Writing Definition and 712 Threads

Hi, I have a program which is reading in line by line information, saving that, and writing it out to a file. How do I change where the files are created? Also, can I create a folder to write the files out to in my program? The second issue I have is this. right now my program opens the...

Homework Statement Like, if you are writing out one of the blocks on the table of elements chart, you would write out the letter of the element, and then you would write the atomic average (or atamoic mass it is also known as,) on the bottom left , and the atmomic mass on the top to the...

Homework Statement How can I write cos(x) in terms of cot(x)? I tried using the pythagorean identities and fundamental identities but still cannot figure it out. The answer must start as the following: cosine(x)=... Homework Equations All the trig identies. I think it wants me to use...

We have been given three balanced equations to write as net ionic equations. Our teacher forgot to teach us this bit and has now left the college. I'm really stuck, any help would be so kindly appreciated TY x The equations are: 1. Pb(NO3)2 (aq) + 2KCl (aq) = PbCl2(s) + KNO3 (aq)...

Any one has ever tried to write with both hands? I mean being able to do it, I guess if you have a dominated hand, you should practice a lot with your hand writing skill with the "dormant" hand. Do you remember your first grade assignements which asked you to write down a few alphabetical...

I am trying to write a research proposal and hav no idea where to start I'm doing a Masters in Theoretical Physics and want to do a PhD involving such Geometrical Applications to QFT. But the last sentence, besides personal background and a relatively naive version of why I'm interested is all...

Hello everybody, I have a question about the magnetic induction equation. I am interested in the non ideal case, i.e. when there is a non negligible diffusivity, however as regards my question I think that this is not relevant. I first ask the question and then give additional explanations...

Hello all, I would like some insight regarding a creative writing piece I am working on. As I stated on my topic this is not homework, it is an independent science fiction piece I've been working on for some time. I apologize in advance if this is in the wrong forum, and would appreciate...

So I have enough material to graduate, and I'm working on my thesis. I have some questions concerning the thesis writing. I've noticed a lot of other thesis have large sections, if not whole chapters copied from their publications. Is this allowed? My advisor is a nice guy, but a totally...

(keep in mind, its circle math.. :/) Write the equation (x+9)2+(y-5)2=12 in general form.

Homework Statement Write as a series to represent the infinite sum and write the sum as a rational number. 0.71 + 0.7171 + 0.717171 + 0.71717171... Please help with this problem. I have been working on it for almost an hour.

Homework Statement Find all the values for which the series (where n=1 to infinity) \sum((2x-3)/5)^n converges. For these values of x, write the sum of the series as a function of x in simplified form. Please Please help!

Hi An object with temperature 26 degrees Celsius is placed in water with constant temperature of 90 degrees Celsius. If the temperature of the object rises to 70 degrees Celsius in five minutes, what will be the temperature after 10 minutes? I thought of using Newtons law of cooling...

I know how to do basic matrix operations, but sometimes I do calculations on computers and do array operations. How do I write down array operations on paper? For example, say I have two matrices, A and B, and I want to multiply them element by element.

Homework Statement Given:H0-1.6, time in air - 3.02 s, horizontal distance thrown - 10m Solve:V0 and write parametric equations for x(t) and y(t) - the horizontal and vertical positions of the ball Homework Equations h(t)=-4.9t^2+V0t+h0 The Attempt at a Solution for V0 I got 14.268...

Hi Im trying to write an equation for the question below. i did write one but am pretty sure it is wrong because I need to differentiate arctan in it and we have not been taught that yet. Could someone please point me in the right direction with writing it? Homework Statement A...

Hey there, I thought PF can be helpful in many fields other than science. :biggrin: Here's the question:

I think the title is pretty well says it. What are the stereotypes and story devices used in fiction of any variety including film, television, writing, ect that you find to be annoying? I have been watching the first season of the show Fringe and it has reminded me of just how much screams...

Anyone know where I can, possiblely, find the EFE's written only in terms of the metric tensor and the stress-energy tensor? I know that the Ricci Curvature tensor and the Ricci scalar are derived (eventually) from the metric tensor (after a roundabout way through Christoffel symbols). The...

This is my first academic paper that I am writing completely by myself and need some advice from you published authors out there. The journal I am writing for says that they do not want you to cite any review articles. A review article that I am getting information from has some info I want to...

Hi all, so... now that I have to write lab reports at uni level, I'm starting to wonder what software would be best suited for the task. Currently, my workflow goes like this: iWork Pages (or MS Word) for the actual report. imported LaTeX (or Mathematica) PDFs for mathematical equations...

Homework Statement f(t)= 4t t<1 f(t)= 4 t≥1 I need to write f(t) in terms of H(t) Homework Equations H(t-t0)=0 for t<t0 = 1 for t≥t0 The Attempt at a Solution I am not too sure how it is done, as what I read online, people can just immediately...

Homework Statement Assume a rigid body with a massless rod that pivots about point O. Displacement x is measured from equilibrium position. Assuming x is small, that the weight at the end of the rod is 5N and spring constant is 400n/m, obtain the dynamical equation of the system...

I'm writing a scifi story about a human undergoing rapid evolution due to his being repeatedly "connected" to an alien biological machine,that would be controlling the evolution through some kind of program. one of the changes would be a "master" cell that was able to regulate clusters of...

Hi everyone Long time since i posted something. (May be i have posted at the wrong place, Doc Al...feel free to move it) I am in my first year... Basically i will have to start writing research papers from the next year... But i am really interested to start from the first year... I...

I'm currently trying to write a report at the moment with some tables for some data, and it would be ideal for me to put these tables side-by-side if possible. However, I'm not sure as to how this can be achieved; I've currently doing \documentclass{article} with multiple figures of graphs...

