Final Definition and 1000 Threads

Homework Statement Do you know the equation to find final position on a velocity vs time graph Plus on the same graph how do you find the distance traveled, equation wise too from 4 seconds to 15 seconds? Homework Equations No idea The Attempt at a Solution 22 meters but all...

Homework Statement A block of ice with mass 2.00kg slides 0.750m down an inclined plane that slopes downward at an angle of 36.9degrees below the horizontal. f the block of ice starts from rest, what is its final speed? You can ignore friction. Homework Equations F=ma, trig...

Homework Statement A U shaped container containing Hg at rest. 11.2 cm of water is added to the right side of container. How much does the Hg rise? Homework Equations p = p + \rhogh The Attempt at a Solution

Homework Statement A block of ice with mass 2.00kg slides 0.70m down an inclined plane that slopes downward at an angle of 30degrees below the horizontal. If the block of ice starts from rest, what is its final speed? Homework Equations W = 1/2(m)(v2)^2 - 1/2(m)(v1)^2 The Attempt at a...

When the Sun burns out entirely and reaches the ambient temperature of outer space, what will be its radius, mass, and composition? What would we call such a thing?

"Calculate the initial diameter of a wire that has been longitudinally strained by 30% and whose final diameter is 0.1cm. Assume no volume change." Now I know that if there is no volume change, v=poisson's ratio= 0.5. Thus the lateral strain would equal 30%*0.5= 15%. But when I plug it...

Hi guys, I'm a final year Electrical Engineering student need help from you guys. my project is to build a system that will help the student to know their final semester result via sms. it designed using Microsoft Access for its database and Microsoft Visual Basic 6.0 as interface. my...

Homework Statement An object of mass M begins with a velocity of 0 m/s at a point. A power input of P watts goes directly to kinetic energy until the object has traveled a distance of X meters. What is the final velocity of the object? So, we have constant variables M = mass X = distance...

Normaly what do undergraduate physics students do in their final year report or thesis? 1. Create new theories? Unlikely but not impossible. 2. Simulation? What do they simulate and what computer programe do they use? Thanks.

Hey friends from the phyics forum... I have been recently struggling with physics I all semester... and now I am already to the Final Exam which is 50 questions - multiple choice and it is worth 50 % of my grade. Which to me is like basically passing or failing the class and having to repeat it...

Homework Statement 80 kg astronaut carrying a 20kg tool kit is initially drifting toward a stationary space shuttle with a speed of 2 m/s. If sh throws the tool ki toward the shuttle with a speed of 6 m/s as seen from the shuttle, her final speed is? Homework Equations If it is seen from...

Homework Statement given the wavelength of photon absorbed by H atom and wavelength of photon emitted by that H, find the final "n" state of H atom. Homework Equations E=nhf The Attempt at a Solution I tried... n1hf1=n2hf2 n1f1=n2f2 where n1=1 so: f1=n2f2...

Homework Statement The drawing shows an adiabatically isolated cylinder that is divided initially into two identical parts by an adiabatic partition. Both sides contain one mole of a monatomic ideal gas (), with the initial temperature being 523 K on the left and 287 K on the right. The...

Homework Statement How does one use the equations for the conservation of momentum and energy (see my last post in this forum) cp' = cp +\hbar(\omega+\omega') E' = E +\hbar(\omega-\omega') to derive the following cp = -(\hbar\omega + \hbar\omega')/2 +...

I don't remember the question verbatim, but here is all the info Homework Statement There is a mass attached to a rope which is attached to a pole. It is set to rotate on a horizontal surface (basic circular motion scenario). There is no kinetic friction along the table, but there is...

Physics Final Tomorrow PLEASE CAN SOME ONE HELP~! Hello everyone i have been trying to understand physics for the past week and i haven't been able to get any tutors all of them are booked. so i have my practice test that the teacher has given us and i was wonderin if anyone could help me out...

Homework Statement A bottle is thrown with an initial velocity of 4 m/s at 45 degree angle from the horizon. Find its final horizontal and vertical velocities before striking the ocean. Homework Equations change x= innitial velocity (t) + a(t squared) final velocity= innitial velocity...

