Class Definition and 909 Threads

I need to build a rube goldberg machine for physics class and i am stuck on ideas. It must include circular motion, projectile motion, rolling motion, gravitational energy, kinetic energy, elastic enrgy, conservation of momentum, and electric or magnetic fields. It cannot be powered by more than...

What is the difference between E class and F class power amplifiers and what are their potential applications? Thanks

Hi, noob question here, In C++, how can I return boolean comparison between two object pointers? ie. return True if the pointers point to same object. I've tried == but it doesn't work. Do I need to define a comparison method from within the class? If so what is the syntax for doing it? Thanks.

In a semester or two i am going to take an analysis class that uses "principles of mathematical analysis" as its book and i am terrified since it seems like a really difficult book. i haven't had much experience with proofs outside of linear algebra and geometry, so in other words i don't have...

My school is offering a advanced mathematical methods classes next semester, taught by a supposedly world-renowned professor. Everyone to whom I've spoken, students and faculty alike, says he's an amazing teacher who gives you a unique education. However, here is the course description: My...

Homework Statement Create a Java class named ArrayTest with a method called arrayCombiner that creates three arrays of size 10. The first array should contain the values 1, 3, 5, 7, 9, 11, 13, 15, 17, and 19. The second array should contain the values 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20...

As a high school freshman, I need to decide what classes to take next year. I was required to take Biology this year, but since now...time to decide my future. :) The issue I'm having is I love physics. I've studied everything I can on my own (online stuff, mostly, my parents didn't really want...

On my senior project, I've figured out everything I need to measure all the parameters I needed EXCEPT force. I know that I need to use strain gauges, and I've used them in my instruments class with Labview and a DAQ. While I'm still using Labview, I'm now using an Arduino so things are a little...

Homework Statement a 100kg bicycle and rider initially move at 16 m/s up a 15 degree hill. The rider slams on the brakes and skids to rest. The coefficient of friction is (0.8, 0.7) Homework Equations I have a few but nothing to do with a coefficient of friction. The last ones given to...

Homework Statement Im working currently with vectors. The question asks for the distance between two planes given by the two following equations: x + y -2z = 0 3x + 3y -6z = 1 Homework Equations I know the planes, H1, and H2 are parallel, so I can pick any random point on either...

I am really struggling with my Calculus 1 class. I have a book and everything for it I do all the problems from the book including the homework that the teacher provides us. I find the homeworks very hard and I have no clue how to solve some of them. The thing is when I took a placement test I...

Hi, I am a sophomore and I recently dropped Graduate Complex Analysis. I was just missing something. The solutions to the questions on the problem set were not capable of being formed by me. This being said, I am wondering if it is still possible for me to attend graduate school for...

i have two relations given to me which are both defined on the integers Z by relation 1: x~y if 3x^2 -y^2 is divisibale by 2 and relation 2: x~y if 3x^2 -y^2 ≥0 I have used three properties to figure out that relation 1 is eqivalence relation as it stands for all three properties i.e...

Hi, we are doing an egg drop contest in my Physics class and I was hoping to get some ideas for the best capsule possible. Here are the rules: - No pre constructed containers (cans, boxes, bottles, glass, uncut plastic bags, egg containers etc) -capsule dimensions must not exceed 6 inches in...

So let's keep it hypothetical here. Let's say a freshmen is taking intro level E@M and Junior level Griffths E@M at the same time. The student is doing this because in high school he took calc based E@M and believes he can relearn any gaps. The student is getting As in his intro level class but...

I know is very stupid to say this now, but I have no other places to turn to. My parents won't be happy about this, and me either, but from the bottom of my heart I believe this might be better off for me. I have been wasting my time on stuff that I shouldn't be messing with when I was...

Currently my class it calculating volumes of solids by rotating them about some axis, say for instance the function f(x) = x^2 bounded by s = { (x,y) | 0≤x≤1 , 0≤y≤1} and rotating it about the y - axis. I understand the general look of the graph on paper but I can't visualize the actual solid...

