Exam Definition and 920 Threads

Basically there are 2 equations ; x+2y+3z = 1 2x+4y+6z=2 I put them into a matrix and row reduce to get 1 2 3 | 1 0 0 0 | 0 so we can say x = 1 - 2y -3z and let y and z = 0 to get a solution is (1,0,0) Now i need to find the nullspace to find the whole solution set; so x +...

Homework Statement Hi! I'm preparing on some previous exam questions for a computer vision related course. Here are some questions I'm struggling with. 1. A general form of nonlinear diffusion scheme of an image I(r) can be represented as a Partial Differential Equation...

Homework Statement Hey, This is a question from a sample exam we are given for our engineering maths exam. Firstly given that the Fourier series contains only "sin(x)" doesn't this mean that it is an "odd" function? Can the period be calculated from the given function easily? Secondly is...

Homework Statement http://physics.ku.edu.kw/LectureNotes/TheoryCourses/PHYS102/ExamPapers/y1011-2-md2.pdf so i just did this exam and they gave us model solutions and I don't agree with conceptual question number 1 the answer should be 2 because it isn't connected to battery therefore...

Hi, this is my first post. I did a quick search and didn't see anything relevant. I finish my B.S.E.E. in August. Would it be wise for me to take the FE/EIT (Fundamentals of Engineering / Engineer in Training) exam before then? I have received some conflicting answers to this question. It...

You have a circular capacitor (radius = R). Find the magnetic field from the central axis, for r > R? I have solved the first one for r<R by using ampere's law: /B dr = my(I + d/dt(flux of electric field)) the answer is hard to write in a post like this, but I will do if necessary...

Homework Statement This relates to using Lamé equations to find the stresses on a thick cylinder, but there are problems with our notes and the exam is on Monday. For an exam question, the formula I've been given is that sigma r (radial stress) = a + b/r^2, but in the notes...

hello to everyone, WHO CAN HELP ME!? i have an exam tomorrow in morning, and i need an solution of a math problem now, if can some one help me with the solution The Problem is : 8. Geometric progression is given to four members. If the members of this progression were added...

Homework Statement I'm doing a review for a Mechanics exam I have tomorrow and this first problem given on the review struck me as odd. Problem Statement: An 89kg boat that is 6.6m in length is initially 7.1 m from the pier. A 27 kg child stands at the end of the boat closest to the pier...

I'm having a really hard time solving these word problems. ANY info on how to get the pictures drawn, which sides or angles to solve for, and instructions on how to solve would be greatly appreciated! 1. A tv antenna on top of a house is 4.50 ft tall. From a point on level ground the angles of...

well i have an exam on mon so i ahve been practicing I am not very sure how to do this qn . this seems easy but i want to make sure any help would be greatly appecitated .ITs a pcture[PLAIN]http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/216457_217324648278600_100000032007600_930824_4465603_n.jpg

Homework Statement Which of the following statements about conductors under electrostatic conditions is true? (A) Positive work is required to move a positive charge over the surface of a conductor. (B) Charge that is placed on the surface of a conductor always spreads evenly over the...

compute the limit lim as x,y --> (0,0) of (x+y)*ln(x2+y2) i would use polar coordinates if (x+y) was (x^2+y^2) but that not being the case is messing with me. and than another one is the same parameters, but of (x^2*y)/(x^4+y^2). for this one i attempted to do the partial deriv of both x...

I've just finished some past exam papers and when marking them using the mark scheme something confused me a little One question said when a fire engine moves away from an observer, the pitch of the siren decreased, why and I chose the wavelength of the sound wave decreases The mark scheme...

The graph of the function f, consisting of three line segments, is given below(#5) "[URL Number 5, collegeboard website[/URL] a)compute g(4) and g(-2) I have no idea how they got to that solution. I have been looking at it for a long time and still do not understand! Please help!

Hello, I am currently studying previous AP Calculus AB exams and I was wondering if someone could explain how to solve the following as clearly as possible so I have a better understanding of these problems in hope to prepare my for the exam next month. R is the shaded region in the Figure in...

