Exam Definition and 886 Threads

Hello, I am going to be taking the ACS physical chemistry exam in a few days and am trying to find out the materrial that will be on it. The ACS website leaves out a lot of stuff in there description.

I'm learning how to do Feynman diagrams for an exam coming up, and have come across diagrams in both position and momentum space. If I'm asked to draw a Feynman diagram without specifying which kind, is it generally assumed that it's in position space? If I label the the incoming and outgoing...

I am taking an undergrad course P Chem II: Quantum Chemistry and Spectroscopy...and the final is a standardized exam from the ACS. I was just wondering if you guys had any tips or knew where to find old exams to practice with. I just was looking for any advice in general too. Thanks a bunch!

Homework Statement This question is in my exam review problem from my complex analysis class. Compute f(100)(0)/100!, where f(z) = 1/(1+i-sqrt(2)z). (f(100)(0) means the 100th derivative of f evaluated at 0.) Homework Equations Cauchy's integral formula might be helpful. The answer to this...

URGENT HELP NEEDED - Last Modern Physics I exam tomorrow I've done reasonably well in the class so far. However, I have not done well since starting modern quantum mechanics. The last several problem sets have covered quantum mechanics, and I failed Problem Set 6. I've never failed anything in...

Hi all. finished the first two papers from my final degrees in physics. Paper 1 was fine but paper 2 was just horrible . I attempted 3/4 q's not all greatly, My question is: Has anyone else here left an exam feeling rotten about what they answered and after a few results showed you didnt too...

Im having some four-vector definition issues. I have a relativity exam coming up and they quite often ask about 4-vectors. 1) Does this definition sound ok? 'A four-vector is 4 numbers, say X=(X0, X1, X2, X3), used to describe an event in minkowski space. The 'zeroth' is the time component...

Homework Statement A small dam of triangular shape as shown is made from concrete. Find the stresses on the foundation at A and B. Assume concrete and water weighs 25kN/m^3 and 10kN/m^3 (All dimensions in the attached picture are in metres) Homework Equations sigma = force/cross...

Does anyone know where I can find engineering exam questions on the web. I am trying to do a survey of various questions from different universities.

limit problem from past exam. :( Homework Statement Problem from an exam that I just did is really bugging me. lim(x,y)->(0,0) (x*y2)/(x2+y4) The attempt at a solution[/b] At first I thought the limit didn't exist. I tried using paths, x=y1/2, but then I couldn't find a counter example for...

Hey, I am currently taking the pre-reqs for medical school and was wondering how difficult this question is for anyone interested. It was on our most recent exam and for Physics I, and I found this question to be too difficult considering there was another difficult conceptual problem (where...

So i got this crazy physics teacher who doesn't actually teach physics. And this is not one of those comments from a lazy kid who doesn't want to learn and uses his teacher as an excuse. On the contrary: I LOVE physics hence i keep getting good grades since i actually teach myself from the book...

Homework Statement I was reviewing some homework problems and looking at the solutions. There is one problem with a tiny step I just cannot rationalize and I am hoping someone can point me in the right direction. I have a spherical finite well: V = {- V_{0}: 0 < r < a}, = {0: r...

Need Answers for AP Physics B 2004 Multiple Choice Exam To check work. I've completed the exam during my spring break. Willing to trade.

Hi everyone, here is one I am really struggling with... 1.Determine the final velocity of a solid cylinder of a 75mm diameter with a mass of 1.4kg if it is moving along a slope of 25 degrees. The total distance traveled down the slop is 11.8m The answer that I reach is a a final velocity...

Hi! I am having an Oral Exam tomorrow, and the only clue about what's coming is this: Being able to describe in an adequate way a solution to everyday electromagnetic issues. I thought I should prepare my self a little bit, so I wanted to ask someone here about what kind of things that...

Homework Statement A positively charged plate is help 5.0 cm above a negatively charged plate. The potential difference between the two plates is 500 MV. A negatively charged object of mass 3.00 grams is plaved on the bottom plate. If the object has a total charge of 100 million electrons...

