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|---|---|---|---|---|---|
3.4: Examples of Energy
[Go to previous section: 3.3]
[ Go to CENG301 Homepage | CENG301 Notes Table of Contents]
Skip to 3.4.2 Degree of Freedom Table for Energy Balances
3.4: Examples of Energy Balances
3.4.1 Sabatier Reactor Example
Problem: Determine the heat that must be added to a reactor in which CO[2] and... | 5 | [
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Why do I get a different answer using the binomial distribution function?
July 4th 2011, 06:19 AM #1
Member
Joined
Jul 2011
Posts
196
Why do I get a different answer using the binomial distribution function?
The question I am currently working with is as follows:
If three cards are randomly selected... | 4 | [
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Verifying an Identity (help)
May 20th 2013, 07:11 PM #1
Newbie
Joined
May 2013
From
Corvallis
Posts
3
Verifying an Identity (help)
could someone show the steps to verifying this identity, and what was used to solve it?
(cos x − sec x)^2 = tan^2 x − sin^2 x
Re: Verifying an Identity (hel... | 4 | [
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statistics problem
June 9th 2008, 06:22 PM #1
Newbie
Joined
May 2008
Posts
5
statistics problem
Thanks in advance.
Consider the simple linear regression of Y, average total sleep time per 24 hour period (ASTD) on X, age of the young child (AGE). Do not use a regression program, rather run the calc... | 4 | [
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Finding the graph formula with know points and other equation.
I have an equation for determining the acceleration of an object being propelled by a constant power source, that is affected by air resistance:
a = [itex]\frac{P}{mv}[/itex]-[itex]\frac{C[D]pAv^2}{2m}[/itex]
Since F = [itex]\frac{P}{v}[/itex]
I am tryin... | 4 | [
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A New Trigonometrically Fitted Two-Derivative Runge-Kutta Method for the Numerical Solution of the Schrödinger Equation and Related Problems
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 937858, 9 pages
http://dx.doi.org/10.1155/2013/937858
Research Article
A New Trigonometrically Fitted Two-Derivati... | 5 | [
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Patent US20030065430 - Attitude sensing system for an automotive vehicle
TECHNICAL FIELD
[0001] The present invention relates generally to a control apparatus for controlling a system of an automotive vehicle in response to sensed dynamic behavior, and more specifically, to a method and
apparatus for controlling the s... | 4 | [
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Intro to Derivatives
May 7th 2008, 05:46 PM
Macleef
Intro to Derivatives
Find the equation of the tangent to the curve $y = \frac {x^2}{x^2 + 1}$ at $x = 1$
$y' = \frac {2x}{(x^2 + 1)^2}$
$f'(1) = \frac {1}{2}$
$f(1) = \frac {1}{2}$
$\frac {1}{2} = \frac {1}{2} x + b$
$0 = b$
Theref... | 4 | [
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Trying to solve by substitution...getting stuck near the end
June 30th 2012, 02:40 PM #1
Newbie
Joined
Jun 2012
From
canada
Posts
12
Trying to solve by substitution...getting stuck near the end
Hi, I have a differential equation that I'm trying to solve my substitution. I've got most of it, but I can... | 5 | [
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Simple gravity question
joshmccraney, the equality comes from the fact that close to the Earth's surface the gravitational force can be regarded as being approximately constant, i.e., as not depending on distance as
measured from the ground.
It is easy to see this if you expand the gravitational force in a Taylor Seri... | 4 | [
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Marshall-Olkin Discrete Uniform Distribution
Journal of Probability
Volume 2014 (2014), Article ID 979312, 10 pages
http://dx.doi.org/10.1155/2014/979312
Research Article
Marshall-Olkin Discrete Uniform Distribution
^1Department of Statistics, Prajyothi Niketan College, Pudukkad, Thrissur-680 301, India
^2Department... | 5 | [
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proportions - heavy algebra needed
December 28th 2012, 02:54 PM #1
Junior Member
proportions - heavy algebra needed
Re: proportions - heavy algebra needed
Use a common denominator.
Re: proportions - heavy algebra needed
I agree with your advice, but would I then solve for a/b?
Re: proportions - heavy alg... | 4 | [
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Fermat's little theorem (lemma)
May 3rd 2012, 03:24 AM #1
I'm doing Number Theory, completed multiplication, division etc, but now moved on to Fermat's little theorem.
Having a bit of trouble seeing how to go about a couple of examples I have.
