Class Definition and 942 Threads

I'm a physics major and I have the option next semester to take thermodynamics in either the chemistry department or the engineering one. The chem thermo class is taken also by chem and chembio majors and the engineering one is taken by civil, naval, environmental, electrical, and computer...

i'm currently a physics and applied math double major, looking at mechanical/aerospace engineering after graduation (i'm in my 4th yr but will stay for 5th) i'm taking my 1st engineering class ever this semester, which is Feedback and controls since i heard it would be a good class for me to...

Just started a Linear Algebra type math class this semester, and for some reason it has a 2 hour discussion class once a week. So far we have only meet 4 times so far, and i hated going to them since the 2nd meeting The TA goes over the same examples that the professor gives during lecture, and...

http://img16.imageshack.us/img16/7028/tempqk8.png This is the second time I'm posting this; last time I was told that it was not explicit. The image consists of 3 masses, m1, m2 and m3, out of which m1 and m3 lies at rest while m2 is in motion in the direction of the arrow. When m2...

I read the textbook 5 times now and I can't seem to figure out what the equivalence class suppose to be and how to find it, and i don't understand quotient set either (more importantly how to find it). I'm not familiar with any Equivalences at all if anyone can help me with it that would be...

I'm not trying to ruffle anyone's feathers here, but I keep hearing that Engineering majors don't actually learn where anything comes from (plug and chug) as opposed to a Physics major which learns derivations and history. I'm still torn between EE or Physics and a Freshman, so my knowledge...

We have a seesaw arrangement, a mass m3 supports the fulcrum, we have mass m2 on one end, and a mass m1 fall on the other end with velocity v. Considering the distance between the fulcrum and m1 is d and that of m2 is r, what will be the momentum distribution?

The need of having done a class "formally" I'm (something like) a master student in Europe, now being in my first year and I have the following problem: Last semester I was attending lectures on QFT, but I haven't done the exam/assignments, since it was way too much for me that semester and...

For my transition into advanced mathematics class, the teacher's-assistant we got for my lab section keeps giving us the answers to the harder proofs that we get as assignments each week. He is clearly not supposed to, in fact today he said something along the lines of "I hope nobody here is...

Homework Statement Got some work from my dad, but one question kinda stumped me. A short sighted person can view an object clearly only when it is between 11 cm and 19 cm from her eyes. Calculate: 1. The Focal Length of the specatacles required to give her a near point of 25 cm...

Hi Guys, Can anybody advise me where to get chart for tolerance class of 11e28 and 10e28 for the plastic Gears?

I have signed up for a bunch of science classes this semester. One of which is university physics. It is math heavy and geared toward the math/engineering/science major folks. The problem: I haven't taken any math class in over 10 years, and I have no trig or calc experience. Will this...

I'm currently a freshman at UIUC and a physics major. I've asked for a lot of advice on these forums and elsewhere and I think I may want to consider a double degree in some sort of engineering and physics. I have all my general education requirements done (thanks to a lot of AP credits) so all...

I am a physics major at a school with a limited program and no astronomy of astrophysics options. However, my goal is to go to Grad school for a cosmology/astrophysics. I would bet I know most of what is covered in the one astronomy related course my school offers, which is basically a survey...

I have two documents: a letter and an article and I want them to be in the same .pdf doc, only, they're two different document classes. Is there a way to combine them under one document, or something like that?

Homework Statement The Bloch-Gruneissen approximation for the resistance on a monovalent metal is \rho=C(T^{5}/\Theta^{6})\int^{\Theta/T}_{0}\frac{x^{5}dx}{(e^{x}-1)(1-e^{-x})} (a)For T->\infty, show that \rho=(C/4)(T/\Theta^{2}) (b)For T->0, show that...

What class would you take if you wanted to take something just for pure fun? SCUBA diving, Mandarin Chinese, archery, etc? I'll be looking for something like this to fill my time soon.

Is it even possible? I have a Princeton AP Physics book that is supposed to prepare you for the test, but is that enough? It's almost impossible for me to take this class, but I feel I could do well on the test. Would Barron's or Princeton cover everything I need to know for the test?

Hey, I'm going to college next year and I am majoring in chemistry. Just wondering, what chemistry class was the most difficult to understand?

Homework Statement If a group has order 20 has 4 conjugacy classes, it must have a trivial centre. True or False? Homework Equations The Class Equation The Attempt at a Solution I believed the answer to be false with this following counterexample: 20 = lZ(G)l + (20/4 + 20/4 + 20/5 +...

Hello, I've lurked anonymously for quite a bit on these forums, and until now had no reason to register and ask a question. Background: high school senior with (otherwise) high GPA(3.9) and fairly good ACT score (31) seeking advice and consulting from experienced PF member. Now that...

arXiv:0811.4129 (cross-list from gr-qc) [ps, pdf, other] Title: Consistent Loop Quantum Cosmology Authors: Martin Bojowald Comments: 13 pages Subjects: General Relativity and Quantum Cosmology (gr-qc); Astrophysics (astro-ph); High Energy Physics - Theory (hep-th) A consistent...

I have never come across this term before in my few years of chemistry. At first, i thought it meant molecular shape, such as "trigonal planar" or linear. But apparently, that is not the case. Apparently, it is in some form of AX2E (2 being a subscript), but that's all i can find on the matter...

I am currently enrolled in a linear algebra class that started at the beginning of September, and it will end in about 4 weeks. We are using Shifrin and Adam's Linear Algebra: A Geometric Approach. The professor is great: he's a great teacher who really knows his stuff. However, it feels as...

