content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
I need fast HELP
August 6th 2006, 08:41 AM
jaycas21
I need help with these fast HELP!!!!!
amount of natural gas is proportional to oxygen consumed. 24.0 kg of Oxygen is
consumed in burning 15 kg of gas how much air 23% oxygen by wieght is consumed to burn 50 kg
a.80 kg
b 345 kg
c. 31.3 kg
d.... | 5 | [
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perpendicular, slope and y-intercept
March 22nd 2007, 02:13 AM #1
perpendicular, slope and y-intercept
1. Write the equation of the line which has y-intercept (0, 5) and is perpendicular to the line with equation y = –3x + 1.
2. Write the equation of the line that passes through point (–7, 9) with a slope... | 4 | [
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How to prove the Newton's third law.
If we already know about conservation of momentum, it's easy. Let two objects be initially at rest. Let the two objects be an isolated system -- they may begin to exert forces on each other, but no
forces on them come from outside. Let one object begin to exert force F1 on the other... | 4 | [
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Implementing Subdivision Surface Theory
In my previous article "Subdivision Surface Theory", I explained what subdivision surfaces were and why game developers should be interested in them. I also covered a couple different kinds of
subdivision surfaces in their mathematical forms and briefly discussed their benefits a... | 4 | [
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Modelling a maximising problem
January 18th 2011, 07:48 AM #1
Junior Member
Joined
Sep 2010
Posts
64
Modelling a maximising problem
Hi, I am completely lost with this problem...
The UN wishes to determine the composition of 1000 identical food parcels, each of which is to be packed into a 20 litre c... | 4 | [
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Applications of circular functions.
July 8th 2008, 03:44 PM #1
Banned
Joined
Jul 2008
Posts
29
Applications of circular functions.(is this to hard because its a graphing question)
1) A bicycle tire with radius 33cm rotates at a rate of 5 revolutions per second. The top of the valve stem is located 7cm ab... | 4 | [
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Parallelograms & Quadrilaterals
October 26th 2013, 06:40 PM #1
Junior Member
Joined
May 2013
From
California
Posts
71
Thanks
1
Parallelograms & Quadrilaterals
Hey Guys!
For NUMBER 9)
I'm trying to find the answer but I don't know how to set up this equation.
Since Angle A = Angle ... | 4 | [
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differential equation
July 6th 2008, 05:48 PM
lord12
differential equation
solve dy/dx = (y^2)(e^2y), y(0) = 1.
e^2y = x
lnx = 2y.
lnx/2 = y
dy/y^2 = (0.5)(lnx)dx
-y^-1 = (.5)(xlnx-x) + C
C = -1
y = -2/(xlnx -x -1)
Is this correct?
Im stuck here since lnx is not determi... | 5 | [
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Substitution method
April 22nd 2013, 08:05 PM
alexander9408
Substitution method
Given that the differential equation dy/dx = (x+y+2)/(x+y+1), by using a suitable substitution to reduce it to a differential equation with separable variable.
How do I get a suitable substitution for this? Any method can be used... | 5 | [
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counting problem
March 16th 2010, 05:39 AM #1
Member
Joined
Jul 2006
Posts
90
counting problem
How do I show that 8 people played in the tournament to the following problem:
At a chess tournament, each person played exactly 1 game with every other person. 28 games were played. How many people played ... | 4 | [
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Patent US5513235 - Integrated circuit thermometer
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation of U.S. application Ser. No. 08/013,883, now U.S. Pat. No. 5,388,134, filed Feb. 5, 1993. The following U.S. patent application assigned to the assignee of the present
application disclose related subject m... | 4 | [
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Equation of line
June 28th 2010, 05:43 AM #1
Equation of line
Find the equation of the line through M (-1,2) with gradient m if M is the midpoint of the intercepts of the x axis and y axis
equation of line = y - y1 = m ( x - x1)
what next I am confused with the midpoint of axis.
Thanks
Hello J... | 4 | [
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Maxwell's Stress Tensor
Consider an infinite parallel plate capacitor with the lower plate (at z=-d/2) carrying the charge density[tex]- \sigma [/tex] and the upper plate (at z=d/2) carrying the charge density [tex]\sigma[/
tex].
