Hello, I've been trying to find online where I could calculate my grade based off a college curve. So the average grade on the test was a 63. The RMS is 16. I got a 86. So what will my grade curve to? This is out of 50 people. Also, the professor curves to a 70 (I think).
what changes does there occur in the result of the gaussian distribution "integration e^-alpha*x^2 dx=sqrt(pi/alpha) if i substitute that x^2 with some (x-a)^2?
then what should be the integral result ?
I am measuring the thickness of many identically prepared objects. In order to obtain the most accurate value, I measure each object multiple times, in different locations, and average these values to get the average thickness of that object, along with the standard deviation. But I am really...
Three related questions on which I could use some help:
a] In another thread, Bill_k posted something like:
"Electrons, being charged, could exchange energy by exchanging a virtual photon."
ok, yet I thought electrons usually interacted via the EM field ['real' photons]...
So how...
I was wondering if anyone could help me with calculating the standard deviation of the standard deviation. What I mean by this is say for example I roll a dice 100 times and then calculate the mean and standard deviation from the results I collected. The results are not going to be exact because...
Say we want to saw ten planks and we have two methods available - one is sawing them all at once, ensuring they're all exactly uniform length. The other method is sawing them individually. Either method has EV of 1m and a standard deviation of 0.005m. I want to find the standard deviation of...
http://arxiv.org/abs/1304.8050
Beyond the Spectral Standard Model: Emergence of Pati-Salam Unification
Ali H. Chamseddine, Alain Connes, Walter D. van Suijlekom
(Submitted on 30 Apr 2013)
I have a few questions about this paper...
How good is "almost uniquely"? i.e. it would be good to see...
Let $A$ be any set. Show that there is no bijection between $A$ and the power set $\mathcal P(A)$ of $A$.
(The power set of a set is the set of all its subsets including the empty-set.)
Homework Statement
Hi all, I have a question about a standard flat key being specified to prevent failure. I'm just quickly giving a problem description because once I understand what's going on I can easily run calculations but I'm missing something fundamental.
Essentially the problem I...
Hi, can someone please explain to me how I can identify which is the oxidation half and which is the reduction half of a redox reaction. I have read on the internet that the oxidation half is the highest up the table between the two then why doesn't it work for:
(Ca^2+) + 2Br → Ca + Br2...
Homework Statement
I'm trying to convert something like 1.25^-03 into it's standard number composed of standard decimals using a calculator (0.0125) - if you know what I mean.
Thanks.
So one can even have "beyond standard Thermodynamics" :biggrin: I just came across this and it seems interesting.
http://arxiv.org/abs/1207.0434
Laws of thermodynamics beyond the von Neumann regime
Dario Egloff, Oscar C. O. Dahlsten, Renato Renner, Vlatko Vedral
(Submitted on 2 Jul 2012)...
Q) A solid non-conducting sphere of radius R carries non-uniform charge distribution with charge density ρ = ρs(r/R), where ρs is a constant. Show that
(a) the total charge on the sphere is Q = ∏ρsR3, and
(b) find the electric field inside the sphere.
Now first part (a) is fairly easy,
assumed...
I've always understood that the "formula" for the Standard Model is SU(3) × SU(2) × U(1). Since the discovery of the Higgs boson, and observations of neutrino flavor oscillations, has that formula been revised, or is it still the same?
My thermodynamics textbook says that chemical potential can take any of the following symbols: μ (condition-dependent), μ∇ (standard), μΘ (standard) (superscript plimsoll line) and μO (standard), with which one of the latter 3 being used depending on the temperature chosen to define standard...
Hello,
I am wondering how to make a standard additions curve for this experiment. In this experiment, we used cyclic voltammetry to determine the original concentration of an elixir. We diluted the elixir to 0.75mM based on a claimed concentration of acetaminophen (instructed) and an elixir...
Homework Statement
Find the standard matrix representation for each of the following linear operators:
L is the linear operator that reflects each vector x in R2 about the x1 axis and then rotates it 90° in the counterclockwise direction.
Homework Equations
The Attempt at a Solution
So my...
How many internal degrees of freedom does it have? In other words, how many 4d real functions do we have to specify in configuration space (i mean the space we use in Path integration) in order to specify a state?
It is difficult to state the question, so, in order to be more precise, the...
How do I work out the standard deviation of a set of variables where the frequency changes by a certain factor each time, but where there is no limit on the number of variables?
Let's just use "test scores" as an example because that's easy to understand.
The average is 80; 1 in 5 people...
Hi, I was just wondering why there are a finite number of fundamental particles in the universe. Why is it that when cern collide particles, the same particles are formed every time. Its like putting a hammer to a concrete block and every time you do so, the same chips with the same shape and...
Homework Statement
Question:
Refer to Fig. 6-5. This standard TTL 2-input NAND gate uses ______ (open-collector, totem pole) outputs.
Solution:
The 2-input TTL NAND gate in Fig. 6-5 (which is attached as "TheFigure.jpg") uses a totem pole output configuration.
Homework Equations
N/A...
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...
I'm an undergrad physics student and have to write an essay on the Higgs boson and the future of the standard model. I don't need to have a comprehensive understanding of the maths underpinning it all, but it's quite difficult to find any undergraduate level reading on the subject. I'm currently...
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.
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...