Standard Definition and 1000 Threads

From my basic understanding of the standard model it tries to identify the different kinds of particles, understand their functions and their subsequent sub atomic particles. But as particles and forces break down into smaller components, do they also build up into bigger components? For...

Hi, The standard enthalpy of formation of carbon gas or C(g) is the enthalpy change for the formation of 1 mole of carbon gas from its elements in their reference form which for carbon (I believe) is C(graphite). Now I find the following standard enthalpy of formation for carbon gas / C(g)...

Homework Statement I know that standard error is to calculate how the sample deviate from the population. But standard deviation divide √n ,then will get it. And I don't understand why there is a T/n from the picture I uploaded. Please help Homework Equations Standard error x sqrt(n)...

I have a few questions for my homework assignments for solving limits, but in order to do those questions I have to use a few standard limits that we haven't been taught, which means I'll have to prove them. I know these can be done using L'Hopital's rule, but we haven't covered that yet so I...

Homework Statement I need to know the concentration in ppm of a standard Fe2+ solution. (diluted) Here is the data I have. I have 0.1964 g of Fe solution the purity is 99.7% The original solution was the above # of g in 250ml water. 10ml of this was then pipetted into a 100ml volumetric flask...

Homework Statement Let T be a linear transformation from R3 to R3. Suppose T transforms (1,1,0) ,(1,0,1) and (0,1,1) to (1,1,1) (0,1,3) and (3,4,0) respectively. Find the standard matrix of T and determine whether T is one to one and if T is onto Homework Equations The Attempt...

Homework Statement Let T be a linear transformation from R3 to R3. Suppose T transforms (1,1,0) ,(1,0,1) and (0,1,1) to (1,1,1) (0,1,3) and (3,4,0) respectively. Find the standard matrix of T and determine whether T is one to one and if T is onto Homework Equations The Attempt...

Homework Statement Let T be a linear transformation from R3 to R3. Suppose T transforms (1,1,0) ,(1,0,1) and (0,1,1) to (1,1,1) (0,1,3) and (3,4,0) respectively. Find the standard matrix of T and determine whether T is one to one and if T is onto

For a sample of size 5, if x1 - x̄ = -5, x2 - x̄ = 9, x3 - x̄ = -7, and x4 - x̄ = -2, then the sample standard deviation is: Choose one answer. a. 5.639 b. 6.782 c. None of the other answers are correct d. 6.305 e. 6.066 Please note that x̄ is x-bar (mean of sample). This...

Homework Statement I've still yet to learn Latex since I'm pretty good with words equation editor, so here's the question typed out in words. Homework Equations I really don't know what to do here. The Attempt at a Solution

Ok, so for a give function f(x) it's curve length from a to b is supposed to be ∫(1+(f '(x))^2)dx evaluated from a to b. However even wolfram alpha had a hard time solving that, plus the results were wrong. What am I missing? PS: With f(x)= sqrt(r^2-x^2)

I realize you can transform the data in many ways, but I really can't find a method to solve this particular scenario anywhere online: Suppose you are given the mean and standard deviation of a set of data. Further suppose you take away (get rid of) "x" elements in the original data set, and...

Marcus suggested that the nuMSM deserves its own thread and I agree. The nuMSM is the context in which the Shaposhnikov-Wetterich prediction of the Higgs mass was made. (PF thread.) A search on "nuMSM" at InspireHEP turns up 29 papers, a lot of them about cosmology. Shaposhnikov in...

Author: Matthew B. Robinson Title: Symmetry and the Standard Model Amazon Link: https://www.amazon.com/dp/1441982663/?tag=pfamazon01-20 Prerequisities: Contents:

Hi, I have a standard cell which I would like to rotate. I would like to rotate it in such a way such that when I define some plane in the unrotated cell [hkl] that this same plane corresponds to the [001] plane in the rotated cell. I essentially want to keep the same unit cell, just rotate the...

So I'm a little confused about what a standard candle tells us exactly. From what I understand, it means that the luminosity is relatively constant. Does this tell me something about apparent or absolute magnitudes? Like if a supernova has a peak brightness of an apparent magnitude of 0.7, does...

