Threads Tagged with contradiction Thread / Thread Starter Last Post Replies Views If the abs(a+b) = abs(a) + abs(b), so the abs(z) = abs(x+iy) = abs(x) + abs(iy) = abs(x) + i abs(y). However, the... Feb16-14 11:37 AM Mark44 2 232 General Math If we apply the small angle approximation so that a simple pendulum can be considered to be under going SHM, what kind... Feb9-14 06:34 AM sophiecentaur 13 302 General Physics 1. The problem statement, all variables and given/known data I'm trying to show that if ##a \approx 1##, then $$-1... Jan10-14 06:35 PM tomwilliam2 6 291 Precalculus Mathematics Homework I think the title is self-explanatory. The first theorem states that gravitational forces (1/r potentials in general)... Dec20-13 02:53 AM mathnerd15 8 1,462 Classical Physics 1. The problem statement, all variables and given/known data My question basically wants me to write the direct... Nov23-13 06:47 PM Silversonic 0 228 Calculus & Beyond Homework following is what little I know about energy:Energy: its the ability to do the work. First law says you cannot... Nov12-13 05:13 PM sophiecentaur 6 865 General Physics Prove by contradiction that a real number that is less than every positive real number cannot be positive having... Sep29-13 11:23 PM berkeman 5 466 Precalculus Mathematics Homework 1. The problem statement, all variables and given/known data Hello Guys, can you check my proof. Problem... Sep15-13 04:50 AM CAF123 13 358 Calculus & Beyond Homework According to my prof, increasing intensity of the light source in a photocell for the photoelectric effect does not... Sep9-13 02:29 PM dauto 2 459 General Physics We know that the rate at which electrical work is done (electrical power) is defined as: P = I2*R , or: P =... Aug20-13 04:06 AM FredericChopin 3 394 Classical Physics Hi guys, lets say we have a wave where the power P is proportionate to the square of its amplitude, which is A^2. If... Aug9-13 07:08 AM Simon Bridge 3 410 Introductory Physics Homework To solve a 2nd order ODE, we can follow the steps as shown below. (Image 2 is a continuation from Image 1, apologies... Aug6-13 12:57 PM tade 2 505 Differential Equations 1. The problem statement, all variables and given/known data If ##n = 2k## is even and ##n \ge 4##, show that ##z =... Jul14-13 07:53 PM micromass 1 364 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data The potential at a point is 20 V. Calculate the work... Apr28-13 06:16 AM haruspex 6 308 Introductory Physics Homework I was reading here http://www.physicsforums.com/library.php?do=view_item&itemid=294 gauss law's for magnetism says... Apr17-13 05:53 PM vanhees71 3 628 Classical Physics 1. The problem statement, all variables and given/known data Please check that the proof is correct or not. Let ℝ+... Apr15-13 07:24 AM yy205001 4 427 Precalculus Mathematics Homework 1. The problem statement, all variables and given/known data Prove that if x^2 + y = 13 and y \neq 4 , then x... Mar24-13 12:50 AM Cole A. 3 416 Calculus & Beyond Homework Well, this question may seem elementary to you but I simply do not have a background for it. Now the question: Sun... Mar19-13 10:25 AM jlefevre76 11 940 Classical Physics So for the phase velocity of a massive particle we have Vph = Vg/2 for non-relativistic case Vph = c^2/Vg for... Mar7-13 05:15 AM Bill_K 1 561 Quantum Physics 1. The problem statement, all variables and given/known data Is the set$$ \{cos(x), cos(2x)\}  linearly... Feb10-13 01:14 AM mef51 1 385 Calculus & Beyond Homework I'm reading through a text's proof on proof by contradiction. But it makes inexplicable jumps and doesn't appear to... Jan20-13 09:07 PM Klungo 5 975 General Math I've just started studying college math. I read the proof by contradiction is based on the law of excluded middle.... Nov3-12 04:10 PM Bacle2 1 615 Set Theory, Logic, Probability, Statistics 1. The problem statement, all variables and given/known data Two equal, parallel and opposite forces at at both sides... Oct30-12 05:55 AM tiny-tim 7 893 Introductory Physics Homework 1. The problem statement, all variables and given/known data Prove that for any integer n n^2+n+1, can never be a... Sep10-12 06:18 AM haxan7 5 800 Engineering, Comp Sci, & Technology Homework 1. The problem statement, all variables and given/known data Prove by Contradiction: For all integers x greater than... Aug7-12 02:19 AM Millennial 2 621 Precalculus Mathematics Homework Le Chatlier's Principle is used to determine the direction of a reaciton based upon a stress put on the system. In... Aug2-12 05:21 PM johnny_b_good 3 698 Chemistry 1. The problem statement, all variables and given/known data Prove by Contradiction: For all Prime Numbers a, b, and... Aug1-12 12:25 PM HallsofIvy 1 973 Precalculus Mathematics Homework Say I have a statement like this: P implies (Q1 and Q2). If I wanted to prove this by contradiction, I would... Jul19-12 09:11 PM jbriggs444 3 932 General Math I came across this when doing another problem: Suppose we have 2 numbers, (a+b) and (c+d), which both equal 0. ... Jul12-12 12:26 AM Mentallic 3 584 General Math So, I was thinking a lot about different ways to order the irrationals. Most of them had to do with... Jul11-12 05:45 PM middleCmusic 11 1,856 Linear & Abstract Algebra Let x,y,z be integers satisfying a specific condition, which boils down to 5|(x+y-z) and... Jul8-12 01:32 AM haruspex 1 1,254 Linear & Abstract Algebra I posted this in the number theory forum to no success... so I figured maybe the homework help people would have some... Jul7-12 09:19 AM Yukoel 1 522 Calculus & Beyond Homework It seems to me (though I would be *extremely* glad to be proven wrong here) that in mathematics we often blindly... May30-12 07:06 PM Tac-Tics 15 2,363 General Math Can anyone provide an explanation for this claimed contradiction between basic electromagnetism and momentum... May3-12 06:06 PM Vanadium 50 1 1,137 Special & General Relativity 1. The problem statement, all variables and given/known data Suppose I want to prove the following statement by... Apr13-12 02:30 PM cris(c) 6 916 Precalculus Mathematics Homework Suppose we have two objects and we're only talking about rectilinear motion. Initially, one object has mass m and is... Mar19-12 02:27 AM zhangyang 9 1,642 Classical Physics My textbook (Halliday & Walker) explains that a charged conductor (a solid, of an arbitrary shape) in electrostatic... Mar8-12 04:53 AM Hassan2 17 2,272 Classical Physics I never understand the proof by contradiction, because somewhere in the middle I always lost myself. In this... Feb18-12 10:46 AM alan2 1 1,197 General Math Hi, I have a question about proofs by contradiction in general. Without getting into the mathematical details, suppose... Feb18-12 08:27 AM HmBe 2 600 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data If a,b and c are integers and a2+b2=c2, then at least... Feb12-12 11:12 PM Dick 6 901 Calculus & Beyond Homework