Generally
a^(p-1) [≡ ] 1 (mod p)
where p is a prime nu... | 5 | [
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Please Help me - Triangle Problem
September 23rd 2007, 01:28 AM #1
Newbie
Joined
Sep 2007
Posts
2
Please Help me - Triangle Problem
Hi, I'm trying to work out what must be a very simple bit of maths but not getting very far.
I have a triangle the angles are 90, 5 and 85
I know length of one of ... | 4 | [
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Physics Forums - View Single Post - Doppler Effect: Moving Observer riding on moving source! With reflection off wall!
1. The problem statement, all variables and given/known data
A bus is moving at 37.00m/s towards a wall. The sound from the bus has an original wavelength of 0.1500m. The sound from the bus reflects ... | 4 | [
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is it correct?
June 4th 2006, 09:14 AM #1
kansai
Guest
need help gr12
can any one tell me how to do question 1, 3,4,5,6,7,8? and when u have answer plz remember to explain ur steps thnx
hello, I could give answer to your first question
when a square is inscribed in a circle, the length of the diagnol of... | 4 | [
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Calculus/Differentiability
February 18th 2010, 07:04 AM
pantera
Calculus/Differentiability
Hello, I need help finishing this problem. Use one-sided limits to find values of the constants a and b that make the piecewise function differentiable at the point where the function rule
changes.
f(x) = e^(ax), ... | 5 | [
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surface integral
February 23rd 2008, 10:47 AM #1
Newbie
Joined
Feb 2008
Posts
8
surface integral
Hello, I need help with this one.
Calculate the area of the surface defined by:
z=sqrt(2xy), where 0<= x <=1 and 0<= y <= x^3
/Alex
Let $A$ be your area, then
$A=\iint_Rds,$ where $R =... | 5 | [
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Adaptive Estimation of Biological Rhythm in Crassulacean Acid Metabolism with Critical Manifold
ISRN Applied Mathematics
Volume 2013 (2013), Article ID 856404, 9 pages
http://dx.doi.org/10.1155/2013/856404
Research Article
Adaptive Estimation of Biological Rhythm in Crassulacean Acid Metabolism with Critical Manifold... | 4 | [
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Optimization
June 8th 2010, 01:30 PM #1
Junior Member
Joined
Apr 2010
Posts
25
Optimization
A wire 60 cm long is to be cut into 2 pieces. One of the pieces will be bent into the shape of a square and the other into an equilateral triangle. The wire is to be cut in order that the sum of
the areas of t... | 4 | [
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Patent US4959597 - Numerical control apparatus
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a numerical control apparatus for interpolatory control of a tool along the shape of a workpiece to be machined.
2. Description of the Related Art
If a workpiece formed into a predetermined... | 4 | [
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... | 17,920 | 17920 | |
Some more problems..(solving for x)
September 19th 2009, 08:32 PM #1
Newbie
Joined
Sep 2009
Posts
14
Some more problems..(solving for x)
I don't know why I just can't get these stupid problems..it seems that every problem has something different about it and I just don't get what I'm doing wrong...
... | 4 | [
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Adaptive Parameters for a Modified Comprehensive Learning Particle Swarm Optimizer
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 207318, 11 pages
http://dx.doi.org/10.1155/2012/207318
Research Article
Adaptive Parameters for a Modified Comprehensive Learning Particle Swarm Optimizer
^1College o... | 4 | [
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Math Help
Hey guys, I got stuck on this proof: Prove that $\displaystyle \frac{secx+tanx}{cscx+cotx}=\frac{cotx-cscx}{tanx-secx}$ Any help is appreciated!
Hello, rtblue! $\text{Prove that: }\;\displaystyle \frac{\sec x+\tan x}{\csc x+\cot x}\;=\;\frac{\cot x-\csc x}{\tan x-\sec x}$ On the left side, we have: . $\disp... | 4 | [
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Orthographic Projection
If terrestrial points are projected geometrically
Its principal use is in navigational astronomy because it is useful for illustrating and solving the navigational triangle. It is also useful for illustrating celestial coordinates. If the plane is
tangent at a point on the equator, the paralle... | 4 | [
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... | 17,924 | 17924 | |
Prove x^1/2 is concave
January 15th 2010, 02:37 PM #1
Junior Member
Joined
Aug 2009
Posts
30
Prove x^1/2 is concave
I have to prove this inequality to show that the function $f(x)=x^{1/2}$ is concave.
I am just stucked with the algebra
$(\mu x+ ( 1- \mu ) y )^{1/2} \geq \mu x^{1/2}+(1-\mu ) y^... | 5 | [
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Patent US7142597 - Full bridge integral noise shaping for quantization of pulse width modulation signals
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates generally to the field of digital amplifiers. More particularly, the invention relates to the processing of pulse modulated signals.