Find the standard form of $7x^2+48xy-7y^2+20x-110y-50=0$ and find euclidean transformation taking it to standard form. Answer: matrix of coefficents has eigenvalues + or -25 with eigenvectors (4,3) and (3,-4) respectively. set x'=1/5(4x+3y+a) and y'=1/5(3x-4+b). then comparing the terms of...

I am having trouble with algebra... I have to write an equation in standard form containing the given point and having the give slope for (2,1);m=1 I have no clue what I am doing and am not able to find anything online. Please help

more than "two standard deviations away from its mean" Suppose we need to find the probability that a binomial random variable with n = 100 and p = 0.5 is more than two standard deviations away from its mean and then compare this to the upper bound given by Chebyshev's Theorem. What is...

Don't be fooled by the word "conformal". This is not "AdS/CFT" stuff. The math is not stringy. It is very largely the conventional standard model. They've found a way to extend it's applicability and make more radical changes unnecessary. Furthermore it's testable. Here's what Meissner and...

Hi everybody! I've hit a blank with regards to this 1 equation on a old exam paper - think I've overloaded myself a bit and just feel a bit like a airhead at the moment! I understand the actual method and getting to the answer but it starts off with a equation which you then need to get to...

Hi all I just read Hestenes paper He has a massless electron which rotates about a fixed point at the speed of light . (look at eqns 8 9 10 and fig 1) I wonder if this is in the standard model or beyond? What is the lagragian of this "zitter" model?

I am en experimentalist and in most of my experiments I am interested in measuring the properties of distributions, i.e. the phenomenon I am measuring is stochastic and the parameters I am interested in are (in the simplest case) say the mean value and the width of the distribution (variance of...

Homework Statement I'm having trouble with these here.. it's been a while since I've done sequences and I can't seem to make this work with Standard Limits equations. Clearly the answer given by Wolfram solver is there after the = but i'd like to know the reasoning behind it. Anyone that...

Hi, I just solved a probability density function problem and the standard deviation is undefined.Does anyone know why it happens?It would help to develop my understanding.Thanks.

25x^2-10x-200y-119=0 Should i divide both sides by 25 and then put y and constant to right side of equation and then complete the square?

Homework Statement This is for an experiment that separates sugars in a sample using TLC. We are given a glucose standard solution with a concentration of 1mg/ml as well as 3 standard sugar solutions (glucose, fructose and maltose) all with the same concentration (10mg/ml) in 10% v/v...

Let T:R^2 -> R^2 be the linear transformation that projects an R^2 vector (x,y) orthogonally onto (-2,4). Find the standard matrix for T. I understand how to find a standard transformation matrix, I just don't really know what it's asking for. Is the transformation just (x-2, y+4)? Any...

Hi everyone. I am currently in a club that prepares students for technical interviews for jobs such as investment banking, private equity and hedge funds. One of our mentors assigned us this question and to be honest I really do not have an idea how to approach it. I'm not sure if I am...

Suppose there's a system with given uncertain parameters. And I would like to obtain certain Rise time, max. over shoot, settling time by adjusting those parameters. Let's say this is the second order system; T(s) = (ks + c) / (s2 + as + b) First of all; for a second order system there...

Homework Statement I teach a class of statistics with students who often do not have the types of calculators that can calculate standard deviation and who do not know how to program Excel, but do have access to the Internet. Googling "standard deviation calculator" on the Internet gives me...

Homework Statement Generalize: For arbitrary 0 < p < 1, show that the method giving a and b produces the minimum length interval. Hint: It might be helpful to use local extrema for the inverse function of the distribution function. Homework Equations The method is is talking about is...

Here's my problem: I know this formula http://carlschroedl.com/chem/ib_extended_essay.pdf (pg 18) is an extended form of Faraday's law of electrolysis which is m= (Q/F)(M/z) where m is the mass liberated in grams, Q is the total electric charge passing through, F is Faraday's constant, M is...

[FONT=arial][FONT=arial]Using the standard normal table in your lecture notes, calculate to four decimal places[FONT=arial] Table file:///Users/manukumarindia/Desktop/Screen%20Shot%202012-10-29%20at%2011.12.15%20AM.png Work done so far. [FONT=Helvetica]If X ~ N(22,4), z = (x - 22)/sqrt(4)...

