Review Definition and 459 Threads

1. Find the horizontal asymptotes of the graph of the function $$g(x) = \frac{|f(x)|}{x-2}$$ if $$f(x)$$ satisfies inequality $$f(x+1) \le x \le f(x)+1$$ for every real $$x$$. 2. Let $$f: R->R$$ be a function that is differentiable at zero and such that $$f(0) = 0$$. Show that for each...

Hello, I have been doing a review test on Geometry 1 on Sparknotes (http://www.sparknotes.com/math/geometry1/review/quiz.html), however I came across two questions which I got incorrect answers for and which I found the provided solutions questionable. The first is Question 1 (attached). I...

Homework Statement What's the domain of 14/x2-x-6, in interval notation? Homework Equations \underline{14}x2-x-6 The Attempt at a Solution [3, + infinity) [-2,- infinity) Sorry, I can't find the infinity symbol Thx

I have the rather fortunate task of reading to completion Eric Poisson's review article on point particle equations of motion in curved spacetime, http://relativity.livingreviews.org/Articles/lrr-2011-7/ . It's a rather long and very technical review. I've only ever read one review article in...

Hi, I've been looking for a string theory review for a beginner graduate student. However, there is a vast number of reviews so it's easy to get lost. Does anyone know about a review article or any kind of material to begin with String Theory? Thanks.

Homework Statement Im trying to solve these review questions but am second guessing my answers. http://puu.sh/aKk5W/9695c07739.png http://puu.sh/aKk6y/903fceeb2d.png http://puu.sh/aKkgV/74580ed488.png http://puu.sh/aKkKm/3c1e9d1544.png http://puu.sh/aKkN4/acf042c92b.png...

Homework Statement The redox reaction of peroxydisulfate with iodide has been used for many years as part of the iodine clock reaction which introduces students to kinetics. If E°cell = 1.587 V and E° of the cathode half-cell is 0.536 V, what is E° of the anode half-cell? S2O82–(aq) + 2H+ +...

I am working out of the 2010 lindeburg book which can be found here. The solution is in the book so I am actually looking for an explanation rather than a solutution. http://www.scribd.com/doc/113765067/FE-Review-Manual-Lindeburg-2010 this is chapter 10 pg 8 in the chapter, reviewing the...

Homework Statement My source textbook is the community college / junior college (confer: undergraduate-lower division) probability and statistics textbook: An Introduction to Mathematical Statistics and Its Applications, 2nd Edition Authors: Richard J. Larsen, Morris L. Marx 1986...

Homework Statement The Binomial Distribution - already developed by Jacob Bernoulli (in 1713), et alii, before Abraham de Moivre (1667-1754 CE), et alii, developed the Normal Distribution as an approximation for it (id est, the Binomial Distribution) - gives the discrete probability...

Hi, I'm going on a trip in August for a whole month and I would like to take this time to review some of what I have learned during my physics major. Do you have a book to recommend? Something like: https://www.amazon.com/gp/product/0486652270/?tag=pfamazon01-20 or...

Homework Statement 2: Some proofs: a) If ##\{ v_1 , v_2...v_n \} ## are linearly independent in a real vector space, so are any subset of them. b) If any subset of vectors ##\{ v_1 , v_2...v_n \} ## in a real vector space are linearly dependent, then the whole set of vectors are linearly...

I have a friend that wants to return to the local community college for a degree in chemistry. He is really rusty at math. Can anyone recommend a good free ebook for teaching oneself algebra. Solutions are a bonus, but answers are a must. Thanks, Chris Maness

I am planning to do some work on quark fragment into hadrons, and I have heard some models like Lund Model, feynman-field model and so on. Is there any good review articles on the topic of fragmentation model? (Recent years is better) Best Regards!

After 13 years of on and off schooling, I am (yay!) getting my B.A. in mathematics in... a couple of weeks. As most undergraduates I am intimidated at the prospect of graduate school and the pace of the work. When I talk to grad students I hear how bone-crushingly hard everything is, yadda...

I'm going to take the Mechanical FE Exam, does anyone have any suggestion regarding which review or question book/ resources may be more helpful to study? ( beside the NCEES Reference Handbook) Thank you in advance for sharing your experiences.