Homework Statement If you have an object, say, falling off a cliff and you have initial velocity (Vox) can you assume that its Vf would be zero in both x and y if it doesn't state or ask for a final velocity before impact? eg) a car drives off a cliff and the site of impact is 32 m from...

Another big turnout in the first round voting. Ok, I have listed the pictures with the most votes from the preliminary round. You must now choose your favorite picture from the finalists. Please vote for the photo that best represents our theme, which is flowers. 1. Astronuc...

If the speed of a car is increased by 75%, by what factor will its minimum braking distance be increased, assuming all else is the same I am not sure what formulas i should use for this problem. Am i souposed to use the formula for Final velocity which is Velocity Final^2=...

Homework Statement 1) In a sequential process, U(235,92) plus a neutron forms the compound nucleus [U(236,92)]* which then fissions; the fissions then produces decays. If the initial fission fragments are Ba(143,56) and Kr(90,36), illustrate a process leading to the final stable nuclei...

Two 800\; cm^3 containers hold identical amounts of a monatomic gas at 20^\circ C. Container A is rigid. Container B has a 100\; cm^2 piston with a mass of 10 kg that can slide up and down vertically without friction. Both containers are placed on identical heaters and heated for equal amounts...

I have an airsoft gun that i am trying to find the acceleration for Initial Velocity=0 Final Velocity= 106.68 m/s Distance Traveled=.762meters Is there any way i can find the acceleration with that information, i have no way to find an accurate time.

Homework Statement Final round I promise! Is there some sort of trick that can be applied to the following equation so that it is easier to process? \frac{dy}{dt}=\frac{1}{t+y},\:y(-1)=0 The Attempt at a Solution Somebody told me that the equation can be made easier by...

Homework Statement One mole of a perfect gas with molar heat capacity at constant volume, CV = 20.8 J K-1mole-1 is initially at 310 K and 3.25 x 105 Pa. It then expands adiabatically until it reaches a pressure of 2.50 x 105 Pa. Calculate the final temperature and volume, and the work done...

Homework Statement http://img225.imageshack.us/img225/3338/question10em4.jpg Homework Equations This is a practice question for final exam, I very much appreciate if someone can help.

Homework Statement A 0.011 kg cube of ice at 0.0 degrees Celsius is added to 0.450 kg of soup at 80.0 degrees Celsius. Assuming that the soup has the same specific heat capacity as water, find the final temperature of the soup after the ice has melted. (Hint: There is a temperature change...

This is the final round of voting for our Nightlight contest. Please vote for the photo that best represents our theme, which is lighted pictures at night. 1. robphy http://img207.imageshack.us/img207/4963/albuquerquenmroute66sm0.jpg 2. J77...

Homework Statement A proton is accelerated from rest through a potential difference of 107 V. Calculate the final speed of this proton. Homework Equations I'm not really sure which equations to use, but I figured I give all I tried... V=-Ed V=PE/q PE=-qEd and I think this...

I have this physics question i need help with. An M gram chunk of hot iron is placed on a large piece of 0 degrees celsius ice, causing m grams of ice to melt. a. What will be the final temperature of the system? b. What must have been the initial temperature of the cold iron? c. What...

I can't think of a way to "show that y=...". Do I compare to x values? Thx

A flat uniform circular disk (radius = 4.69 m, mass = 280 kg) is initially stationary. The disk is free to rotate in the horizontal plane about a frictionless axis perpendicular to the center of the disk. A 55.0-kg person, standing 1.59 m from the axis, begins to run on the disk in a circular...

For processes of particle decay and inelastic scattering, quantum field theory (QFT) predicts well the probabilities of various final states for given initial states. Technically, this is described by the S-matrix, which is the unitary-evolution matrix describing the transitions from t=-infinity...

Homework Statement A hydrogen atom in an excited state emits a photon of wavelength 95nm. What are the initial and final states of the hydrogen atom? [Hint: you will need to make a reasonable guess of what is the final state. look at the energy of the photon and compare this energy with all...

