Term Definition and 742 Threads

Hello everyone! Could you please help me with choosing the correct term? The situation is as follows: A reactor generates energy throughtout the core life and it is measured in MW h. What would you call this characteristic that is measured in MW h? If translated from Russian (I'm...

Hi, If I have three light quark flavours with massses m_u, m_d,m_s , I want to try and calcuate the masses of the eight pseudogoldstone bosons. I have found from my mass term in the Chiral L that: L_{mass}=-2v^3...

Using dimensional regularization we frequently end up with a term 2/(4-d)+ ln(somthing with mass dimension), c.f. Peskin page 250~251, and Peskin said the scale of the logarithm is hidden in the 2/(4-d) term. How is this so? No matter how hard I try to look at 2/(4-d), I see a purely...

Hot and fresh off the press! It claims 1-2 joints a week does not harm the lungs long term. If anything, I think this reaffirms the call for balance in life. A drink or smoke a week won't kill you, but don't binge with either. What are your thoughts on the studies results? Association...

yo ok progress on the electromagnetic wave front is progressing nicely...finally, but i have stumbled on a area that i need some help with. see below when maxwell took amperes law, he added what's known locally ! as the current term, this was done because he realized that a changing...

If I know generating function of a series, what formula gives nth term? Specifically, my generating function is f(x)=(Ʃ(k=1, to m-1) x^k)/(1-x^m) ***The function represent series: 0,1,1,...,1,0,1,1,...,1,0,... where m is period; i.e. 0,1,1,0,1,1,0 m=3***

Please can someone gives its definition or explain what it means?? I have searched everywhere but without luck. thanks a lot.

The speed of light, the term "light year", and reference frames. Hi everyone. This is my first post, and I post out of desperation. A friend of mine and I were casually discussing Time Dilation, interstellar travel, etc. when we came to a point we fundamentally disagreed upon. Neither of us...

Hi, I am not sure it is the right subcategory to post a question on statistical physics. But anyway, I read a couple of times that adding a m^3 to the Landau free energy implies that we may observe a first order transition phase, but I don't see why. Maybe it does imply some discontinuity in...

Hi, i am evaluating the integral \int_{-\infty}^{+\infty}dE \langle p'|E \rangle \langle E| e^{-iEt/ \hbar} |p\rangle However, i am unsure how to evaluate \langle E| e^{-iEt/ \hbar} |p\rangle . I am not sure if it is simply e^{-iEt/ \hbar} \times \langle E|p\rangle or something else. Any...

Homework Statement The sum of an infinite geometric sequence is 131/2, and the sum of the first three terms is 13. Find the first term. Homework Equations S∞ = a/(1-r) Sn = a-arn/(1-r) The Attempt at a Solution a/(1-r) = 131/2 a-ar3/(1-r) = 13 2a = 27-27r ...... 1 a-ar3 =...

Our 8th grade math counts team met today and I didnt know how to do this problem: The first three terms of an arithmetic sequence are p, 2p+6, and 5p-12. What is the 4th term of this sequence? Please explain how to do this. Arigato!

Hello all, How exactly do you all cope with getting sick during a school term? For example, if you were to have a flu? Do you continue studying, or do you take a break to get well? I have been doing absolutely nothing these last two days because my head won't let me. I did however finish a math...

The relativistic relativistic energy–momentum relationship is: E^2 = \left(pc\right)^2 + \left(m_0c^2\right)^2 The relativistic energy (for a mass) is: E = \gamma m_0c^2 It has been said that the curvature of space is contributed to by photons, not just mass. However: The curvature of...

Hello, I'm working of the Boltzmann equation to simulate a partially ionized plasma, but I'm having troubles to solve the collision term. I'm using a splitting technique for the advection in the phase-space, but I'm quite stuck in the collision term. Any recommendations?

Homework Statement i added a photo of a move of limit of function. can anyone please explain this move ? step by step.. i can't understand it thanks in advance ! Homework Equations The Attempt at a Solution

Hello, suppose I have a set of sentences Ʃ from the language of number theory ( the usual one ). Then, I extend this to a maximally consistent set of sentences Ʃ' and create a henkin term structure for it ( i.e. as in the popular proof of the completeness theorem ). Can it be true that this...