I just wrote an exam in Algebra II, and one of our true or false questions got me thinking. Does every field have a subfield which is isomorphic to the Q or Z mod p? I put it as true, for the wrong reasons, vaguely remembering a similar statement about integral domains and mixing it up. So...

This is a multiple choice question supplied by the AP Chemistry Course Description, available at apcentral-dot-collegeboard-dot-com. I'm not sure what you are supposed to know to answer it. http://apcentral.collegeboard.com/apc/public/repository/ap-chemistry-course-description.pdf...

So before I graduated with my BS in Civil Engineering I took the FE exam in Arizona and passed it. I then went out of state for my Masters in Civil Engineering. I am getting close to graduating and am looking to get a job. Do I need to retake the FE exam if I work outside of Arizona...

We had our final exam in Analytic Geometry. It was hard. I hardly answered the last problem. One of my classmates is a student assistant of our instructor. She had assisted in the checking of our papers this morning. It was hilarious because, according to my classmate, even our professor...

Hello everyone, I'm in a hectic exam schedule at the moment and I have my biochem spot exam in 5 days time. I spend much time studying for theory and MCQ so I'm really crammed for this. I'll post various questions here, if you can help me. They are mostly common sense ones, but I'm not very...

Does anyone have the skinny on this exam? Apparently you have to have a mastery mechanics, dynamics, and calc. From what I've heard, the test is ridiculously hard, and students that have been getting 4.0's at their college routinely bomb this exam. Does anyone have any info as to how to...

I was wondering if anyone had any tips, on studying for a statics exam. The only problem I have is that, I understand how to do it, but i become anxious and loose my train of though. I tend to rush into the problem instead of breaking it down into its simplest parts. Tips or links on how...

Does anyone know where I can get the answers to the past exams? I'm specifically looking for 1984 and 1988. Thanks

Hey All, I hope this is in the right sub-forum. As the title states, I've failed my first exam in Linear Algebra, and I'm thus in a bind. I just need some advice on how to make a come-back, as I'd honestly like to earn an A or B in the class, as it's a retake. My professor does drop an exam...

These are not homework questions. Review for the test rather; I was wondering if I could get answers or links to any info regarding this set of questions. Thanks in advance. 1) What equation governs the regular time evolution of the wave function? Are there other ways a wave function can...

I don't know why, but before exams I get nervous and the night before while I slept, I was "awake" My hand was literally shaking this morning and I ended up making some oversights on my exam today (I can feel it...) I already try those "breath in" techniques and such, but none of them is...

What is the difficulty level of the CMI entrance exam?Is it tougher than IIT JEE?I am in std. 11 and I want to take up BSc Physics at UG level.Can one get through the exam by having a grip over the basic concepts of physics or does it require rigorous preparation like the IIT JEE(joining...

Hi, I study in Asia. I am isolated by the physics society in my college. Its because i go out of the lecture room immediately to library to study. I eat alone all over my college life. No friends at all. Sad thing is the physics society keep the pastpaper secret and not let me take a look...

Homework Statement Anybody know any good websites or notes for review for the AP Cal AB or BC exam? I know sparknotes have some good notes as well as course notes. - Thanks

Homework Statement Suppose \phi : V \to W is a linear transformation over a field \mathbb{K} . (a) (i) Define the kernel of \phi, \; Ker(\phi). [2 marks] (ii) Show that \phi is 1-1 if and only if Ker ( \phi )=\{\bf{0}\}. [4 marks] (b) Suppose X is a subspace of W. Define the set...

Homework Statement http://www.aapt.org/physicsteam/2010/upload/2010_FmaSolutions.pdf #25Homework Equations \taunet = 0 \Rightarrow Lo = L Conservation of Mechanical Energy The Attempt at a Solution I started by writing two equations: one for conservation of angular momentum and one for...

Hi, How to prepare to the GRE exam? and, how to get high score?

