Exam Definition and 920 Threads

two questions that i can't ever remember covering first of all finding a perpendicular vector find a vector perpendicular to the vectors a=i+2j-2k and b=-2i+3j+5k and secondly the equation of a plane?? through point with position vector (2,1,1) and perpendicular to (3,-1,2) what are the...

two part question the first part i understand the second part i dont first part is find the eigenvectors and values of the matrix (4,-1 then below-4,4) giving me lamda=2 (1,2)T and lamda=6 (1,-2)T after this we have part 2 that i don't really understand how to do, I've done it before...

Velocity, Acceleration, Displacement, Headache I have an exam tomorrow. Can you help me out with these physics questions? They are review questions that I am stuck on. 1) Distance is 45 km and it took 3 seconds what is the speed. If the displacement is 7 km north what is the velocity? *I know...

Homework Statement A woman of height 1.7 meters stands directly in front of a convex mirror 2.0 meters away. The mirror has a radius of curvature, R=-50cm. Find the location and size of a woman's image using the ray diagram and mirror/lens equation. ---------- 2. The speed of light in a...

Homework Statement Explain why the line <x,y,z> = <3,1,4> + t<4,-5,2> is parallel to the plane with equation 2x + 2y +z = 7 Homework Equations The normal vector of <x,y,z> [4,-5,2] and the plane equation 2x + 2y + z = 7 The Attempt at a Solution Well, I'm trying to review for the...

I'm preparing for an entrance exam and i have this problem that is puzzling me. tan(5x) = tan(3x) I suppose i should start off by: sin(5x)/cos(5x) = sin(3x)/cos(3x) but i don't know what method to use. Should i break everything down to a single x? Please give me a hint how to start.

I have been working on a series of questions dealing with gas expansion and temperature change for my PE exam. \frac{}{}

Give me some tips! Hey guys, Can anyone give me some tips for distance learning education, with the help of which I can perform well? I can score good marks in exams. Please give me some tips for it. Any help will be highly appreciated. Thanks in advance.

I want to get a book on inequalities to help prepare for the Putnam exam. Its common for me to spend about half an hour getting frustrated on a practice problem and then find that the only way to do the problem is with an inequality that I have never heard of. Does anyone have any...

URGENT: Complex Numbers Problems: HELP NEEDED FOR MY FINAL EXAM!? Q1: Write the numbers in the form a+b: i) (2+3i)/(1+2i) - (8+i)/(6-i) ii) [(2+i)/(6i-(1-2i))]^2 Q2: Simplify: i) i^11 ii) i^203 Q3: Show that the points: 1, -1/2 + (i*squareroot(3))/2, -1/2 -...

First a word of explanation about my circumstances, skip the italics if you're not interested: I have a (vitally important) exam on differential equations coming up in two weeks, and I have no institutional support (lectures, tutors, etc). It's not a subject I've studied in any depth before but...

My final exam is tuesday and I am having an extremely extremely hard time grasping arrays and strings. I just can't visualize how they work and I am stuck on how to get my printOwnedShares function to work properly in a project that will help me study for the final. This is what I have worked on...

Hey guys, I am studying for my final for Gen Chem and will be taking the ACS gen chem exam this week. Has anyone here taken it before and if so, what equations and/or constants will be given? Thanks for the help guys! Medline

hi, i have my SAT exams this saturday. i was wondering whether anyone would be having some tips concerning the test. I'm an international student (from mauritius). my mathematics is ok, but the english section might be hard, specially for words i never met before!

I have no idea where to start with this question. Can anyone help? Figure Q1 is a block diagram representation of a ship steering system where \Psi is the actual heading angle, \Psid is the demanded heading and \delta is the input signal to the steering gear controlling rudder movement...

And, just a few minutes ago, I realized I forgot to square a constant in solving for rho in spherical coordinates in determining the limits of integration for a triple integral. I got cosine of phi as 1/2, which gives phi as pi/6, but since I forgot to square the two, it actually is pi/4. :mad...

take home exam urgent latex help! hi! i don't know anything about latex, but i need pictures a matrix: it is a tridiagonal matrix with (1-2lambda) on the main diagonal (except for the last row where it's 1-lambda) and lambdas above and below: [(1-2*lambda) lambda 0 0 ........ 0]...