Hi, I'm currently taking a Discrete Mathematics class and cannot seem to work out this one problem, we need to find the x^10 term in order to determine its coefficient of the equation f(x)=(x+x^2+x^3+x^4+x^5+x^6)^3 I know the answer is to be 27 from a previous problem (we are to use this method...

Homework Statement Solve the following differential equation for q(t) (position): q''-qω^2 = C, where C is a time-independant value (basically a constant)The Attempt at a Solution This equation is not homogeneous, therefore it must be non-homogeneous. However, in every definition of...

If I have log a b = c, what is the term for the value b? I know that a is the base and c is the exponent, but I can't think of what b is called! While I am at it, in ab = c, what exactly is c called? The power? Would that make b from the previous example the power as well? I have a...

I am reading about the recovery of some classical rules from quantum mechanics. My text (Shankar) considers a Hamiltonian operator in a one-dimensional space H = P^2 / 2m + V(X) where P and X are the momentum and position operators respectively. It then asserts that [X,H] = [X,P^2/2m]...

This is one of those things (too many of them) that I have been thinking about... Ever since I school I have always wanted to move to some other country that is more populous, and eventful. At the same time I have been trying to form relationships. I feel like it is probably inappropriate to...

Hello Forum, I'm reading a paper on the low-lying electronic states of Mn and can't quite figure out the notation. For example, we are told the [Ar]3d54s2 lowest energy configuration gives rise to a 'a 6S5/2' ground state. I understand that the 6S5/2 in terms of the (2S+1)L(J)...

We often here the term in thermodynamics that a particular phase change is of 1st order , second order . What does the word order imply

Homework Statement The general term is given by 3r+1+(-1)r+1 So by substituting r=0,1,2,3... I get a sequence like this: 0, 5, 6, 11, 12, 17, 18... It seems to form some pattern. So i wonder, can i deduce the general term with only the sequence? How? Please kindly elaborate more...

I did a search and http://www.google.com/#hl=en&sugexp=gsis%2Ci18n%3Dtrue&cp=3&gs_id=p&xhr=t&q=Yurt+Living&pf=p&sclient=psy&source=hp&pbx=1&oq=Yur+Living&aq=0c&aqi=g-c4g-b1&aql=&gs_sm=&gs_upl=&bav=on.2,or.r_gc.r_pw.&fp=d93d9db53c2df948&biw=1016&bih=570" came up virgin, for PF at least, does...

Homework Statement express as a single term: 1/2x+1 - x/x-1 Homework Equations it says to bring to a common denominator The Attempt at a Solution I think I should take out an x-1 but I forget where to go from there. I will be posting a lot of questions this is a review for my...

Homework Statement 1. for the surface z=9 - x^2 - y^2 find, i) the gradient at (1,1,7) in the direction making an angle alpha with the x-axis ii) the max gradient at the point (1,1,7) and the value of alpha for which it occurs 2. find the stationary point of z=x^2 +2x +3y^2 -3xy + 5...

Homework Statement how am i suppose to expand (X-4)2/3 The Attempt at a Solution i don't have any idea :( any help? thanks!

Homework Statement Find the long-term behavior of the Markov system described by the following matrix with initial conditions below: (i.e. find T^infinity) Find x_infinity Homework Equations x_0 = [.3 .3 .4]^TT = [.5 .4 .1] [.4 .3 .3] [.1 .3 .6] The Attempt at a Solution So in my...

Hi could someone please explain the story (if there is one) about the Dirac equation with an anomalous magnetic moment term, I have seen this in several old papers but it never seems to be mentioned in textbooks. Was this an old confusion in formulating QFT. In this context I believe the Dirac...

I'm writing sort of a introduction doc for my co-worker... there is certain pins should be connected by a jumper to keep the hardware in certain state, so can I say something like: "Ensure that UP2 & UP4 is shortfused by the jumper prior to entering the debug mode"? As you people can see, I...

