Review Definition and 459 Threads

Here's the solution I used for an online coding test with a major employer and I got rejected. Let me know about improvements I could make. Thanks. using System; using System.Collections.Generic; using System.Linq; class Node { public int Val { get; set; } public Node Right { get...

Homework Statement Calculate Work(w) when 6.5L of an ideal gas at an initial pressure of 34.3atm is expanded or compressed isothermally to a final volume of 34.3L reversibly. Answer in J Homework Equations PV=nRT P1V1=P2V2 w=-nRT In(V2/V1) The Attempt at a Solution Using w=-nRT In(V2/V1) I'm...

Hi All, Happy 2017! I am a first year PhD student at a well respected research university for Fluid Dynamics research in England. My PhD research is in the field of Geophysical and Astrophysical Fluid Dynamics. I am interested in gaining some writing, and publishing experience and I thought...

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...

Hi, so I'm taking calculus 1 this year however I haven't taken precalculus in several years. I don't remember any of it, and the textbook of the course doesn't review it at all(they just sample you questions) and I'm having issues solving the precalculus review questions(how necessary is it that...

Homework Statement My calc class is having me review precalc(which I'm really rusty on...) 21. Find sin θ, sec θ, and cot θ if tan θ = 27 22. Find sin θ, cos θ, and sec θ if cot θ = 4. 23. Find cos 2θ if sin θ = 15 24. Find sin 2θ and cos 2θ if tan θ = √2 25. Find cos θ and tan θ if sin θ =...

Hello, I am in my first semester of graduate school after 4 years being out of school. I brushed up on calculus but some essentials are gone. I was doing kinetic problems and had to find concentrations. I automatically knew to get rid of ln x I need to use an exponential. My mind went blank when...

How to submit paper to physical review letter? is there any specific criteria such as recomendation from expert? or can we submit without recomendation?

Note: for easy reference, "serious" questions and such are italicized. I also should note that although the title says "science", I include many references to mathematics (I suppose one could argue that it is a science in some senses). Furthermore, in another thread that I've posted, some people...

In September I will be a Junior in high school (11th grade). I am already taking Chemistry, and thinking about taking Physics also. I have basic trigonometry knowledge (I will also be taking A2T (Algebra 2, Trig) at the same time as this course. The first half of the year is College Physics I...

Background: It has been about a year and a half since I took Calc 3 so I am not as familiar with using derivatives as I would like to be. Basically my math dept. had a concentration in math-stats that didn't even require differential equations at all, so I wasn't expecting to take the course...

Hi guys, some time ago i tried to purchase some books coming from the cheap "Pearson International Edition" and i found that they are horrible, chapters are messed up and weird stuff is everywhere in the book. Now i want to buy a book from the cheap "Wiley International Edition", it looks like...

Hi, Jake here. I've created some graphics about solar cells that covers high level, general info and even delves into some atomic-level subjects. However, I'm no physicist and I'm sure it shows. If any of you could take a quick look at my work and review for errors, that would be awesome. My...

Homework Statement Would you see the same thin film interference pattern in a film of soap surrounded by air and a film of soap on glass? Why or why not? Homework Equations None The Attempt at a Solution Yes, you would see the same thin film interference pattern in a film of soap surrounded...

What should I review for an introductory probability course? Here is the course description. Math 224 I believe is Calculus 3 at this school( multivariable). 380. Probability and Statistics (3) Prerequisite: MATH 224. Frequency interpretation of probability. Axioms of probability theory...

Hello electrical engineers and hobbyists of PhysicsForums! This is my first post (I think... I might have posted before) and I am a junior-year EEE student at a local University. I have some free time this summer and want to study/review some concepts to be fresh when I need them for my...

Homework Statement , relevant equations, and the attempt at a solution are all in the attached file. I was reading through Invitation to Discrete Mathematics and attempted to solve an exercise that involved a proof. I've typeset everything in LaTeX and made a PDF out of it so that it does not...

Homework Statement An object of mass m is allowed to slide down a frictionless ramp of angle θ and its speed at the bottom is recorded as v. If this same process was followed on a planet with twice the gravitational acceleration as Earth, what would be its final speed? Homework Equations The...

Hey everyone, I need to take Gen. Chem 2, and planned on doing it over the Summer in a 6-week condensed course with another 9-week programming class. I'm not sure if this is overboard, but I feel like it should be manageable with no jobs or interns this Summer. The reason I want to take it this...

Hello! I took a quality certification test yesterday and there was a question on there about torque wrench formulas. I didn't have anything about that in my notes, so I took some time this morning to create a cheat sheet based on what I could find on the web. 1) In some of the forums, they...

Maybe you saw the piece about this star surgeon's personal life in Vanity Fair, mythomaniac lies about getting married by the Pope, Putin and the Obamas attending. If it is too good to be true, it probably ain't true. The guy has a base in Sweden, at Karolinska Institutet, the home of the Nobel...

Homework Statement It's been a minute since I've used this stuff. Name the Ionic Compound Ca(MnO4)2 Ba(HCO3)2 UO3 NaH2PO4 Homework Equations In my book it says you name the cation first then add an Ide to the root. In UO3 this seems to work as its Uranium Oxide. But for the others I am not...

I will be transferring from a community college to a university where I will be taking Physics II. We will cover electricity, magnetism, waves, optics, and perhaps even some modern physics. The catalog at my new university says that a co-requisite is Calculus II where they cover integration...

I'm seeing a presentation of Euclidean geometry that isn't hand-holdy. I've looked at some textbooks used in high schools these days, and it's hard to find the axioms and theorems in the midst of all the condescension. I just want something that states the definitions, axioms and basic...