I'm trying to write a piece of code for the rule 'i before e except after c'. Heres what I have so far. if(str[4]=='c') && if(str[5]=='ei') printf ("yes\n"); else printf("no\n"); I don't really want the answer but I just want to know if I'm going in the right direction.

Homework Statement We started K-Maps not too long ago, I have no idea how to read these or write these. I am only able to set them up, but as far as understanding prime implicants, max terms, min terms I feel I know nothing. Correct me if I am wrong, but 0's are max terms and 1's are min...

I just have a general question that I came up with while doing homework for my database class. I was asked to write a specific query, and when I checked my answer against the posted solutions, it was different. I don't know that much SQL (yet), but I'm pretty sure that my query would produce the...

for a project i have to open, edit and save a varying amount of files. I use a MATLAB code for this. It works fine and imports all the .sp files in the directory with the fopen() command. The only problem i still have is that i also want to change the extension of the files. Right now i use...

I am doing the write up for one of my labs. In this write up we combined HCl with some of the elements from from the Carbon group (C, Si, Sn, Pb). Naturally, my professor wants us to express what occurred in equation form. But I am not sure if I am doing it correctly... here is what I have...

My friend was moved the way his psychology teacher gives lectures. He is considering writing a few paged essay, detailing why the lectures are so good, and effective. He asked me if it's ok to send the letter to the principal of the universitly. I really don't know. Could it hurt the professor...

Homework Statement This isn't a homework problem, but I just had a general question about the language of writing proofs. I often see words like "suppose", "let", and "consider" in proofs. Could someone explain to me if there are rules to applying these? It doesn't seem like they are just...

I end up writing a LOT when trying to prove stuff. I can go through a legal pad in a week for one class -- and the writing is just scratchwork, so it's all trash. That is too wasteful for me, so I got a paper-sized whiteboard, but I am finding that I need a bigger one. How big should I go...

Hi, I need some help in writing the Hamiltonian function for the following dynamical systems. 1) u''+u=A (1+2*u+3*u^2) 2) u''+u=A/((1-u)^2); In both cases A is a constant and u is a function of t. Any help would be greatly appreciated. Thank you. Manish

Homework Statement What is the proper notation for writing the set of all ordered pairs of real numbers that are in quadrant 1 and 3 of the real plane? Homework Equations The Attempt at a Solution I was thinking something like $\left\{...

Hey guys, I have been searching for an answer to this question for quite some time and I have found nothing. This should be pretty simple, yet for some frustrating reason, I can not get it to work. I want to start some writing 4.5 inches from the top of the page. I am doing...

I use linux on a pc and one of my friends who uses a mac wants me to write a small app for him. It doesn't need any GUI of anything, just a few lines in C++ with a bitmap image for input and an output to a text file. Is there a way for me to compile it in linux so that he'll be able to use it...

I have no idea how to write these two reactions as net ionic equations in order to show relevancy to their respective pH: Na2CO3 + HCl (pH of 10.36) I know that it dissociates into OH- ions since it has a very basic pH and NaHSO4 + HCl (pH of 4.18) I also know that this...

Hello PF members, I need a small help in latex in writing a report! How to include footnotes (in the form of symbol!). For e.g., i have 5 authors..for all these 5 authors i can use $^1$, $^2$, etc as author's address. I mean all are just numbers.. Now for 2 of the 5 authors i want add...

Hey to be honest I am new and don't know very much about science. I don't know if this is even the right place to post this. I am writing a science fiction novel, and basically I want to know, if it is possible for a special element (go with me here) to destroy all types of metal without...

(edit: sorry I made a mistake in the thread title. It's the output that isn't a factor of every component in the equation, that is giving me trouble) Hi! I'm new here, and any help would be greatly appreciated. Homework Statement I am modelling a mass-spring-damper system in which the...

Hello, I am in the writting stage of my master thesis. Actually, I wrote it while I am in progress, but I need to fulfill the requirements of the Faculty of Gradguate Studies (FGS) for the thesis. In doing so, I will face some problems using LATEX for sure, because I am not so familiar with...

can somebody help me on writting a program that displays yo to yn+1 when n=100 and store them in a file. y"=cos(t)*y+y y(0)=1 y'(0)=0 h=0.1 y'=z z'=z'*cos(t)+y yn+1=zn+h*zn*(cos(tn))+yn) tn=t+nh

A little funky title but I couldn't help but word it that way. Anyway I was thinking still have time to make up my mind between going for a physics Ph.D or Engineering B.S. So i figured i could go still for for guidance and hopefully ask some questions that others havn't asked that may intrigue...

In papers, when should I spell a number (sixteen) and when I should write it using numerals (16)?

I am trying to write the term "Sin^2 theta * Sin 2 phi" in terms of spherical Harmonics (they form a combination of Y(2,-2) and Y(2,2)) but the term I get contains the imaginary number 'i'. Am I doing something wrong.. In fact this term is a part of a Hamiltonian and when I get the eigenvalues I...

Homework Statement I have the trajectories of a particle in the space-time: \tau(\sigma) = \frac{1}{a}senh(\sigma) x(\sigma) = \frac{1}{a}cosh(\sigma) How can I write this equations depending on proper time t of the particle? Homework Equations The Attempt at a...

I'm having one hell of a time writing my thesis! I'm writing it as I go because I like to think in terms of systems engineering (breaking things down into blocks). I'm certainly no where near done with my research; however, there are lots of stuff I have done that can be written up now. Our...

Homework Statement How to write an engineering report? Could you refer me to links for how to write engineering reports? I had been given a task to make a jib crane, and then to write an engineering report. Anything would be helpful. Cheers Homework Equations The...