2. ... | 4 | [
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Trying to solve Alg 2 problem
January 26th 2009, 06:17 PM #1
Newbie
Joined
Jul 2008
Posts
3
Trying to solve Alg 2 problem
I'm trying to help a student with a word problem and am stuck on it. He's learning how to use functions to find maximum and minimum values for word problems. None of the examples in h... | 4 | [
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0.0023193359375,
... | 17,927 | 17927 | |
Complex Analysis (Residual Theorem).
December 4th 2008, 06:31 PM #1
Newbie
Joined
Nov 2008
From
Canada
Posts
4
Complex Analysis (Residual Theorem).
Solve
This is what I did... I'm not sure if I'm in the right direction about this problem.
I am french so excuse me if my translation in englis... | 5 | [
-0.0361328125,
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Integration problem, center of mass
February 2nd 2009, 09:27 AM #1
Newbie
Joined
Feb 2009
Posts
1
Integration problem, center of mass
Hi could someone please help me set up the integrals for this problem. I am trying to find the center of mass. Thank you
1. for the region bounded by the parabola x... | 5 | [
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... | 17,929 | 17929 | |
Finding the equations of tangents
March 21st 2011, 11:12 AM #1
Junior Member
Joined
Feb 2011
Posts
72
Finding the equations of tangents
Finding the equations of the tangent to the curve at the given point.
$y = 4/x^2 at$ x = 1
I understand how to work out this but I haven't figured out how to t... | 4 | [
0.058837890625,
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Patent US20060140400 - Trapdoor one-way functions on elliptic curves and their application to shorter signatures and asymmetric encryption
This application claims priority from PCT Application No. PCT/IB2004/003700 filed on Nov. 11, 2004 and U.S. Provisional Application No. 60/626,884 filed Nov. 12, 2004.
FIELD OF THE... | 4 | [
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Population Growth
November 30th 2008, 09:58 PM #1
MHF Contributor
Joined
Jul 2008
From
NYC
Posts
1,489
Population Growth
According to the two censuses, the population of a country in 1980 was 4 million and in 1992 it was 9 million. assuming the population grows at the same rate(exponentially), what i... | 4 | [
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... | 17,932 | 17932 | |
A intersect (B U C)
I need to prove A intersect (B U C)=(A intersect B)U(A intersect C). I'm having trouble getting started....
here's a start, prove that $A \cap (B \cup C) \subseteq (A \cap B) \cup (A \cap C)$ and then prove that $(A \cap B) \cup (A \cap C) \subseteq A \cap (B \cup C)$, then you are done, since $(X ... | 4 | [
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... | 17,933 | 17933 | |
maximize volume, minimize surface area
January 16th 2011, 06:48 AM #1
Junior Member
Joined
Aug 2010
Posts
48
maximize volume, minimize surface area
Given a volume of 1700 cm^3, minimize the surface area of a cylinder.
S= $2 \pi rh+2 \pi r^2$
V= $\pi r^2h=1700$
so, for substitutions:
$h... | 5 | [
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2)-Dimensional Sine-Gordon Equation
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 645456, 8 pages
http://dx.doi.org/10.1155/2014/645456
Research Article
Some New Exact Solutions of (1+2)-Dimensional Sine-Gordon Equation
Department of Physics, Zhejiang Normal University, Jinhua 321004, China
Received ... | 5 | [
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0.03442... | 17,935 | 17935 | |
Differentiation application
January 14th 2013, 08:05 AM #1
Newbie
Joined
Jan 2013
From
Vinh city
Posts
6
Differentiation application
Not sure if I post this in the right thread but still hope you guys can help me out with this :-)
---
A body moves along a horizontal line according to s=f(t)=t... | 4 | [
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0.... | 17,936 | 17936 | |
GMAT Percentage
• GMAT Prep (USA)
•
• GMAT Prep (International)
•
• Favorite GMAT Articles
□ 800score GMAT Course Reviews
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•
• Free GMAT Prep
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... | 4 | [
0.040771484375,
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0.047119140625,
-0.... | 17,937 | 17937 | |
General Linear Group of a Vector Space
Norwegian
The object that Master J is searching for here, is called the Endomorphism ring of V, End(V), consisting of all linear maps V-->V, with the operations indicated. Although the above poster doesnt
consider this a "very good ring", it is interesting enough to have its ow... | 4 | [
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0.0732421875,... | 17,938 | 17938 | |
Stability of SIRS Epidemic Model with Stochastic Perturbation and Distributed Delays
ISRN Applied Mathematics
Volume 2013 (2013), Article ID 606431, 6 pages
http://dx.doi.org/10.1155/2013/606431
Research Article
Stability of SIRS Epidemic Model with Stochastic Perturbation and Distributed Delays
College of Mathemati... | 5 | [
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Probability that a random k-digit number contains at least one 0, 1, and 2
September 23rd 2010, 06:51 AM
Runty
Probability that a random k-digit number contains at least one 0, 1, and 2
Let $k\geq 3$ be any given integer. What is the probability that a random k-digit number will have at least one 0, at least one... | 5 | [
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-0.01336669921875... | 17,940 | 17940 | |
The state of equilibrium (where R=1) can help us explore the immunisation level required for the eradication of an infectious agent.
