Elementary Definition and 558 Threads

1. The problem statement Suppose we have a thermodynamical system whose state is modified by external forces. This results in a change of the internal energy of the system. If we designate by W_{ext} the total work done during the process by the external forces acting on the particles of the...

Do you think there is such a thing as an elementary particle, regardless of whether such a thing has been detected/measured? What do you conceive an elementary particle to be? Dan Howitt Ny

Photons(light) follow the fermat's principle of least time...so do all elementary particles also follow fermat's principle of least time?..say electron,proton etc..

Homework Statement I'm trying to understand the Variation of Parameters in ODEs and I came up to this following expression which i cannot solve: {2\,{e}^{-t}{e}^{-3\,t}\choose {e}^{-t}{e}^{-3\,t}} \int {\,{e}^{t} {e}^{\,t}\choose {e}^{3t}{2e}^{-3\,t}} {10\,\cos \left( t \right)...

Elementary particle(ANYONE PLZ HELP ME WITH THIS Q) The charge-to mass ratio of the pi^- particle was determined. The charge-to-mas ratio of the electron is 1.76x10^11C/kg. a) predict which particle has a greater mass-the electron, or the particle. b) use the value of the elmentary charge to...

The charge-to mass ratio of the \pi-particle was determined. The charge-to-mas ratio of the electron is 1.76x10^11C/kg. a) predict which particle has a greater mass-the electron, or the \pi-particle. b) use the value of the elmentary charge to calculate the mass of the \pi-particle in kg...

Use the de Broglie equation to explain which is better probe of the contents of the nucleus--a fast-moving electron, or a slow-moving electron. Can someone simplify what the qestion is asking for?

Sketch a diagram of the atom H-2, using the appropriate quarks and leptons. Label the particles in your diagram. I don;t knoq how to do this because my book does not have any example of this...:(

hi, I am having trouble deriving an expression for converting between monochromatic flux expressed in wavelength and in frequency units. i think that the monochromatic flux of a star is found by F(Δf) = ΔE / ΔtΔfΔA F(Δλ) = ΔE / ΔtΔλΔA where E = energy, t = time, Δf = frequency bandwidth, A =...

Homework Statement An electron is confined in a box where a = 60nm, b = 20nm, c = 35nm. For each of the first four quantum levels above the ground state give: a) The quantum numbers b) The speed of an electron trapped at that level c) The wavelength of light needed to excite an electron...

My question is stated in the title. I wonder is it that scientists are not able to explain the origin of magnetic moment of elementary particles and say that it's an intrinsic property just like mass.

Hi. I am setting up math courses at ASU, and I am in a kind of bind. The original course that I was signing up for, required me to send in material that I've covered so I could be verified, however, without warning, they marked me as already finishing the course due to that material. So...

Homework Statement \int\frac{\arctan{x}dx}{x(x^2+1)} I've been thinking over this for the past few days...I'm still stuck though Can this integral even be expressed with elementary functions? Homework Equations N/A The Attempt at a Solution use the substitution u=tan{x}, and...

This is a brief tutorial to cover the basics of index notation which are useful when handling complicated expressions involving cross and dot products. I will skip over a lot of technicalities (such as covariant and contravariant vectors) and focus on 3 dimensions - but all of what I say here...

Hi, I have some elementary questions about geometry. I often find that I am perfectly able to do calculations, but sometimes I have the feeling I'm not totally understanding what I'm actually doing. Maybe this is familiar for some of you ;) Up 'till now I have some questions about quite...

The formulation of quantum theory does not comply with the notion of objective existence of elementary particles. Objective existence independent of observation implies the distinguishability of elementary particles. In other words: If elementary particles have an objective existence...

I have a homework question that reads: Represent the following rational functions as sums of elementary fractions and find the primitive functions ( indefinite integrals ); (a) f(z)=z-2/z^2+1 But my confusion arrises when I read sums of elementary fractions. I think what the question is...

