Application Definition and 998 Threads

I have just came up with the following idea which can, with the proper equipment and technology, be applied in space in order to produce immense acceleration for a specific body/bodies: STEP 1: Number of engined spacecraft s will be placed in one dimension, in equal distances from one to...

Hey all, I'm applying to grad school this fall, and I'm starting to think about my application essay. I'm going for biomedical engineering (specifically imaging), and most of the essay topics are similar (Why is this program right for you? Why do you want to study it? etc.) I just bought...

I have a problem that can't be solved. So then, I put it to this Physics Forum to see if anyone comes up with a brain storm ( or directs me to a solution which my expert may have been unaware of ). Doing Power over Fiber is "impossible" today for a broad-based residential application...

Apparently the nano laser is a key component necessary for practical application of optical computers. "Conventional lasers are limited in how small they can be made because this feedback component for photons, called an optical resonator, must be at least half the size of the wavelength of...

Homework Statement Consider the circuit shown below. (a) Determine the current reading of the ammeter. (b) Determine the voltage reading of the voltmeter. (c) Determine the power dissipated by the 500 W resistor...

Hello! I was wondering about Bethe Ansatz . From what I've read, BA applies to 1D systems of N fermionic particles. Let's say I have solved 1D problem for one particle. Now, I want to setup some boundary conditions (e.g. infinite deep well) and insert, say 3 fermionic particles and...

In two months, university application will start. So I have this little time to decide what to do. I don't think it is a possibility to do everything I want so I have to narrow it down to one. What can I do?

simple application please..o:)

Would someone be so kind as to enlighten me here? My wife and I were discussing grad school application deadlines (which are still a way off, but it's fun to daydream) and she commented on how early they were at most of the schools we were just glancing at. January 31st was a common date, or...

Anyone familiar with BarCode scanners? I have four of them I want use with my app. Can a console (custom) app be used to load/save scanned data?

HI I'm not to sure where to place this post. I'm looking for a computer application where I could plug values into get charts , bar graphs pie charts etc. I do not have very much experience in this field , but I want to play around. If you guys know of any great programs that can produce...

I have a GUI interface designed in MATLAB GUIDE Builder. It works with several MEX files that control a piece of hardware. I need to compile this into a standalone application. The deploytool's build function never compiles - it complains about the MEX files and returns: "Error executing mcc...

Homework Statement A tank in the form of a hemispherical bowl of radius 4 m is full of water. Find the work required to pump all of the water to a point 2 m above the tank. Homework Equations w = fd = mgd density = 1000L/m2 1L = 1kg The Attempt at a Solution x = height w...

I'm trying to fill in an application for a scholarship to study medical physics. The instructions are thus: My goal is to eventually run my own lab and clinic (within about 15 years time frame), but I can't think of anything to write to make it more than about 5 lines, basically just...

Homework Statement When a patient’s injured neck is healing, it is often desirable to prevent the weight of the head from pushing down on the neck. This can be accomplished with the system of pulleys shown in the figure. The pulleys are all small and extremely light in weight and have no...

Homework Statement Estimate the wavelength of a 30 keV electron. Homework Equations p = h/λ E = hf The Attempt at a Solution The electron has 30 keV of mass-energy. As it is acting as a particle-wave, E = hf, so f = E/h = 30,000x1.6x10^-19/6.3X10^-34 = 7.619x10^18 Hz Now, v =...

Homework Statement A water wave has length L moves with velocity V across body of water with depth d, then v^2=gL/2pi•tanh(2pi•d/L) A) if water is deep, show that v^2~(gL/2pi)^1/2 B) if shallow use maclairin series for tanh to show v~(gd)^1/2 Homework Equations Up above [b]3. The...

Homework Statement A linear charge lambda = 10^-11 C/m is uniformly distributed along a thin nonconductive rod of length L = 0.5 m. Use Gauss' Law to calculate the field at a distance of r = 0.1 m from the charged rod. Homework Equations ∮E.da = Q/ε_0 The Attempt at a Solution Hi...

Hey everyone! I recently picked up a motorcycle for class/work commutes because walking home at 11pm from the lab is not fun. But I have come across something of interest. Some intersections keep a green light on the main street and red on cross streets until a car pulls up. Before...

Not really a homework problem but related. In one of my homework problem, it says , Calculate the moments Mx and My and the center of mass of a lamina with density ρ = 4 and the given shape. Mx = 2 My = 12 (x, y) = (2,1/3 ) I got the answer. YOUR WELCOME. But, I only got it...

Homework Statement could someone please help me to answer the following problem: Suppose a wire 20 cm long is to be cut into two pieces. One piece is to be bent in the shape of an equatorial triangle and the other in the shape of a circle. How should the wire be cut so as to: a) maximize...

Hey all, while I've applied to several REUs for this summer, I've mostly been applying in areas that I'm only tangentially interested in. Last week, I received an email about a new REU that's opened up at Case, and was ecstatic to see the following research program: (T4) Phase transitions in the...

Hey everyone, first of all id just like to clarify this isn't a homework or coursework related problem, its part of my personal MatLab learning for future years. I obtained a nice little siganls and systems question off a friend, it looked fairly simple but I've come across a problem which i...

Any Korean here applied to MIT and got accepted? I'm applying next year and need some advice I would like to know what you guys' GPA and SAT was and what ur extra curricular (including volunteer and working) was It would be great to see what u guys wrote for your application essay

Homework Statement An ecologist studies the birds at Mai Po Nature Reserve. Only 21% of the birds are "residents", i.e. found throughout the year. The remaining birds are migrants. The ecologist suggests that the number N(t) of a certain species of migrants can be modeled by the function...