From the definition of R (see previous slide), it is:
R = R[0] (S/N) [S: number of susceptibles; I: number of immunes; N: total population].
In the state of equilibrium, it is:
R = R[0]... | 4 | [
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-... | 17,941 | 17941 | |
Homomorphism of rings, inverses map to inverse?
May 26th 2013, 09:48 AM #1
Member
Joined
Apr 2008
Posts
137
Thanks
4
Homomorphism of rings, inverses map to inverse?
Hi,
If $\phi: R \to S$ is a homomorphism between two rings $R$ and $S$.
Is it true that:
If $a \in R$ is a unit then $\ph... | 5 | [
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0.09375,
-... | 17,942 | 17942 | |
Expected squared euclidean distance
January 18th 2009, 04:46 AM #1
Newbie
Joined
Jan 2009
Posts
8
Expected squared euclidean distance
Hi,
can someone help me with this problem?
Let $X, Y$ be two independent $d$-dimensional random variables with Gaussian distribution $N(\mu_{X},\sigma^2 \mathbb... | 5 | [
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-0.015380859375,
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Patent US20040253736 - Apparatus for monitoring glucose concentration in capillary blood
BACKGROUND OF INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates, in general, to analytical devices and, in particular, to analytical devices and associated methods for predicting a subject's blood an... | 4 | [
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... | 17,944 | 17944 | |
Locate Cellphone Using Triangulation
December 5th 2012, 04:18 PM
meghan112
Locate Cellphone Using Triangulation
Hi Everyone...
For a homework problem I need to locate a cell phone using triangulation. Three cell towers form an equilateral triangle with 4.1 mile sides. The transmitting cell phone is somewher... | 4 | [
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Exponential and Logarithmic Equations
April 1st 2010, 08:09 PM #1
Junior Member
Joined
Feb 2010
Posts
52
Solve the logarithmic equation algebraically and approximate the result
Ln x + Ln(x - 2) = 1
I solved it to approximately 2.928
I want to ask why the negative number is extraneous becaus... | 4 | [
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Constraints on the NMSSM from the Oblique Parameters
Advances in High Energy Physics
Volume 2013 (2013), Article ID 293205, 7 pages
http://dx.doi.org/10.1155/2013/293205
Research Article
Constraints on the NMSSM from the Oblique Parameters
Fakultät für Physik, Universität Bielefeld, 33615 Bielefeld, Germany
Receive... | 4 | [
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04. Creating Sets of Functions
This page shows an application of symbolic mathematics to the solution of an important real-world problem.
Some functions live alone in the world of mathematics, while others are more naturally organized into related sets. This project shows how a single equation can be used to construct... | 5 | [
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0.00009393692016601... | 17,948 | 17948 | |
the encyclopedic entry of quantum teleportation
Quantum teleportation
, or
entanglement-assisted teleportation
, is a technique used to transfer
information
on a
quantum
level, usually from one
particle
(or series of particles) to another particle (or series of particles) in another location via
quantum entan... | 4 | [
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-0.06982... | 17,949 | 17949 | |
The Order Continuity of the Regular Norm on Regular Operator Spaces
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 183786, 6 pages
http://dx.doi.org/10.1155/2013/183786
Research Article
The Order Continuity of the Regular Norm on Regular Operator Spaces
School of Mathematics, Southwest Jiaotong Univers... | 5 | [
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Convergence /Divergence of series:sec(n)/n
Let ε be small and positive. Then, if [itex]x \in (\frac{\pi}{2} - \epsilon, \frac{\pi}{2} + \epsilon)[/itex], we have [itex]|\cos \epsilon| < \epsilon[/itex]
(The intervals could be slightly bigger, but I doubt that extra precision is relevant)
Since [itex]|\cos x|[/itex] i... | 4 | [
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-0.047607421... | 17,951 | 17951 | |
Analytic continuation of an integral involving the mittag-leffler function
the mittag-leffler function admits the beautiful continuation :
[tex]E_{\alpha}(z)=1-E_{-\alpha}(z^{-1}) [/tex]
using the fact that
[tex]I(s)=\frac{1}{4}\int_{0}^{\infty}\frac{\theta(ix) \left(sE_{s/2} ((\pi x)^{s/2})-s-2x^{1/2}\right)}{x}dx [... | 4 | [
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Isosceles Triangle
May 6th 2007, 12:50 PM #1
The legs of an isosceles triangle are 13 units long and the altitude to the base is 12 units long. What is the length of the base? How do you solve this?
