Exam Definition and 886 Threads

In both my Maths and Physics exams they give these equations of motion: v = u + at v2 = u2 + 2as s = ut + (1/2)at2 s = (u+v/2)t However the following equation is never included (even though it can simplify some problems significantly) s = vt - (1/2)at2 Why is this deliberately...

Homework Statement No attempt done, just looking for any books or online sites that could help in solving these. They're likely to come up in my exam and am studying for other exams at the min.

1. While driving on the highway at a constant speed v0, significantly above the speed limit, you pass in front of a parked police car without noticing it. After a few seconds, during which time you have moved a distance d, the police car starts chasing you with a constant acceleration a0. Give...

1. Two cars, an Acura and a Bentley, are initially at rest a distance L from each other. At time t = 0 both cars starts accelerating toward each other, with constant acceleration Aa amd Ab respectively, until they crash into each other. a) At what time does the crash happen? b) Find the...

I'm working on a unlimited time final exam. There is a problem that I have been thinking about for the last three days but I still couldn't get it. It is worth about 15% of the final and the final is 35% of my grade. I could work on the final for another 5 days before I turn it in. Now the...

This is a question from an old test that I took this semester. My grader did not input anything, so I am left to trying to figure out by myself if my answers are correct or not. Question: The motion of an airplane leaving from miami can be described using a cartesian coordinate system with...

Homework Statement The space shuttle makes 1 revolution around the Earth in 1.5 hours when it is in an orbit 200 km above the Earth’s surface. The radius of the Earth Re is 6.5 × 10^6m. If the shuttle moves to a new orbit such that it makes 1 revolution per day (24 hours), what is the radius...

Homework Statement All variables etc are shown in the question attached pictuerHomework Equations I have attached the question as in picture format The Attempt at a Solution please check the attempt i made at the question shown in separate picture attached and tell me please if its wrong or...

Okay so I have a parallel-plate capactior k=5.5 Area= .034m^2 Plate Separation= 2mm If the Electric Field falls short, the capacitor will burn up if exceeding 200kN/C. It's asking for the max energy stored by the capacitor. My attempt was lame. I tried using C= (ε0)A/d and...

Homework Statement Let f(x) = sinh(x) and let g be the inverse function of f. Using inverse function theorem, obtain g'(y) explicitly, a formula in y. Okay the Inverse function Theorem says (f^-1)'(y) = 1/(f'(x)) If f is continuous on [a, b} and differentiable with f'(x)\neq0 for all x\in[a...

Homework Statement A police car at rest is passed by a speeding car moving east at 20m/s. The police officer immediately starts to accelerate to the east at 5.0m/s. How long will it take the police officer to catch up with the offending car Homework Equations The Attempt at a...

Hi everyone. I'm in crisis mode over this take-home exam I have due in 12 hours. I've posted the 4 problems I'm stuck on and ANY help would be a life-saver. I can get all of them setup, but am completely clueless as to how to actually execute them. I have a few questions in specific...

Hi, I want tp prepare to GRE Exam in physics, please give me some titles to male sure that i will get score over able me to continue at Stanford, Cornell..

These are potential proofs for the discrete math exam on Tuesday. I haven't been able to find proofs online. I have senioritis, and I'm graduating in a few weeks. Is a proof by contraposition the best way to prove this? If you assume h is not a function or g is not a function, then that would...

I know this is just a piece of whining, but I feel awful about it and want other's opinions. It wouldn't really bother if I didn't think I'm OK in physics. In a question I had to calculate potential energy and naturally wrote the answer down as joules. However, when I came back to check the...

This link (http://www.collegeboard.com/student/testing/ap/economics_micro/samp.html?micro has a list of released Microeconomics AP free-response questions. I have a question concerning the 2011 primary released exam. See the questions here...

Homework Statement If f(x) = x^3, show that f(a,b,c) = a+b+c Homework Equations I have given exam last week. and i am still searching for this question .. what this is about. is it from Tensor coordinate transformation or some numerical analysis involve here. kindly somebody...