Hi there, I'm wondering if anyone can help with this general problem. I'm studying for a BEng in Electrical/Electronic Eng degree by distance learning and am on the subject of Control. I understand most of the coursework and can do most of the questions in the notes. However, I've got hold...

Does anyone here have any suggestions on how to memorize things (Dates, names, places, etc) for a history exam? I'm taking a history of technology course, and the exam is next week. Hopefully someone has a good suggestion other than just reading over the material a hundred and fifty times...

Homework Statement Let P be the 4 momentum u be the 4 velocity a) Evaluate the Lorentz invariant P^2 b)Differentiate P^2=P_{\mu}P_{\mu} and show that \vec{u}\cdot\frac{d}{dt}\left(\frac{m_{0}\vec{u}}{\sqrt{1-u^2/c^2}}\right)=m_{0}c^2\frac{d}{dt}\left(\frac{1}{\sqrt{1-u^2/c^2}}\right)...

I'm doing a calc BC practice exam and I found this question that stumps me to the max: The function y=x^4+bx^2+8x+1 has a horizontal tangent and a point of inflection for the same value of x. What must be the value of b? I know that points of inflection are found from the second...

Abstract Algebra Questions - Need help for exam! Homework Statement I am studying Abstract Algebra in college and my exams are approaching fast.I need somebody to help me out to do a few exam papers. I am going to post the questions below from the exam papers and if you can advise me how...

exam help! Hydrostatics 1. Homework Statement A girl of mass 40 kg and volume of 40 liter wants to keep her head of volume 3 liter above water surface as she can't swim . how much air in Kg should she fill in her jacket?? 2. Homework Equations 3. The Attempt at a Solution mass...

Hello all, I've got an exam tomorrow so any quick responses would be appreciated. I'm following the Boas section on Laurent series... Anyway, here's my problem: In an example Boas starts with f(z) = 12/(z(2-z)(1+z), and then using partial fractions arrives at f(z) = (4/z)(1/(1+z) +...

Almost no one has answered.To take some external help, i write all questions here, maybe someone have an answer. 1)An aluminium cube cooled down to 90 Kelvin.At this point there is too many microstates available.how much heat we need, to increase these microstates in factor of 10^{10} ...

:smile: http://funnyexamanswers.com/img/humandrawingis4.jpg http://www.funnyexamanswers.com/img/usecalctoproofofbatmanis.jpg interesting not exactly an exam answer but pretty interesting

First off, I'm not sure whether this should be in the homework section since it's not homework, but this seems the best place to get help with it. If it should be moved, please feel free to do so. These are a few problems I had with one of the GRE practice exams (from one of the Practicing to...

Im studying for the Fundamentals of Engineering exam (coming up April 12!) and came across this Thermodynamics problem in my review book. So the work for an isothermal process is RTA*ln(VB/VA), where VA was previously determined to be 0.103m3. In the solution to the problem, the RTA term...

I have a maths exam in 3 days, The topics are as follows, plus i included what kind of questions the topic will ask, not saying i don't know how to do any of these, but what's the most efficient way to revise these topics thoroughly? Basic arithmetic- eg. Evaluate...

i am in 11 grade and i have taught myself calculus so the calc teacher at my school sighned me up for the A-B calc exam and i was wondering what types of problems are on the A-B calc exam and what do i need to get more in depth with to take the A-B calc exam?

Hi all. I have a biochem test tomorrow, and would like some help. I went through the practice exam that was given to us, and from past experience the real test and practice test tend to be very similar. Also, from past experience, I tend to get a couple of them wrong because I believe that I...

Yes I need help with my exam, my teacher gave us one day form making it and it guves us all the options we can have. So that is way I am asking for help. spring makes 12 vibrations in 3 seconds. 1

cr and lr circuits help.. exam in a bit and I'm stuck! okay so here's my question : how is the peak voltage across the resistance (in a cr circuit) or the induction (in an rl circuit) = \pmV_{m}/(1-e^{-T/2\tau}) V_{m} is the max voltage of the pulse train. the m denotes max both...