On a recent java exam we had a problem that asked to capitalize the first word in each sentence a user entered, and echo back the new string. The example that was given was this: good morning. this is a good day. are you ready for the exam? -------> Good morning. This is a good day. Are...

Have exam tomorrow. I know I should have studied before and more, but please help. If you know the answer, please take some time to reply. Thanks very much. Homework Statement There are two charges, q1 = +4.5nC, and q2, ?, which are at distances d1 = 2.5cm and d2 = 2.0cm, from a point...

Homework Statement A force of 1 N pushing on a mass m1 results in an acceleration of 1.0 m/s2. The same force acting on mass m2 results in an acceleration of 3.00 m/s2. What is the acceleration a3 for the same force pushing the combination of m1 and m2? Homework Equations well I know...

I am planning to take the A.P. Physics exam B at the end of the school year. My question is, will this be ridiculously difficult for me? In my regular physics class, we have quite a slow pace on moving forward (We're only on centripital force!). How much will I need to know in order to pass the...

Has anyone here taken the College Board AP Physics exam? I'm currently taking AP Physics online and hate it (more because it's online than the difficulty of the content, though, I think). I'd like the college credit, but it can hurt if I do poorly, too, and I'm not sure how well I'll be...

and that's because i didnt finish the calculations on the second exercice i had a square root of something and i left it like this, she told me that i had to calculate the square root too, but i didnt have the time and that's why i left it like this if you were the teacher would you do the...

In high school I had some issues with my geometry teacher in sophomore year and I ended up never taking any math courses so I ended up with twice as many science credits as math. Right now I'm going to college for the first time(this spring semester at a local community college) and classes...

First Question: A 0.45 N block is given on initial velocity of 5.3 m/s along a horizontal surface. If the coefficient of friction between the block and the surface is 0.25, how far will the block move before coming to rest? How long will it take the block to stop? Second Question: A hospital...

Homework Statement A 1.0kg physics puck is at rest when a small explosion breaks it into three pieces. A 0.50 kg piece, goes north at 10 m/s, a .3 kg piece goes east at 20 m/s. What is the magnitude of the momentum of the third piece. Homework Equations p = mv Momentum Before =...

Homework Statement Two non interacting particles in an infinite potential well. ψn and ψl conditions (n≠l) find <(x1-x2)^2> when: 1-)particles are distinguishable, 2-)particles are indistinguishable bosons 3-)particles are indistinguishable fermions

studying for exam- telescope problem (help!) Homework Statement What diameter optical telescope on the Earth would you need to resolve a lunar lander 3 m across on the surface of the moon 3.8e8m away? Homework Equations The Attempt at a Solution the only thing I can think of is...

Homework Statement A frictionless 3.0 kg roller coaster cart rolls down an incline, and then "loops the loop." At what height, h, should the cart be released so that it does not fall off the circular track. The loop has a radius of 6.0m and a height of 12.0 m. Homework Equations a_c =...

While writing my intro physics exam, I looked at the person next to me, he had his hand stretched across the length of his desk and threw a piece of paper on the ground as soon as I looked at him. He appeared startled. note: we were sitting in the last seat in the corner rows of the...

Homework Statement A pilot wishes to fly 2875 km to an airport 18 degrees east of north from his departure point(for the sake of the problem and simplicity, use the origin). He wants to make the trip in 3 hours and 20 minutes. The pilot finds that he actually has to make a change in his air...

Homework Statement You've got two masses, m1 and m2, hanging from opposite ends of a rope that goes over a pulley with radius R. Both the masses are suspended by the rope alone and the pulley is on a frictionless peg. M2 moves down by x2 meters in 5 seconds. I believe that's all the...

please?

original link: http://www.maths.cam.ac.uk/teaching/pastpapers/2001/Part_IA/PaperIA_2.pdf" Question 11F Dipkomsky, a desperado in the wild West, is surrounded by an enemy gang and fighting tooth and nail for his survival. He has m guns, m > 1, pointing in different directions and tries...

