Writing Definition and 712 Threads

Attempt: No clue what equations to use from here.

Hi, I'm helping someone with writing a resume and had few questions. There is a final year project which is mostly covered during last 2 semesters of EEE BS program. But almost every semester also has a semester-end project. What's the proper term for such 'semester-end projects' or 'minor...

Homework Statement "Using the time module, write a program that tells one the current time in hours, minutes, and seconds, and time since January the first of 1970." Homework Equations import time % = mod division int = returns integer value of number The Attempt at a Solution import time...

So I've taken this Linear Algebra class as an elective. So there's stuff that is so obvious and logically/analytically easy to prove but I honestly don't understand how to prove them using the standard way. So what should I do about this ? And I really like linear algebra so I don't want to mess...

Homework Statement Express each statement symbolically, including a quantification of all variables which makes the universe explicit. Negate the symbolic statement. Every positive real number has a real square root. (Do not use the symbol √ in your solution.) Homework EquationsThe Attempt...

Hi! I would like to apply to a postdoc position, but one of the requirements is to detail at least a 2-page research plan on a certain topic. I haven't worked on that topic specifically before, so, I would need to research it. However, this may take sometime to know exactly what to do, and I...

Hello, I'm trying to write a wave function for a perturbed system. The original (unperturbed) wave function has two solutions for even and odd n-values, for example ##sin(n \pi x)## for even-n and ##cos(n\pi x)## for odd-n. Then, the perturbed wave function also has an even and odd solutions...

Homework Statement [/B] Write vector and parametric equations for the line that goes through the points P(–3, 5, 2) and Q(2, 7, 1). Homework EquationsThe Attempt at a Solution First I find the direction vector for PQ. PQ=Q-P = (2,7,1)-(-3,5,2) =[2-(-3),7-5,1-2] =5,2,-1 PQ= (5,2,-1) Now I...

Dear Everyone, I am trying to figure what is the correct phrase in the bolden phrase. The article, where I am doing my research on, states: Let S be the set of all 2x2 matrices with equal positive integral entries. Let T be the set of all 2x2 matrices with equal integral entries. My professors...

Hi! I'm trying to solve a problem and I'm lost. Would someone kindly help me with the solution, please? 1. Homework Statement A plain electromagnetic wave with a 20GHz frequency moves in the positive direction of the Y axis and its magnetic field is oriented along the Z axis. The amplitude of...

In ##c=1## units, from my SR courses I was told for example, that the Minkowski metric ## ds^2 = -dt^2 + dx^2 + dy^2 + dz^2 ## can be written in matrix form as the below.. \eta = \begin{pmatrix} -1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{pmatrix} And it was just...

I enjoy writing in LaTeX and was wondering if it would be a bad idea if I wrote my notes up in LaTeX. Would I be better off just making handwritten notes for revision? Has anyone tried to revise by writing up concepts/equations in LaTeX and was it more useful than handwriting notes?

When writing the number 3, my hand seems to stutter or stall slightly before i complete the 3. This only happens some of the time though. I am only 16 years old but I have also suffered a minor concussion. Does this happen to anyone else, could it correlate with a deeper issue?

Hi I'm currently writing a YA novel where the protagonist needs to leave Earth to save his mother. Meanwhile, the protagonist's mother is back on earth. I would prefer if he could be back "instantly". Superluminal traveling is possible in this story. If the protagonists travels at...

Hi, gang. Thanks for letting me join. Being that I am an author rather than an expert in physics, perhaps you wonder what drives me to join this forum. It is as simple as the need for new and current science fiction or fantasy story ideas. Thus I track the current conversations in most every...

What tips should I follow to write a perfect essay?

I have a simple question about the notation of the nabla operator in Vector Analysis. The nabla operator is a vector differential operator and it is written as: $$\nabla = \hat{x} \frac {∂} {∂x} + \hat{y} \frac {∂} {∂y} + \hat{z} \frac {∂} {∂z}$$ Is it okay if we accented nabla by a right...