Homework Statement I am having problem calculating this question. I even looked at the answer sheet and worked back, which gave me some luck, but still do not fully grasp the question.(i) Calculate the weight W of the workman. Homework Equations moment clockwise = moment anticlockwise...

A Question from Em on Yahoo answers: Please can someone help with this question from a Higher Prelim paper? [A knowledge of how to change log bases is not a requirement of the syllabus.]7(a) Given that log_4(x)=P, show that log_16(x) =1/2P (b) Solve log_3(x)+log_9(x)=12

Hello, I graduated in spring 2010, and I am beginning study for the Oct 2012 FE / EIT exam (long wait, I know ...) . I was wondering if anyone else has taken it after being out of school about two years, and what you did to efficiently structure / make use of your time for studying for...

Find an equation of the plane containing the two lines? The lines are: (x - 2) / -3 = (y + 1) / 2 = (z - 3) / 1 and (x - 8) / -1 = (y + 5) / -2 = (z -1) / 4

Homework Statement 1. True or False: If the rank of a 9x10 matrix A is 5, then the kernel of A is 4-dimensionalHomework Equations The Attempt at a Solution 1. I was explained that it is true because the rank and nullity of A must be 10, but I don't understand why. I understand the dimension...

Please Help! Physics I Midterm Exam in 2 days! 1. A car travels 95 km to the north at 70.0 km/h, then turns around and travels 21.9 km at 80.0 km/h. What is the difference between the average speed and the average velocity on this trip? Answer 27 km/h. 2. How many nanoseconds does it take...

Homework Statement A fiendish physics instructor devises the following exercise for students as a pass/fail final exam for their heat course. A 110 g cube of ice (5 cm on a side) is placed in a form fitting Styrofoam box that is 2 mm thick. The ice cube and the inside of the box are at a...

I am very much interested in Physics and Mathematics. I want some rigorous hard or tough competitions exam. I live in India so I want international exams and can be recognize everywhere in the world. The Exam should be International and I am doing by graduation currently. I want to...

"For the router to support the new address space it is necessary that the latest software release be installed." I said Q: The latest software released be installed R: The router to support the new address space. I interpreted this as Q is necessary for R, therefore R => Q. The professor has...

Hey, i have a Thermo exam tomorrow, and I've been working through the textbook examples and problems, and i was wondering if anyone here had some helpful problems for me to work out or any general hints or anything. Our textbook is the 7th edition of moran shaprio thermo and the exam is...

Homework Statement A proton is moving with an initial velocity of 6.28x10^5 m/s straight towards a large conducting sphere of radius 85.2 cm. The sphere has a charge of 4.83 μC on it. Protons have a mass of 1.69x10^-27 kg. a) Determine how close the proton can come to the surface of the...

Hello; I'm a electrical engineering senior and was wondering if passing the F.E. exam would help in the job market. Since I know it is usually catered toward Mechanical engineering and is requirement for Civil engineers, I'm not sure if it would actually state anything for an emerging...

hello all! I am new to this forum. I am doing Mechanic of Solid ( summer course). I have come across with this problem , but I don't know how to solve it. I have attached the question. Could anyone help me? I don't know how to convert from density to force. in this questions given are...

Today I totally bombed my physics (Mock college entrance) exam. I mis read questions, pressed the wrong button on the calculator etc.. This has always happened to me. Whenever I do an exam I both figuratively and literally crumble to pieces. (dry skin) Does anyone have any tips for...

Homework Statement Three charges are placed along a meter stick. One charge, q1, is placed at the 12.1cm mark. A second charge, q2, is placed at the 27.2cm mark. The third charge, q3, is placed at the 48.5cm mark. Charge q1 is equal to +171μC. What must be the sign and magnitude of charge q3...

This is not about cramming the night before. This is about continuing to study something you have been reading for weeks, in one final night of "preparation" before an exam. I honestly think it does me much more harm than good. Does anyone agree? I feel like if I get a good night's...

