Bachelor's in Mass Media; Post-graduate Diploma in Journalism Work ex: 5 years for an international news agency covering pharmaceuticals and healthcare. I loved science in high school and was great at it, but couldn't continue due to some unavoidable...

Is Discrete Mathematics hard? Is it pure or applied math?

I'm not sure what to do, I keep on struggling with the MATLAB assigments and I'm a physics major. Any ideas on how to cope with this? Didn't really expect to be doing this much programming, and I do not like it.

While in class, my Thermodynamics professor came up with an interesting fact, that neither I nor my colleagues were ever aware of: While you may have heard that friction influenciates the movement in Newtonian Mechanics, no one really knows what friction is. And so I have been wandering why it...

Dear all, I am self-studying GR using A First Course in General Relativity by Bernard F Schutz. I am halfway through the course, trying to solve all the exercises. But I worry that I can solve maybe 80% of them, the remaining 20% I find them just too hard. I know I am no genius, and I don't have...

What is the largest planet (in terms of size) with a hard surface that you can walk on and has a surface gravity close to that of Earth that we have ever discovered? What about the smallest?

Homework Statement http://imgur.com/a/QY1Fs Homework Equations F=dp/dt P=F/A The Attempt at a Solution I do not have the answer to this problem. Its not for homework so i won't be getting it either. I don't think my solution is correct though Let us consider a particle with speed V(x)...

Homework Statement Here it is http://imgur.com/a/Wltb0 Homework Equations F=dP/dt Cosine rule The Attempt at a Solution For the first part of the question I'm not exactly sure what the resultant of these vectors represent. First i thought they represented the relative speed of water to the...

Homework Statement Note: I'm saying it's very very hard because I still couldn't solve it and I've posted it in stackexchange and no answer till now. I'm posting here the problem statement, all variables and known data in addition to my solving attempts. Because I'm posting an image of my...

Homework Statement Everything is in the picture. Question 3(a) This is for preparation for a contest. http://i.imgur.com/FtiKaYw.jpg Homework Equations V=IR The Attempt at a Solution I calculated the total resistance of the first circuit and used that to evaluate V(AB). But this is in...

HiIn a few months I will be celebrating my 23rd birthday. I have planned to go to college this year but it seems that I will have to postpone that till next year. By the time I will be enrolled in an electrical engineering B.S program here in Germany, I will be roughly 24 years old. The degree...

Hi professionals, I have a medical background, and I would like to pursue an undergraduate degree in mathematics & physics, and I found two distance learning programs from OU (http://www.openuniversity.edu/courses/qualifications/q77) and UNISA...

This Stephen Hawking book gathers the most important books along human history. In theory, this book is just divulgative, but, Gäuss, Riemann, Gödel... books included in Hawking's are not meant to be divulgative. So, any of you who read the book(/books if separeted) think it's maybe too hard...

Hello PF, I am from Lebanon and i have been accepted to AUB (our most important university here) in physics. Now i haven't applied to any other university but we have our government university (Lebanese University) and there i can apply directly to physics with instant acceptance. Now here is...

I got into a top 10 Ph.D program yah I know yay for me and I'll be starting this fall. As I always I'm planning my course work way in advance and figuring out how to tackle it. For my required electrodynamics class they use Jackson. I heard a lot of bad things about that book. When I took upper...

I have to take chem I and chem II this summer because I switched to geoscience. I'm worried because everyone tells me its too hard to pass, and it kinda scares me, although I know not to rely on other people's fears to conclude how hard a class is. I finished all my finals this semester, got C...

I am a Mathematics major and I just ended my first year of college. I really like math, but I am deeply fascinated by astronomy and astrophysics. I took AP physics one in High School and got a B in it. I have heard physics majors are ridiculously hard, I am only pretty good at physics. I may...

Suggestions, please. The subject may be broad, so don't be afraid to put something out for us to consider. (I'm asking because I haven't really been in the genre in the past few decades.)

I've heard the same advice from this forum year after year: if you study physics have a backup plan because you most likely will not become a tenured physics professor. With the growing number of physics degrees being given and the dwindling faculty slots, this makes a lot of sense. In fact...

Only possible job for me is to become a physicist because it's the only subject I enjoy every second of it. Can I know what the competition of a job will be and the process Ill need to complete to become one,

I am probably missing something, but it seems to me that the only way gravitational waves could be generated would be if the center of gravity of a massive body or system began oscillating somehow. The detection of such waves was recently reported and were supposedly generated by a pair of black...

Find ${5^{2009}}^{1492}\mod{503}.$ How do you calculate a beast like this?

Say I wanted to attach a dynamo up to some pedals or something - what factors would affect how hard the shaft would be to turn? Is it governed by the physical configuration of the dynamo (windings, etc)? Or is it the (electrical) load attached that matters - and how does that work? If I wanted...

Well, until now. In calculus, you're just deriving and integrating functions, evaluating expressions, simplifying functions, and executing them, etc. I don't think it takes that much brain power to do the same mundane operations when everything (minus the variable you wish to solve for) is...

