Exam Definition and 886 Threads

Sorry I am new to the site and didnt follow the template, please don't delete this post, I need help with these problems. 1) A tightrope walker is practicing. She is balanced on a rope at the exact midpoint of the rope. The tension in the rope is 4000 N, and the mass of the tightrope walker...

Express as the product of disjoint cycles: a. (1,2,3)(4,5)(1,6,7,8,9)(1,5) b. (1,2)(1,2,3)(1,2) I know how to do in 2 row permutations, with right to - left. can anyone tell me , how to express it without transfer it into 2 row permutations. 2 disjoint product. eg. (123)(234)...

Hello everybody. Well, I failed my airframe structures exam in May, and now have to resit it. I have been attempting to do some exercises to get back into it, but it all looks foreign to me. I'm struggling A LOT, and another fail would mean that I have to resit the year (even though I...

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matura exam results wrong !? (probabiltity of shooting the target) Hello! I got one task that I seem to solved it correctly. But the matura exam results are different then my solution. Here is the task: There is one target which is divided on three concentric zones. Here is picture of it...

Need information about GRE subjective mathematics. can anyone help me in this regard

Not sure if this belongs here, and it probably doesn’t. I just wanted to let all you folks at Physics Forums that I recently found out that I passed the April 2009 FE exam (on my first try). I am a Senior Civil Engineering student at New Mexico State University. Also I would like to thank...

Homework Statement Incomplete combustion of C6H8, set up chart showing number of moles, molar mass and mass the propane is burned with 60% pure oxygen, the propane is collected over water at SATP Homework Equations n=m/M The Attempt at a Solution How do I find the mass and number...

As I advance in my studies (electrical and communications engineering) I find that there is an increasing conflict between exams and knowledge. Somehow, my subjects seem to be exam-oriented in a way. That is, the subject is taught through a set of problems, techniques and concepts in order for...

Homework Statement 2 balls fall from a given height. 1 ball is smaller than the other and the mass of the bigger ball is given. The larger ball is directly below the smaller ball when dropped and the separation is distance is negligible. When the larger ball hits the floor, the smaller ball...

Graduated with a BSME last year and have not had any luck finding work. I was wondering if it is possible to take the exam and have the license activated when I acquire the neccesary experience? I have also heard that in the state of Nevada, work experience is not required; does anyone know if...

I've been studying for our final exam throughout this weekend, and I realized that there is a lot that I don't remember. So, instead of asking each individual question, I'm going to try to ask one from each concept that I don't understand. Quite a few of them I have absolutely no idea how to...

Does anyone know where I can access past exam papers in the field of linear algebra. I am particularly looking for first year undergraduate exam questions on linear algebra.

Homework Statement A football team wants to have a 0,5 chance of scoring on at least 4 out of 5 penalties. What must be the probability p of scoring on each penalty? Homework Equations {n \choose k} \cdot p^k \cdot (1-p)^{n-k} The Attempt at a Solution Tried this: {5 \choose 4}...

Hello everyone, I have an exam in a few days and need help with a question on one of the past exam papers. An optical position encoder used on a robot axis has a 10:1 gear ratio, an optical disc with 72 slits, and a 12 bit binary counter. Determine: (i) The resolution of the encoder i.e...

just need 2 definitions without proof for an exam tomorrow, don't need to use them for anything just need to be able to quote them but can't find them anyway so if someone could helpfully write them down that would be great 1)simple graph 2)connected graph cheers

1. A Cyclist traveling at a speed of 4.2 ms^-1 accelerates at 1.1 ms^-2 in a time of 7.4 seconds. What is the distance travelled? 2. Homework Equations ? 3. The Attempt at a Solution : The answer is 61m but i don't know how to get that answer

Sorry I didn't know where else to post this. But I thought that test was way harder than any of the practice tests I've taken. The free response, at least.