Determine all nine elements of the stress tensor in the region between the plates. Displa... | 4 | [
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Intersection of orthogonal planes
January 31st 2011, 01:35 AM #1
Member
Joined
Jan 2011
Posts
87
Intersection of orthogonal planes
Hello, I have been trying to tackle vectors over the weekend, but cant seem to get this one right. I have two lines, s(1,2,1) and (9,6,0) + t(0,1,-1). The orthogonal vector i... | 5 | [
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gnuplot demo script:
gnuplot demo script: random.dem
autogenerated by webify.pl on Tue Mar 6 11:37:56 2007
gnuplot version gnuplot 4.3 patchlevel CVS-14Feb2007
#
# $Id: random.dem,v 1.12.2.1 2006/10/23 05:43:30 sfeam Exp $
#
# random.dem
#
# Lattice test for random numbers;
# If you can see any patterns in this plot... | 5 | [
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Simple Examples
1.2 Simple Examples
The following chapters describe all of Octave’s features in detail, but before doing that, it might be helpful to give a sampling of some of its capabilities.
If you are new to Octave, I recommend that you try these examples to begin learning Octave by using it. Lines marked like ... | 5 | [
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Can anyone explain this?
March 9th 2009, 05:38 PM
ninano1205
Can anyone explain this?
Joint density h(z1,z2) can be factored out as g(z1)q(z2)
then z1 and z2 are indepent without finding marginals.
Why is that?
March 9th 2009, 08:20 PM
mr fantastic
Quote:
Read page 11: http://www.colorado.ed... | 5 | [
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algebra help
May 29th 2012, 05:33 AM
Mat724
algebra help
an equation is shown.
[the square root of (x^2-t^2)] = 2t-x
If x and t are positive numbers that satisfy the equation above, what is the value of (x/t)?
May 29th 2012, 06:43 AM
Reckoner
Re: algebra help
Quote:
$\sqrt{x^2-t^2}=2t-x$
... | 4 | [
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Calculus of Variation
UltrafastPED
Because there is no algebraic relation between a function and its derivative.
This is why you need boundary conditions to solve differential equations.
Sorry, but this is a bogus answer. A function may depend on another function non-algebraically, and that is perfectly fine as fa... | 4 | [
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Simple one on first-order linear DEs
April 23rd 2008, 11:30 AM
emttim84
Simple one on first-order linear DEs
Alright, I know this is a simple exponent issue, but I can't remember if it's $x^2$ or $2x$ in this case so bear with me.
The problem states to find the particular solution that satisfies the initial... | 4 | [
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#
# STATISTICAL TIME SERIES ANALYSIS (STSA) module for O-Matrix.
#
# Written by Dr. Dimitrios D. Thomakos
# University of Peloponesse
# e-mail: thomakos@uop.gr
#
# STSA Version 2.0
#
# Example file #17
#
# In this file the following functions are demonstrated:
#
# acvf_spectrum
# ar_order
# ar_spectrum
... | 4 | [
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Klein four-group geometry
P: 205
Klein four-group geometry
Maybe its more than the Klein four group.
Wiki:
"The divisors of 24 — namely, {1, 2, 3, 4, 6, 8, 12, 24} — are exactly those n for which every invertible element x of the commutative ring Z/nZ satisfies x^2 = 1.
Thus the multiplicative group (Z/24Z)× = {±1, ... | 4 | [
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Physics Forums - View Single Post - Algebraic closure of finite field
Sci Advisor
HW Helper
P: 9,397
EDIT: forgot to say, this is in response to another thread which had wandered way off its original question. Arguably this could be in at least 3 other forums
end EDIT
EDIT contains some gross errors, will correct ... | 4 | [
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How do I prove this? (summation problem)
$$\sum_{i=1}^{n} x_i^2 > \frac{1}{n^2}(\sum_{i=1}^{n} x_i)^2$$
Note: each x_i is any observation (or statistic) it can be any real number and need not be constrained in anyway whatsoever, though you can take n > 1 and integer (i.e. there is at least two
observations and the num... | 4 | [
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0.03... | 14,723 | 14723 | |
Solve the system
Solve the system $<br /> x^2-4\sqrt{3x-2}+6=y$ $<br /> y^2-4\sqrt{3y-2}+6=x<br />$
There is an obvious solution x = y = 2. In fact, this is the only solution. To see why, let $f(x) = x^2-4\sqrt{3x-2}+6$ (defined for x ≥ 2/3). The function f(x) – x has a minimum value of 0 at x=2
(calculus exercise). H... | 5 | [
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Fourth order Runge–Kutta in C# - two differential equations
Okay, I've just worked out the math, so here goes.
If I've understood everything correctly, what you would need to do is introduce two extra variables in your class:
Y (to keep track of the surface) and
t (to keep track of time).
Furthermore you would have... | 4 | [
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... | 14,725 | 14725 | |
group
Context
Supergeometry
and
Formal context
Superalgebra
Supergeometry
Structures
Applications
Contents
Bare super groups
(…)
Super Lie groups
Definition
A super Lie group is a group object in the category SDiff of supermanifolds, that is a super Lie group.