So next semester I am studying one section of the Philosophy of Physics at Oxford. This is paid for through my college; thus I can only take 9-12 hours (I am going the third term which doesn't start until late April). I am already a little behind because I had trouble deciding and have three...

My class sucks :( I finally got all my midterms back. I am really pissed off by two of my professors. One simply used assignment questions for the exam (I told him to be creative), and second one raised the class average from 60 (which is pretty normal) to like mid-high 70, and lots of...

Did the rocket lab in my physics class Shoot a air compressed rocket off of a base that can be angled (though we did not get to angle the rocket) shot it upward and what not. It had 3 different caps (lo, med, hi) and we did each one three times and recorded the data. The problem is I was...

I'm not doing too well this semmester. I should pass all my physics and math courses, but I might just fail a computer science class. I was sick for a week, missed some days, and then haven't been able to catch up. It hit me hard on a test. So, my question is, if I end up with an F or a D in...

Hi! I want to know if I do correctly this excercise!? http://img232.imageshack.us/img232/4857/calculo1ui2.png I am in stress because of this class! Me está volviendo loca!

A 500 g ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle, the tension in the string is 15 N. What is the speed of the ball at that point in m/s?

Hello! I am an second year undergrad at a liberal arts college majoring in physics. I want to go on to grad school in physics (although I have no idea what field right now, but I'm leaning toward theoretical). My school's only math requirement for the physics major is a class called...

Hey Guys, My teacher left us to do the proofs for the tricks that tell us a number is divisible by 3, 7 and 11. For 3 and 11, they were pretty straight forward since I knew the trick before hand. (a number is divisible by 3 if the sums of the digits are divisible by 3. or divisible by 11...

I am an engineering undergrad, and always get top grades in my courses, but find myself quickly forgetting the material soon after moving on to new courses. For example, on our first Calc III exam, I forgot how to integrate a very basic function for the integration of a vector function...

It's so annoying and boring, I'm doing algebra and triginometry for college students. I feel like I did all this already in high school but it was a coupla years ago and I've forgotten it and this teacher is just so boring, but I try to adjust the best I can. That's why I just needed some...

I am really struggling with what to do with this class. It is a general "science" class, meant to be the third science credit for students who are not very science-minded; as such, it does not count toward the admissions standards of the state universities around here--it is a...

Preparing for class and tests??... What do you guys you guys usually do to prepare yourself before a lecture? Whether it be a physics, organic chem, poly sci course, what is the one thing you usually always do before lecture?? Also, how about tests? Read prior notes, outlines, etc..?? Just...

What are the harder topics in an calc based intro to probability class? I'm taking it in 3 weeks so I have time to prep. Here's the course layout:http://www.math.ucla.edu/ugrad/courses/math170ab/170Aoutline.shtml

Homework Statement A hydrogen atom has a diamter of approximately 1.06x10^-10m, as defined by the diameter of the spherical electron cloud around the nucleus. The hydrogen nucleus has a diameter of approximately 2.4x10^-15m. Homework Equations (a) for a scale model, represent the...

I am an incoming sophomore that is majoring in math and having a potential interest in studying physics along side. Right now, I'm trying to take one more class alongside of physics (first year), abstract algebra, and history (for grad requirement). So far, I found these three courses to be...

I will be a junior in physics this fall. I am done with all undergraduate level classical mechanics, E&M and quantum mechanics courses. I think I want to do experimental physics. I have been working under an AMO physics professor whose research is about ultracold atoms and quantum optics. I have...

I'm sure that for many of you this class is old news; but I just started elementary number theory this summer and, as much as I love the challenge of the course, and doing these proofs; I feel like an amateur boxing Mike Tyson here. These things are chewing me up and spitting me out. Granted I...

An exercise I am trying to complete is to create a base class pointType which has functions to get two coordinates, store and print them; then to create another class derived from pointType that will find the radius, centre, area of a circle, and print these; then to create another class...

Anyone receiving degrees/already got theirs this spring? If so, congratulations! I just had my convocation today :) I was debating whether or not I should go, but in the end I did. It was long and hot but the best part was that they played the Indiana Jones theme when we were leaving the...

That ticks me off. :mad: It was supposed to start next Monday. I have the option to take a 5-week Linear Algebra course at another school, but I don't want to cram this course at all.

What does it mean the number after the stellar class? Magnitude?

I need to do a class project for a Physics of Planetary Science course. I'd like to do it on problems with/possible improvements on computational/mathematical methods in some aspect of orbital mechanics. Please let me know if you know of any specific contemporary computational/mathematical...

Hi, I need to build a telescope for my physics class. I need to use any 3 lenses(converging or diverging) and 1 mirror. I was thinking of using an achromatic telescope design for that. However I am not sure what kind of lenses to use and whether I should make the eyepiece from two lenses or just...

Miserable Math Class, Finally Over! I took PDEs this semester. This class was a 400 level, (upper level math class undergard), but my teacher was a real jerk. We did wayyy more chapters than any other class. He talked down to the class when he lectured, constantly. He gave a homework every week...

How do you show that the surreal numbers form a proper class?

My physics teacher gave us kind of a cool end of the year project: To construct a boat made entirely out of newspaper, masking tape, and shellack (I think this is the proper spelling). The boat will then have to go from end to end in a pool and the first person who does so wins. My idea is...