Final Definition and 1000 Threads

Homework Statement 0.020 mol of a diatomic gas, with initial temp. of 20 C, are compressed from 1500 cm^3 to 500 cm^3 in a process in which pV^2=const. a.) What is the final temp. in C? b.) how much heat is added during this process? Homework Equations PV=nRT The Attempt at a...

Hi there, First post on this forum. I'm deciding which subjects to choose for my final year in mechanical eng (MEng) and need some advice regarding which subjects to choose from the list given below. Please note that I'm interested in pursuing a career either in oil n gas industry...

1. I am doing an experiment. I am rolling a ball down textbook that is propped up on one side. If the ball rolled 11 inches in 1.875 seconds. How can I get the final velocity and the change in velocity? 2. I know I can get the average velocity by dividing 11/1.875 and the initial velocity...

Please give me some advice on final year project selection. I want a power related project with heavy programming involved. Thanks for the help guys!

Homework Statement Two identical small metal spheres with q1 > 0 and |q1| > |q2| attract each other with a force of magnitude 70.2 mN, as shown. The spheres are then brought together until they are touching. At this point, the spheres are in electrical contact so that the charges...

Hello guys, I am not sure whether this is actually a simple problem but I'm not really a physics student, just someone very passionate for it. So I'm trying to use Newton's second law in its relativistic version (force is equal to the rate of change in momentum) to find the velocity and...

I had NSF fellowship for the period of 2009 -- 2011, and now I have to fill out final report. When I am trying to fill out the section "publications and products" of my NSF report, it gives me four options: a) Journal publications b) Books c) Internet dissemination d) Other specific...

I am nearing my final year in my EE, and I have started thinking what final year project I would do. What did you do? Please suggest me something, that is interesting to do, a bit challenging, and preferably that sells and can be implemented somewhere in real-world. I have HVDC in mind...

Title basically explains what I'm asking for. It is supposed to be a major design project with complete design, analysis and implementation. Our faculty consistently produces a whole bunch of the dullest projects every year. Suggest something with quite a bit of a wow-factor.

Hello! Well, I am 16 years old and when I graduate high school I want to study theoretical physics. I have some question about that. I live in Bulgaria. Here the level of education at that sphere is not well developed, so I would prefer studying abroad in countries like Germany or the UK...

Homework Statement A system of 57.g of liquid water at 298k is heated using an immersion heater at a contsant pressure of 1 bar. If a current of 1.50 A passes through the 10.0-ohm resistor for 150s. What is the final temperature of the water? Homework Equations w=VIt C=q/deta(t) V=IR...

Let us check the derivation of the liar paradox. 1 Sentence 1 is not true. (Assumption 1) (LIAR SENTENCE) 2 Sentence 1 = "Sentence 1 is not true) (True by inspection of 1) (LIAR IDENTITY) 3 "Sentence 1 is not true" is true if and only if sentence 1 is not true (by definition of truth)...

A roller coaster (475kg) passes point C with a velocity of 10.0 ms-1, calculate the velocity of the roller coaster at point A. mass = 475 kg velocity at C = 10 ms-1 height at A = 30m height at B = 0m height at C = 25m height at D = 12m Ep = mgh Ek = 1/2mv^2 The trolley is moving...

This question on my final blew my mind and I have no clue where to even start: (verbatim, not exact wording and so 'theoretical' I almost posted it under relativity) Given that an observer on Earth with acceleration due to gravity 9.8 m/s^2 has an indestructible frictionless gyroscope and a...

Homework Statement y=-2+sin((\frac{\Theta}{3})-(\frac{\pi}{12})) Homework Equations The Attempt at a Solution [PLAIN]http://img715.imageshack.us/img715/7707/trigg.png Phase shift: \frac{\pi}{4} Vertical shift: -2 Period: 6\pi

Homework Statement A thin target of lithium is bombarded by helium nuclei of energy E0. The lithium nuclei are initially at rest in the target but are essentially unbound. When a Helium nucleus enters a lithium nucleus, a nuclear reaction can occur in which the compound necleus splits apart...

Hi All, I am really struggling with a question, and this is the last one I need to complete and then I can submit my paper. I appreciate you don't like to just give out answers, but I can't work anything out. I am doing an electrical course, but for some reason there are some physics...