Homework Statement I have here a problem asking me to find the tension force on the lower end of a rod with mass of 0.6 kg. The rod connects two blocks, the first / upper one has a mass of 5.0 kg while other/lower one has a mass of 4.0 kg. There is an upward force of 150 N applied on the whole...

Hi everybody, I have this function to study ##\frac{(x+1)}{arctan(x+1)}## I need the limit to infinity,it's oblique and I have to find q,from y=mx+q. so q=lim(x->inf) ##\frac{(x+1)}{arctan(x+1)} -2x/\pi## I don't know how to solve it.the limit gives infinity to me.but calculators online give...

Please help, I am not sure if you can read my latex code. A friend of mine sent this to me before her final exam, I have been trying to solve it for 3-4 days. I used some substitutions, I tried integration by parts but couldn't get a solution. I used wolfram alpha but it needs more time and for...

Homework Statement I won't be following this format exactly, but I'm trying to come up with an idea for a physics exploration I need to do and I think I'm finally getting close to something. I'm trying to figure out what actual experiments I can do with this topic, and if they're of a high...

Please correct me if I am wrong. To my understanding , given a '##m##' multivariate set of equations in '##n##' variables in a integer field '##F##' is hard to solve, even in case of ##MQ(multiquadratic)## usually with field having characteristic as '##2##'. Where in case of ##DEHP(Diophatine...

Hi guys, I feel like a failure and I am miserable. I got two/five grades back. For physics lab, I got a C- and for thermodynamics I got a C. I worked really hard this semester, but I have failed. I put everything aside for studies, yet I am in misery. My aim is to get into graduate school, the...

Homework Statement Why can we assume that atoms in a solid material act like hard balls? The Attempt at a Solution because they are tightly packed together when in a solid state[/B]

So I'm planning to become a lecturer in civil engineering while obtaining my MS degree in Structural Engineering. Is there anyone here already took or taking the same path I'm planning to? How hard it is to do both? Thanks.

Hello everyone, I am currently studying traveling waves and reflection but I didn't understand a part of my last lesson. If we consider a string with a loose end and the other end attached to a wall we expect the string to have zero displacement at the wall and to have a reflected wave...

So far I got: Griffiths => easy, ok it's not so easy,not really what I ment, but it covers the basics without going much into the real deeper algebraïc stuff, emphasis on calculus, that's what I mean with easy, I mean a decent, solid book for undergraduate level. But suppose I tackle Griffiths...

Homework Statement A thin rod, 0.79 m long, is pivoted such that it hangs vertically from one end. You want to hit the free end of the rod just hard enough to get the rod to swing all the way up and over the pivot. How fast do you have to make the end go? Homework Equations P(change in...

I am manufacturing a plastic cube out of six flat, hard pieces plastic, of the same consistency as water bottle plastic. The top and bottom sides of the cube will be connected to the middle 4 panels by condom rubber. I need some kind of bendable plastic that can expand so that the cube can grow...

It's rather strange, isn't it? I did just fine in Algebra I, and even better in Algebra II, but now that I'm in Calculus I I'm finding that my algebra skills aren't as sharp as I thought they were. Often times i'll get the calculus portions of problems correct, but when it comes down to...

http://www.washingtonpost.com/blogs/monkey-cage/wp/2015/09/23/why-are-working-class-kids-less-likely-to-get-elite-jobs-they-study-too-hard-at-college/

I am a passionate sci-fi fan because of the specific ideas and themes the genre allows authors and readers to experience. It is unique among the literary scene for focusing specifically on a discipline(s) present in every aspect of our lives; that from which we can't escape: SCIENCE. Sci-Fi is...

Homework Statement For reference, this is the image setting up the problem. "A wireless sensor grid consists of 21×11=231 sensor nodes that are located at points (i,j) in the plane such that i∈{0,1,⋯,20} and j∈{0,1,2,⋯,10} as shown in Figure 2.1. The sensor node located at point (0,0) needs...

I am transfer student and this going to be my first year in university. My major is electrical engineering and one of my requirements is to take an upper level physics course. I chose mathematical methods however the title of the class is intro to mathematical physics and i am worried that...

Taking an intro ODE class. Class just started and we are using a book, that to me, feels like en encrypted alien language. It is hard to read, but to much words and images, not enough layout. I'm more into theorem/proof style books. The book is too chatty. Well anyways. It is giving problems...

HELP - math game A positive whole number was written on the board. In each step we rub out the number n (written on the board) and we write a new one. If number n is even, then we write number \frac{n}{2} on the board. If number n is odd, then we choose one of the numbers: 3n-1 or 3n+1 and we...

If there a finite field where both group structures have hard discrete logs? Discrete log in the additive group means multiplicative inverse.

How hard is it to get through university studying physics? Do you lose your social life and spend crazy amounts of time on it or is it managable? Also is it a big problem if you are missing the basics and can you ever catch up during Undergrad?