Hello. Is there a review paper about topological insulator which is written for non-physics major people? If it will be helpful, I know classical physics, basics about band theory and little bit of modern physics, and have just finished learning quantum mechanics (with a book written by...

... some of your own theories, what would you call it? Like, say I wanted to publish a review paper on the mating of tigers, then you may call the title: The Mating of Tigers - A Review But what now if I wanted to include my own theories on why they mate? Can I even do this without data of my...

I'm currently studying from a rented Stewarts Multivariable Calculus: Concepts and Contexts however for single varibale calculus I used a lot of different sources for study Kahn, Mooculus and Pauls. I've been self studying calculus for for about a year and a half now. In regards to moving to...

Haven't seen a thread on this before so I'll start one. The Raspberry Pi 2 is really a marvel. For $30 you get a 90MHz quad-core processor and 1GB RAM on a Linux platform. The platform also comes standard with an ethernet connector, 4 USB ports, HDMI, and a micro SD slot. I picked up my...

Is there some kind of online site where I can find reviews about college textbooks (preferably physics related) out there? I am considering to have my own collection of books in my field of research but I don't want to spend my savings on something I will find myself disappointed later.

Publisher retracts 64 articles for fake peer reviews Apparently some journals let paper authors suggest reviewers - including their email addresses. How could this possibly go wrong? 230 in three years is probably just the tip of the iceberg. I wonder how many more pass with more subtle fake...

More than 300 years ago Galileo Galilei began to revise the geocentric model and he defended the heliocentrism model, now that still use the geocentric model and helps to much, time (time, day, month and year are based on geocentric model), geometry (Euclid), math, the same system of...

If you had your choice of any three of the world's most qualified cosmologists, or astrophysicists, to review your manuscript, which three would you choose? Thank you. :)

That's the question. When I ask that I'm talking about science books, most importantly, Mathematics and Physics. My aim is to avoid taking notes, I think it would be a waste of time if there are summarized books out there. For example, there could be summarized books written for refreshing...

Hi - doing a physics honors degree by distance learning, and will need to submit some assignments in the reference style used by the journal Physics review B (PRB). I have looked into this and have downloaded MikTex (which includes RevTex that PRB specifies), plus Winedt 9. So far so good...

I am currently writing a funding essay for a (taught) postgraduate degree and I'd rather have a refresher on modern cosmology. As such, is anyone around aware of a recent early universe review article in the arxiv? I am not keen on learning the "basic stuff", just a review article of what has...

Hello, So, I'm running into a bit of a problem. I'm seeing an implication of something well-established in GR, that I haven't seen mentioned anywhere before and would like to perhaps write a paper on it to get peer-reviewed (or more accurately, I'd like to ask questions that I think may lead to...

Need 2nd opinion on circled questions. I want to check if my answers are correct. (My teacher just had a divorce and is on leave, so no one to ask for help) Work sheet in attachment Thanks

Hey guys, I was an average physics major as an undergrad who entered medical school. I graduated from undergrad about 4 years ago and have been inundated with medicine since then - so I haven't had much of a chance to review old mathematics and physics. I will be starting an MS in BME in August...

Physics Principles and Problems by Zitzewitz General Physics Textbook The book is by the McGraw and they are known for the good textbooks. read this book at my school but my school went so slow through the chapters so I read the book in a month, 1 chapter a day a total of 30 chapters, each...

Good morning! So, I graduated in 2013 and got a job in industry. Now, I'm starting grad school in the fall. That's a 2.5 year gap; I'd like to brush up on my skills and shore up my weaknesses. Anyone have recommendations? In particular, for Math Methods and skills? As far as Undergraduate...

<<Mentor note: Thread merged with duplicate from other forum.>> Half an octagonal prism. A small weight is placed 2 cm from the centreline of the vessel. The rod on which the weight is on is placed at (L/2) i.e at the center of the length of the vessel. The height of center of gravity from the...

Is peer review legitament anymore? I was having a discussion with a friend of mine regarding academia. He was explaining to me why he left with a masters as opposed to a PhD (his original plan). One major reason he cited was how political and unscientific publishing in journals has become. I did...

Homework Statement Three Boxes, A, B, and C, are connected to each other using light vertical ropes, with box B hanging below box A, and C hanging below B. Call the tension in the rope connecting A and B "T_1" and that between B and C "T_2". A constant upward force F is applied to box A...

Hello, I want to study physics. I live in U. S. and happen to be quadriplegic, so can’t attend a regular university. After doing extensive research into online schools, I finally found Athabasca University. They seemed promising because they mail out lab kits for their physics courses. Well...

What are your opinions on this book? I know that many physicists like to present even the experimental results of quantum mechanics in a distorted way; does this book do so? All I am looking for is a resource where I can learn, in layman's terms for now, about quantum mechanics. I don't want to...

I am trying to dig deep into classical mechanics. Among many suggestions, this was an odd one to me. I know of Arnold Sommerfeld and his work, but I have not read any of his works(books, papers, .etc). I tried to find reviews of this book online to no avail. If there are people who have read the...

Hi everybody & a happy new year! There is a book titled "Asimov's new guide to science" about which I was going through. I never found a proper review about the book. If anybody knows anything about the book, could you provide a review along with a short summary.

http://www.bmj.com/content/349/bmj.g7094

Homework Statement A 40 turn circular coil of a 4.0 cm radius and a total resistance of 0.20 Ω is placed in a uniform magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies with time as B = 50*sin(10π*t) mT where t is measured in s. What is...

Hi , I finished my undergrad major in physics this fall. I wish to apply to grad school for next fall, so I need some book review books on physics, I n my university we followed Griffith's intro to QM as textbook, I solved almost all the problems there upto chapt 7, but this seemed a more...