Exam Definition and 920 Threads

PDF: http://www.aapt.org/physicsteam/2014/upload/exam1-2014-2-2-answers.pdf Homework Statement A disk of moment of inertia I, mass M, and radius R has a cord wrapped around it tightly as shown in the diagram. The disk is free to slide on its side as shown in the top down view. A constant...

Homework Statement I'm having trouble with this problem attached. Any help would be appreciated. Homework Equations The Attempt at a Solution

[b]1. Given a 6x5 array of unique elements, how many ways can three elements be selected so that no two are in the same row or column? [b]2. Fundamental Counting Principle? [b]3. This question was a sample question in the Actuary P1 exam prep I am reviewing. I thought it would be...

John likes to play baseball with his friends in the local playing fields. Last week John hit his best shot ever. The trajectory of the baseball after he hit it can be modeled by the quadratic equation y= -x2/40 + 31x/ 40 + 4/5 where y represents the height in metres of the baseball above the...

Its my 3rd try at an exam in graduate school. I failed it the 3rd time and now have a last attempt remaining,but this attempt would be a one-on-one viva exam session(oral exam). I don't want to justify how hard I worked because the end result is that I failed. What I would like to ask is about...

Okay if a/b then doesn't a/nb for any integer n?

I got the exam results for one of my most favourite subjects today-Dynamics of Machines,and it was horrible. Luckily I just managed to scrape through. In my university(German one),getting a very good grade is tougher than the University in my home town. I feel devastated because it was a oral...

Hi! I'm set to take an entrance exam to a university I've applied to next week, so I was looking through some sample questions today and I came across one question I didn't quite understand... The questions have no answers which make it even more confusing. Here is the question in its entirety...

Unfortunately there's no link to the test. This is from the test administered a month ago. Homework Statement A choppah is flying horizontally at constant speed. A perfectly flexible uniform cable is suspended beneath the choppah; air friction on the cable is NOT negligible. Which of...

http://www.aapt.org/physicsteam/2012/upload/exam1-2011-1-3-answers_1.pdf Homework Statement You are given a large collection of identical heavy balls and lightweight rods. When two balls are placed at the ends of one rod and interact through their mutual gravitational attraction (as is...

http://www.aapt.org/physicsteam/2010/upload/2009_F-maSolutions.pdf Homework Statement Two discs are mounted on thin, lightweight rods oriented through their centers and normal to the discs.These axles are constrained to be vertical at all times, and the discs can pivot frictionlessly on...

http://www.aapt.org/physicsteam/2010/upload/2009_F-maSolutions.pdf Homework Statement Two identical objects of mass m are placed at either end of a spring of spring constant k and the whole system is placed on a horizontal frictionless surface. At what angular frequency ω does the system...

http://www.aapt.org/Programs/contest...08_fnet_ma.pdf Homework Statement A uniform circular ring of radius R is fixed in place. A particle is placed on the axis of the ring at a distance much greater than R and allowed to fall towards the ring under the influence of the ring’s gravity. The...

Homework Statement Late correction, this is the 2008 F=ma exam: http://www.aapt.org/Programs/contests/upload/olympiad_2008_fnet_ma.pdf A mass is attached to the wall by a spring of constant k. When the spring is at its natural length, the mass is given a certain initial velocity, resulting in...

Homework Statement Four masses m are arranged at the vertices of a tetrahedron of side length a. What is the gravitational potential energy of this arrangement? Homework Equations U = -Gm2 / r The Attempt at a Solution The potential energy is the negative of the work done by gravity in...

I have thomas calculus 12th edition, I like it, I study and understand calculus, but i need somebody to recommend problems for me that will help me understand and will introduce different ideas to me, I can't solve all the problems in the book, please advise! thx

Homework Statement A simplified model of a bicycle of mass M has two tires that each comes into contact with the ground at a point. The wheelbase of this bicycle (the distance between the points of contact with the ground) is w, and the center of mass of the bicycle is located midway between...