Dear all, I am looking to refresh my memory as to some material at a precalculus level. At the moment I am traversing a course in single variable calculus but I feel some review would be useful. The following is a list of materials readily available to me so I would appreciate any guidance...

Hey everyone, Recently I have been working on my teaching degree and doing field experience. Because relativity is part of the Georgia Science standards, I had to make a relativity lab. The experiment is actually measuring time dilation using GPS in the phones similar to Hafele–Keating...

Homework Statement define a function f:H--> gHg^{-1} Homework Equations prove if f is 1-1 and onto.The Attempt at a Solution 1-1: f(h1)=f(h2) gh1g^{-1}=gh2g^{-1} h1=h2 (left and right cancellations) onto: f(g^{-1}hg)=gg^{-1}hgg^{-1}=h so every h belonging to H has an image of g^{-1}hg...

Hello, I've forgotten much of what I learned in my undergraduate thermal physics class. This is unfortunate, as my statistical mechanics class just builds on those concepts, especially the differential relationships between various state variables. I was wondering if someone could link me to...

so in my book there is an example basically saying that linear transformations can be applied to basis vectors or, more specifically, i think they're using orthonormal basis vectors |e1>,|e2>, ... i'm just a little confused on how they're applying it to the basis vectors. my book...

Can somebody please give me a heads up on if I solved these two problems correctly, I appreciate it, thank you! d) In setting up a new department, a corporation executive must select a manager from among 4 applicant, 3 clerks from among 9 applicants, and 2 secretaries from among 7 applicants...

I think I almost got this problem would you review or correct me please?: A spring with a spring constant k=34/Nm is attached to a block of mass M1=1.5kg. Initially that block is at rest on a friction less surface. A second block, M2, of mass of 4.5kg is moving with speed v= 5.5m/s toward the...

Hey everyone, I'm interested in people's opinions about Impact Factors and how useful they are in ranking scientific journals. For extra information I've made an infographic about the top physics journals as measured by Thomson Reuters in their journal citation reports and it's accessible here...

Thank you for taking the time to read my thread. I do not agree with the TA's correction of my quiz and would appreciate if someone could give it a look before I approach him about it. Homework Statement Cobalt-60 has a half-life of 5.24 years. How long would it take for a 100 mg sample of...

Hello MHB. I need your help to confirm that I have got the proof right of a very important theorem. Theorem 2-13 in Spivak's Calculus on Manifolds. Let $p\leq n$ and $f:\mathbb R^n\to\mathbb R^p$ be a continuously differentiable function in an open set $O$ of $\mathbb R^n$. Let $a$ be a...

Can somebody in this forum please review my fanart? Medium: Microsoft Paint Fanart Subject: Valkyria Chronicles Fanart #1: Corporal Isara Gunther http://imageshack.us/a/img15/2049/xrhv.png Fanart #2: Edelweiss http://imageshack.us/a/img845/6687/edelweiss.jpg

I seldom review new electronics and new OS, but this one got to me. Please note that I'm not a rabid fan of anything. I have Macs, Windows, Android phone, and Apple iPads. I use them all. But I did like the IoS interface, which I found very intuitive and very easy to see, especially with my...

I'm looking for some engineering types to have a play around with my thermodynamic model of an internal combustion engine and reply with any thoughts, errors they find, spurious results or anything else which doesn't seem quite right...

Homework Statement Consider g(ξ) = [(2H)/π] arctan(ξ). Plot a graph of the function g(ξ). Imagine a line that passes through the point on the curve at ξ0 = 1.30, and which is tangent to the curve at that point. Where does the tangent line intersect the vertical axis? [DATA: H = 2.00 ; ξ0 =...

Homework Statement z=1 + e^(iθ) calculate z^2 and lzl^2 Homework Equations The Attempt at a Solution for z^2 (1+e^(iθ))(1+e^(iθ)) = 1 + 2e^(iθ) + e^(i2θ).. is that the final answer? i expanded it into cosines and sines as well but that doesn't simplify anymore i don't...

For a triangle with sides $$a$$, $$b$$, $$c$$ and angle $$C$$, where the angle $$C$$ subtends the side $$c$$, show that $$c \geqslant (a+b) \sin \left( \frac C2 \right)$$ _______ Let us stipulate $$0^\circ < C < 180^\circ$$ and of course $$a,b,c > 0$$. Consequently, $$0^\circ < \frac C2...