Homework Statement Find the period of small oscillations of a water pogo, which is a stick of mass m in the shape of a box (a rectangular parallelepiped.) The stick has a length L, a width w and a height h and is bobbing up and down in water of density ρ. Assume that the water pogo is...

Hi, I've been debating with myself if I should pass out of calculus 2 by an exam or I should take the full semester. I am currently taking calc 1 this semester. Is there a pro or a con to either of these routes? I also would need to brush up on certain calc 2 topics since I have not taken...

I have heard a story from one of my professors that Maxwell had failed the first two questions of his qualifying exam, and as a last chance, they gave him a take-home assignment. Maxwell returned with the Maxwell-Boltzmann distribution of velocities. Can anyone verify also hearing a similar...

I'm taking a combinatorics course this semester (from the math department), and my professor said the exams are usually devised so that the average score is a 60%, and then they're curved. I've seen this method of exam development with other professors, so I wanted to get some input to help...

HELP! Semester Exam on Monday! Homework Statement A missile is fired horizontally from an aircraft carrier in the ocean. Assuming the missile was shot from a height of 50m and a horizontal velocity of 200m/s... a. How long is it in the air? b. How far away will the missile land...

exam in 1 week and I know ziltch! please help. I need some really good guidance here Guys, I have an exam in 1 week and I am really bad at physics. My lecturer told the class to focus on: Forces and vectors moments friction inclined plains pin jointed frames. I know nothing about...

Homework Statement A full bowl cointains water, its mass is 395g.An iron screw is placed on the bowl and the mass is now 565g. This seemed simple, but I asked my teacher to clarify and he said that upon placing the screw on the water an equal volume of water is removed so the volume remains...

http://www.nzqa.govt.nz/nqfdocs/ncea-resource/exams/2011/90523-exm-2011.pdf can some 1 help me solve the following questio from here 1a,b 2a,b,d 3a,b,c http://www.nzqa.govt.nz/nqfdocs/ncea-resource/exams/2011/90521-exm-2011.pdf also help me solve question from here 1c 2bii 3...

An astronaut on the moon wishes to calculate the local g in the area. He sets up a wire with a mass of 1.7 grams and hanging from it an object with mass 4.98 kg. He sends some kind of pulse down the wire and calculates that it takes 40.86 ms to traverse the wire. What is g. You can neglect...

Homework Statement This is one of the three linear algebra scholarship questions given by my university last year. I've solved the other two, but this one is posing a bit of a problem. Question 1 on the file. Given that for a nxn matrix A both matricies A and A-1 have integer entries...

Hello guys, I have a physics midterm coming up on 11/29, and I am studying all day, everyday during this thanksgiving break. The reason why I am studying so hard is because I have never taken physics in high school, and now in freshman year of college, I am struggling with General Physics...

So this isn't really HW help, but I was just looking for general help for my next exam as to how to set up problems. The topics for the next exam are Forces and motion, kinetic energy and work, and potential energy and conservation of energy. The exam consist of 7 questions to which we have to...

Hey everyone, I'm trying to get prepped from my EE Professional Engineering exam and there is a question that I cannot solve in the prep-guide. I'm hoping that someone might be able to help because it can be solved in MatLab (as noted in the book). Here is the problem description: You are an...

[SIZE="6"]115.4% lolwtf Thanks, people of pf, for helping me to understand the material!

Homework Statement Theorem: Given a metric space \left(X,d\right), the set of all limit points of a subset E\subset X, denoted E' is a closed set. I have an Analysis Exam tomorrow and have been studying for quite awhile and last week, my professor gave us a list of Theorems to know the proofs...

Homework Statement I just took the test, but I can't remember the question word for word, it was along these lines though: You are standing on bus. It suddenly brakes what is the force that makes you lean forward? A: Kinetic friction of your shoes on the bus floor B: Static friction of your...

From: http://online.wsj.com/article/SB10001424052970204644504576653004073453880.html": October 26, 2011 Highlights from the article: Chiefly, testing yourself repeatedly before an exam teaches the brain to retrieve and apply knowledge from memory. Practice tests also help with...