Thank you!!!
Hello,
the altitude divides the triangle into 2 right triangles. The legs of the isoscel... | 4 | [
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0.0693359375... | 17,953 | 17953 | |
Quicklopedia
August 25th 2006, 11:10 AM #31
Quick
The only thing I think I did wrong was set some limits at plus or minus infinity... (which I have changed in my post)
I also found that I did the last two wrong (thanx in large part by rebesque), which I have changed in my post.
Actually,
$\lim_... | 5 | [
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On the Domination Number of Cartesian Product of Two Directed Cycles
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 619695, 7 pages
http://dx.doi.org/10.1155/2013/619695
Research Article
On the Domination Number of Cartesian Product of Two Directed Cycles
^1School of Information Science and Technology... | 5 | [
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0.01275634765625,
-0.09326171875... | 17,955 | 17955 | |
Exponential problem
November 28th 2009, 12:45 AM
dojo
Exponential problem
Guys, Just a quick one:
Can anyone help me with e^((x+2lnx)) which is part of a bigger problem I'm working on?
I think that it is e^x + x^2 but apparently this is wrong. I can't see how to move on as I though if you took the anti... | 5 | [
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0... | 17,956 | 17956 | |
Help Mortgage payment
February 6th 2008, 02:54 AM #1
Newbie
Joined
Jan 2008
Posts
14
Hi!!
In one of my assignments, we had to figure out monthly mortgage payments.
I used a calculator because I do know know how to show the work.
The question was getting a 30year mortgage@ 100,000 with a 6.5%... | 5 | [
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Patent US7453796 - Method and apparatus for designing networks to support fast restoration
FIELD OF THE INVENTION
The present invention relates to network design techniques and, more particularly, to network design techniques that support fast restoration.
BACKGROUND OF THE INVENTION
Dynamic provisioning of bandwidt... | 4 | [
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Patent US20040230632 - Computationally efficient mathematical engine
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims priority from U.S. provisional application No. 60/413,164 filed Sep. 24, 2002, which is incorporated by reference as if fully set forth.
FIELD OF INVENTION
[0002] The present inv... | 4 | [
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-... | 17,959 | 17959 | |
Beta function?
February 10th 2009, 12:55 PM
fardeen_gen
Beta function?
Prove that:
$n\:\int_{0}^{1} x^m \:(1-x)^{n-1}dx = \frac{n!\:m!}{(m+n)!}$
Is this correct?
L.H.S
= n.B(m, n -1) , where B(x, y) is Beta function
= n. m!(n-1)!/((m + n - 1 + 1)!)
= n(n-1)!m!/((m+n)!)
= R.H.S
Febru... | 5 | [
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Partial Fractions
January 16th 2010, 12:38 PM #1
Junior Member
Joined
Jan 2010
Posts
65
Partial Fractions
Hello,
Could someone please help me by telling me what the best way to resolve the following equation into three partial fractions is?
$6x^2 +5x -2<br /> \div<br /> x(x-1)(2x+1)$
$\fra... | 4 | [
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... | 17,961 | 17961 | |
factoring polynomials
March 17th 2011, 05:02 PM #1
Junior Member
Joined
Mar 2011
Posts
34
factoring polynomials
Im looking to for the steps to solve this: 3(x^2 -2)² (2x-3)^2
apparent answer: 12x^6 - 36x^5 - 21x^4 +144x^3 - 60x^2 - 144x + 108
Last edited by reallylongnickname; March 17th 2011 a... | 4 | [
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... | 17,962 | 17962 | |
Word Problems
December 20th 2007, 10:31 AM #1
Junior Member
Joined
Jun 2006
Posts
25
Word Problems
Bah its always these I get stuck on.
1. A man walks 18km he goes .5km/h faster than planed and reaches destination 30mins early. What was his planned speed.
2. Chess tournament as 45 games everyo... | 4 | [
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42 men can do a work in 15 days, how many men for 21 days?