Forum, I would love if you had a look at my proof below and gave me some feedback. Is the approach valid? Perhaps you have an alternative way to solve the problem? Anything helps! Problem: Prove that there exist no positive integers $$x$$ and $$y$$ such that $$x^2 -y^2 = 270$$. Proof: Given...

I'm starting my junior year in physics after a year out of the system. What do you think are some of the best sources/books/etc for someone in my position? I have a little under two months of time available to me. I've been rereading my college textbooks cover to cover, and am wondering if...

I'm thinking of buying this nice DSO for under 1k $US for home use. It's the 70 MHz model in the Rigol DS2000 series. But that's not why I'm posting. I wanted to share these video reviews of the scope which are a real hoot -- provided you have spent a lot of your time using oscilloscopes...

Dear All, I wonder if there are any constraints about posting a paper draft on arXiv before the submission to PRB? If there is any legal constraints what are they? What other things which may affect the paper's publication? for example: Editors not feeling excited about the paper because it...

Can anyone help me understand this questions from 800score.com ? I'm finding it hard to understand the modulus function Solve 14 - 9|x - 8| = 15 Kindly review this question and help me out on this as my exams are nearing. Thank You.

My company is looking to have our safety PLC code reviewed by an independent third party. The machine is a ~$1million piece of capital equipment, my company is based in New Hampshire, and we're using B&R. Can anyone point me to an independent reviewer?

Hi all, I'm taking a systems modeling class and as such a portion of the class consists of a differential equations review, mostly centered around Laplace transforms and some functions I've never had to deal with before so I was hoping for a bit of help if you'd all be so obliged! I have quite a...

Hi there, I'm a university student and am stuck regarding a literature review for my individual project. I was given a schematic sketch of the setup of my experiment that showed a force acting on a hollow ring, and a strain gauges attached on the ring measured strain for the set force. I was...

I'm scheduled to take Calculus II this Fall semester, but it will have been over a year since I'd taken Calculus I. I am aware that I need to review, but what are some are the major concepts I should review to adequately prepare for the infamous Calc II?

Hi these are questions from my test review that i am unsure of, i posted question and my answer if you can tell me if I've gotten right answer that would be much appreciated! Let C be the curve with the equations x = 2 - t^3, y = 2t - 6, z = \ln(t) Find the point where C intersects the...

Hi guys, I am writing a 400 page high school theory physics textbook, it will be 100 pages per chapter, I have completed the first chapter so is it possible for me to send it to someone to give me some feedback? :) Please =3 If you are interested in having a look at it comment here and I will...

I have a physics test in a week and am having trouble coming up with the proper equations to solve the problems. Does anybody want to offer hint or guidelines to solving these? I have been working on these but I don't think I am approaching the questions appropriately. 1) A 920-kg sports car...

Having trouble with some review circuits using nodal analysis :( Homework Statement I'm trying to find node voltages for v1, v2, and v3. I = 3.1A Homework Equations V=IR The Attempt at a Solution My method of going about and solving this was fairly straight forward I thought...

Homework Statement A rod of negligible mass is supported by a hinge at the wall by a horizontal wire fastened at a 30 degree angle one-third of the way along the rod. A weight of 12 N hangs from the left end of the rod. a) Find the tension (T) in the horizontal wire. (T = 62.2 N) b) Find...

Please see attached. I was looking for an explanation of the answer I have attached. Its been a little while and was just looking for the logic behind the differentiation shown for this problem. Its basically an optimization problem where I am looking for the minimum angle (theta) for the...

I always like to have some popular physics book by the bed for "easy" reading late at night. I'm almost finished with my current book, "The strangest man," a biography on Paul Dirac, and need to look for another. Any suggestions? I was thinking of Dancing Wu Li masters, but it seems kind of...

School writing center is closed during the break, so I need a help from PF. I have to submit my application ASAP, so my references can get the email with instructions to submit their letters. This is for Mathematics REU for small college. I am physics and math double major and I have not...

Description: This course covers stellar astrophysics, solar physics, star formation, stellar evolution, processes in the interstellar medium, galactic dynamics and evolution, formation of galaxies and cosmology. Book: INTRO TO MODERN ASTROPHYSICS- Carrol What should I review over break...