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This isn't a math question really, and I'm really sorry if I put this in the wrong section. Still, I've been going over fluid dynamics in class and I have a question about Pascal's Law. It may be silly, but it's one that's been kinda bugging me. Pascal's Law says that any change in pressure of...

Hi! I am a 16 year old trying to figure out the application of taylor series. I understand most of its uses when applied to functions like e^x, sinx, cosx, but in a mechanics book, i am required to find delta-F, a finite change in a function F. Ostensibly, this appears to be a step that needs...

Hey there everyone. I'm working on a project and I want to incorporate a small version of Faraday's Linear Shake Flashlight. I'm stuck on how to apply Faraday's formula to the variables that I have. The formula wants "flux". How to I calculate the flux of my magnets? I know the pull...

Just out of curiosity, how many graduate schools should a person apply too? I want to enter into a Ph.D or master's program in astrophysics. So far I have a relatively decent gpa, 3.8+, 4.0 in major. Summer internship with possible future publication, & I think my recommendations are solid...

I was wondering if this is correct: \phi(k-a)=\phi(k)-\phi(a) Where k=p/h (h bar that is) and a is some constant and \phi is the Fourier transform of a wave function (momentum function). I know that if I had some real formula for \phi I could just test this but the problem isn't like...

I need a few safety schools, and most importantly a few target schools. I'll have no trouble coming up with reach schools. The problem is that I have no idea what to look for. I know I want to do Physics, but that's the extent of it. I have no idea what part of physics I'd like to do, but...

I have about 10 schools that I'm interested in but I think that may be too many and maybe I should narrow it down to like 6 or 7. Is 10 too many or should I just go ahead and apply to all of them? Would applying to 10 schools take twice as much of my time as applying to 5 or would it just take...

[Two ball of mass 60g are attached with mass less rubber thread and held in vertical position as show in figure. In this position length of rubber thread is 40cm and it is not stretched. The upper sphere is slowly raised vertically upward until the lower ball just becomes unsupported by ground...

Is that based on a 4.0gpa scale?

A 10 kg mass is in free fall with no air resistance. In order to slow the mass at a rate equal to the magnitude of g, an upward force must be applied with magnitude: F=ma F=(10kg)(9.81m/s2) = approximately 100N So in order to slow the mass at a rate equal to g it should be a...

I'm going to be entering senior year of high school this fall, and it's getting dangerously close to the time I'll need to begin sending out applications. The problem is, I'm not sure which schools to apply to. So far, my dream schools are Brown, Columbia and Williams. For some background info...

Hi all I've got one more year left in my undergraduate degree at a Canadian university in physics. I'll be taking a year off after graduating before (hopefully) going to the US for grad school in synthetic biology. My question is, should I write the GRE and apply to grad school now and then...

Hi this is my first post on here I am looking to create a large voltage across a primarily capacitive load at around 190 kHz. At the moment i have a 175 Watt power amplifier which puts out 55 Vp. The output impedance also needs to be quite low < 100 ohms Does anyone have any idea how to...

I am a senior in high school and I am taking a college class at a local community college. After this year, if I decide not to take the transfer credit, can I reject it? So I can take the course again at my new undergrad again? Like basically abandon the transfer credit and grade? Will my...

I am a bit confused as to where I should apply for my undergrad. I know I definitely want to do pure mathematics, and I am looking at schools in the US (I am not from there). I do physics, math and further math at my high school as well as some personal work in my free time... what I want to...

I'm sure this is a question that comes up a lot but I can't find an old thread on it, and I've seen a lot of varying advice all over. How many grad schools should I apply to? Personally, I'm an junior (will be a senior in the fall) physics major with a 3.9 overall and about a 3.8 in math...

I am just wondering this because I have not set on what to do for graduate school. Now if I go for theoretical physics and study Math and Physics, when it is time for me to apply to grad school, will I get to apply to a math grad school or will they not let me because my major is "theoretical...