Homework Statement The monthly cost C(t) at time t of operating a certain machine in a factory can be modeled by C(t) = aebt-1 (0 < t <= 36), where t is in month and C(t) is in thousand dollars. The following table shows the values of C(t) when t = 1, 2, 3, 4. C(1) = 1.21; C(2) = 1.44...

Homework Statement A textile factory plans to install a weaving machine on 1st January 1995 to increase its production of cloth. The monthly output x (in km) of the machine, after t months, can be modeled by the function x = 100e^(-0.01t) - 65e^(-0.02t) - 35. (a)(i) In which month and...

Hi all, I have a project to do for system of ordinal differential equations and their applications in physics. One of my tasks is to find where in physics the following system of ordinal differential equations appear: dA1(x)/dx=f(x).A2(x) dA2(x)/dx=f(x).A1(x)+ h(x).A2(x)+ g(x).A3(x)...

I am looking for appliction of nuclear physics in agriculture. i have actually found that it is mostly used in Genetically modified crops. These are modified in order to allow them to resist to some change of climat or to adapt a certain region. My problem now is that i did not find used...

The 2003 Cadillac Deville is equipped with a DOHC 4.6 litre V8 engine rated at 275 horsepower. There is a lack of aftermarket support for the Northstar engine, so there are very few options i the way of performance improvements. I am of the understanding that any car can be turbocharged and...

Hello Fellow Physicists! I'm having trouble with a problem from a graduate course in Statistical Mechanics. It's a two part question; I've got the first part, it's the second part that's giving me trouble. The problem is about reversible/adiabatic processes, thinking of "reversible" as...

Homework Statement I am trying to type my assignment using latex but I am having problem. i first installed the WinEdt 5.6 and i tried typing into it and everything works except, when i press the Latex button at the top (in order to see my document whether its right or wrong) it gives an...

Hi all, When are the deadlines for PhD applications in the northern hemisphere?

I have a suspension arm that I am rebuilding, the main reason is to make it adjustable in length, and the other is to replace the ball joint. The original equipment is a standard automotive ball joint, greased and the shaft is 1 piece with the ball. The new setup would use a 5/8 spherical...

Since it appears that this is a recently discovered phenomena, it seems like there should be a lot of new applications that utilize it. Obviously the carts that use the wind to travel can move faster, but it seems like this idea can be used in other areas. I have a project for my engineering...

Aplication of the harmonic oscillator to an arbitrary number of free bosons Homework Statement I will like to know if my answer to this problem is correct and If not, what I am missing. Given a system with an arbitrary number of free bosons, where the hamiltonian for one particle with...

Should I list a publication if the paper has my name in there but I didn't actually write anything in the paper? (except producing some plots and results). Particularly when the professor just put my name there as a sort of "courtesy"? If so, how do I specify that I am not the primary author or...

I don`t know where to post this , i hope this is the right place. Colud you give me the names of windows application for math or physics.*i want just the names) , and a app to solve integrals.

Help me, I'm really confused coz the school system in the US is completely different from the one here in the UK.. watch this vid to explain what I'm saying...http://uk.youtube.com/watch?v=usq7h3n8GUw See, in the US, Students go to Universities in the age of 16...but here in the UK, when...

I am going to take GRE physics next October (or November). From what someone should begin with? Are the 1st year textbooks (like Serway's) useful, or one should study all the stuff from the advanced undergraduate texts (Griffiths' e/m, Goldstein's classical mech., Shankar's quantum mech...

Hello, my name is Mark Murphy. I've kept tabs on this forum for a while, and was hoping I might garner some advice regarding my curriculum. I am currently a third year at my university, majoring in Engineering Physics. Our Engineering Physics program differs from our Physics graduate school...

I'm having trouble with this question. The percent "P", of caffeine remaining in your bloodstream is related to the elapsed time, "t', in hours, by t = 5(log P/ log 0.5) a) How long will it take for the amount of caffeine to drop to 25% of the amount consumed? b) Suppose you drink a cup...

I don't quite understand how the modified goodman equation can be applied to a multiaxial stress state. The explanation given in my stress analysis class has been quite confusing and verbose so I've come here to see if I can't get a better understanding. First I'll lay out what I think to...

Hi. I was doing my Undergraduate Application for Current Ontario Secondary School Students (OUCA). I did Engineering Science (Physics) at UofT. But of UofT's Undergraduate physics at St.George, should it be part of "SG:Physical and Mathematical Sciences" and then Subject of Major Interest is...

[Two circular holes, one larger than the other, are cut in the side of a large water tank whose top is open to the atmosphere. Hole 1 is the larger hole, and hole 2 is the smaller hole. The center of one of these holes is located 6.61 times as far beneath the surface of the water as the other...

I'm having trouble understanding this post: https://www.physicsforums.com/showthread.php?t=81157 Specifically, part (a) (1) \frac{dV}{dt} = k - \alpha \pi \left( \frac{3a}{\pi h} \right) ^{2/3} V ^{2/3} Leaving out k, and considering a cone with no water coming in: (2)...

The ohm law for electricity is given by R = V/I Yesterday, my friend just took an experiment report to me which show the relation between R, V and I on a resistor and semiconductor separately. I saw that for resistor, R is almost a constant so V vs I is a straight line. However, for...

I've been slowly self studying Lagrangian topics, and have gotten to Noether's theorem. I've tried application of a Lorentz boost to all the terms in the Lorentz force Lagrangian (which is invariant with respect to boost since it has only four vector dot products). Then using Noether's...

Homework Statement One mole of an ideal gas does 3000 J work on its surroundings as it expands isothermally to a final pressure of 1 atm and volume 25 L. Determine a) initial volume and b) Temp of gas Homework Equations The Attempt at a Solution Well, its isothermal, so Temp is...

I've published my app... installed it... now I want to open the database the application uses. Is this possible? I'm so lost... please help!