How do 4 Hydrogen atoms combine to form 1 Helium atom? What I'm looking for is the sub-atomic process. So, here come 4 Hydrogen atoms racing towards each other and they are at such a high speed and temperature that something different happens. Something different than if they were going...

Hello all, I'm taking my first year in linear algebra and I'm having some issues understanding how to deal with some problems involving elementary matrices. First off, i have a set of problems that ask to find the elementary matrix E such that AE=B, and secondly i have a set of problems asking...

Hello, I have been trying to solve this type of question but the results of my efforts are frequently disappointing. Since this is considered elementary and simple I have no doubt that someone can help me with this: Solve arcsin (3/5) + arctan (1/7). What if it had said 641/19 instead of...

Homework Statement Determine the reduced row echolon form of | cos(x) sin(x) | | -sin(x) cos(x) | Homework Equations you can interchange any two rows or columns, multiply a row or column by a nonzero number, add a multiple of one row or column to another The Attempt at a...

Can Gamma(i) be expressed in terms of elementary functions? I know Mod(Gamma(i)) can. Bob.

Note: I posted this a month ago in the homework forum, but never got a reply. It really is an elementary question, and I think someone here might know the answer. (I hope I don't get an infraction for the re-post! If it's inappropriate, please delete.) Homework Statement Show that y(t)...

Question: I need to show that K = \mathbb{Q}(i, 2^{1/4}) is a Galois extensions of \mathbb{Q}. If I show that |Gal(\mathbb{Q}(i, 2^{1/4})/\mathbb{Q})|= [\mathbb{Q}(i, 2^{1/4}):\mathbb{Q}] , then we're done. Another approach is to find an irreducible polynomial f(x)\in \mathbb{Q}[x] such...

Hi! Although nobody can see the shape of elementary particles, we always assume that their shapes are symmetrical, for example, sphere. Why? Is the symmetry a law? Otherwise, are there any other reasons? Patrick

Does elementary number theory have any applications in physics? If so how?

In a right-angled triangle hypotenuse equals 10, altitude equals 6. What is the area of the triangle? Answers: 60, 30, 24, 16

Homework Statement For any open set U \subset \mathbb{R}^n and any continuous and injective mapping f : U \rightarrow \mathbb{R}^n, the image f(U) is open, and f(U) is a homeomorphism. Homework Equations N/A The Attempt at a Solution I am trying to learn how to write proofs, so...

I'm trying to teach myself differential geometry from the internet, and I've hit a snag in proving homeomorphisms. First, show that \Re^n is homeomorphic to any open ball in \Re^n. (I'm not sure how to write the conventional "R" using Latex.) I'm trying to prove this statement, but I am...

Hi I have some problems with really basic equations (really elementary) Let's say in order to solve an equation f(x)=0, we multiply the equation by x. Therefore we conclude that x can never be =0. But what if at the end step we conclude that x=0 (maybe along with other solutions)? Do we...

In an early set of experiments, Milikan observed that the following measure charges, among others, appeared at different times on a single oil drop. What value of elementary charge can be deduced from these data? 1) 6.563 x 10^-19 C 2) 8.204 x 10^-19 C 3) 11.50 x 10^-19 C 4) 13.13 x 10^-19...

Well There are numerous problems, I'll post up a few at a time. This is part of a larger assignment and I am so ashamed to say that I don't have any idea on some of them. 1) Factor x^8+2x^4y^4+9y^8 and a^4+b^4+c^2 - 2(a^2b^2 +a^2c+b^2c) I thought maybe it was some perfect square, the first...

I have a course on this in the following year and was just wondering what kind of texts are useful for a course on elementary topology. The course description is this: "Set Theory, metric spaces and general topology. Compactness, connectedness. Urysohn's Lemma and Tietze's Theorem. Baire...

Obviously, most elementary functions do not have elementary functions as integrals. For instance, the integral of e^-(x^2) is not an elementary function even though its integrand is. My question is, what is the smallest set of functions which includes the set of elementary function and is...