February 10th 2011, 10:48 PM
bahadarali
42 men can do a work in 15 days, how many men for 21 days?
Q25: If 42 men can do a work in 15 days, how many men are required to
complete it in 21 days?
A. 24
B. 36
C. 30
D. None of these
ho... | 4 | [
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Distance from Point to Plane
March 31st 2010, 10:30 AM
Lafexlos
Distance from Point to Plane
Without using distance formula, find the distance from the point (0,0,1) to the plane $\;4y\;+\;3z\;=\;-12\;$
i dont have any idea about how to solve. :S
March 31st 2010, 11:40 AM
elim
Quote:
$(0,0,-4)$... | 5 | [
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Graphing and integration problemo
September 13th 2008, 10:29 PM #1
1. graph y=|f(|x|)|
2. If: $2/(x^3+x^2+x+1) = 1/(x+1)-x/(x^2+1)+1/(x^2+1)$
Hence evaluate the definite integral between 0.5 and 2 of $2/(x^3+x^2+x+1) dx$ (to the x-axis) using the above result
are questions 1 and 2 talking about the ... | 4 | [
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0.056640625,
-0.053955078125... | 17,966 | 17966 | |
Math Help
December 2nd 2011, 02:17 PM #1
MHF Contributor
Joined
Mar 2010
From
Florida
Posts
3,093
Thanks
5
p-group
Prove that if G is a finite p-group, then its center is non-trivial.
Use this fact to prove if $|G|=p^2$, then G is abelian.
For the first part, I have:
So $|G|=p^{\alp... | 5 | [
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0.00939... | 17,967 | 17967 | |
Calculating total error
1. The problem statement, all variables and given/known data
First of all, I do not know if I am asking a complex question or easy question... since I haven't covered this in detail, but my physics teacher requires the class to use it in the lab
1. When you have one value value how do you calc... | 4 | [
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-0.1152343... | 17,968 | 17968 | |
Hero velocity problem
October 9th 2012, 04:10 PM
Oldspice1212
Hero velocity problem
In an action-adventure film, the hero is supposed to throw a grenade from his car, which is going 86.0 km/h, to his enemy's car, which is going 103km/h . The enemy's car is 14.5m in front of the
hero's when he lets go of the ... | 4 | [
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... | 17,969 | 17969 | |
Common Electric Circuits and Combination of Batteries
In common electric circuits you can come across with, batteries, switches, and connection wires. We now examine the components of the simple circuit one by one.
1. Batteries: Device which supplies energy to the circuit is called battery. We show it in the circuit ... | 4 | [
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... | 17,970 | 17970 | |
How to Select a Statistically Significant Sample Size | The Classroom | Synonym
When you conduct a survey, you want to make sure that you have enough people involved so that the results will be statistically significant. However, the larger your survey, the more time and money
you will have to spend to complete it. To ... | 4 | [
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0.02... | 17,971 | 17971 | |
Several questions in electromagnetics
I will expand on the technical issues that I alluded to before, then address some additional issues.
1) The reason that the integral of [tex] \oint_c \vec E\cdot d\vec l [/tex] is zero is not that the area of the path goes to zero. It is zero because the line integral of E paralle... | 4 | [
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-0.000471115112304687... | 17,972 | 17972 | |
Interest compounding with a twist
February 3rd 2009, 06:22 AM
swe_dev1@hotmail.com
Interest compounding with a twist
There are heaps of webpages with formulas for calculating compounding interest, but none (that I have found) that explains the formula to use when the deposit frequency does NOT necessarily match
... | 5 | [
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0.01940917968... | 17,973 | 17973 | |
Composition of Two Functions
May 14th 2011, 10:44 AM #1
Composition of Two Functions
This is a question by PapaSmurf:
2)
Let and f(x) = 9x + k and g(x) = kx + 9.
Find the product of all distinct k such that f(g(x)) = g(f(x)). [Word for word, no typos]
Given that
$f(x)=9x+k \quad g(x)=kx+9$... | 4 | [
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-0.0230712890625,
0.09326... | 17,974 | 17974 | |
Area of region bounded by polar equation
July 29th 2009, 09:23 PM #1
Newbie
Joined
Jul 2009
Posts
4
Area of region bounded by polar equation
Find the area of the region that is outside the graph of the first equation and inside the graph of the second equation.