Well, as I was driving to Wal-mart tonight, I began to think about a particular problem and realized I did it incorrectly. It was an Atwood Machine question. In writing out Newton's Laws, in a split-second decision, I didn't add the other mass when figuring out the acceleration of the system...

I'm in University Physics I - Mechanics and Heat. The exam had six problems, and I made stupid, careless mistakes on 3 and ended up with an 85. I should have had an A. It was over probably the easiest subject matter of the course: Math Review, Velocity and Acceleration, and Vectors. I'm frickin'...

[SOLVED] Help on an AP exam problem I teach AP physics in high school and encountered this problem, from the 1982 AP Physics C exam. http://keydetpiper.com/Misc/1982C.html" has a link to the original problem (#2) and the official solution. My question is regarding part c: how is it possible...

Ok, here we go. The question asks, for matrix A = 1 1 3 3 0 1 2 2 6 , find a vector b such that Ax(x is a vector) = b has no solution. I found the rref(a) = 1 0 1/3 0 1 8/3 0 0 0 Now to, answer the question, I gues the equation has no solution if one of the rows...

I totally can't figure out rate mechanisms for whatever reason. A three-step mechanism has been suggest for the formations of carbonyl chloride: Step 1 Cl2 -> 2 Cl(fast, equilibrium) Step 2 Cl + CO -> COCl (fast equilibrium) Step 3 COCl + Cl2 -> COCl2 + Cl (slow) What is the...

Exam coming soon, need urgent help with this question! Homework Statement A body leaves a point A and moves in a straight line with a constant velocity of 40m/s. Ten seconds later another body which is at rest at A is given an accelleration of 2m/s2 and moves in the same direction as the...

Homework Statement Got an exam later today on this, just looking for some practice. I know this is kinda reverse of what the forum is intended for, but I'd like to ask for people to post some problems that I can solve via Integration by Parts. Just like 5 or so. Homework Equations...

Anybody taken the ap calculus ab exam? I'm taking the class right now, just curious to what you think about the exam. I expect it to be rather easy. ap calculus seems oversimplified. advice?

i m preparing for AIPMT ,so please tell me where cud i get essential notes,past years papers n e-books on it.can anyone giv link to Arihant Plant kingdom e-book,please i need it.

I need to learn optics, SR and continuum mechanics for my physics qual exam in June. Can anyone suggest some books that would be appropriate for self study?

Homework Statement Info : g=10ms^-2 Sin30=0.5 Cos30=0.866 http://img227.imageshack.us/img227/8332/xfgdda0.jpg A box of mass m = 50 kg is initially at rest at point A on a floor with coefficient of kinetic friction μk = 0.1 (see figure below). A person starts pulling the box for...

Do PhD students in the UK have to undergo exams on important areas of physics (e.g. EM Jackson-style) not necessarily related to their area of research the way that American grad students do?

I found the following link which clearly delineates and explains how exam papers are graded by professors: http://www.concurringopinions.com/archives/2006/12/a_guide_to_grad.html

Harmonic Oscillator 9. An ideal harmonic oscillator has energy levels separated by a constant 0.05 eV. That is, the difference between the ground state and the first excited state of this oscillator is an energy of 0.05 eV. This single oscillator is brought into contact with a large solid...

if you have an exam in the next 24 hours, please don't click the link in this post. In fact ..don't even read the URL. It's too risky. Just walk away and don't look back. I told you not to even come in here, but you just had to, didn't you...

Did anyone else toil away for six hours yesterday at the Putnam exam? I'm fairly confident that I got a couple. ________ A1: Find a where y=a x^2 +a x + \frac{1}{24} and x=a y^2 +a y + \frac{1}{24} are tangent. This was easy, once you recognize that the curves could only intersect (i.e...

Did anyone here take the Putnam exam this weekend (or administer it)? What did you think?