I have an exam today, a final exam. Usually I don't ask this, but its an physics exam so I will need as much as help I could said. With that said, I was wondering if you had any specific tips on taking a physics exam? Like how to dissect a problem.

EXAM QUESTION black hole force?? Homework Statement good morning everyone! just getting some last minute studying in before my final exam :( ran into a question so hoping some one will help me understand it. A star is observed to be in circular motion about a supermassive black hole at...

Hi, I am reviewing for an exam on Saturday and I'm looking at some old exams for the course and I came across the question. A tractor (t) is pulling a trailer (m) with a constant velocity. If the velocity is 20 m/s and m = 200kg and t = 500 kg the the force on the trailer dou to the tractor is...

A metal oil tank has cross-section that is a square rotated 45 degrees as shown in the figure above. Its height is 12 ft and width is 12 feet. The oil in the tank has a weight-density of 57 lb/ft3. Write a definite integral that expresses the fluid force on the end of the tank when the oil is...

Homework Statement The Earth and the Planet of the Apes are in a reference frame where they are stationary relative to one another, and are measured to be 2 light years apart. The observers on Earth send a TV signal to the Planet of the Apes with a picture of a banana. 0.6 years later, the...

I have my main UG exam on Sat & i dnt have answer to these questions . Help me out Q. Distinguish b/w degenerate energy level & a degenerate gas ? Ans : Degenrate level : A single energy level can be degenerate with another energy level , no difference b/w their energies . Degenerate...

Ok, I'm reviewing for my exam and I'm having issues with a few of the answers they have given... Let me know what you think. This practice exam seems a little iffy to me... There seem to be mistakes in it all over. One question asked the angular momentum of the Earth and said the answer was just...

Hey, I just joined the forum since I have a few troubles studying for the AP Physics B exam. My school teaches only Physics I, which hardly goes into any detail of the topics covered in AP Phys B exam. To make it worse, they hardly touch fluid/thermodynamics and not much detail into...

There was great input on Studying smarter, thanks everyone. Now when it comes to test taking itself are there any suggestions? All relevant input welcome.

My last 4 test grades have been 77,72,59, and 48(all core major classes) i am so freakin pissed off w/ myself and I am having doubts if I am smart enough for college.Anyway today i was feeling bitter towards school and said F it and cheated on my microcontrollers exam.I sat in the back of the...

Homework Statement Imagine a regular Newtons cradle (google it). The problem gives a the following information. All the spherical ball have the same mass. Ball 1, m_1 is initially raised at height H_i. A) Consider a stack consisting of just two balls. Let the speed of the first ball...

Howdy, I'm tutoring these 3 people for the FE Exam, and they haven't done any math in a looooong time. We're working out of an FE Exam manual, but we're going to run out of questions fast. Does anyone know where a good source of questions can be found online? Thanks!

Question is Problem 7: Joule’s paddle wheel experiment consists of a falling weight which spins a paddle-wheel in an insulated barrel of water. As the weight falls, the water warms up. Assume idealized conditions with no friction in the pulley, string, and bearings. How much does the...

problem is A ball of mass m is attached to a string of length R such that it is free to swing in the vertical plane. The ball is released from the initial position “A” shown in the picture. What is the tension in the string when the ball reaches the lowest point “B” of its trajectory? A. mg...

Homework Statement i am reviewing for a physics exam tomorrow. they posted practice problems and with answers but don't show you how to get the answers. i got most the problems but there are a few I am not sure so figured i would come here and see if you guys can explain it to me. the...

In the laboratory, you are given a cylindrical beaker containing a fluid and you are asked to determine the density ρ of the fluid. You are to use a spring of negligible mass and unknown spring constant k attached to a stand. An irregularly shaped object of known mass m and density D(D>>ρ)...

To demonstrate standing waves, one end of a string is attached to a tuning fork with a frequency of 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M. The value of M is such that the standing wave pattern has four "loops". The length of the string...

