Applications Definition and 627 Threads

hello friends, in my course "introductory QM" it says at the end of harmonic oscillator chapter that this may find some applicasions in electromagnetic fields and in crystal physics. now, though i haven't covered solid state physics yet, but still i can...

Hi, I´m preparing a paper on ARPES and wanted ask what the main applications of ARPES are nowadays? I allready understand that high temperature superconductors are one main region of interest but what else ? Thanks

Just curious, are there any?

Homework Statement 8. (II) A car can decelrate at -4.80 m/s^2 without skidding when coming to rest on a level road. What would its decelration be if the road were inclined at 13 degrees uphill? Assume the same static friction force. Homework Equations Ffr = MuFn F = ma The...

Homework Statement 1. A cylindrical gasoline tank 3 feet in diameter and 4 feet long is carried on hte back of a truck and is used to fuel tractors. The axis of the tank is horizontal. Find the work done in pumping the entire contents of the fuel tank into a tract if the opening on the...

Homework Statement Find the acceleration of the masses based on the figure below. m1 = 1kg m2 = 2kg m3 = 3kg Homework Equations - The Attempt at a Solution I am completely lost, I've tried thinking and thinking over and over again about this problem, wouldn't the...

Hi all I've been reading about Berry's Phase, but none of my litterature has explained, if Berry's Phase can be used to something, i.e. if it has any real applications?

Homework Statement At an airport, you pull a 18-kg suitcase across the floor with a strap that is at 45 degrees above the horizontal. Find the normal force and the tension on the strap, given that the suitcase moves with a constant speed and the coefficient of kinetic friction is 0.38...

Hello everyone, It's that time of the year... Applying for grad school, taking GREs and all that business and honestly I am freaking out. Currently waiting right now to get my PGRE scores back but it's starting to bug me and I could use a bit of persuasion that scores aren't all that. So...

Homework Statement A 1380kg car is moving due east with an initial speed of 27 m/s . after 8.00s the car has slowed down to 17.0 m/s . Find the magnitude and direction of the net force that produces the deceleration Homework Equations Net force of x= MAx Net force of y= MAy The...

First Demonstration Of A Working Invisibility Cloak ScienceDaily (Oct. 19, 2006) — A team led by scientists at Duke University's Pratt School of Engineering has demonstrated the first working "invisibility cloak." The cloak deflects microwave beams so they flow around a "hidden" object inside...

I would like to create some type of physics oriented software as a hobby but I know there is already a lot of software out there. Does anyone have any suggestions as to a simulation of a situation/concept that they thought would be useful but have been unable to find in other software? (at...

A fisherman is fishing from a bridge and is using a "32.0-N test line." In other words, the line will sustain a maximum force of 32.0 N without breaking. What is the weight of the heaviest fish that can be pulled up vertically, when the line is reeled in with an acceleration whose magnitude is...

A toboggan slides down a hill and has a constant velocity. The angle of the hill is 8.80 with respect to the horizontal. What is the coefficient of kinetic frction between the surcae of the hill and the toboggan? So i used the formula: sum of forces(x)= cos (8.80)=0.98823 Forces (y)=...

Box 1 is resting on the table with box 2 resting on top of box 1. a massless rope passes over a massless, frictionless pulley. One end of the rope is connected to box and the other end is connected to box 3. The weights of the three boxes are w1=55.0N, W2=25.7N. Determine the mangitude of the...

A supertanker with the mass of 1.72 *10^8 kg is moving with a constant velocity. Its engines generate a forward thrust of 5.52*10^4 N. Determine (a) the magnitude of the resistive force exerted on the tanker by the water and (b) the magnitude of the upward buoyant force exerted on the tanker by...

I know there's PortableApps.com and U3. What other ones are there? What's the best?

I come from India and I intend to apply for undergraduate admissions this year for a physics course [BSc. Physics]. I am preparing for the IIT-JEE, although I know quite well that I am NOT going to be doing engineering; I want to do physics. Inside of India, I know of the choice of applying...

1. In the drawing, the weight of the block on the table is 388 N and that of the hanging block is 175 N. Ignore all frictional effects, and assuming the pulley and the cord to be massless. Find the acceleration of the two blocks as well as the tension in the cord 2. Fnet = mass of the...

Homework Statement At the airport, you pull a 18-kg suitcase across the floor with a strap that is at an angle of 45 deg above the horizontal. Find a) Normal force and b) the tension in the strap, given that the suitcase moves with constant speed and that the coefficient of kinetic...

Homework Statement A speedboat starts from rest and accelerates at +2.01 m/s2 for 6.55 s. At the end of this time, the boat continues for an additional 6.45 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.80 s. Find the total displacement of...

Are the simple uniform rates problems practical for anything other than for applications like inlet and outlet pipes filling or draining a reservoir? The kind I mean are the ones which immediately yield rational equations immediately upon first analysis. We find motion problems, we find...

Homework Statement A current-to-voltage converter The current source has a finite output resistances Rs, and the op-amp has a finite open-loop differential gain Aod. Show that the input resistance is given by Homework Equations Rin = RF/(1+Aod) The Attempt at a Solution Rin = RF...

Would someone care to explain some basic applications of Partial Derivation in real-world situations? (Note: This is NOT a homework question; it's just a query.)

I would like to know what are the prequisites for a graduate course with a handle "supergeometry and applications in physics", Iv'e read somewhere that it uses a lot of algebraic geometry, schemes, I guess that after the lecturer will publish the syllabus with the prequisites, I'll be wiser...

