Exam Definition and 920 Threads

I just wrote my senior school certificate exam ,but could not solve one of the maths questions .the question is as follows 3 night quard a,b,c blow their their whistle at intervals 8,15,and 18 minutes respectively.if they blow together at 11.00 p.m,when next are they expected to blow together

I have a major exam coming up and we've been given few past exam papers to go through to practice. I have absolutely no idea what to do here :frown:, if people could help me out, work it out etc. It would be greatly appriciated. Link 1: http://img72.echo.cx/img72/3763/question0ex.jpg...

have a final exam on monday, and cannot figure out the stuff on estimators: 1) a random sample of size 2, y1, y2 is drawn from the pdf f(y, theta) = 2y(theta^2), 1 < y < 1/theta. what must c equal if the statistic c(y1 + 2y2) is to be an unbiased estimator for 1/theta. I really don't...

Q. A heat engine cycle is executed with steam in the saturation dome. The pressure of steam is 1 MPa during heat addition and 0.5 MPa during heat rejection. THe highest possible efficiency of the heat engine is. How to calculate heat efficiency? W = QH / COP,hp and COP = 1 / ( TH...

Has anyone out there taken this exam? It's required in most places in the U.S. to get a Secondary Math Teaching License/Credential. I'm taking it in June. Any advice? Was it hard? Easy? What should I study?

Hi, I'm really hoping somebody can help me. basically i have an exam coming up very shortly and from my revision thought i was doing ok with the relativity section. When i have come to look at past exam question i have discovered that although i know my theory i haven't a clue how to actually...

There are two things related to using oscilloscopes that I am a bit fuzzy on for a practical lab exam I will take tomorrow morning: 1) Use the oscilloscope to determine the frequency of the square wave between terminals B and C of the test box. ( We will press and hold down the button on...

Exam revision question. Help! Hello. I have a thermodynamics exam tomorrow. This is a past exam question and I'm not doing very well with it. If anyone has any ideas please help! A charge enters a spark ignition engine at 330K and 1 bar, and is isentropically compressed through a ratio of...

Physics 2 exam tomorrow. Need help with a couple more problems and I am good! :) 1. a circuit has a 137 mH inductor across AB (the whole curcuit is a square with corners ABCD), a 50 ohm resistor across BC, and a 25 uF capacitor across CD with a 115V @ 60 hz power source between DA. What is...

To prep for the upcoming AP exam, I got all of the AP Exams 1995-Present, but cannot find anywhere to check my answers for the free response sections online. Does anybody know if the answers are posted anywhere? :eek: this AP exam is going to be soo hard!

When you have extra time on an exam? My itenary goes something along the lines of: Do exam (mark questions down and skip if questions are allowed and the question isn't worth 50% of the exam) Ask all questions at once Finish exam Review exam Estimate Mark woohoo, 93.6666~ on economics!

Hi, I currently taking Physics: Waves, Optics, Thermodynamics, (calculus-based). There are many books that provide sample exams such as the one call Instructor's Exam File. However, I don't have the one for physics III. Can you help me by posting a sample of your instructor's exam (with...

I was wondering if anyone here has taken the FE exam lately, or at all. When is the best time to take the exam? Maybe senior year? Also, my course schedule allows me to take a few electives, incase I want to take courses from other disciplines for the FE exam (I'm an EE). In my case, I...

urgent help relativity exam in in 5 hours an electrion with mass 9.11e031 kg has momentum 4e-22. what is its kinetic energy the answer is 6.3e-14 J but i have no idea how to get here relativity kinetic energy = (y-1)mc^2 where y = 1/(square root of 1-(v^2/c^2) momentum = ymu thats...

This question appeared on 1986 AP Exam. 1) In water, hydrazoic acid, HN3, is a weak acid that has an equilibrium constant, Ka, equal to 2.8E-5 at 25 degree C. A .300L sample of a .050molar solution of the acid is prepared. Now.. there is a part d) to this question... d) To the remaining...

