Final Definition and 1000 Threads

As finals are approaching, I'm looking for practice final exams from other universities which will allow me to test my knowledge and prepare for exams. So if anyone is willing to share/has links to a collection of practice tests of Quantum and Classical Mechanics at the undergraduate level, that...

Homework Statement A small robotic spacecraft (m= 145kg) is initially moving in the +x-direction at .150 m/s. Then, its x-axis thruster exerts the following force on the spacecraft : Fx(t) = -5.00 N during 0s<t<1.5s -9.00 N during 1.5s< t< 3.25s -6.00 N during...

Homework Statement Shouldn't average velocity multiplied by 2 be equal to final velocity. We were doing a lab and we calculated an average time of .54 seconds to travel 1.92 meters. Multiplying the average velocity by 2 gives an extremely different answer than vf=gt. I know there is...

Homework Statement So basically I have plotted two variables I measured on a graph, which gives a simple linear relationship, and have found the gradient and standard error of the gradient (1.21251 and 0.03275 respectively). Now my problem is that this gradient is equal to a constant divided...

Homework Statement The specific heat of lead is 0.03 cal/g*C. 300 grams of lead shot at 100* C is mixed with 100 grams of water at 70* C. What is the final temperature of the mixture if the container is insulated. Homework Equations The Attempt at a Solution Q1 = c1m1(Tf - 100)...

Homework Statement Use Newton's 2nd Law, sum of torques, and kinematic equations to determine the angular speed of the spool shown in the figure below. Assume the string has a negligible mass, and it turns without slipping. Use g=10 m/s2 for acceleration due to gravity. Homework...

Hi i am a brand new member to this forum i am studying to be a power engineer and thermodynamics is one of the courses I need to succeed. If i could get help with this problem it would be much appreciated. Homework Statement A perfectly insulated box contains 3.50kg of dry saturated steam...

Homework Statement Three ice skaters are on a perfectly smooth frictionless lake. They are together at rest at the middle of the lake when they push off on each other. When skater #1 (m1 = 80 kg) is 6.00 meters EAST of the starting position, and skater #2 (m2 = 60 kg) is 6.00 meters NORTH of...

Homework Statement A number of k people standing on a stationary car. These people jump off with a velocity of v relative to the car one by one. Assume these people jump to the direction, what is the final speed V of the car.Homework Equations initial momentum=final momentum The Attempt at a...

Hi, I am new here, so please direct me if I am posting completely wrong here. Imagine a small enclosed chamber filled with dry H2O gas. The properties are: 0.5 Bar 8.0 kJ/(kg*K) 200C 2850kJ/kg An infinitely large reservoir of H2O gas has the following properties: 1.0 Bar 8.0kJ/(kg*K)...

Homework Statement Three different mass projectiles, mA > mB > mC, are launched from the top of a building at different angles with respect to the horizontal. Each particle has the same initial kinetic energy. Which particle has the greatest kinetic energy just as it hits the ground? Why...

A mill wheel 400 kg and radius 2.50 m, with 8 blades diametrically opposed to each other of 3.00 kg each, is driven by a jet of water to a tangential velocity of 5.00 m / s. If a rock off 4 blades diametrically opposed, what will be the final tangential velocity of the treadmill? My question is...

Hello everyone, I'm stuck on a dynamics review question. I was told to solve like I would with other inclined planes, however mass was not given. I am not sure how to proceed. Homework Statement A roller coaster reaches the top of the steepest hill with a speed of 1.4 m/s. It then descends...

Homework Statement As a 1.00 mol sample of a monoatomic gas expands adiabatically the work done on it is -2.50x10^3J. The initial temperature and pressure of the gas are 500k and 3.60atm. Calculate a. The final temperature and b. The final pressure. Homework Equations First law...

Homework Statement The diagram below depicts an RC-circuit where C = 3.45 F, = 29.0 , = 28.0 , and = 3.00 Volts What is the current through immediately after the switch S is closed? 1.03×10-1 A What is the current through immediately after the switch S is closed? 1.07×10-1 A What...

I've been given this problem http://i.imgur.com/7XtYt.png and I had no idea of how to come up with an answer since it is a circular path. The only thing that occurred to me is find the initial height using the chord length formula for a circle and then treat that chord as the hypotenuse of a...

Homework Statement Starting with 2.50 mol of N2 gas (assumed to be ideal) in a cylinder at 1.00 atm and 20C, a chemist first heats the gas at constant volume, adding 1.52x10^4J of heat, then continues heating and allows the gas to expand at constant pressure to twice its original volume...