Does anyone know a good website where there are practice questions for complex circuits. I'm preparing for an exam, and can't seem to find any? The ones I found are all very similar and not really a challenge or either don't have the answer so I don't know If I did it right.

How to stop getting ahead of oneself during exam preparation? I have my final semester exams coming-up for my masters course.I sometimes start to day-dream about what my life would be like after I ''passed'' the exams. I try and control the thoughts whenever I can but it pops-up at some...

ive been revising all holidays, unfortunately I've just realized I've been finding eigenvalues using the ensemble when i may have to change basis for the exam. looks at homework questions, workshop questions... nothing! anyway an example problem: rewrite |PSI> = a|0> + b|1> in the...

About what percentage do you need to score a 5 on the AP Calculus BC exam this May?

Hi. Tomorrow I am taking the ACS General Chem 1 exam as a final. It's supposed to be 40 questions but I heard it is incredibly difficult. I currently have a 95% in my class and need to get at least 24 out of 40 to get an A for the semester. The problem is that my class was so easy (we got to use...

I need help in below matter. During the classes on my college we used this type of testing stand with force gauges : http://www.qualityforcegauges.com/force-gauges/ Unfortunately the exam is coming in strides and I still don’t know how to measure the vibration frequency. So I’d like to ask you...

Hey, I am taking the FE exam next year and need advice on the discipline to take it in. I am majoring in chemical engineering and would like to make a career in the Environmental engineering side. Will taking the FE exam in a specific discipline hinder my career prospects? Also, is the general...

Homework Statement Homework Equations See Image The Attempt at a Solution I am confused where to start this problem. Obviously i need to get at the DC load line for Q1. But the problem is that I was taught in class that the DC load lines intercepts for a transistor are...

Homework Statement I tried to solve for the force vectors but I had no clue how to do it? I tried plenty of times after the exam and still haven't found the components. Help?Homework Equations F\bullet\Deltar The Attempt at a Solution

I'm ok with this question up until a3, I have no idea how to get velocity as a function of time from the information available. This question is taken from the Oxford Physics entrance exam. I'm not sure if it's a miss-print, perhaps the questions should be as a function of x, because that seems...

Hey guys. I am not sure if thread abides by the rules, I understand we're a mathhelpboard so feel free to remove the thread if it violates anything. I am looking for practice exams with solutions in preparation for an upcoming end of semester exam in 30 days and was hoping someone could help me...

Hello Forum, I'm a first year graduate student in a Master's in electrical engineering program. I am currently taking several graduate courses in different fields so that I may make the very important decision of what to focus on in my later coursework. I would like to ask those of you with...

Homework Statement Homework Equations The Attempt at a Solution My instructor gave us some sample problems he said might be on the exam, I tried working them out but I was having difficulty with 3 of them: For the 1st problem, when there is positive value for voltage, I got...

I am a junior in high school who hasn't been exposed to any Physics class. I plan to take the exam the next school year since the exam is said to be very difficult. I really want to get a 5! Like I said, I will be self-studying for this exam as much as I need too, but I first need to read over...

1. The question The following message was originally transmitted with odd parity in each short bit string. In which strings have errors definitely occurred? 11001 11011 10110 00000 11111 10001 10101 00100 01110 2. The attempt at a solution It says that it is transmitted with odd...

Homework Statement Information in condensed form: => Student takes 20 questions true or false exam. => He knows answer to 10 questions. => He guesses on 10 questions. => Professor randomly picks two questions out of 20, and finds student answered them both correctly. Task: Find...

Hello, How do i prepare for the F=ma exam? I have taken honors physics, but can only score about 5 on it :( i am taking AP Physics C this year however. Also, does anyone know where to find old practice tests, with FULL SOLUTIONS (not answer key--Solutions!)? THanks.