Homework Statement Problem 16.39 [/B] The viscous force of a liquid in laminar flow through length L is given by ##F_v=4\pi\etaL v_m## where ##\eta## is liquid viscosity and ##v_m## is maximum velocity of the fluid. Find an expression for ##v_m## in terms of p1, p2 (pressure at each end) and...

I’m wanting to write a realistic sci-fi book but there are a few concepts I don’t understand how to apply. I’m not good with physics so what I’m wanting to know is how to calculate what pressure and temperature would be required for sustained nuclear fusion for something comparable to a star...

I'm looking to get into the realm of science fiction writing and am currently working out how the main "SciFi energy source" works in this world I'm trying to make. Fusion reactors are the obvious go-to, but I wanted to get creative, that said: how plausible/effective would it be to directly...

Let ##G## be a group. Suppose that the map from ##G## to itself defined by ##\phi (g) = g^{-1}## is a homomorphism. Prove that ##G## is abelian. So I came up with two ways of writing the solution and am wondering whether they are equivalent and which one is preferable: 1) Let ##a,b \in G##...

I am a senior in college, working on getting my bachelors degree in Mechanical Engineering. I am currently taking an upper division writing class about writing in engineering, and am required to interview someone either presently working or has worked in the field, about writing in engineering...

What's the best way to "practice" writing latex text? I'd like to write, revew, edit, write etc. before posting in a forum or in Insight. Or, can the latex compiler be downloaded?

How do I know if a proof I am writing or reading is informal or formal enough? Of course there are obvious distinctions like a formal proofs cannot constitute a drawing (e.g. venn diagrams, triangles for the triangle inequality), but sometimes I read proofs that uses phrases like "Continue in...

Hi, possibly a weird question, I am looking for advice or suggestions. Currently I am going through the prealgebra art of problem solving book as I’d like to start using that series of books and may as well start with the basics to get a thorough understanding (I understand algebra and basic...

Homework Statement [/B] A 0.02 meters long conductor is placed perpendicular in a homogen magnetic field. Current through the conductor is changed. And we have measured the data here: How can we write the magnetic flux density the correct way? How do I know how many digits my answer should...

Let P(x) denote the statement "x is an accountant", and let Q(x) denote that statement "x owns a Porsche".Write the following statements symbolically. i) Some accountants own a Porsche. ii) All owners of Porsche are accountants.

Homework Statement Write an alternate vector equation for the following line. Change both the point and the direction vector: w⃗ =(4,−1,3)+t(−2,1,7) Homework EquationsThe Attempt at a Solution Did I write a proper alternate vector equation here? I'm still new to vectors in 3-space any tips or...

I was wondering about "writing a module to a linux kernel." This question haven't asked yet. Would you please explain why linuxers write such modules to a linux kernel? What is the reason? Thank you.

Homework Statement Write a vector equation for the line that passes through the point P(–1, 0, 3) and is parallel to the y-axis. Homework Equations (x,y)=(x_0,y_0)+t(a,b) The Attempt at a Solution u ⃗=(0,1,0) (x,y,z)=(-1,0,3)+t(0,1,0)

Until this forum I had never heard of LaTex for writing mathematical expressions. Can anyone help me: A. find out where to download these programs. B. find someone who would be willing to provide guidance on installing and using these programs C. find LaTex and MathJax primers I can print...

Hello, I want to write on the bars inside the subplots of a seaborn.FacetGrid a number that represents their height on the y-scale. How can I do that? Suppose the code for the FacetGrid is g = sns.FacetGrid(df, row = 'feat1', size = 5, aspect = 2) g = (g.map(sns.countplot, 'feat2', hue =...

A few minutes ago I was searching for details of a particular experiment and google came up with a list of companies offering essay writing services. I had a quick glance at one of them and they seemed to offer a whole range of services going from writing up high school projects to writing up...