Homework Statement a) A jet fighter has two engines each generating 70,000 N of thrust. What is the acceleration of the 15,000 kg jet? b) The above jet reaches a final velocity of 240 m/s. What is the frictional force on the jet? Homework Equations Ff= Fn(mew?) F=MA ? The...

Final Velocity... Problem: A hockey puck is given an initial velocity of 40.0 m/s along the ice. Find the speed of the puck 1.00 s later if the coefficient of kinetic friction (U) between puck and ice is 0.600. (HINT: The result is independent of the mass of the puck.) My solution...

Homework Statement An ice cube, weighing 100g, is dropped in 1kg of water at 20 degrees C. Does the ice melt? If not, how much remains? What is the final temperature? The latent heat of fusion of ice at 0C is 6.025 kJ/mol, and the molar heat capacity of water is 75.3 J/K mol Homework...

Homework Statement Two thermally insulated vessels are connected by a narrow tube fitted with a valve that is initially closed. One vessel of volume 16.8 L contains oxygen at a temperature of 300 K and a pressure of 1.75 atm. The other vessel of volume 22.4 L contains oxygen at a temperature...

Homework Statement A copper calorimeter can with mass 0.466kg contains 00950kg of ice. The system is initially at 0.0C. If 0.0350kg of steam at 100C and 1atm pressure is added to the can, what is the final temperature of the calorimeter can and its contents? Homework Equations Q=mL Q=mcΔT...

Homework Statement A golfer strikes a stationary golf ball, and the force applied by the club on the ball varies as shown in the graph below. Use this graph to determine the final speed of the golf ball. The mass of the golf ball is 0.1kg Homework Equations Area of triangle = 1/2bh...

Homework Statement Suppose CA = CB = C in equations 2.93 and 2.109 (shown below). Compare the form of expressions for the final temperature. Homework Equations (2.93) T = \frac{C_{A}T_{A} + C_{B}T_{B}}{C_{A} + C_{B}} (2.109) T = T_{A}^{\frac{C_{A}}{(C_{A}+C_{B})}}...

Homework Statement A woman running at constant velocity speeds up and accelerates uniformly to the west by running 253 m west in 6.12 s. ff she ends up getting up to a velocity of 5.05 m/s w, how fast was she going originally? If she had run the same disance in 5.50 s, what would her average...

So the Rugby World Cup quarter finals are decided.Some cracking games to come over the next few weeks. Really looking forward to this weeks matches, Ireland v Wales which are the 2 most in-form teams at present.Being Irish I think we're going to shade it by 4 points.It's such a shame...

Homework Statement An object is situated at various points relative to V. The light is then reflected by the mirror, and the final image is viewed by the observer. http://www.flickr.com/photos/55153239@N03/6196518731/ Homework Equations 1/s + 1/s' = 2/R na/s + nb/s' = (nb-na)/R...

1. Determine the acceleration of an object whose velocity is initially 24 cm/s and which accelerates uniformly through a distance of 66 cm in 3.8 seconds. 2. s = (vf + v0) / 2 * t, 3. I tried rearranging that formula but I got vf= 477.6. This just doesn't make any sense

Homework Statement a car is at a velocity of 20 km/h if the car traveled 120 km in 3 hours at constant accelration. what is the final velocity? Homework EquationsV^2=Vo^2+2ad The Attempt at a Solution I am completely confused. The book does not even list the particular formula above. And...

Hi, what do you suggest me? I prefer something relevant to energies (wind, solar etc) and to be something who i can found many info on the web to help me with my project.

The image below "gives, as a function of time t, the force component x that acts on a 2.40 kg ice block that can move only along the x axis. At t = 0, the block is moving in the positive direction of the axis, with a speed of 2.5 m/s. What is its velocity, including sign, at t = 11 s...

I'm trying to figure out what formula to get started in this question: A 7kg bowling ball moving with a velocity of 8 m/s strikes a single pin of mass 1.36kg. The impact deflects the bowling ball 10 degrees from it's original path. The pin moves along a path 45 degrees from the original path...

Problem: If 5.0 g of steam at 100 deg C interacts with 20 g of ice at 0 deg C, what is the final temperature of the resulting 25 g of water? My thinking on the solution: I figure I can use the equation delta Q = mC(delta T) to calculate the final temperature, where m = 25 g...

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...

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...

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

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...