Dear Forum: I am a senior chemistry major that has the typical science/engineering background in math - 2 quarters of single variable calculus, 2 quarters of multivariable calculus and vector analysis, 1 quarter of linear algebra and 1 quarter of differential equations. I am currently...

Hello. I am currently taking Physical Optics and I do not particular like the textbook I am using and was wondering if anyone had any recommendations on study tools (books or websites) to help me with what we are learning. The class is of the undergraduate level, and the book we are using...

Hey guys, I'm a sophomore thinking about adding into a complex analysis class. The thing is, I'm not sure whether the class would require concepts from Real Analysis (which I haven't taken) or not. The professor didn't list analysis as a prereq but from a conceptual standpoint speaks of the...

hello guys! This semester I was ruthlessly gutted in my Differential Equations class and it has been stressing me severely. I shamefully made a D in the class... I know this is my fault, but at the same time I feel as though the professor teaching it had much to do with it also. He was...

This quarter, I will take the course "Calculus for social sciences." Here's the description: "Introduction to differential and integral calculus with applications to modeling in the biological sciences," and "study of differential and integral calculus with differential and integral calculus...

I recently found out that I didn't pass my Electronics 1 class. I missed the grade letter of a C by 3 points. I have heard that their is online Electronics 1 class online. I go to Lamar University and I was wondering if there are any online Electronics 1 class that is calculus based that can be...

Homework Statement Use the class equation to show that greup G of order pq, with p and q prime, has an element of order p. Homework Equations |G| = \sum |C(x)| (class equation) Z = center of the group G = {z\inG: zy = yz for all y in G} |G| = |Z(x)||C(x)| (counting formula) The...

I have read the section about sphere bundle in Differential Forms in Algebraic Topology,but I still don't understand the Euler class very clear.I don't know how to calculate it for a sphere bundle,for example the sphere bundle of S^2. And I can't work out the exercise at the end of the...

How can I make a constructor for a standard class that accepts my class? For example, I have a class x and I want to make it possible to C++-style cast it to a string (ie "string(x)" rather than "(string)x"); how do I do that/what does the constructor function declaration look like?

Homework Statement Designing a Class A amplifier for project with high voltage gain and high efficency or at least as high as we can get. It has to have a 12V power supply. We have the design but the when we add the power supply that converts the 120v ac to 12v dc our output voltage goes...

Hello and thanks for your consideration, I'd like some insight into the function f(\phi) = \frac {1 - \phi}{\phi - 1} Does this apply to any known modeling situations? Is it recognized as belonging to a more general class of functions that may have interesting or unique characteristics? Or...

I've read about the class equation on Herstein's abstract algebra but haven't understood it well. Would someone here explain the class equation to me and give a short proof for it and then tell me where it can be used?

I am making a CNC machined stirling engine for high school my engineering class. Before I can get started I need people to fill out this survey to help me decide which design to go with. Thanks! Stirling Info http://en.wikipedia.org/wiki/Stirling_engine...

My physics class is doing the popular egg drop experiment. We may only use wooden strips no larger than a 1/4" by 1/4" in cross section (ex: toothpicks, popsicle sticks). We may not use bamboo as it is a grass not a wood. We can only use glue, cement, superglue, or hot glue to hold it...

[b]1. Homework Statement EE3350 Electronics I Term Project "Power Amplifier Design" Objective: You will be designing a proper power amplifier for Good Speakers, Inc. The company will accept only two designs. One of them is Class A amplifier and the other one will be a Class B amplifier...

1. Discrete mathematical structures 2. elementary linear algebra I was interested in taking these two classes but I'm not sure what they are about...? can some one give me a brief explanation ?

This is an example from Bott and Tu 's book DFAT(page 125).The example is in the image.I don't understand why can we get the local degree of the section s by constructing an vector field by parallel translation and calculate the rotating number of it.And why the local degree is 2? Could...

