Class Definition and 909 Threads

Hey guys. So this problem asks me write a function that accepts a string, and outputs an array of class logical where the true values are the vowels and everything is false. As of now, I have: And when I run this function for say the string 'AAA' I get 111(The problem with this is that it's...

I realize this probably fits better in Academic Guidance but I figure I'll get better results here. I'm trying to set up my schedule and I'm wondering what, in your personal opinion, were the hardest classes you've had to take. To me hardest doesn't just mean conceptual problems but also the...

Yo, This past fall I took a linear algebra class. Linear algebra is not required for my major, but it looked interesting. For some reason, in this class we seemed to discuss more so the idea of vector spaces and not so much types of matrices. There is a higher level linear algebra class which...

Hi, Everyone: I am reading a paper that refers to a "natural surjection" between M_g and the group of symplectic 2gx2g-matrices. All I know is this map is related to some action of M_g on H₁(S_g,Z). I think this action is...

abcd

So, I'm majoring in Physics and I got an email from my adviser saying that "Intro to Unix" was one of the most helpful classes. They only offer them during 2 times. One is Tuesdays 5:15pm to 6:30pm while the other is online. I've dabbled in Linux distros and use them from time to time, so I'm...

I recently read that in the way we class particles if we measure the properties of two different particles and class them as particle A and particle B and continue to measure the properties of a third particle which we find to be only slightly removed from those of particle A that instead of...

I am about to start Uni' in a few months and I have been thinking of getting a kindle for books and hopefully for textbooks. However I got the understanding an Ipad does better with pdfs a research papers. I am planning to start my undergrad studies in math. is it feasible to use an ipad...

I am currently trying to figure out my Sophomore year first Semester schedule for college and I am stuck on taking Calc 1 during the summer, or teaching myself it to just take Calc 2 at my school or in the summer if I do teach myself it. I major in Adolescent Mathematics Education and these are...

I am having a lot of difficulty on my continuity problems for my Analysis class. 1. Prove that (f O g)(x) = f(g(x)) is continuous at any point p in R in three ways a.) Using the episolon delta definition of continuity, b.) using the sequence definition of continuity, and c.) using the open...

Homework Statement Im working on a lab experiment in my undergraduate physics degree requiring the use of a class 4 laser, i need to characterize this in terms of its power, coherence, pulse duration, wavelength and irradiance. This is a pulsed laser with rough parameters of 1-2J pulse energy...

So for my first semester of college ( I am a Physics Major. ) I have most of my classes picked out. The last one I need is either Introduction to Physics which isn't required for my major nor is it a pre-requisite for anything I need, but I feel it would be useful for preparing for my Physics...

Dear All, I have got a subclass (Panda), which inherits a Print function from the base class (Bear). I'd like to be able to call the base class's function from the subclass. But my complier gives me the following error message: In member function `virtual void Panda::print(char)'...

I am a commuter, transfer, older, and somewhat shy to boot. However, even my professors recommend working together on the problem sets they give out because they scale the difficulty towards working in groups. So how I do start talking to some people? They all seem to know each other and...

im taking circuit theory 2, which is all about ac circuits, but don't have enough money for a book need a place to learn about how to calculate lead and lag based on the inductance and capacitance, nortons and thevinans and all that stuff but in the context of sinusoidal currents and voltages

I'm having difficulties with two UML class diagrams. That's the first one: http://img821.imageshack.us/i/umlv.png/ I can't really read the words next to bird, but it looks like "Tran" and "Saad" ( some kind of bird?) I don't really know how to explain this? You're supposed to describe...

Homework Statement Let P be a true sentence, and let Q be formed by putting some number of negation symbols in front of P. Show that if you put an even number of negation symbols, then Q is true, but that if you put an odd number, then Q is false. Homework Equations So ... the problem...

For a math elective. Our exams are online. I did very poorly on the first exam because I wrote almost all of my answers that warranted it in scientific notation purely out of habit, which were all graded as incorrect. I of course emailed the professors protesting, they will meet and talk...

I have to teach Tires to my class and I want to do something innovative and new that will tie into Physics. Please help and any ideas you have that I could use would be greatly appreciated

Do you think there was a problem with the way you were taught a certain subject? how would you have wanted it?I would have wanted my physics instructor to focus on the concepts more than the exercises and to try to make less careless mistakes in solving them. Also is there something that your...

Just a quick yes/no poll. But share any other thoughts you would like.

I am looking at building a pair of third class levers out of materials found at the local hardware store to lift up some 500lb and 1500lb hulls. I have systematically gone through every option available to move these hull pieces out of the mold and I'm left with two: 1) Modify an "off the...

My degree is for engineering. This semester I will be taking a CAD class, but before I take this class I wanted to know if it would be a waste of my time to take?

If last semester I bought the webassign for my calculus class and we didn't use it, can I use the same webassign for my physics class next semester? I am assuming I am probably going to have to buy another webassign, but I just want to make sure. Thanks.

What topics are typically covered in a 300 level modern physics class?

Hi, everyone: Given a smooth, orientable manifold X, we turn Aut(X) the collection of all self-diffeos. of X into a topological space, by using the compact-open topology. Aut(X) is also a group under composition. The mapping class group M(X) of X is defined as the quotient: M(X):=...

Homework Statement 3rd class lever 5m distance from load to effort and 1m distance from effort to pivot. Load = 1962 Effort required to lift load = 11772N MA = 0.16 or 1/6 ( so there really is no MA) Calculate the velocity ratio of the system ? Homework Equations I have...

Hey everyone, I'm a physics major in junior year that missed out on my classical mechanics class this fall semester because of some prereq stuff. I emailed the professor teaching QM next semester and got in without the necessary classical prereq. He said I should go over "the Hamiltonian and...

I'm a freshman currently, and I just blatantly overestimated the difficulty of this class, and I didn't really treat it seriously. The teacher put intentionally tricky questions on the exams and I ended up failing them, and I'm feeling pretty bad about the whole situation. I intend to go into...

It just happened to me. And it's immensely frustrating. Not to mention the difficulty of convincing professors that I understand the material well (certainly well enough to get more than a 3.5 in it) despite getting below a 3.0 on the course. Yes, I made mistakes. My first few weeks were...

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...