In our course covering some parts of Sakurai's Modern Quantum Mechanics we have a special exam. We must present a topic from the book not covered in class to our professor in half an hour. I'm not that familiar with the book yet, because I've had many project due this semester. So I'm uneasy...

Homework Statement A car has an engine which delivers a constant power. It accelerates from rest at time t = 0, and at t = t0 its acceleration is a0. What is its acceleration at t = 2t0? Ignore energy loss due to friction. Homework Equations P=W/t, W=Fd, F=ma The Attempt at a...

hey everyone .. I've been working on some old exam problems .. i couldn't figure these out :( A 40-g bullet, with a horizontal velocity of 500 m/s, comes to a stop 20 cm within a solid wall. What is the magnitude of the force from the wall stopping it? (Assume this force to be constant) (Ans...

[PLAIN]http://img811.imageshack.us/img811/3199/trainv.jpg I have to find how long it takes the ball to travel the distance of the train in the ground frame. In the train's frame, it is L0/u0. Is the answer in the ground's frame simply (L0/u0)/(1-v2/c2)^(1/2)?

Just FYI, this is not a homework question. I am working on a practice problem for my final exam and I decided to post it here since I think it would get more attention than in any other section. Homework Statement Given an unbranched polymer with N links (that can be oriented in any...

Homework Statement A single runaway train engine with a mass of 10 000kg is traveling at 15 m/s. The runaway engine collides and joins with a stationary carriage of 5000kg, which as not had brakes applied. After an impact of 0.5s, the engine and carriage then continue along the track as one...

Hello All, I am studying for my introductory astronomy exam and I came about these two question; Galileo discovered a) radioactivity b) some moons of saturn c) 2 moon of Mars d) some moons of Jupiter e) the telescope I know he discovered 4 moons of Jupiter but "some" is a bit...

Please Help Have exam tomorrow! waves A jet is flying horizontally, as the drawing shows. When the plane is directly overhead at B, a person on the ground hears the sound coming from A in the drawing. The average temperature of the air is 20 °C. If the speed of the plane at A is 164 m/s, what...

Only one in the class, not to brag, just happy that I did well. It was simple stuff, combing polynomials, finding area of polygons, linear equations .

Hello, I have a chemistry exam this coming friday and have lots of material to cover ( around 140pg), i was wondering if its better to read the book or do the practice exams which are provided? As of the moment, 1 chapter takes about 4 hours( if not longer) and I have to go through 6 of them...

It's my last physics I exam before the final, and I don't think I prepared enough for it. I did study about 12 hours in the past 24 hours, and I have covered a great amount of material. I think the class goes too slowly for me, and I just get behind because I work better at a faster pace...

Do these two answers contradict each other: Q1) Four students are discussing a circuit. The circuit is in series and contains a lamp, an ammeter and a 10V battery. Andy: the current in the lamp consists of negative charges moving from the negative batter terminal towards the positive...

Real Analysis Exam Questions. Please Help! I'm taking this course on real analysis and my exam will be in less than a week from now :eek: These are exam questions from previous year which have been assigned as homework, and I just started studying and it's really hard. I would be sooo happy if...

Due to schedule conflicts, I was not able to take AP Physics B this year (my senior year). I am taking honors physics, but as you would guess, it is no where near the caliber of AP Physics. I bought the Princeton Review for AP Physics B, as suggested by the teacher. Besides working through...

breaking from the mold... I received my midterm exam back today for electronics I. While I did set the curve, I still performed extremely poor. I wonder if some curious minds could look at my performance and shed some light on some of the critical mistakes that I made... [please see...

Homework Statement A dielectric material has the following properties: electrical conductivity \sigma = 0 relative permittivity \epsilon_r = 3 relative permeability \mu_r =1 The electric field in the dielectric is given by \mathbf{E} = E_0 cos(kz-\omega t)\hat{x} There are no time...

Hello guys. I was wondering if you guys could give me your opinion/advice for the following scenario: Yesterday I wrote my first midterm in statics (1st year engineering), which is worth 30% of the final mark. The written part of this exam, worth half of the entire midterm, consisted in a...