Why is the standard entropy of aqueous ions negative? I thought it could be no less than 0, which represents a perfect crystal at 0 K? Is it negative so that calculations can be performed properly? Or is it because it because ions solutes actually have less entropy than a perfect crystal?

Homework Statement I am using a value of change in y say 12.10 cm + or - .06cm. I am trying to find velocity using the formula v= sqrt(2*g*change in y) how do I evaluate this equation with my standard error? because I can't just add or subtract the .06cm after since I will have a...

I'm doing a practice problem for my upcoming midterm and am stuck on a question. 3. The number of hurricanes that occur in the caribbean during hurricane season is a random variable, where the mean number of hurricanes occurring is 8, or E(X) = 8, with a standard deviation of 2.83. (a) Find...

Homework Statement Let N(x) denote the CDF of the standard normal density. So, it's the integral of the standard normal density from -∞ to x. Is it true that \lim_{b\to 0} N(\frac{a}{b}) = N(\frac{a}{\lim_{b\to 0}b}) = N(+\infty) = 1? 2. The attempt at a solution This is more of a...

Homework Statement http://imgur.com/lb0HL Homework Equations in pic The Attempt at a Solution So I multiplied the H2 + 1/2O2 equation by 3 and added it to the (N2H4, 2NH3) equation. I got H2O to match up and O2 to match up, but I don't know how to manipulate the other...

Homework Statement Solve the energy eigenvalue problem for the finite square well without using the symmetry assumption and show that the energy eigenstates must be either even or odd. Homework Equations The finite well goes-a to a and has a potential V0 outside the box and a potential...

I'm in the middle of a calculus course (this is not a calculus question per se), studying from the Larson text, and when an answer to a problem is the equation of a line, I solve for Standard form of a line Ax + By = C. I noticed, however, that the Larson textbook frequently terms answers of...

Homework Statement The question ask to find E[X]; E[X^2]; Var(X) for the standard normal distribution f(x)=1/\sqrt{2\pi}e^{-x^2/2}Homework Equations I found \begin{align} E[X]&=\int_{-\infty}^\infty \! x*1/\sqrt{2\pi}e^{-x^2/2} \, \mathrm{d} x\\ &=1/\sqrt{2\pi} ( \int_{-\infty}^0 \...

Hello, everyone. I understand the Standard Model and all of its quarks, leptons and bosons, but could someone show me the equation and simply explain it? I haven't been able to find it or an explanation of how it relates to the graphical representation of the Standard Model. Thanks in advance!

Homework Statement Given: Consider the following: city: Córdoba, Argentina Longitude = 64 deg 10 min W Latitude = 31 deg 28 min S Time zone = GMT -3 Date = 01 August On this date, the equation of time = -6 minutes. Assume no daylight saving time (a) Determine the standard time at solar noon...

In Frank Attix's book on Radialogical Physics Equation 1.2a reads σ = √(E) ≈ √(μ) σ= standard deviation of a single random measurement Where E is the expecation value of a stochastic process which approaches μ (μ is the average of measured values) as the number of measured values...

Hello, If have the standard deviation of acceleration (acceleration > 0) for a car. I also have the standard deviation of deceleration (acceleration <0). With these two figures is there a way to get the a standard deviation of the acceleration (both positive and negative)? Thanks

Okay, so we know that an equation of (x-a)^2 + (y-b)^2 = R^2 is the equation for a circle. Basically where x-a is change in the x-axis and y-b is the change in the y-axis. Here is the thing that I don't get, as quoted from my book. This equation in R^3 (three dimension) defines the cylinder...

Hello! I have a couple of questions on the following. Firstly, I was hoping someone could check my working and my reasoning. Secondly, I was wondering if someone knew an alternative way of solving this problem. I wanted to integrate this from x = -\infty to x = \infty: \lim_{a...

How to understand the "standard" momentum introduced in Weinberg's QFT I'm reading Weinberg's QFT Volume I. In page 63, you can find a formula (2.5.3) which states that the new state vector obtained by a Lorentz transformation is a linear combination of a whole bunch of other vectors...

Hello, I've been trying to find the answer to this question on the internet but no real luck so here goes: Imagine a signal My_signal which has two components, the actual signal A which is not constant over time and a noise component, we can call it N, where said noise component has a standard...