Class Definition and 942 Threads

Please refer to the video at 37:02 from the link above. I am struggling with the notation "=" of the property (a) which concludes to [a]=[m]. shouldn't it be [a]⊆[m], just like [m]⊆M.

I think that this is a relatively easy question (no equations) however I cannot seem to find anything on it. "For which specific class of decay is only the Fermi decay mode possible?" I know Fermi decay is ∆S=0 and therefore ∆J=0 type of decay

Hi, I am a first year calculus two student. I found that I have serious trouble understanding the derivation of formulas. For example, I can solve most of the exam problems because they are just using formulas, say arc length = Integral(sqrt( 1+ (dy/dx)^2)dx, but my textbook actually has two...

Hello, Einstein evaluated the size of an atom by analysing a brownian motion, assuming the size of the molecules is a a factor. In order to demonstrate this concept, I want to put some powders with different sizes of grains on a vibrator and watch how a ball moves. What is the expected result...

Hi everyone, just a quick question about college applications. I'm in a STEM program at a public school, and some of the classes that I take are weighted as AP even though they are not official AP classes. Some people that I've talked to have seemed to disregard these as just the school being...

1. The problem statement, all variables and given/known If each element of a group, G, has order which is a power of p, then the order of G is also a prime power. Homework EquationsThe Attempt at a Solution I am not sure really where to get started. I know that the class equation will be used...

Homework Statement I need to identify which class bar 1 and bar 2 belong in based on observed attraction/repulsion. Then I need to determine if the end of 2A would attract, repel, or niether to end 3A. EDIT: Could not get this image in the post due to security reason apparently so here is the...

So in my upper division mechanics course I've stared to not do well on my quizzes. The difference between a fail is 30 points and a few points extra is a 80 -90. The tests have a very fine line, and the teacher does not think this is a issue. So I go to ask him for help. He gets mad at me when...

What I'm here to find out I am in the early stages of planning for a tennis ball launcher I'm doing with my group for a class project. I want to find 2 cheap electric motors that will spin fast enough, and have enough torque, so that I can attach some wheels to the spinning motors for the...

Make everything in public to save time or have public and private data members and functions: 1) Create a "Item" class with the following members and functions: Item_name Item_price item_qty get/set functions 2) Create a "Cart" class with the following members and functions...

I'm a freshman who just finished their first semester at (insert elite university that I don't want to namedrop here), and I am an engineering physics major with a hope to one day do grad school in applied physics at a similar school. Anyway, due to the almost non-existence of a curve and the...

I am planing to assemble a 5.1 channel amplifier. I selected the famous TDA2030 as the basic element and is simple to proceed. But I have a confusion, whether to use some other Class D amplifier for better quality.Conceptually, a Class D amplifier is considered by some music purists to be less...

Hello! Is there a way to find the class equation of SL2(F3), other than writing down all the 24 matrices and do all the necessary computations?

Hello, I will take Classical Mechanics I (upper division) course fall of 2017. I have not seen Mechanics material since fall of 2014 and would like suggestions on how to review the concepts prior to taking the class. I was pretty good in that class and do not need to "re-learn" anything per...

< Mentor Note -- thread moved to HH from the technical physics forums, so no HH Template is shown > Question: Let ~ be the equivalence relation on the set ℤ of integers defined by a~b if a-b is divisible by 5. Let k ∈ Em belong to the equivalence class of m, and l ∈ En belong to the equivalence...

I'm given the code: #include <iostream> using namespace std; class InventoryTag { public: InventoryTag(); int getQuantityRemaining() const; void addInventory(int numItems); private: int quantityRemaining; }; InventoryTag::InventoryTag() { quantityRemaining = 0; } int...

Many a time we all have faced it while sitting in a class. During lectures we have a strong urge to sleep (rather we make a strong effort not to fall asleep. Especially if you are seated in the front rows.) It is not just boredom. I feel it is only when we want to concentrate, we tend trio fall...

I am a physics student trying to self-learn Chern numbers and Chern class. The book I am learning (Nakahara) introduces the total Chern class as an invariant polynomial of local curvature form ##F## ## P(F) = \det (I + t\frac{{iF}}{{2\pi }}) = \sum\limits_{r = 0}^k {{t^r}{P_r}(F)} ## and each...

Can an Engineer briefly answer these questions for me? Its an assignment for my Principles of engineering class. Interviewee name: Interviewee’s specific degree: Interviewee’s place of employment: Interviewee’s email address Please describe your engineering field. What is your current job...

I did horrible in my first 2 tests in physics (electric and magnetism). But when I read the book, I understand everything that it is saying. I understand the derivations, the explanations and the theories. I also did good on the homework that the proffesor gave us. But when it came to the...

Hi everyone. I am currently studying at a community college to attain a degree in Computer Science. I eventually will go on to get a Bachelors in Computer Science therefore will require a semester or two of University Physics or Physics for Engineers depending on which University I attend. I am...

Hi, I am trying to create an array of 20 threads to perform addition of 20 elements of two arrays. I have created an inner class. I don't know if my inner class syntax is correct or not. My code is:public class Question{ static int [ ] input1 = new int[20]; static int [ ] input2 = new...

Is the RHS of the conjugate relationship Ad(g)x = gxg-1 from the Lie algebra equivalent to: <g|λ|g> In the Dirac notation of quantum mechanics? I am looking at this in the context of gluons where g is a 3 x 1 basis matrix consisting of components r,g,b, g-1 is a 1 x 3 matrix consisting of...

Hey guys, So this is what actually made me join today. We are taking a interfacing class were most of us students don't even know how to code. However, I currently work in one of the research groups under the professor who is running the class, he gave me the assignment to figure out what parts...