Ok, if you had a question where a cart (m1) is resting on a surface, and is attached to a string passing over a frictionless pulley, off of which another mass (m2) is suspended in the air, what is the equation that I use? It is like an atwood machine, except m1 is on a surface, and, I need to...

How would I go about solving this problem? Determine the minimum angle at which a road should be banked so that a car traveling at 21.5 m/s can safely negotiate the curve if the radius of the curve is 159 m. If anyone has any sites explaining how to as well I'd appreciate it if you could...

I know this is an easy question but I want to confirm that I've got this right. The wavefunction \psi(r) can be expressed as a linear sum of orthonormal eigenfunctions \phi_n(r) by \psi(r) = \sum a_n\phi_n(r). Derive an expression for the coefficients a_n. I think the answer is a_n...

Hey, in the process of searching for an explanation for this problem tonight, I stumbled across this forum. I usually do well in physics, but our semester exam is tomorrow and, as I'm reviewing, I am drawing a complete blank on everything! I'll just give one problem, to see if someone could get...

Hey, I'm practising some exam review questions that i was given but i can't figure this one out A sunbather, drifting downstream on a raft, dives off the raft just as it passes under a briidge and swims against the current for 15 mins. She then turns and swims downstream, making the same...

this is my second set of questions today, revising for an exam just now. would be grateful to anyone that can answer 1) The pendulum of a clock consists of a thin steel rod carrying a small heavy bob. the clock keeps correct time at 15 degrees centigrade, calculate the error in twenty four...

Hi, I just want to ask a simple question about quantum mechanics... This question appears in it's original form here: http://www.chriscentral.com/physics/PC3101.PDF (question 2) I have had a go and put some notes into the text below... I am stuck on parts c) (ii) and (iii). Any help...

These are questions from my previous tests within this semester that I didn't exactly get correct. I can't seem to figure them out/find an example, nor is my teacher going to be available before my exam. So here I am. I need to know how to solve them, and them to be solved. These are not...

I'm having an exam on graph theory next week and I'm having some problem with understanding the meaning of calculating eigenvalues of adjacency matrices for graphs. My notes suck from the lectures and I'm totally lost... Our professor asked "What is the sum of elements in row k of the...

In my Chemistry class we are doing some old diploma review questions in order to prepare for this year's Chemistry diploma. I have answered almost all of the questions. It says: The above apparatus (I'll explain the diagram later) was used to determine experimentally the molar enthalpy of...

I was in Borders the other day for something, and behind the counter I saw a book, GRE Exam 2005 (comes with cd rom). Does anyone know what that is? It really got my attention and since they had one on the shelf I left with one. It looks like test preparation for some type of test. My gal...

I have a mechanics exam coming up, and I'm going through a textbook answering questions. I'm really stuck on the following: A lift ascends from rest with an accceleration of 0.5ms before slowing with an acceleration of -0.75ms for the next stop. If the total journey time is 10 secs, what is...

Hey what's up guys... Ok i have a calculus final that covers limits, derivatives, and applications of differentiation. Can you give me any pointers or tips on what i should focus on most. I am allowed a sheet of notes, so far i put all the limit laws, and the differentiation rules on it. what...

Since I'm studying for my final exam, I'm going to make you guys suffer. Any help would be appreciated in this. Here's the first one... Find the 40th term of the arithmetic knowing the general term a(n) = a(n-1) + 4 and first term a1 = 13.

These might be really silly problems for a lot of you but I'll have an exam in 2 hours and I still don't know how to do these problem ( which's supposedly the types of questions that will show up in the exam). I'll be really appreciate if someone can help me! 1. An uniform thin rod 80 cm...

OK I've been given a past paper for revision for this years physics exam (I'm 14). There are 3 question I need help with working out Here are the questions 1. Two tugs are pulling on a ship with forces of 1500kgf and 2000kgf respectively, each at angle of 45 degress to the longitudal axis of...