Hello, I am looking at companies for my second year internship as a CompSci undergraduate, specifically I am thinking of Artificial Intelligence/Data Mining/Natural Langauge Processing. I would be grateful for any tips on commercial companies that carry out some work in this field, as it...

In the following diagram: http://www.st-andrews.ac.uk/~www_pa/Scots_Guide/experiment/lab/expt2/rc.gif; I believe it is a Low-pass filter. But within the picture, does current come in from both-top/bottom left portion of the wires, and exit the top/bottom right portion of the wires? In another...

Homework Statement A ball of mass 1 kg is acted upon by three forces: Fl = (2i + 4j - 3k) N, F2 = (-3i - j + 2k) Nand F3 = (i - 5j - k) N. Determine a vector expression for the acceleration of the particle. If, at time t = 0, it has position r = (i +j) m and velocity u = (i +3j)m/s...

One application I can think of is that if I had an incurable disease I could go on a one week ride in a spaceship, on return 50 years have passed on earth. Of course if there wasn't a cure I could just go on another trip.

Hello, I'm trying to start my first job/career and I don't have much professionalism experiences. I'm wondering if sending job applications on a Saturday and/or Sunday will be acceptable or I should delay sending applications till Monday as a better option. Thank you for your help.

Statement: Capacitors can be used to store energy or to filter signals. Some examples include filtering out AC [used to reduce the "ripple" of a DC power supply] or filtering out a DC. In filtering out a DC, only time-varying signal will pass through a capacitor. The circuit on either side...

Statement Capacitors can be used to store energy or to filter signals. Example, filtering out AC is used to reduce the "ripple" of a DC power supply. Also Filtering out DC: Only time-varying signal will pass through a capacitor. The circuit on either side of the capacitor can be at different...

Hey, I'm searching for a job in the environmental field these days. I have started my search recently and don't have much experience about professional norms in the work place -- I'm trying to get my first job after college. I'm wondering if I complete my job application 10 days or two weeks...

Hello everybody... i want a book that talks about some clever applications and problems in the fundamentals of physics >> >> also i want a book that take the famous concepts of physics and prove it or justify it clearly with pictures , mathematical proofs, clever...

Homework Statement following from this post; https://www.physicsforums.com/showthread.php?t=312075", I would like to know why people generally think the Differential Eigenvalue Problem is interesting? eg why is there a fair amount of current research into this? Homework Equations...

hey I am 16, grade 12 in australia, struggling on the hardest question on the current maths assignment. i was wondering if someone could point me in the right direction? i really have no idea where to start. and no one i seem to ask has any useful info. Homework Statement...

Hello! I'm new to the forum and quite interested in the wealth of information and exchanges that seem to go on here. I found my way here a couple of times before looking for some information on other experiments, but was too lazy to register, lol. At any rate my query is related to the...

What are linear inequalities actually used for?

What are some applications of abstarct algebra? I have to write a paper and present on a application of abstract algebra and am looking for topic ideas.

If we can describe the quantum state through Schrödinger equation, we can calculate the observables of the hydrogen atom. Can we do this for other elements, like U238? Or does this have to do with quantum many body problem. I looked up analytical solutions for schrodingers equation and it is...

Hi, I just finished up a Complex Analysis course last term and, though I'm no physics major, I thought Quantum Physics looked interesting. Does anyone know some common or interesting applications of Complex Analysis within Quantum Physics? Or even an online resource that might delve into...

Hi all, I've applied to about 10 Physics internship programs (8 REU's, DoE's SULI, and NASA's USRP), and I haven't heard from any of them yet. Has anyone heard from any yet/ does anyone know when the letters go out?

Homework Statement A research studied the commercial fishing situation in a certain fishing zone. Denoting the total catch of corel fish in that zone in t years time from January 1, 1992 by N(t) (in thousand tonnes), he obtained the following data: t=2, N(t)=55 t=4, N(t)=98 The...

Homework Statement A vehicle tunnel company wants to raise the tunnel fees. An expert predicts that after the increase in the tunnel fees, the number of vehicles passing through the tunnel each day will drop drastically in the first week and on the t-th day after the first week, the number...

This is a question that got me thinking, but no further! Hence why I ask it here: Does anyone know of any mathematics that DOESN'T have practical applications? By practical I mean physical, real world applications.

Hello, I'm a Mechanical Engineering grad student (got my B.S. in ME as well) and I've started applying for jobs. I've heard that it's a good idea to call the company after sending them a job application but I just can't think of what I'm suppose to say. Do any engineers in the workforce has...

I worked full-time (upto 47hrs/week) while completing my undergraduate degree in Physics (basically to support myself). On the negative side, I've had to forgo any research experience while focusing all my effort to keep up with my full course load. On the positive side, I have no student...

Hey guys, I was wondering about what a graph would look like where the power to a did not increase at a linear rate i.e a^(x^x) Is there such a recognised function as this? If so does it have any practical applications and what does the graph look like? Thanks, Oscar

Text: Fundamentals of Complex Analysis With Applications to Engineering and Science by E.B. Saff and A.D. Snider I only ordered my textbook last week (yeah... I know), so I don't think it will get to me before my homework is due. Would some kind soul with this book please post these questions...

The Fibonacci numbers seem intimately connected with geometry. Prime numbers appear to avoid geometrics, however. Can you give some counterexamples of this latter statement?