Hi, I am a mature student coming back to uni in my late twenties. I currently study computer science and am about to go into my final year. I really know very little physics other than reading why does e= mc2 by Brian cox :-p I was hoping someone here could possibly suggest to me a Physics...

The tallest volcano in the solar system is the 19 km tall Martian volcano, Olympus Mons. An astronaut drops a ball off the rim of the crater and that the free fall acceleration of the ball remains constant throughout the ball’s 19 km fall at a value of 4 m/s2. (We assume that the crater is...

Physics Final Project--YouTube Video--Advice Please! Hey I have to make a youtube video related to physics for our Final event of Physics Olympics. The objective is to make a performance related to physics, post it on youtube, and the scoring would be determined on the last day of class by...

A model rocket has a mass of 3.00kg. It is fired so that when it is 220 m above the ground it is traveling vertically at 165m/s. At the point its fuel runs out so that the rest of the flight is without power. Assume that the effect of air friction is negligible and that all potential energies...

Here is the problem. It consists of a. b. and c. As you can see I found A and B, but C is giving me trouble. My work is also attached. I am assuming that when the question says "with what speed do the supplies land in the latter case." that i am finding final velocity. and I have already...

Every object has the same mass and shape etc. Object a is dropped from the side of the ramp straight down Object b slides down an angled ramp Object c slides down a ramp that is curved Facts No friction All objects sliding All initial velocities are equal All Intial positions are the...

(I posted this in the wrong section earlier, hopefully i got it right this time...) 1.Homework Statement A dust cobweb is drawn from an initial vertical position toward a nearby wall by an electrostatic force. Assume the cobweb to be like a single dust ball of mass 2.0 x 10^-7g suspended on...

if measuring or the act of measurement is considered as an event that finally result in localisation of state of particle then what will be the final conclusion drawn in a situation where many observer observe a single particle simultaneously but they choose different probability values out of...

champions league final soccer?? Your thoughts on soccer , especially the champions league final is near

Homework Statement I am trying to find the final velocity from the given data Work - 3000J Mass - 1/2d (d = distance travelled) Initial Velocity - 7m/s Time - 7 seconds Homework Equations W=change in energy W=Fd The Attempt at a Solution W =work F=force m=mass a=acceleration d=distance traveled...

I'm reviewing the early stuff, and I'm a bit fuzzy on what is a valid random variable. I don't see why (b) is valid while (a) is not. For (b), it says the set is in the family of subsets for all x. There's no mapping from the sample space that is less than or equal to -5. Well, then I thought it...

Hi, I've been given an assignment from college which has me totally baffled! (Ashamed to say this is my weakest subject ha) I have read the rules and I do not wish for my work simply done for me, just a explanation would be brilliant! Or a similar question would be great so I could...

Homework Statement Let \[ A = \begin{array}{ccc} 3 & 5 & 6 \\ 0 & 2 & h \\ 0 & 0 & 2 \\ \end{array} \]. What should be the value of h so that there are two linearly independent eigenvectors of A corresponding to eigenvalue 2? Homework Equations (A-\lambda I) \textbf{x} =...

I want to make it out to the final shuttle launch, but this would be a rather costly trip for me to make. The shuttle Endeavor is scheduled for Monday which might be the last launch, but the Atlantis is scheduled for June 28, if it is funded. What should I do? I haven't been to the space...

Homework Statement A meter stick is suspended vertically at a pivot point 25 cm from the top end. It is rotated on the pivot until it is horizontal and then released from rest. What will be its maximum angular velocity (in radians/second)?Homework Equations I began by setting up a conservation...

Homework Statement I will try to word it the best I can... True or False? If True explain why. If False, provide a counterexample to explain why it is wrong, DO NOT CORRECT THE STATEMENT Suppose f(x) is an odd function and then \int_{-a}^{a} f(x) dx = 0 The Attempt at a...