Homework Statement Find a formula for the nth term that determines each sequence. Homework Equations The Attempt at a Solution c) 6, 5, 4, 3 I said this one was n-1 , but apparently its 7-n . can't it be both? How the heck do you tell which one it is? f) -3, -6, -12...

The first law of thermodynamics dU=dQ-dW could be expanded to dU=TdS-PdV where U is internal energy, T is temperature, S is entropy, P is pressure, and V is volume. I am trying to understand the terms one by one in plain English. So: V is how big the container is...

Hi, I was wondering if the following statement is correct: \int(\frac{du}{dx})^{2}dV=\int\frac{du}{dx}dV\int\frac{du}{dx}dV Please help! Thanks!

Homework Statement consider the initial value problem (1-x)y,,+xy,-2y=0 find the series solution up to the term with x6 Homework Equations (1-x)y,,+xy,-2y=0 The Attempt at a Solution assuming the answer has the form \Sigmaanxn that gives y,,=\Sigmananxn-1 and...

Homework Statement Find a linear transofmration from X={x1,x2,x3} to U={u1,u2,u3} which will remove the cross product term in the quadratic form of equation 2X12+4X22+5X32-4X1X3 and thus write the resulting quadratic form in u1,u2,u3. Homework Equations The Attempt at a Solution No...

Can someone explain what the difference is between the expectation value of an observable in a pure vs a mixed state. The equations are identical. For example with spin up and down |A|^2<S_u|O|S_u> + |B|^2<S_d|O|S_d>

Hey guys, I have to write a term paper over the summer long semester in a University Physics class. I'm completely overwhelmed with topics, and have no clue of what might be too general of a topic as this is my first physics class ever! Of course, we have to use library databases and...

Well...I am an engineering major who decided to take more math classes last spring term to prepare myself for the possibility of engineering grad school. Just got back my spring term grades and it was an absolute shock. I used to average near an A- but my grade point average dove by 0.19...

I am currently reading and trying to solve most of the problems in Carroll's Geometry and Spacetime. I am generally okay at the math (I've done some mathy Riemannian Geometry type stuff), but am not overly good at some of the higher-level physics. Homework Statement (Chapter 1, Question 13)...

I want somebody to help me what attempts have been made to understand the sequence of prime number. Is the Nth term of the sequence disclosed?

electronics question Define the term “Speed” as employed in rotating machines, and state its (S.I) units. anyone know the answer? is it rad per second?

If you want to! I had to make this topic, because I have been waiting for grades for the last week, checking incessantly each and every day. I finally found out that I received an A in Chemistry I and a B in Calculus II. I wanted an A in Calculus II, but after a slow start to the semester...

Trying to translate a mathematical term from Hebrew to English ("regression rule") If I translate it word by word in Hebrew, it's the "regression rule" Such as, I am told that "a series is defined for every natural n by the regression rule"...

To solve this question i came up with what i think is the recursive formula, the question is in the attachment, the recursive formula i came up with is Tn=tn-1+2 when t1=8 using the formula i can solve the questions but then it asks me to come up with a general term as well...what is...

Homework Statement Discrete mathematics is it possible to have a generating function where there is an n term outside the sum? such as 2^n SUM ( bn(0.5)^n * z^n) eg the 1st turn would be 2^n bo z^0 when you evaluate the series it evaluates to the series which i am trying to...

Homework Statement find the nth term Homework Equations x/2+(x^2)/3+(x^3)/2^2+(x^4)/3^2+(x^5)/2^3+... The Attempt at a Solution the numerator clearly is x^n but i have problems with the denominator

I always hear the term "with electrolytes!" I always hear the term "with electrolytes!" thrown onto sports drink labels. What does this mean? Is it really useful for athletes? I thought electrolytes were chemicals that conducted electricity as a liquid - but it's been a long time since chem...

hi, can anybody of you show me how the schrödinger equation with the spin term of the electron for the hydrogen atom looks like? i really do not know how to do this Gavroy