Exam Definition and 886 Threads

Homework Statement 1/ A committee of 6 is selected from 10 people, of whom A and B are two. How many committees can be form excluding A if B is included ? 2/ A committee of 5 is to be chosen from 6 boys and 4 girls. How many committees can be form containing a particular boy X but excludes a...

There's about one week to the Physics GRE. I've worked through all five past exams and corrected mistakes. What would those of you that scored well recommend I do in this last week or so before the exam? Should I retake the five exams timed? Work through the 500 exam questions slowly? Just...

Hey guys! I have an exam tomorrow on back titration. Can i have some useful advice?

... I really ran out time in this exam. I think it was because I wanted to finish math probs and physics probs even though I didn't really have to focus on those so much... Actually later on I realized that I would have gotten A or B from e.g. the math compartment, if I did something like 2/3...

Homework Statement A block of radioactive material is ti be used as a power source for a deep space probe which may be treated ideally as a single Carnot engine. Radioactive decay generates heat in the block at a rate Pin = dQin/dt and heat is extracted from the block to operate the probe at a...

I'm going into 3rd year at a Scottish Uni (4 years for a BSc) and in the first two years I have been struggling to get good grades for my physics courses. I have been getting C's and D's despite reading all the lecture notes, attending lectures and taking extra notes there, reading a couple of...

A beam of which of the following will produce a magnetic field? Gamma rays X-Rays Neutrons Protons Now, the answer they want is protons, to emphasize that moving charged particles create magnetic fields. But is that really accurate? Do moving photons NOT consist of a changing magnetic field...

Should I go through my lectures or just do practice questions, or just watch youtube vids? What's the best way to study for physics? I'm a year one university student. I haven't studied because I've been prioritising other subjects.

Homework Statement [/B] (a) Write down sucient number of equations to determine all the currents i1, i2 and I (you do not need to solve the equations) (b) At the instant the battery is turned on, what is the current I running through the circuit? (c) After waiting for a suciently long time...

Fairly simple question I'd like someone to help with please. My teacher has me confused so I figured I'd turn to the forums for help. 1. Alright, so in an exam we had a ray diagram to draw. "Complete the ray diagram shown in Figure 6" they said (I sketched a replica * thumbs up*...

Hi can anyone help me with this question on inertial forces in gears? Cheers Ali :)

I had an exam last week and I just got it back today. On the exam was a question that I got wrong even though his wording was terrible (he's from India) and I feel that it was not clearly expressed what he was saying. The question is: "A heat engine is 20% efficient. If it absorbs 500 J of heat...

What was it? What was the context? I'd say mine was the Lie Theory and Particle Physics paper I sat today. Universal consensus was that most people felt they'd be lucky to get over 50%. I reckon I did maybe mid 60's, which doesn't seem to be that bad relative to what other people are saying...

Hello there, I am a student who has not been successful in the past. My GPA is very low, because I have slacked off in the past. I have to get a B in my wave/optics exam on Tuesday 4/12 pacific standard time. I am not smart, and my academic intelligence is below average. My last exam I got a 55%...

I've recently failed my first physics exam at a German university and would like to ask for some advice here. I understood 90% of the course content and was able to solve most of the problems, but in the exam, I was often confused and obviously too slow. I ran out of time just as I started doing...

Homework Statement A geostationary satellite is located at 0'N 0'E (degrees), 36000 km above a spherical Earth with radius R(earth) = 6370 km. To scan the fieldof view, the satellite rotates around its own axis(oriented parallel to the Earth's rotation axis). It records one (constant latitude)...

Homework Statement A satellite infrared radiometer (λ = 10 micrometer, footprint size 5x5 km) is observing a region of mixed open water and ice covered sea surface, where the temperature of the open water is -1 degree celsius and that of the sea ice -7 degree celsius. In the infrared, sea ice...

Homework Statement See the PDF. I would like some pointers as to what would be most relevant to talk about Homework Equations Amplitude, cross sections and decay rates. The Attempt at a Solution 1) Particle classification: From the Eightfold way to the quark model[/B] Particles are...

Hello everyone, my dream is studying physics in California at caltech but I want to know what a international student accepted to caltech looks like, that's my situation: i have perfect grades in physics and good grades in math, I studied calculus and trigonometry (trig at the second year of...

hi, i'd like to take P.E. exam to become a professional engineer in Electrical Engineering. I've checked the exam schedule and some related info. One thing that's unclear to me is about the requirements or prerequisites: do I need to work under a P.E. for certain amount of time before...

Homework Statement What can be special cases, in the study of electrical circuits, in which one can not apply wye delta transformation? Can someone graph them in some way? Homework EquationsThe Attempt at a Solution

I just want to give an instance of what happened in one of my examinations. I don't feel bad that I didn't do well because I studied a lot and acquired lots of new knowledge. But, it's hard to explain it to teachers, parents and future employers who unfortunately will just judge the number on...

Hello fellow physicists, I teach first and second year physics at a community college. In particular, I teach two algebra based- and three calculus-based physics courses. I wanted to know if any of you have used any type of challenge exams to place out of the first year physics course. I am also...

Is it ok to email a professor asking them to confirm your grades to this point e.g. you send them all your homework grades and midterm grade in case of error and ask them about your final exam score? Would this be nagging and or condescending. Wouldn't want to hurt my image just before final...

Hello everyone, I found various physics problems online randomly and looks like I can use it to help me study for tests and was wondering if you guys can provide a simple solution/explanation to it. It would be a great help, Thank you! Conservation of Energy: a. If Spring 2 can only compress...

Homework Statement A car moving with an initial velocity of 25 m/sec north has a constant acceleration of 3 m/sec2 south. After 6 seconds its velocity will be? 7 m/sec north 7 m/sec south 43 m/sec north 20 m/sec north 20 m/sec south Homework Equations Im not sure, but X-Xo=0.5( V + Vo)...

