Class Definition and 942 Threads

I understand the principle of moments and how it is applicable to first class levers: A stone, at 1 m from the fulcrum weights 300N I stand at 3 m from the fulcrum: Clockwise Moment = Anticlockwise Moment F x 3 = 300 x 1 Therefore, I have to exert 100N of force to lift the stone. To...

Hi! I wasn't really sure where to put this thread, but my grade right now in my first undergraduate physics course is around a 93%, and apparently the average in the class is an 87.6%. I feel like that's an unusually high average. How do you think the professors will handle this? Do you think...

Hey friends I need some simplified notes for class 11 ncert physics Thanks

I want to make sure of this question: If a compact oriented n manifold is smoothly embedded in another oriented manifold and is homologous to zero as a cycle in this higher dimensional manifold then the Euler class of its normal bundle is zero. why do i think this? since M is null...

I have been reading various online tutorials on the subject. Does anyone have some good links they will share. I am trying to build my understanding of the class A amp so I understand what I am doing if I chose to build a Nelson Pass Amplifier. I have an understanding of transistors and...

Has anyone studying electrical eng. had the class " Linear Circuits "? what is this about, and why is it not called for example, something other than linear? in math , there is a lot of things that are not linear , so why do they call the class linear circuits?

Hi, everyone: I am trying to understand why the mapping class group of the torus T^2 (i.e., the group of orientation-preserving self- diffeomorphisms, up to isotopy) is (iso. to) Gl(2,Z) ( I just realized this is the name of the group of orientation-preserving...

I have been given this question (in the attachment). I have a deifnition for what it means for a function to be in the schwartz class, but I don't know how to start showing that the hermite function belongs to it? I have attempted to write out the first couple of terms using the n+1 forumla...

I am a mechanical engineering student at the Oregon Institute of Technology and am looking to interview a mechanical engineer for a writing class. I am interested in learning what types of communication you use such as proposals and recommendation reports. If anyone would be willing to help with...

Hello All, I am studying for my introductory astronomy exam and I came about these two question; Galileo discovered a) radioactivity b) some moons of saturn c) 2 moon of Mars d) some moons of Jupiter e) the telescope I know he discovered 4 moons of Jupiter but "some" is a bit...

Homework Statement Introduction You are part of a team working on a software system for a mobile phone company. You have been asked to write a class capable of storing the details of a transmitter. The class will need fields to store the x,y coordinates of the transmitter and the...

Ive just started learning about integration and antiderivatives in class, and I've got a question Say we have: f(x) = 1/x^3 , and f'(x) = F(x) g(x) = 1/X , and g'(x) = G(x) then to find the antiderivative of f(x), i would solve it like this: first rewrite it as : x^(-3), = x^(-3 + 1) / (...

Hello, I'm a 2nd year undergraduate working towards a degree in mechanical engineering. Overall, I'm doing fairly well with a 3.87 GPA, but this semester I am taking one class (circuits analysis class), and it has been kicking my butt. Right now I'll probably get a C in the class. It seems no...

Homework Statement I'm trying to prove that "if R is an equivalence relation on a set A, prove that if s and t are elements of A then either [s] intersect [t] = empty set, or, [s]=[t]" Homework Equations The Attempt at a Solution I know that if you were to start trying to solve...

I'm trying to program a java simulation of some particles in a box. Anyways I want to initialize the particles with random velocities such that on average they're distributed around some velocity. To do this I was thinking about using the nextGaussian() method. Anyways I was initializing...

I want to take either a geology or physical geography class; I don't know which one I would enjoy more. If I take geology, it fulfills a prerequisite for another class I would like to take, Speleology; but the likelihood of me taking this class is unlikely. I have a general idea of the...

I am (hopefully!) going to be entering grad school in the fall. I will be going for a PhD in applied mathematics. Many grad schools recommend that you take a course in probability before entering (it is strongly hinted that doing so will improve your odds of admission). Here's where the...

Hello PhysicsForums! I had been reading up on a congruence classes when I came across an example that miffed me. A lot of information was given but I can't seem to make sense of it: Here it is: Assume \lambda = (3+\sqrt{-3})/2 \in \mathbb{Q}[\sqrt{3}]. We know that \lambda is prime and...

Homework Statement "A beam of electrons in a television tube moves horizontally with a velocity of 1.00 x 10^7 m/s. How far will the electrons drop as they travel a horizontal distance of 20.0cm?" Vx (final velocity) = 1.00 x 10^7 Vox (initial velocity) = 1.00 x 10^7 Ag = 9.8 Xy...

Due to schedule conflicts, I was not able to take AP Physics B this year (my senior year). I am taking honors physics, but as you would guess, it is no where near the caliber of AP Physics. I bought the Princeton Review for AP Physics B, as suggested by the teacher. Besides working through...

Homework Statement Let f be a non-zero continuous function. Prove or disprove that there exists a unique, real number, x, such that the integral from 0 to x of f(s) w.r.t. s = pi. Homework Equations If any exist, please let me know. The Attempt at a Solution...

Hello Everybody I am a Physics Major transferring to Michigan State University next semester. I have completed Calculus based Physics 1 and 2, as well as Calculus 1,2,3, Linear Algebra, and Differential Equations. I am wondering which kind of math class some of you may recommend to take next...

Hello. I have this JAVA code, I have to change only class "LS", so that program gets sum and displays it. But I don't know how to get command line arguments to LS class (I need them in "??", to get sum). Can anyone help? :) public class S { public static void main(String[] args)...

I am currently a sophomore physics student taking a pretty rough course load and am struggling quite more than was expected. I took computer programming as a class "for fun" but it is totally blowing me away. I think I currently have a C in the class and it does not appear to be getting...