Looking for online Physics 2 class! I'm looking to complete an online physics 2 course but I can't seem to find any good/accredited programs online. I was wondering if anyone knew of any that they can possibly refer me to. I have already completed the Lab portion of the course through the...

I am having trouble understanding how to find the limit of a function (using the definition of a limit). I have a class example, and was wondering if anyone could walk me through the steps. Homework Statement Using the definition of the limit to show that limx→2(x2)=4 f(x) = x2 c=2 L=4...

Hi!The details is in the attached file. I don't understand the sentence which is bolded,why if we extend the D-cochain to a D-cocycle,then we can get a global form which restricts to the d-cohomology class? Any hints?Thank you!:smile:

hey guys, im a Junior in undergrad going for a bs in professional physics. I have always loved physics and always wanted to do something in that field. I am a pretty good student, i get b's and a's and this semester was my first in upper division courses so my grades are suffering as a...

Hi All, I am a real noob with physics...not my best topic. Trying to do the best I can. Just want to run my noob logic past some people much better at physics than me. We did a lab in class and I think I have the correct answers but just want some confirmation. Homework Statement We...

Is it possible for a lever to change from one class to another during its rotation (e.g. it starts out as a third class lever and ends as a first class lever)?

:biggrin: I need a telescope for my astronomy class next semester :biggrin::biggrin::biggrin: and a $700 budget...having a difficult time deciding which one to get :-/

(x1, y1)Υ(x2, y2) ⇔ x1 × y2 = x2 × y1 for all x1, x2 ∈ Z and y1, y2 ∈ Z+ have been shown to be an equivalence relation in tutorial. Specify the equivalence class [(2; 3)] as induced by Υ. i don't understand what it means by 'Specify the equivalence class [(2; 3)] as induced by Υ.'...

I can't seem to figure out how to derive this relation, so a first step or any suggestions would be greatly appreciated. Thank you in advance. Homework Statement After four cycles the amplitude of a damped harmonic oscillator has dropped to 1/e of its initial value. Find the ratio of the...

Hi :) I'm taking my first java course. I took two C++ courses last year, and I understand OOP pretty decently, but I cannot get this java program to work! And I'm beginning to get really frustrated because I can't find my mistake. This is my class file: package studentsjav; __________...

Any advice on this? Although much is review and I was surviving quite easily for the first few chapters and units, I only took grade 11 physics, so many of the concepts are quite new. The professor just skims through very important and difficult concepts and usually goes off on useless tangents...

I'm in my first programming class (in a university and in general), and it's kicking my butt. The homework is brutal. It consumes around ten hours a week just to complete (usually only three or four programs). But that's not the problem, because I'm averaging around an 85-90 in that (haven't...

Hey guys. I'm currently a senior in high school. The high school that I go to has block schedule. I am in Calculus AB this semester and it will continue through next semester. However, I want to switch into Calculus BC. WIll that be too hard? Is it a big jump, or is it next semester when the new...

This is an exercise 6.43 from Bott's Topology book.I'm not asking it's solution,but ask something relative to it. Let \pi :E \to M\ be an oriented rank 2 bundle. \Phi = d(\rho (r)\frac{{d{\theta _\alpha }}}{{2\pi }}) + \frac{1}{{2\pi i}}d(\rho (r){\pi ^*}\sum\limits_\gamma {{\rho _\gamma...

W or NoPass ? What looks worse on a transcript, W or NP? Also, are there ways to withdraw from a Pass/NoPass class with an Incomplete to be finished later? Of course this might be case by case. Basically I am asking this: If you are in danger of getting a NoPass in a class, what is the...

Homework Statement 3) Let a be an integer = 0 and 6 n a natural number. Show that if gcd(a, n) = 1 then 6 there exists b ∈ Z, such that [a] · [b] = [0] and [b] = [0] in 6 Z/Zn Homework Equations The Attempt at a Solution Ok, so I'm still trying to digest the question and so...