Can't find it here on search. This caused huge rumpus when set as exam problem few months ago : http://www.telegraph.co.uk/education/educationnews/11921671/Can-you-answer-the-tricky-crocodile-maths-question-that-left-students-in-tears.html Solve 8 (b) without Calculus...

Homework Statement Hoping to outdo his physics professor, Doofus wants to dramatically demonstrate parabolic motion by throwing a cheese wheel of massm and radius r off of the top of the UW observatory, which is at a height 3R above the roof of the physics building, as shown in the diagram...

I have only took Chemistry in high school and that was about 10 years ago. So pretty much I will be starting from scratch as I certainly forgot everything. Good news is you do not need a high score on the exam to pass (72% I believe). I have about 2 months left in the US and want to take this...

Homework Statement I'm currently studying for an exam, but I don't know exactly what could be on it - the specification is very vague. I was just wondering if there were some useful proofs I should know? I've covered things like proving the diffraction grating experiment, centripetal...

Hi friends , I am an electrical engineering student , interested in applying M.S in physics program in Europe . So i have started preparing for this , when i searched the web how to study for PGRE , most effective and common suggestion is go through the recommended books for each subject and...

Firstly, let me talk about my BC exam situation first and then the Physics C exam secondly. I just recently downloaded a PDF full of released BC exams from 1969 to 1998. Is there any PDF for a fully released BC exam from last year(2015)? What is the best textbook that is oriented towards this...

I was given the equation of a polynomial told to find the derivative. easy enough. Then asked to give the equation of the tangent line which I've only learned how to get in the form of the question: "find the equation of the tangent line at x=" They gave me the equation of a line parallel to...

Homework Statement http://www.physics.rutgers.edu/ugrad/123/prevExams/CH1_2014.pdf Homework Equations basically just kinematics, projectile motion, and force equations.[/B] The Attempt at a Solution I got : 1. either B or D 2. D 3.B 4.A 5.E 6.C 7.D 8.A 9.B 10.B 11.A 12.C 13.B 14.E 15.C...

Homework Statement In a desperate attempt to come up with an equation to use during an examination, a student tries the following equations. Use dimensional analysis to determine which of these equations could be correct. Here x, v, and a, are the position, velocity and acceleration. v2=ax...

Two hollow spheres, both the mass and radius R M , which are rotating around a center of mass ( CM ) , with an initial period To, are kept distant from each other by an ideal wire with a distance of 8R. At a given instant a motor is driven by wrapping the wire and making the two spheres meet...

So, I'm about to take an Optics exam, and while I can easily do most of the last years' exam problems, there are some which I cannot solve for different reasons (perhaps some gross oversight?). Yesterday I stumbled upon this: 1. Homework Statement (my own translation from Catalan) We have a...

Hi i am studying for an exam (after failing the first one) on Quantum mechanics that is in one month from now. I use the lecture notes from the teacher. It includes the following topics and 25 exercises per chapter: Formalism of classical physics state vectors and operators position and...

Hello Everyone, I am trying to study for the cal-tech entrance exam by using the courses on their website. I was wondering if I should be study Ma 1a -Freshmen Mathematics or Ma 1a- Calculus of One and Several Variables or both? Thank you

Hey guys, I really need your help. I have an exam tomorrow and no idea how to solve this task. Sorry for my bad english (did not use it for a long time). I hope that I translated the task correctly so that you might be able to help me. So We have two particles with spin=1 which means they have...

I'm a high school physics teacher and this was a question posed to my Honors Physics class. [Simplified] A light wave travels from water to air. Which of the following variables does NOT change between the mediums?" A. speed B. wavelength C. amplitude D. frequency I intended the answer to be...

In a recent exam, the question came up ""If the object has zero acceleration the object must be at rest" is this statement: A: Always true B: True in space C: Sometimes true D: Never true" Obviously we can cross of the first two, but for the other two its not so easy, for this question I...

A lot of school students in the UK are making quite a fuss at the moment about a question that appeared on a recent GCSE maths exam (GCSE exams are taken in the UK by 15/16-year-old students). The discussion has since spawned its own Twitter hashtag, a variety of memes and has been covered by...

Homework Statement A wheel is pulled over a frictionless washboard surface with a constant horizontal velocity component. The equation of the surface is y=Acos(2πx/λ) where A is the height of the surface and x is the horizontal distance along the surface. At what value v_x does the wheel begin...

Homework Statement See image attached, have completed the parts a and b using steam tables and interpolation and got the answers a) Wet steam h at 10.5 bar: h = 2378 kj/kg b) Superheated steam at 10.5 bar @ 285 Degrees Celsius: h = 3018.12 kj/kg Which I believe to be correct now, parts c,d...

Just panicking before exams, thanks to everyone who can clear things up for me across the sciences. You are doing a great service. Immense thanks again, enjoy your weekends!

A senior police officer was caught cheating in an LLM exam by the invigilator at a college near my place. He was writing his LLM annual examination on constitutional law and was found carrying photocopies of the subject...

1. Homework Statement If the optical path diff between two light waves is lambda/2 will they always interfere destructively? if this in true then wherever one wave undergoes aphase change of pi at one surface and the second wave does not then these two will always interfere destructively...

Could someone please explain this question to me I'll include what I thought the answer was and the actual SQA answers. Please can you read my answer just to see what I'm doing wrong and what I don't understand It's from the 2009 past paper AH physics Thanks so much I really appreciate any...

Little bit stuck with this practice question for my exams, how do they suppose I work out the length of the individual beams or height of the framework without an initial length? Is there a secret way I've never heard of? Any help would be appreciated, it's foundation degree level but probably...