Suppose I have a 1-D harmonic oscilator with angular velocity ##\omega## and eigenstates ##|j>## and let the state at ##t=0## be given by ##|\Psi(0)>##. We write ##\Psi(t) = \hat{U}(t)\Psi(0)##. Write ##\hat{U}(t)## as sum over energy eigenstates. I've previously shown that ##\hat{H} = \sum_j...

Hello all, I revised a resume for data science positions. I empathized on skills that are needed for the positions like statistics/mathematics and programming. I mention that I am familiar with the theory of many machine learning algorithms and Python libraries used for data analysis. I still...

Homework Statement I have the following integral, $$\frac{1}{\sigma \sqrt{2\pi} t} \int_{-\infty}^{0} \exp[\frac{-1}{2\sigma ^2} (\frac{x-x_0}{t} - p_0)^2]dx$$ that I wish to write in terms of the error function, $$erf(x) = \frac{2}{\sqrt{\pi}} \int_{0}^{x} e^{-g^2}dg$$ However, I can't seem...

Greg Bernhardt submitted a new PF Insights post The Birth of a Textbook Continue reading the Original PF Insights Post.

Homework Statement I'm having some issues understanding a number of concepts in this section here. I attached the corresponding figure at the end of the post for reference. Issue 1) 1st of all, I understand that a Hamiltonian can be written as such $$H = T_2 - T_0 + U$$ whereby ##T_2##...

I use this when making exams for all my courses. It goes in the preable or the very beginning of the .tex file. Note the use of the commands, I also include commands imported by the file macros! Macros is simiply a .tex file defining your own commands. I have included in another post a list...

So I'm a fourth year EE & Physics student without a previous work experience and unfortunately with bad grades, currently I'm sitting on a 76 average, the thing is that my first year was rough and that's where most of my bad grades are, which are mostly mathematics courses, otherwise I have...

Dear Everyone, I need to translate this following statement into a symbolic logical form of the statement: The square of every odd integer is one more than an integral multiple of 4. Thanks, Cbarker1

Hello, this is my first posting on this forum. I enjoyed Chemistry in high school, though the arts were where my abilities drew me. I've learned that a ratio of 2 hydrogen to 1 oxygen, when ignited by a certain amount of heat, will create a small amount of water. I will give a brief outline on...

Dear, I am writing a report of a tool I have developed where there is a chapter with all the formulas included in the tool. I have a formula like the following: P(l,1)=\sum_k PF(k,l) but P(l,1) contains the sum of all the positive PFs, while P(l,2) contains the sum of all the negative PFs. Is...

Every time you buy a card the price goes up 20 units. The first card costs 60 units. How would you write an equation to find the TOTAL cost for X cards bought? I know how to get a price of an individual card by using the equation f(x)=20X+40. How would I write an equation that would add up the...

Hello, I'm studying for a test this Friday and I have two problems that have completely stumped me. I'm not sure how to solve either. Any help would be greatly appreciated.

Hi all, Maybe most people would say that physics grad schools (PhD) programs don't care about your GRE writing score, but I have a sort of quick question: how much effort should I put into the Writing sections. I took my first GRE earlier this month, but messed up both of my writing sections...

Firstly, sorry I didn't know where was the correct place to put this. I'd like to know from publishers or published authors etc. I've just started writing a textbook on school maths. Preferrably I would like to use LibreOffice, but I could use Latex too. Do publishers prefer Latex, or would...

Hello everyone, I have a complex number problem that i would greatly appreciate some help with. Thanks in advance to anyone offering their time to make a contribution. Q) Write the following in polar form: I have attempted the question (please see my working below) and have been advised that i...

I am currently writing my first scientific paper, but I've never really had any proper training on the specifics of writing one particularly in citing references. The scenario is this: Say I'm reading paper A that wrote about result X which was cited from paper B. I also want to cite result X...

Homework Statement My task is to write a program that reads from the .txt file into a list which contains two parts, the part of the text from the file and a pointer to the next element. Here are the specifications of the problem: When reading from the file you should separate the letters from...