So I know some school out their will gladly take my money from me, but my question is can you pursue a phd in engineering while working full time, by just taking one class at a time? That is what I'm currently doing for my masters degree, and wondering if it's even possible for a phd. I know...

In class, of all the shapes we tested, the pinwheel won in the total amount of current and voltage, power generated. (used a regular fan and blew a bunch of different blade designs) Question is, why don't we see pinwheels designs for turbines? Where else can I look for turbines designs? Thanks.

Hello all, I just had a few questions about online degree programs and was wondering if they can be done/are worth it. First let me explain my situation as to why I want to do online school as opposed to a brick-and-mortar school. I'm currently in the military and as you can imagine its pretty...

Just a quick question. Wavelength is defined as the distance between two crests of a wave, so in a sound wave, is the wavelength the distance between two compressions.

I run a Maker group for teens in Florida at the Pensacola MESS Hall. We are building a T.E.A. Laser powered by a Wimshurst machine along the lines of a Rimstar project we found on YouTube. But, we have some questions about the laser it will produce: (1) I read that the TEA Laser has high...

The required textbook for my intro signal processing class is "Signal Processing First" by James McClellan. So far I like the book quite a lot because the author does a good job to explain the concepts clearly. However I feel like the book doesn't provide enough practice problems. I just want to...

Hey there everyone! First post here, sadly on a bad note. So I'm currently a second year physics major and I'm really trying to aim to get into a top 20 physics grad program but I just received my grades back from this last semester and I actually did pretty well! However, I found out that I...

Hey guys and gals. So it's the end of the school year and I chose one of my courses to be AP physics 11 since physics is the career I want to pursue. Unfortunately the course didn't run because not enough people signed up and it's freaking me out. Should I take the May AP exam and self study...

Hi, I am using a book for studying UML. It shows attributes without any data types: dataReceived isPrepaid number: String price: Money What is the data type associated with above two i.e dataReceived & isPrepaid & what is their visibility (i.e publc /private). Some body please guide me. Zulfi.

I am curious to know whether or not people on this forum read/review their notes taken in lecture? I have never reviewed notes taken in class. I do quite well in my classes. I do ask questions, participate in lecture, and always go to office hours. I do write lectures notes, but it seems that it...

Physics major. Last year. Should I A. Take calculus three during he next semester AT MY home institution and take computer science during this summer at a community college. Or B. Take calculus 3 this summer and take Theory of Probabilty next semester at my home institution. Let hear some...

Hi, Just made a small thought experiment on the train, haven't really thought about it in depth. I was just wondering, if I created the above scenario (open circuit secondary and a voltmeter), would I get a voltage (assuming there is a difference in turns for primary and secondary)? Neglecting...

ARS Technica reviewed the book Lab Girl about overcoming funding issues to build a world class lab and about being a woman scientist in today's world: http://arstechnica.com/science/2016/05/how-two-determined-scientists-built-a-world-class-lab-out-of-radio-shack-parts/

Working on a project here - I've got the classes [MINUS Billing] defined and, as far as I know, meet the requirements for the constructors, accessors, and mutator functions. My problem lies with the Billing class. It asks me to create an athlete and trainer object inside the billing class but...

iam in class 11th iam suffering from a great difficulty to understand parallex method , inspite of book's example

I have a data set of 120k star systems that I'd like to import into a project, and, while it has a lot of useful infomation, I'd like to display these stars in a visual fashion. This means that I need to figure out the radius, when zoomed into the star system, and its mass, to simulate objects...

I got one correct for my code...what i am missing...any tips or guide? Write a unit test for addInventory(). Call redSweater.addInventory() with parameter sweaterShipment. Print the shown error if the subsequent quantity is incorrect. Sample output for failed unit test given initial quantity is...

Homework Statement So, I'm getting two blocks of zeroes in my console output from this program. After much effort (and stack exchange) I'm still unable to get it working. Could someone point me to a solution? Mod note: Added code tags Homework Equations #include<iostream> #include<iomanip>...

So, I was asked to make a program that will calculate my own grade, and it is required to use subclasses inside a class. main is posted below and cannot be changed: int main() { Grade gradeMe; gradeMe.getExercises(); gradeMe.getClickers(); gradeMe.getLabs(); gradeMe.getTraces()...

Main is posted below and cannot be modified. Still need to fill out the functions needed, only this time I need to use class. int main() { int uRow = 0, uCol = 0; int oRow = NUMROWS - 1, oCol = NUMCOLS - 1; bool win = true; int move = 0; Board board; board.initialize()...

I don't really care about money that much but i would still like to live comfortably and afford a house

Hi All, Looking for Advice on taking Random Signals Class in the summer, I am EE student, Is it very difficult? very challenging or demanding?. I have taken classes in the summer in a community college and I have done OK(B), however I am a little unsure about this one. I work full time and have...

For those that are familiar with the 3 classes of lever (and the fact that all simple machines are fundamentally either a lever or an inclined plane) I have a question regarding rotational levers such as in a crank shaft. It seems to me that a crankshaft could simultaneously be considered more...

Hey people, I need some help, preferably from the Electrical Engineers... Classes start next month and I'm stuck deciding some electives to take during my third mechanical engineering semester. Here's the thing: I decided to take some electives from the EE department so I have a good basis to...

I had a thread on here ( I don't understand physics ) and completely used it as a rant. Well since then I've taken precautions on losing temper and understanding physics. Forging to play on my strengths, I combined my interest in learning about great white sharks and using physics to make it...

Ok, so this is really weird. I am a second year physics major at a decent university. My GPA at the moment is not steller (3.3). I think I totally bombed my lower division linear algebra midterm, and I might (a big maybe, because I am confident that I could pass this class if I put my 110%...