1. r=2
2. r= 4cosx
(x = theta... | 5 | [
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0.0230712890625,
-0.04443359375,
-0.0551757812... | 17,975 | 17975 | |
Sampling
August 12th 2013, 04:21 AM
alexander9408
Sampling
1.The power consumption of a certain brand light bulb have a normal distribution with mean 60 watts and a standard deviation 2 watts. Find the probability that
(a) 3 bulbs selected randomly each has a power consumption exceeding 61 watts.
X ̅~N(6... | 4 | [
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0.0712890625,
0.00506591796875,
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-0.03515625,
-0.08935546875,
-0.0... | 17,976 | 17976 | |
Complete metric on a Riemann surface with punctures
up vote 1 down vote favorite
If we have a Riemann surface with punctures of negative Euler characterstisc, how can one define a complete hyperbolic metric?
I know that in this case the universal cover is the hyperbolic plane and it has a complete metric. Do we proj... | 4 | [
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-0.0292... | 17,977 | 17977 | |
Patent US5218621 - Adaptive digital equalization filter
TECHNICAL FIELD
This application relates to dynamic delay equalization of anti-alias filters for digital simulcast systems.
BACKGROUND OF THE INVENTION
In simulcast systems it is important that identical modulating signals are produced at each transmitter site.... | 4 | [
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Exponential value
henrywang
For proving the natural number, e.
(1+1/n)^n As n approches infinite, (1+1/n)^n ----> e
However, wouldnt it become one as n becomes infinite?
(1+1/n)^n=(1+0)^n=1
Could anyone explain this to me please!
The manipulation here takes a limit involving one variable and turns it into what amou... | 4 | [
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0.07958984375,
0.0272216796875,
0.005828857421875,
-0.0222... | 17,979 | 17979 | |
Math Help
(Quoted from mymathforum, where you cross-posted...) We are given: $\int\frac{\sec x}{1+2\sin^2x}\,dx$ Let's rewrite the integrand: $\frac{\sec x}{1+2\sin^2x}=\frac{\cos x}{3}\(\frac{1+2\sin^2x+2\(1-
\sin^2x\)}{\cos^2x\(1+2\sin^2x\)}\)=\frac{\cos x}{3}\(\frac{1}{1-\sin^2x}+\frac{2}{1+2\sin^2x}\)=$ $\frac{\co... | 5 | [
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-0.059814453125,
0.0439453125,
0... | 17,980 | 17980 | |
Probability Problem
March 10th 2009, 04:44 PM #1
Junior Member
Joined
Feb 2009
Posts
34
Probability Problem
A bag contains 4 green balls, 7 red balls and 8 blue balls. Two balls are picked out at random. Find the probability that one green ball and one red ball are picked:
a) If the two balls were c... | 5 | [
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0.04541015625,
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0.0546875,
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-0.09375,
-0.046142578125,
-0.141601... | 17,981 | 17981 | |
My simple proof of x^0 = 1
0^0 is either undefined or arbitrarily defined to be some value, typically one. It is clear when examining a plot of z=x^y that the value of z at (x,y)=(0,0) depends on the direction via which one
approaches this (x,y) pair. All of the previous posts have approached this point in a direction ... | 4 | [
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0.0849609375,
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-0.07666015625,
-0.0546875,
0.03... | 17,982 | 17982 | |
Jackson Electrodynamics problem 6.5b
1. The problem statement, all variables and given/known data
A localized electric charge distribution produces an electrostatic field,
[tex]
{\bf E}=-\nabla \phi
[/tex]
Into this field is placed a small localized time-independent current density J(x) which generates a magnetic field... | 4 | [
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Math Help
December 18th 2008, 04:47 PM #1
Newbie
Joined
Jul 2008
Posts
15
Matrix A
Matrix A= 1 2 0
2 1 0
2 -1 3
i got eigenvalues k=3 k=-1 what do i do after that to prove it is not able to be diagonalized
To be diagonalizable means to be conjugate to a diagonal matrix. That is, A is... | 4 | [
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Bob bikes to school every day at a steady rate of x miles
Author Message
TAGS:
Bob bikes to school every day at a steady rate of x miles [#permalink] 11 Dec 2007, 19:57
... | 4 | [
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Very tough integral problem.
integrate: x^2dx/x^2+2x+1 I have no idea how to do this one, please help!!
$\int \frac{x^2}{x^2+2x+1}dx=\int \frac{x^2}{(x+1)^2}dx$ let u=x+1 and du=dx x=u-1 so we get $\int \frac{x^2}{(x+1)^2}dx=\int \frac{(u-1)^2}{u^2}du=$ $\int \frac{u^2-2u+1}{u^2}du=\int \left( 1-\frac
{2}{u}+\frac{1}{... | 5 | [
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Find an equation of the parabola?