F = dp/dt = d(mv)/dt = m(dv/dt) + v(dm/dt) = a + v(dm/dt) i don't understand why d(mv)/dt = m(dv/dt) + v(dm/dt) can somone help ? TNX !:smile:

Hi everyone, I'm a newbie in this forum :) I have some questions regarding application for graduate study and need your help. I'm currently a year 3 student and coming to final year of undergraduate life, majoring in Materials Science & Engineering. I'm considering apply for graduate schools in...

Homework Statement y' + (2/t)y = cos(t) / t^2 initial cond: y(pi) = 0 ... t>0 Homework Equations integrating factor is t^2 so.. integ (yt^2)' = integ cos (t) = yt^2 = -sin (t) + c y = ( -sin (t) /t^2 ) + c ..this brings up my first question.. when i divided through by t^2 to isolate...

Hi! I have an array that is 1 column by many rows, of which each element represents a time. I want to find variable f at each time, where f is defined as follows: if t < tp f=(sin((pi*t)/(2*tp)))^2; if tp < t < ts f=(cos((pi*(t-tp))/(2*(ts-tp))))^2; otherwise f=0 I've tried...

(to find distribution of sample mean) Given P((X1 - μ) / σ/√n) < Z < (X2 - μ) / σ/√n)) = P(a < Z < b) = phi(b) - phi(a) where phi(z) = 1/sqrt(2*pi) * integral of exp(-z^2 / 2) dz from negative infinity to z --- I'm sure there's some statistical way of doing this with a TI 89, but...

Reading about the Thermocouple: http://en.wikipedia.org/wiki/Thermocouple I came upon: "... Principle of operation Main article: Seebeck effect In 1821, the German–Estonian physicist Thomas Johann Seebeck discovered that when any conductor is subjected to a thermal gradient, it...

My physics teacher recently assigned this challenge and I have no clue where to begin. I think the ideal gas law might apply but I'm not sure. Any insight? A bottle, full of air at atmospheric pressure, whose volume is 500 cubic centimeters, is sunken mouth downwards below the surface of a...

If I draw a random curve over a scalar field, then it is not generally true that the line integral of the scalar field over the curve equals the difference between the value of the antiderivatives of the scalar field at the beginning and finishing points of the curve, as one can clearly see by...

My calculus book says sometimes derivatives can be regarded as the ratio of differentials, and sometimes they can't. Apparently, there's a similar rule for integrals. When can I think of derivatives and integrals as operations with differentials? And when can't I?

Hey guys, I'm currently a sophomore chemical engineering major and I'm looking to do an REU related to physical or organic chemistry, or chemical engineering applications. I know most people here would be math or physics or other engineering majors, but I'm just wondering if anyone who had a...

http://mail.google.com/mail/?ui=2&ik=73e979647b&view=att&th=125926df4ffe1738&attid=0.1&disp=inline&realattid=f_g25eq5it0&zw This is NOT homework. In the FBD above, there is no friction, the velocity is constant, and the distance traveled by the box is 10 m horizontally. Find the work...

Applying it to -x2 - bx +c = 0 I would have thought it to be (b +- (b2+4c)0.5) /-2 = (-b +- (b2+4c)0.5) /2 But Anytime I try and graph a function like it the roots are (b +- (b2+4c)0.5) /2 I can't see why this is? Thanks

Homework Statement A cylindrical bucket of liquid (density ρ) is rotated about its symmetry axis, which is vertical. If the angular velocity is ω, show that the pressure at a distance r from the rotation axis is P = P_0 + \frac{1}{2} \rho \omega^2 r^2 where P0 is the pressure at r = 0...

Okay, so on this last section we have been learning about friction. I'm a newby and right now we know of kinetic friction, static friction, and rolling friction. So the friction occurring when a person is walking would be kinetic right? Then when a car is braking it would be .. static? When a...