Hello guys. I remember some basic projectiles problems from Honors Physics last year, but I have a feeling they don't involve some of the same complicated concepts of projectiles problems that appear on the AP exam. This Friday my teacher is going to give the class a single question from I...

Hey guys, I have a problem in that I am just out of hospital after having to get a lungs transplant (i have cf). Anyway, i was not expecting it till next year but it came up suddenly and has messed up my studying. My college are willing to be flexible with me and have informed me that I have...

24. The logic expression A ⋅ (B +C) is equal to A. A +B +C B. A +B ⋅C C. A +B ⋅C D. (B) and (C) E. None of the above 25. The expression F = A + AB + ABC is equivalent to A. F = AB+B+ABC B. F = A+B+C C. F = ABC D. (B) and (C) E. All the above 32. The logic equation A + A·B + B·C + C is equal...

Homework Statement You push a 20 kg box from an elevation of zero up a hill. You exert a force of 200 N for 6 m and the box speeds up steadily from rest to 2 m/s. There is a 100 N frictional force that opposes the box’s motion. A) Draw energy bar charts to describe this motion. Be sure to...

some exam question(help help !) Q1.A train traveling at 30 km/h is approached from behind by an ambulance sounding its siren.The ambulance ,which is traveling at a constant speed along a road parallel to the railroad,passes the train and subsequently stops at a distant point ahead of the train...

Homework Statement Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 250 kg. Its maximum angular velocity...

Hi my name is Matt. I'm preparing to take my PhD qualifying exam which consists of a 25 minute PowerPoint presentation with oral questioning to follow. If anyone has a few minutes and would like to take a look and offer comments or questions it can be viewed at...

Homework Statement This problem is from the Australian HSC mathematics extension 2 exam. Q6b) It states: b) Let P(x)=x^3+qx^2+qx+1, where q is real. One zero of P(x) is -1 i) Show that if \alpha is a zero of P(x) then \frac{1}{\alpha} is a zero of P(x) ii) Suppose that \alpha is a...

Anyone? I took it. I think I passed. We will see in 2 months. I took the general exam in the afternoon. The morning section was a breeze but the afternoon section was kinda difficult for me. I am an EE and I am bad at some of the ME stuff. Unfortunately, the exam seems to be skewed toward...

I took my first hourly a couple of weeks ago and barely passed it. I was wondering if someone could go over the questions I got wrong since this is going to haunt me in the future? I. An 8kg crate is being pulled up with a force of F_pull = 60N. Assume the rope is massless and cannot be...

Homework Statement This is a past exam question that involves solving a differential equation. I am using a Fourier series. in the solution they simply state that it is obvious that this equals pi^2/4 for n=1, 0 for n is odd>1, and -4n/(n^2-1) for even n. A{n}=2/pi∫(xsinx)sin nx dx I...

Well I found that HCl was the limiting reagent. I figured that since the equation is a 1:1 ratio I could just set the mols of NH4Cl as the mols of HCl and solve for the pressure using the ideal gas law. Apparently there is another step, where I have to subract the mols of the two gasses, and...

Q) A particle of mass 'm' attached to a string rotates with velocity Vo when the length of the string is Ro. How much work is done in shortening the string to R? One way I thought about doing this was: W= {(m*r*w^2) * r}dr and integrate this from R to Ro But I am not sure if that is...

Can Xor be distributive for all cases ? ex, (X xor Y)Z = XZ xor YZ in all cases?

this is our last quiz on communication.. fortunately, the whole class got zero on this quiz so the professor arranged a retake and made it a take home exam instead.. this is my last hope on passing the course.. so any help would be greatly appreciated.. 1.A superheterodyne receiver having an...

I took linear algebra last fall, and it's my first math class since then. As such, I was a bit worried going into it. Eight problems. I went through the first six rather straightforwardly. However, two of the last three consumed much more time. I kind of started to freak out as I was aware time...