March 19th 2010, 11:29 AM
iluvmathbutitshard
Find an equation of the parabola?
Question says to find an equation of the parabola:
Vertex (-1, 2); Focus (-1, 0)
How do I do this? I am confused.
Thanks for any help.
March 19th 2010, 12:11 PM
harish21
Quote:
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find the missing factor
how do i do this problem find the missing factor 7m2 times (?) = 35m8 -28m5 -42m2
Quote: Originally Posted by jim1174 I understand the problem as, $7m^2 (?)=35m^8-28m^5-42m^2$ On the right side you get $35m^8$ thus, which number when multiplied by $7m^2$ gives $35m^8$? The answer
is $5m^6$. Now... | 4 | [
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Question on integration..finding the area?
April 18th 2010, 01:10 PM #1
Newbie
Joined
Apr 2010
Posts
7
y=x^3.
P = (3,27)
PQ is tangent to the curve at P
Picture of graph: http://i42.tinypic.com/fvl8gy.jpg
Find the area of the region enclosed between the curve, PQ and the x-axis.
I(x)... | 5 | [
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Rigid Motions
November 8th 2011, 11:17 PM #16
MHF Contributor
Joined
Mar 2011
From
Tejas
Posts
3,281
Thanks
673
Re: Rigid Motions
because M/SM is isomorphic to the 2-element group {-1,1}.
and these are the cosets:
SM = rotations, SM*R = reflections.
this is the isomorphism:
SM... | 5 | [
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Find the general solution for...
November 4th 2011, 07:34 PM
Educated
Find the general solution for...
I'm having a bit of trouble solving this trig problem:
Quote:
Find the General solution for... $\sin(4x) - \cos(x) = 0$
At first when I looked at it it seemed easy but as I tried to solve it, it... | 4 | [
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o
Book Tour
This page provides a brief overview of the overall flow of the book. Elsewhere on the site, you may find a detailed table of contents, examples of specific chapters, and examples of specific
programming exercises. The figures on this page are taken from the 150+ figures in the book, with each figure number... | 4 | [
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... | 17,992 | 17992 | |
Patent US4504948 - Syndrome processing unit for multibyte error correcting systems
BACKGROUND OF THE INVENTION
1. Field of Invention
This invention relates in general to error correcting systems employing cyclic error correcting codes and, in particular, to an improved method and apparatus for processing syndrome byt... | 4 | [
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0.... | 17,993 | 17993 | |
Angles, Degrees, and Arcs
August 7th 2006, 06:23 AM
juangohan9
Angles, Degrees, and Arcs
Hey there, I've got a few questions.
I have no idea how to figure out these kind of word problems. I'm taking an online class and I've got no source of help but here. So, is there some sort of formula I must follow with... | 5 | [
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Life Contingencies
May 1st 2009, 07:21 AM #1
Life Contingencies
please see attached word doc for problem, I could not get all the symbols to properly display on the thread.
there are 2 problems, 1st uses the survival function and the second is using de moivre's law. any help would be appreciated
Many m... | 5 | [
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Mathematica: Solving equations
March 9th 2010, 12:34 PM #1
Junior Member
Joined
Oct 2008
Posts
49
Mathematica: Solving equations
Hi guys
I wish to find the solution to
-2.0(Cos[x] + Cos[0.05x]) == 1.0,
and I use NSolve. However, Mathematica does not give me a result; it complaints, and giv... | 5 | [
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Kantowski-Sachs String Cosmological Model with Bulk Viscosity in General Scalar Tensor Theory of Gravitation
ISRN Mathematical Physics
Volume 2013 (2013), Article ID 759274, 5 pages
http://dx.doi.org/10.1155/2013/759274
Research Article
Kantowski-Sachs String Cosmological Model with Bulk Viscosity in General Scalar T... | 4 | [
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Partial differential notation
June 9th 2013, 03:24 AM #1
Member
Joined
May 2008
From
Melbourne Australia
Posts
203
Thanks
15
Partial differential notation
Given
$L=L(x,y,z,\dot x,\dot y,\dot z)$
then I can write the six partial derivatives (as I would when forming Euler-Lagrange equatio... | 4 | [
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Gaussian Elimination Method
October 17th 2007, 07:37 AM #1
Newbie
Joined
Oct 2007
Posts
14
Gaussian Elimination Method
Help me if you can: Here are the questions.
1) Sovle the system of equations by the Gaussian elimination method:
{ 2x + y - 3z = 1
{ 3x - y + 4z = 6
{ x + 2y - z = 9
... | 4 | [
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