This is the dreaded final round. It will be a difficult one. Good luck to everyone! Please vote for the picture that best represents our theme: the color GREEN. 1. SpaceTiger http://www.astroskwurl.net/PF/Green.jpg 2. Janus...

I think I may have posted this in the wrong forum earlier :\ Homework Statement An insulated and initially empty 0.7m^3 tank is connected by a valve to a line flowing air at 50degreesC and 200kPa. The valve is opened until the tank is filled, and then the valve is closed. The insulation is...

Homework Statement An insulated and initially empty 0.7m^3 tank is connected by a valve to a line flowing air at 50degreesC and 200kPa. The valve is opened until the tank is filled, and then the valve is closed. The insulation is then removed from the tank, and a 20degreeC heat sink cools the...

This is going to be another difficult final round of voting. So good luck to everyone, and well done! 1. turbo-1 http://img120.imageshack.us/img120/2898/sunsetnov17jv3.jpg 2. hypnagogue http://img177.imageshack.us/img177/9495/sunsetlg8.jpg 3. matthyaouw 4. larkspur 5...

For this project, I need about 10 input as buttons and each input produce different output. Its output is the playback of audio message which is being record in the ISD Chip. I plan to use ISD2590P chips which will be able to record of about 90second only, which is more enought for me. I will...

This promises to be a brutal final round. Good luck to all finalists, and good luck to the rest of us who have to choose just one. Please vote for the picture that best represents our theme: Mountains! 1. cyrusabdollahi http://img254.imageshack.us/img254/7818/iranvp8.jpg 2. Integral...

This promises to be an impossible contest to vote. Still, do your best to pick the picture that best represents our theme : black and while photo. 1. Janus http://home.earthlink.net/~parvey/sitebuildercontent/sitebuilderpictures/beach.jpg 2. alex caps...

Okay, so I've been working on an extended practical investigation. And I am a little stuck. Heres a brief overview: Using a ramp(always at the same angle to the horizontal), and a truck and a stopwatch, I've timed the amount of time it takes for the truck to reach the bottom of the ramp, with...

Its me again. I need recommendations for a motor and power supply to make a cordless grass trimer that uses battery..anyone?

Homework Statement An object is placed 6 metres from a convex lens of focal length 30cm. A concave lens of focal length 5cm is then placed 20 cm from the concave lens, on the side distant from the object. Determine the position, magnification and nature of the final image formed (to solve...

This promises to be a tough final round for this contest. Please vote for the picture that best represents our theme this week, which is all about leaves! 1. Janus http://home.earthlink.net/~parvey/sitebuildercontent/sitebuilderpictures/fall.jpg 2. Moonbear...

there are 2 part for this problem I got the part one but i didnt get another one so helpppp please... 1)A 44.4 kg box initially at rest is pushed 5.3m along a rough, horizontal floor with a constant applied horizonta force of 181.646N. The acceleration of gravity is 9.8 m/s2. If the...

This is going to be a very difficult final round, so good luck to everyone. Please vote for the picture that best represents out theme, which is things that are straight and narrow. 1. turbo-1 http://img262.imageshack.us/img262/4175/wirebridgepy3.jpg 2. twisting_edge 3...

for this project is to helps the blind people in making a call. Each key when pressed produce a audio sound of the number pressed. To confirm the digits pressed is correct an additional key should repeat all the digits pressed in audio. Can anyone give me any information or comment on this...

Alright, I have a Physics Final exam coming up and I'm worried about it. How do you guys go about studying for everything from a whole semester? Should I just review all of the equations and clear up what each one means? Should I practice all of the problems at least a few times? What should I...

This final round promises to be a tough one. Congratulations to all who have made it this far. Please vote for the picture that best represents out theme, which is snow. 1. BobG http://img71.imageshack.us/img71/4859/9272006005ez4.jpg 2. GeoMike http://www.mcschell.com/snowytrail.jpg...