Final Definition and 1000 Threads

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.

Hi. I'm having incredible difficulty on my homework (2 problems left that are due tomorrow)for my physical science class. My professor is kind of making us rely on ourselves to learn this stuff. This is the first collegiate class I've taken that has actually made me feel stupid. The syllabus...

http://daysnews.net/9676-discovery-shuttle-poised-for-historic-final-launch.html" What a great accomplishment. Good Luck Discovery.

Homework Statement A cliff diver runs horizontally at 4.00 m/s. He hits the water 3.00 s later. Ignore air resistance. (a) What is the diver's speed (magnitude of the velocity vector) just before he hits the water? Homework Equations Change in y-component: y(t) = v[SIZE="1"]yot + (1/2)g(t^2)...

Homework Statement A man stands on the roof of a 10.0 m -tall building and throws a rock with a velocity of magnitude 24.0 m/s at an angle of 30.0 degrees above the horizontal. You can ignore air resistance. Calculate the magnitude of the velocity of the rock just before it strikes the ground...

Homework Statement A dynamite blast at a quarry launches a chunk of rock straight upward, and 2.1 s later it is rising at a speed of 19 m/s. Assuming air resistance has no effect on the rock, calculate its speed at (a) at launch and (b) 5.2 s after the launch. Homework Equations v = v0 +...

I'm a junior so all the grades in the 3rd marking period get put on my transcript (it's the 3rd marking period right now). I asked my teacher what I got for my final and she said "Very bad. You got a 39. That's not good! I thought you were a good student." I told her that I thought did well. I...

Homework Statement A space vehicle traveling at a velocity of 1200ms -1 separates by a controlled explosion into two sections of mass 865kg and 2010 kg. The two parts carry on in the same direction with the heavier rear section moving 120 ms -1 slower than the lighter front section...

Homework Statement a 40kg duck walks from the outside to the inside of a rotating circular table of mass 100kg. if the rotational intertia of the table is 250kg*m^2 and the duck moves from a radius of 2.5m to 1.5m, find the final angular speed of the table if it rotates at 2.0rad/sec at the...

Homework Statement A 10-kg block of ice has a temperature of -12°C. The pressure is one atmosphere. The block absorbs 4.15 106J of heat. What is the final temperature of the liquid water? Homework Equations Q=mcT The Attempt at a Solution i know i have to find the change from...

Having dealt with all the important matters of the economy, living standards and national security - and having decided that dealing with an inability to win at ice hockey is unsolvable - the Canadian government has finally stamped down on those wreckers of society. Dire Straits have been...

I cannot for the love of god figure out to do this projectile motion problem, the first problem on this practice exam. Our professor for whatever reason decided not to give a solution page. Somebody PLEASE explain the first problem to me...and if youre feeling brave itd be nice if you could do a...

Homework Statement A 10 kg piece of zinc at 68◦C is placed in a container of water. The water had a mass of 32 kg and a temperature of 14◦C before the zinc was added. The specific heat of zinc and water are 388 J/kg ·◦C and 4180 J/kg ·◦C. What is the final temperature of water and zinc? Answer...

1. Homework Statement How much work does it take to construct a conducting sphere of radius 'a' and charge '+q' by pulling charges ('dq') from an infinite distance? Then construct another conducting sphere of radius 'b' and charge '-q' around the sphere of radius 'a'. Given 'a'<'b'. 2...

Hi, I'm studying for my final exam in Physics tomorrow (doing a review packet) but I keep forgetting the equation/formula needed to find final velocity (not the one with the distance, but the one with time). I don't have most of my notes as my teacher keeps folders of our work and notes at...

I'm just curious what you think of it. Easy? Average? Difficult? http://i111.photobucket.com/albums/n149/camarolt4z28/IMG_20101212_192514.jpg?t=1292203747

Hi. Is there any advice you can give as to how to go about this. Things I need to make sure I do, what not to do, writing style etc etc. Should I follow the exact outline of a reputable paper I have acess to ? If your interested I have to make a phantom with simillar charcteristics to breast...

Homework Statement Suppose you have a 24 ounce mug of soda (treat as water) at room temperature, which is 22 C. Warm soda tastes bad, so you add 125 g of ice at -25 C to the soda. What is the temperature (in C) of the soda once all the ice melts and the solution reaches a uniform temperature...

Homework Statement It gives the mass, energy gained (change in energy), initial velocity and power and time I　need to find final velocity Homework Equations EK= 0.5mv^2 The Attempt at a Solution I was thinking of plug in the number into above formula but if i do this i won't be...

Homework Statement I'm trying to understand algebraically how the solution was arrived at for the following problem. Automobile tire at normal atmosphere at 10 deg C. Inflating the tire to 28% of original volume with an increase in temp to 40 deg C What is the pressure? Homework...

Homework Statement A rotation wheel required 3.0 s to complete 37 revolutions. its angular speed at the end of the 3.0 s interval is 98 rad/s. what was the original angular speed of the wheel? Homework Equations average omega = change in angle/change in time The Attempt at a...