Homework Statement I spoke to a few people and pretty much everyone but me seem to know what is going on with a few questions. This question was one of the ones I stared blankly for a few minutes and then wrote down an answer \int_{0}^{2} e^{x^2} d\theta The Attempt at a...

final pressure when two gases at different pressure are mixed. The valve between a 5-L tank containing a gas (Methane) at 3 atm and a 1-L tank containing a gas ( Ethane) at 0.55 atm (both are in 50 Degrees Celsius) is opened. What is the final pressure in the tanks? (assume that there is no...

need help! A deep-space probe of mass 4.55 x 10^4 kg is traveling at an initial speed of 1.22 x 10^4 m/s. The engines of the probe exert a force of magnitude 3.85 x 10^5 N over 2.45 x 10^6 m. Determine the probeʼs final speed. Assume that the decrease in mass of the probe (because of fuel being...

compute the limit lim as x,y --> (0,0) of (x+y)*ln(x2+y2) i would use polar coordinates if (x+y) was (x^2+y^2) but that not being the case is messing with me. and than another one is the same parameters, but of (x^2*y)/(x^4+y^2). for this one i attempted to do the partial deriv of both x...

Homework Statement Two insulating spheres having radii 0.22 cm and 0.42 cm, masses 0.16 kg and 0.47 kg, and charges −4 μC and 5 μC are released from rest when their centers are separated by 1 m. How fast is the smaller sphere moving when they collide? Answer in units of m/s...

if a ball is thrown and caught at the same height with constant horizontal velocity and no vertical displacement is its initial and final velocity the same? since v2y^2=v1y^2+2aDy, no displacement means final vertical velocity will be the same as initial, since v2x=v1x, horizontal velocity...

Homework Statement http://img687.imageshack.us/img687/9065/matrixk.th.png Uploaded with ImageShack.usThe Attempt at a Solution Alright, here is how I did it. First I need to find my eigenvalues \begin{bmatrix} 0-\lambda & 1&2 \\ 0& 3-\lambda& a\\ 0 & 0 &0 -\lambda \end{bmatrix} So...

Homework Statement a) Initially, mass one (2.40 kg) has a velocity of 5.70 m/s and mass two (2.20 kg) is at rest. After they collide, mass one emerges at an angle theta = 31.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are...

Homework Statement Two cars, both of mass m, collide and stick together. Prior to the collision, one car had been traveling north at speed 2v, while the second was traveling at speed v at an angle \phisouth of east (as indicated in the figure). After the collision, the two-car system travels at...

I was solving a projectile motion problem and was wondering if, while going downwards, an object's final y velocity can be less than the initial y velocity. If this is true, would this change the time until it hit the ground? The only reason I was thinking about this is because if x/v = t. If...

I have a kettle of aluminum with the mass of 1,10kg. There's 1,15kg of water in it, with the temperature of 20,2 C. The water is cooled with ice cubes. 150g of ice with a temperature of -25 C are poured in. What is the final temperature? I'm relatively new to physics, and I haven't solved...

Advise --choosing final year undergrad courses I need to pick my module choices for my 3rd and final year, and I am stuck on the final few modules I should choose. For my final year, I already plan to do courses in complex analysis, functional analysis, stochastic processes, and advanced...

Attached is my practice physics final. I need help! Below are my attempts at solutions... probably way off but maybe I just need a head start. Thanks for looking! PS We are told to use 10 m/s^2 for gravity. --Nash. III. 1) at the top, all potential energy = mgh = 1*10*6 = 60...

Homework Statement Hey guys, I just read Physics, by Halliday, Resnick and Krane. There's a chapter on rotational dynamics, and the example goes like this: A yo-yo of total mass M = 0.24kg consists of two disks of radius R = 2.8cm connected by a thin shaft of radius R0 = 0.25cm. A string of...

Homework Statement A pion is a spin-0 particle with a negative unit charge. A neutron is a spin-1/2 particle with no charge. A proton is a spin-1/2 particle with positive unit charge. One can construct an unstable version of the hydrogen atom where the nucleus contains both a proton and a...

hey guyz i am a student of aerospace engineering(6th smester). now i have to choose my final year project. can anyone give me ideas of some exciting aerospace engineering projects which involve designing, controls and febrication. m waitng for ur reply...

hi friends,i am going to design a flywheel for my final year project.how to design it? actually my project is electric bicycle.i am going to connect fly wheel with gears.my cycle will power by both manually & electrically.