It is possible to calculate the velocity of falling bodies (ignoring air resistance of course) using a gravitational acceleration constant. If there is some other resistance, other than air, is it reasonable to simply reduce the acceleration by some amount to account for that resistance, if...

Elementary Matrices: Let A be a mxn matrix. Write down mxm matrices Ers, Dr( \lambda ) and Trs( \mu ) Ers Swaps rows r and s, Dr( \lambda ) multiplies row r by \lambda Trs( \mu ) adds \mu times row s to row r compute the determinant of the three matrices you found I...

Homework Statement Sphere A with charge -3q is 1.5 m from another identical sphere B with charge +5q. The two spheres are broughtinto contact and then separated by a distance of 1.5 m; the magnitude of the force between the spherees is 8.1 X 10^-2 N. a. Find the number of electrons...

I need to find the electrostatic force & the number of elementary particles between two charged balloons held in the center of their strings (Think of an Isosceles Triangle). Homework Statement Mpurple(balloon) - .00354 kg Mred - .00405 kg Lpurple - .725 m Lred - .68 m θ = 16° T =...

My teacher told me that elementary particles don't have position. Well, I don't understand this; it's like an oxymoron to me. Anyone with a easy-to-understand explanation?

The two bodies shown at the picture are moving along the surfaces marked as A and B with no friction and no rotation and with the same initial velocity. Which one will arrive first at the wall? We may assume that the second body never looses contact with surface B. Note that this question was...

What exactly is electron spin and intrinsic spin of elementary particles.Any link teaching these concepts from scratch would also be appreciated . Thnx

Hello All, First off, I will apologize in advance for being so ignorant and scatterbrained. Please humor me. In my Calc. I class, we are currently covering the continuity of functions. Our current problem set consists of determining where a given function is NOT continuous. My professor...

Free e-book is now available. Author: http://arxiv.org/find/grp_physics,grp_math,grp_nlin/1/au:+Sharipov/0/1/0/all/0/1" Title: Foundations of geometry for university students and high-school students Link: http://arxiv.org/abs/math.HO/0702029/"

What is mean by an "elementary particle"? I have always been intriguing about the definition of an "elementary paticle". Can we actually "define" a photon as a wave function $\psi(r,t)$ solution of the Maxwell Equation and "define" an electron as a wave function solution of the Klein-Gordan...

I am just starting in elementry Physics and so in fear of asking an over simplified Question Can some one break down the common Law's of Physic's relating to natural occurances such as Motion/Electricity/Vortex's and any other relitive information you may deem esential. Mark

The prompt for the question I am seeking help on is: "A freezer contains 20 kg of food with a specifit heat of 2x10^3 J/kg*c. The temperature inside the freezer is initially -5*C. The freezer motor them operates for 10 minutes, reducing the temperature to -8*C." I have found solutions to...

Homework Statement 1) How many electrons make up a charhe of 1 mu C? 2)What is the magnitude of the force a 10-mu C charge exerts on a 3.0-mC charge 2.0 m away? (1 muC=10^+/-6C , 1 mc=10^+/-3C) Homework Equations FE=(kQQ)/d^2 The Attempt at a Solution 1) (10E-6 C)/(1.6E-19) I got...

Hi all, is there a general way of proving that sqrt(r1) + sqrt(r2) + sqrt(r3) + ... + sqrt(rn) is irrational, given that none of r1, r2, r3, ..., rn is the square of a rational number? (or is this statement even true in general?) for the case when n = 2, the proof is quite...

Elementary Differential Equations With Boundary Value Problems (Hardcover, 2003) Author: C. H. Edwards, David E. Penney Format: Hardcover ISBN: 0131457748 2003 Publisher: Prentice Hall 768 pages Edition: 5 Language: English

Im just going through a practice exam and I was wondering If I could get someone to check my results. Q1 Let X = \{1,2,4,5\}, where elements of X are the sets 1 = \{0\}, 2 = 1 \cup \{1\}, etc. Evaluate each of the following: a) X \backslash \{2\} = \{1,2,4,5\} \backslash \{2\} = \{1,4,5\} b)...