So here's the slight problem I'm running into. I have this Physics class that's not really going as planned. I understand the information, I'm just (slightly) bombing the tests. I get all of the questions involving numbers, but the "supposed something visually and tell me what the ball does"...

Homework Statement I have: - 1 class to read a data series (see text file attached) (series.h and series.cpp) - 1 class for a function (function.h and function.cpp) I'm trying to create another class which has input from 2 above class (as constant references) and produce output which has...

I started doing organic chemistry lab a few weeks ago and the instructor is an evil bastard when it comes to marking lab reports. We've 2 reports to do per week and I spend at least 6 hours on each report but only manage to get 60%. I can't be wasting all this time on a single class. Are there...

Hi all, I'm a graduate student and while I was reading about measure theory I stuck at this question , can anyone help? Let the function f: R->R be continuous except on a countable set. Show that f belongs to Baire class 1 of functions. For the solution I see 2 ways : 1. We need to...

I'm a freshman ChemE major. I have 15 credits lined up for next semester but want to add one more class since one is a PE, one is a non-intensive honors class, and one is economics. Should I take Java or an intro to Linear Algebra class? I have no experience with Java, and the intro class...

So I'm studying molecules and symmetry and I was wondering if there was a intuitive way of understanding why there are as many irreducible representations as there are classes. I keep getting lost in the math of the characters.

Here is my problem. Consider the matrices A = \left(\begin{array}{ccc}0&i&2\\0&1&0\\1&0&0\end{array}\right) and B = \left(\begin{array}{ccc}2&i&0\\3&1&5\\0&-i&-2\end{array}\right) Calculate A-1B andBA-1. Are they equal? Hint: find the inverse of A in the diagonal basis. I am really not...

This my basic understanding of it. I would appreciate if someone can correct me if I am wrong. When a tank circuit at the output of a class C is tuned to the input signal, it energizes the tank signal on every cycle of the tank voltage. When you set it to a 2nd harmonic for example it...

I missed a day of school due to sickness and while I was out the class went over isomers in our organic chemistry unit. I copied the notes down but quite frankly I am confused as hell about how to find them. Can someone please explain them to me.

Homework Statement ac | bc if and only if a | b (Note that this is really two implications.) 2. The attempt at a solution The only way I can see going about this proof is by using examples. I know that in ac | bc the c will cancel out in both, but I don't know how to properly word...

I've been up for hours trying to figure out the proper notation to prove problem #4 (1.6.5) on the attached files. I'm not sure how to set this up. It is basically proving the product rule using the gradient of two functions. The rest of the problem is on the backside file, but help getting...

At the moment, I'm studying Physics. Let's say that in my first year I have scored 89%. How many students on average would get that score? Does that result mean that I am on track for receiving offers of admission at MIT, Princeton...for graduate studies, given I keep getting such results in...

Hello, I am a sophomore and I need to conduct an interview on an engineer in the field i wish to enter into one day, so i was looking for a mechanical engineer, so if someone could get back to me as soon as possible that would be great, thanks for your time, Kevin.Reid414

At my university, it's a junior-level class, and mine is being taught by the physics associate chair. It's very fast-paced, and he told us the first day of class he would give us the hardest homework problems in the book. Well, he does. Aside from this site and finding solutions online to help...

I am a freshman in college and I am in multivariable calculus, I took the first AP calc in high school. I am deciding to walk in on an Ordinary Differential Equations class. It is apparently graduate and I didn't understand a single thing in there. I didn't understand anything mainly because I...

I'm considering taking an RF circuit design class that would focus heavily on transmission lines and microwave circuits. It's supposed to be a tough class but I think I would enjoy it because I really like E&M. The problem is that if I take this class I won't be able to take a photonics class...

I start Quantum Mechanics on tuesday, and I was just wondering how hard or easy is the classes Thank you

I am wondering if the following mod 2 cohomology class which can be defined on any compact surface, has any geometric meaning or is important in any way. triangulate the surface then take the first barycentric subdivision. This is a new triangulation. Define a 1 - cochain on this new...

my sis in class 12th & she needs 2 submit a bio project which carries 5 marks .since i m not a bio student i can't tell her anything.. please suggest a good bio project in bio.

Hi all, I am new to topology & geometry. I skimmed through the subject in various books so I might be asking simple questions. My question is how can we say Chern's class belong to Integer rather than Real cohomology class? I assume one defines it through the characteristic polynomial of...

Not quite sure how central angles ended up in a PreCalc class, but oh well. Okay so, I'm given this picture And this information: A satellite is in orbit 2000 kilometers above the Earth. It is scheduled to pass directly over a tracking station at noon. The satellite takes 2 hours to make...

I am currently producing an exam paper. My friend suggests me using the exam document class. It's quite convenient most the time and I almost finish my work. But there are 2 things that I am not satisfied with: (1)the default spacing between questions, parts, subquestions How can I adjust the...

Hello All, I have an undergrad physics degree. I've been studying GR on my own for a while, including Hartle, Schutz, Carroll, etc. There is NO GR course offered this fall in the state of CO, which is where I live. This fall I'd like to take a real ONLINE class in beginning GR included...

how can i access the private variables of a class from another class? for example... class One{ public: One(); private: int array[6][7] }; class Two{ public: Two(); private: void printNumbers(); }; void Two::printNumbers(){ // i want to...

I am just going into my fourth year of a 4 year MSci course and have got my results from my third year. It's not as good as I had hoped and my average is a 2.1. I know that Cosmology is very difficult to get into and PhD's are over subscribed. I was also hoping to work at one of the...

Im a rising junior in the US starting my upper division physics classes. I have an opening this quarter and want to take an applied math course, but cannot decide between these two: In the mathematics department: "Applied complex anlysis Introduction to complex functions and their applications...