This is a question from a TI-83/84 calculator exam that I took on February 14th. (haha what a shocker a math nerd without a girlfriend.) Anyway, this is one of the few that I missed, and when I revisited it I noticed that I had actually misread the question at hand. Anyway, the problem is that...

A spring that can be assumed ideal hangs (vertically) from a stand. a. You wish to determine the spring constant k of the spring. i. What additional equipment do you need? ii. What measurements would you make? iii. How would k be determined from these measurements? b...

A block of mass M is resting on a horizontal, frictionless table and is attached to a relaxed spring of spring constant k. A second block of mass 2M and initial speed vo collides with and sticks to the first block. Develop expressions for the following quantities in terms of M, k, and Vo. a)...

Is there anyone who can help in anyway to study for the Praxis II Physics Content area. I have taken it and just need a little help on what is the best way to study and prepare for this test. Any help would be greatly apprecited.

Method of differences exam question [urgent] Homework Statement \sum^{n}_{r=1}{\frac{5r+4}{r(r+1)(r+2)} Now i know that this is equal to \frac{2}{r} + \frac{1}{r+1} -\frac{3}{r+2} I need to use the method of differences to work out the summation of the series from 1 to n. so i substitute...

im studying for my grade 10 final exam and I've lost my basic formulas note. could someone please post the formulas to find speed time displacement acceleration distance ( maybe) ( i think its in relation to distance and time and speed) also in my review sheet there is this question a...

Homework Statement 16. Determine the end behavior of the polynomial P(x)=x3(x+2)(x-3)2. 19. (No Calculator) Sketch the graph of the polynomial function P(x)=2x^3-x^2-18x+9. Where is P(x)>=0? 22. If P(x) has a local maximum at (1,5) and a local minimum at (-2, -4), then find the extrema...

Homework Statement 9.e. Solve the equation for x: x2*ex+x*ex-ex=0 19. If logxa=0.578 and logay=1.161, what is the value of logxy? 26. Use the fact that logb4=x and logb7=y to evaluate logb(64/49). Homework Equations 9.e. x2*ex+x*ex-ex=0 19. logxa=0.578 and logay=1.161 26...

What do you guys think the best answer tyo these questions are? Descibe in detail an x-ray machine for use in a n undegraduate research lab: (6 marks) Explain how both characteristic and bremsstrahlung x-rays are produced? (4 marks) State two differences between the x-ray machine you...

Homework Statement 6. Draw a graph of the function f, and determine the intervals on which f is increasing and on which f is decreasing where f(x)=2x3-3x2-12x 9. Suppose the graph of f is given. Using transformations, describe how the graph of the following function can be obtained from the...

Homework Statement Suppose V=<Z> where Z is an infinite set, So Z spans V. Suppose that every pair of distinct elements of Z is linearly independent. Is it possible that V is finite dimensional? Justify your answer. Homework Equations The Attempt at a Solution All the vectors...

Two 10 kilogram boxes are connected by a massless string that passes over a massless frictionless pulley as shown above. The boxes remain at rest, with the one on the right hanging vertically and the one on the left 2.0 meters from the bottom of an inclined plane that makes an angle of 60° with...

Hello everyone, I am studying the old exams to prepare for my physics final, and I have gotten sort of confused on a few of them. Help on any of the following is much appreciated. Question 1: Homework Statement Assume 3 moles of diatomic gas has internal energy of 10kJ. Determine the...

Homework Statement A ball rolls up a straight incline. The dots in the diagram represent the position of the ball every 4 seconds. (The fourth dot is not intended to represent the turnaround point; the ball might still be on the way up at that point.) The instantaneous velocities at the...

Homework Statement Making the light. While traveling in your car at a constant 12 m/s, you notice a traffic light 44 m in front of you turn yellow. You know that the light will turn red in 3.0 seconds, and that you can speed up at a rate of 6.0 m/s/s. You’re also aware that it takes you 1.0...