I'm having trouble understanding work. Taking an example: If I have a 1kg object and I apply a force of 1N for 1sec, It will move 1/2m and thusI will have done 1/2 (units?) of work, by the equation W=Fs. But instead, if I consider the same object now traveling at 10m/s and apply a 1N force...

I was wondering if someone could help me decide what sort of math graduate schools I should be applying to. The following is basically all the information I can think of that could affect my application. I am a senior at one of those big state universities, and I am hoping to graduate this...

I'm doing a course in PDEs, where the lecturer hasn't really explain when all these methods for solving PDEs are suitable. How do you decide which method to use to solve PDEs? Can someone explain for which class of PDEs do the following methods work: - similarity solutions - separation of...

There are theories dealing with "systems" in an abstract general way, such as dynamical system theory (graph, topological), ergodic theory, chaos theory, catastrophe theory, complex systems, ... All these theories have advanced mathematical results - mostly about existence or non-existence of...

I am trying to code a 2D rigid body physics engine in Java, and I am having some trouble figuring out how an object will move and rotate if the force is off-center. Basically, what I can't seem to figure out is a way to find out the x, y, and rotational acceleration when a force is applied at...

As a current high school senior, I am currently applying to colleges. Which universities have well developed physics programs? I live in California (ie UC system is fairly easy to get into), and am looking for those universities offering undergraduate research opportunities. Money isn't too big...

I am supposed to prove that δ'(ax) = (1/a)*(1/|a|)*δ'(x) but I cannot figure out where the (1/a) term comes from. Using the scaling theorem I know that δ(ax) = (1/|a|)*δ(x), but how does this apply to the first derivative and does it explain where the (1/a) comes from?

I'm applying to Ph.D and M.S. programs in medical physics this year, and I've noticed on some applications there is an option to fill in what other graduate schools I am applying to. Why do grad schools want this information? Would it increase my chances if I provide that information? Could it...

Hello all, Still at my frisbee modeling program, I started to ask myself how I could get better approximations of stuff like COP versus angle-of-attack, drag/lift coefficients, etc. I've been checking out the Navier-Stokes equations because I understand they can be used to model fluid flow...

I am going into my senior year in high school and I have had an unwavering interest in majoring in physics for several years. I have looked at a good number of schools, but I have a feeling that I should be looking at a few more of them and my order of preference is not fully set. The...

Homework Statement http://img38.imageshack.us/img38/7309/coil.png When the switch in the circuit is closed a current is established in the coil and the metal ring jumps upward, Why? Describe what would happen to the ring if the battery polarity were reversed? Homework Equations...

i want to apply for a master degree at the INSA de lyon [nanotechnology] i want to know is INSA is a high quality institute or not or i apply for a polytechnic Best

Homework Statement I want to know why Ampere's Law can sitll be applied/valid if the Amperian surface is drawn as a rectangle which encloses a whole solenoid. Normally the rectangle would just include one side of the solenoid. Homework Equations The Attempt at a Solution When...

Is Newton's first law included in the second law?

Is it possible or at least likely to pursue graduate study as a mechanical engineer if your bachelor's degree is in a non-engineering field? I am highly motivated and very interested in obtaining a mech. eng degree, but I am afraid that I lack the math and science pre-requisites that I imagine...

The Biot-Savart law for calculating magnetic fields due to a current is presented in my freshman physics book as a general way of getting B from I. But there's no time delay implied by the integral. Can I just manually throw the time delay into the integral? For instance, to numerically...

I know that the first law states that matter is can't be created or destroyed but in the second it mentions that the universe is moving towards entropy. But does not the universe have a moment of creation and if that is the case then what would you say the matter would have been before the...

I just got my IIT(Indian Institute of Technology) result. I qualified but i wouldn't be able to get in Mech Engineering. Meanwhile I am taking admission in BITS this coming July(Birla Institute of Technology and Sciences). BITS is a respected university in India. But i want to apply to a...

The name "phantom limb" implies an external extension of the body. Has a similar phenomenon been reported for internal organs? Thanks for any and all.