Hey guys, I am going to have an exam in physics in like 3-4 months because I failed my first exam. I was wondering if it is possible to go from have failed to an A in physics in 3-4 months (talking about the hardest physics possible to take at high school). The reason I failed is not because I...

This is a question I gave in one of my exams. :D If $I$ is an ideal of the commutative ring $A$ (with unity), then prove that for each ideal $\overline J$ of the quotient ring $A/I$, exists an ideal $J$ of $A$ that contains the ideal $I$ and the lateral classes of $I$ defined by the elements of...

Hi, I was wondering if someone could check to see if this problem is correct. For part "e" I originally was dividing put changed to multiplying is that correct? Thanks in advance for the help. A researcher was interested in the type of coffee that coffee drinkers prefer. A random sample of...

Homework Statement Here is the stated problem: MSA computer corporation manufactures two computer system. Alpha 4 and Beta 5. The firm employs five technicians working 160 hours per month. Management insists on no overtime next month (less than or equal to 160 hours).20 hours labour is...

In an Engineering course I was used to being rewarded for proving a good understanding of theory. For example, if I explained a basis of the following solution, it would still give some rewards, even if the solution itself had major computing errors or even if it was partially mathematically...

Collision Question: (URGENT) Exam tomorrow Hi all, I have an exam on collision and projectile motion tomorrow, and was wondering if anyone could answer this question: I get an answer, but my friend gets a completely different answer. I was wondering if anyone could just clarify and show us the...

So, for our comprehensive exam (MS Physics) we need to answer 4 out of 7 problems. Here are the topics. 1. Fundamental Postulates of Quantum Mechanics 2. Wave Mechanics 3. Angular Momenta 4. Matrix Mechanics 5. Harmonic Oscillator 6. Atoms 7. Approximation Methods So, where do you...

Here is the problem: Let f be a real-valued function on the plane such that for every square ABCD in the plane, f(A) + f(B) + f(C) +f(D) = 0. Does it follow that f(P) = 0 for all points P in the plane? Below is my solution: Create a 3x3 set of boxes (where each box has equal...

2) I am unsure why the answer is A.. I thought the answer would be C ( by using flemings left hand rule) 5) If we resolve forces, we get R - mg = mv^2/r , so R = mg + mv^2/r but this isn't the correct answer.. (the correct answer is D) 6) I know when lines of flux are cut, an EMF and therefore...

Hello Aero Forum! I need to take the general GRE and was wondering if anyone had any suggestions as to which guide is best? I want to get as close to a 170 on the quant (don't we all!) as possible, so I was wondering where I can find questions closest to the actual exam. So far I have the...

A student I help has been given a set of questions to study for an upcoming exam, and has asked me to work the problems so that they can see the solutions worked out. I decided to post them here so that they may benefit others studying the same material. Here are some formulas to which I will...

Homework Statement (see attached) Homework Equations F=mv^2/r, Integral(F<dot>dl) The Attempt at a Solution the answer is B. Can anyone explain why?

Now that I'm finally getting the hang of some of these integration techniques with complex functions, I've come across another hole. In my game here. That comes with the concept of resolving the definite integral of these complex functions. What happens is that they fluctuate and so can...

Homework Statement Using Stoke’s theorem and the identities given, ∇x∇(Scalar)=0 deduce the relationship between electrostatic field E and potential ψ at a point in space, show that E = -∇ψ Homework Equations The Attempt at a Solution Does this question mean show a derivation...

So, I'm gearing up for a final exam her, and while I handled learning the integration of trig,log and exponential functions... Nowthat I've got a good grasp of all these rules I'm getting lost in the sheer vastness of what I need to be aware of... For example, how do you, in general...

I don't get it guys. 100% on all the quizes and homework. 42% on the final... Deptartment policy is that you have to get a 60% or above on the final to get a D no matter what your grade is. i understand integration by parts just fine, trig sub just fine, integration with trig functions...