Studying for exam, need help! Hi can someone help me out. My girlfriend has an exam tomorrow and she got stuck on this question. Her professor decided not to give out any solutions she's not too sure if she is heading in the right direction. Any help would be great, thank you in advance...

I'd just like to say I have my last exam for the year tomorrow, then I have three months off, in the Aussie sun, lazing about. By midday tomorrow I will be so drunk I won't even know my own name. I don't mean to rub it in... ...oh wait a minute, yes I do!

Just a question to clear things up regarding to the integrating factors for my exams tomorrow: The standard first order differential equation has the form: dy/dx + p(x)*y = q(x). where the integrating factor is e^(integral of p(x) dx). But in one of the previous year paper, it has...

Hey all. I am new. I am from the merry old land of aus (Australia), in the southern state called victoria. I almost crapped my pants when i saw this site. I couldn't believe that there were people interested in this stuff so much. I am in year 12, and i have my biology exam on the 1st of...

Well i have this problem not related physics but overall physcology well i am able to solve most of difficult problems easily at home but whenever i am put in exam like conditions,tests i falter there is some kind of mindblock which sets in and i am not able to get ideas which are central to...

I have an upcoming exam on special relativity. What i would like to know is, how one should proceed about studying for it? Thanks

Thanks for the help you have shown me so far, it has been very much appreciated. I am preparing for my first Physics I exam and would like your opinion. We are allowed a single 4 x 6 index card to take to class and use on the test. We will also be provided formulas and conversion factor data...

It is obvious that on this forum there are a lot of very knowledgeable people. So I want to ask the big question...how do you do physics and math. I know it sounds like a dumb question but I do good in my physics and math class quzies but how come on the exams(i don't do bad) but its not...

Hello, I'm new here. Basically I have this practice excercise for my exam.: http://capa.hep.uprm.edu/msuphysicslib/Graphics/Gtype06/prob09_xph183f6pic2.gif My general problem is that I'm bad with separating forces into components, and I assume this excercise deals with that. Can...

Hello, I'm new here. Basically I have this practice excercise for my exam.: http://capa.hep.uprm.edu/msuphysicslib/Graphics/Gtype06/prob09_xph183f6pic2.gif My general problem is that I'm bad with separating forces into components, and I assume this excercise deals with that. Can...

Hi everyone, really would love it if someone could help me with this. I think it's probably a very easy problem, only I can't seem to find the right formlula, or understand the only one I found... This is the problem: I'm in my car, driving towards a crossing with a red traffic light...

Hello people, first of all thanks to all who reads this and attempts this problem or more or less helps me see the underlying principles. A little background...i am a first semester 23 yr. old summer school physics student who has an exam tomorrow, monday night. The exam covers buoyancy...

Two rods, one of aluminum and the other of copper, are joined end to end. The cross-sectional area of each is 4.0 x 10^-4 m^2, and the length of each is 0.040m. The free end of the aluminum rod is kept at 302 degrees Celsius, while the free end of the copper rod is kept at 25 degrees Celsius...

Going to have a exam please help me :) will the potential energy different between 99 oC water and 1 oC water ?

I found this on another forum. Thought it was funny. http://www.enzine.cyborgcow.net/exam/ :eek:

Hi, I am in grade 11 and need some help for my final exam in physics. I have read the one of the sticky posts and I am not looking for someone to do my homework, just looking for some good notes that I can use to study. The first topic that I need help on is on "Dynamics" The question is on...

Okay I've got a fields exam coming up so like a good boy I've been practising with past papers :wink: but there is this one question that is driving me batty :confused: a) Consider a long cylindrical co-axial capacitor with inner conductor radius a, outer conductor radius b, and a...

Hi all! I'm a student in APU University, Cambridge, England. One of my modules is Analogue Electronics, Exams are a few weeks away and i wanted to get an idea of how well I've grasped some of the concepts. We have been given a sheet to work through but have no one to mark it as all lectures...

How did everyone do? :)