In terms of generalized group elements
One u... | 4 | [
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Test for Population Mean (small sample size)
Test for Population Mean (small sample size).
If the sample size is small (Student's t distribution and associated statistics can be used to determine a test for whether the sample mean = population mean.
That is, when the sample size is less than 30 we can use the student... | 5 | [
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0.0966796875,
-0.0556640625,
0.0859375,
0.07421875,
-0.04296875,
0.010986328125,
-0.057373046875,
-0.00787353515625,
-0.08984375,
0.04296875,
-0.0830078125,
... | 14,727 | 14727 | |
Uniform convergence
August 17th 2009, 01:53 PM #1
Uniform convergence
Hi!
Problem: Show that $f_{n}(x)=nx^{n}(1-x)$ converges "pointwise", donīt know if this is the correct english word for it. And show that the convergence is not uniform on $[0,1]$ .
Solution:
Itīs easy to find that $f_{n}(x) \to ... | 5 | [
0.03515625,
-0.0108642578125,
-0.012451171875,
0.0028076171875,
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0.0625,
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0.006500244140625,
-0.1171875,
0.... | 14,728 | 14728 | |
Lifetime Distribution of a parallel system
August 24th 2009, 08:32 PM #1
Newbie
Joined
Apr 2009
Posts
3
Lifetime Distribution of a parallel system
Suppose under normal operating conditions the operating time in days until failure of a certain type of component has an exponential distribution with mean La... | 5 | [
-0.0546875,
-0.01202392578125,
0.034912109375,
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... | 14,729 | 14729 | |
Problem with simple linear algebra exercise
February 3rd 2010, 08:22 AM #1
Junior Member
Joined
Oct 2009
Posts
34
Problem with simple linear algebra exercise
Good day to all. I apologize if the question asked appears to be a waste of time but it has created some problems for me. In one of my end of chapt... | 5 | [
-0.056396484375,
0.0016632080078125,
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0.0... | 14,730 | 14730 | |
Series and Sequences
August 15th 2006, 01:33 PM #1
Newbie
Joined
Jul 2006
From
Cape Town, RSA
Posts
17
Need some help with these plz x/
1) The 10th term of an arithmetic sequence is 30 and the sum of the first six terms is 3. Calculate the first three terms of the sequence.
2) The expression... | 4 | [
-0.053955078125,
0.01708984375,
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0.02197265625,
0.049072265625,
0.... | 14,731 | 14731 | |
Physics Forums - View Single Post - Inverted pendulum
1. The problem statement, all variables and given/known data
I was reading a book and it had this problem:
"The input u is an acceleration provided by the control system and applied in the horizontal direction to the lower end of the rod. The horizontal displacem... | 4 | [
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... | 14,732 | 14732 | |
easy question
September 6th 2008, 01:35 PM #1
Banned
Joined
Apr 2008
From
Concepción, Chile
Posts
10
easy question
Let $M$ a metric space and $z,x\in M$, $d$ a metric on $M$
If i have $d(z,x)<\epsilon , \forall \epsilon > 0$
is true that $z=x$ ?
if this is true, how i can prove that?
... | 4 | [
-0.051513671875,
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Conditional Probability Brain Teaser
September 23rd 2009, 08:55 AM #1
Newbie
Joined
Sep 2009
Posts
6
Conditional Probability Brain Teaser
A sock contains 2 red marbles and an unknown number of blue marbles. Tom places a new marble in the sock. Jason puts his hand in the sock and pulls out a red marble.
... | 5 | [
-0.04833984375,
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0.001800537109375,
-0.025268... | 14,734 | 14734 | |
Confidence Intervals
July 30th 2008, 08:26 PM
sebchase0625
Confidence Intervals
I have read and re-read the chapter on confidence intervals but I can't seem to grasp the concept. Please help!!
During the Rose Bowl, the length (in seconds) of 12 randomly chosen commercial breaks during timeouts (following t... | 5 | [
0.0084228515625,
0.0301513671875,
0.078125,
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Patent US4064379 - Logarithmic echo canceller
BACKGROUND OF THE INVENTION
The present invention is in the field of echo cancellers and in particular is an improved echo canceller using a logarithmic format to simplify the hardware of the canceller.
It is well known that hybrid circuits connecting two-wire to four-wir... | 4 | [
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... | 14,736 | 14736 | |
Cycle of generalized eigenvectors disjoint
December 3rd 2009, 06:27 PM
Last_Singularity
Cycle of generalized eigenvectors disjoint
Question: Let $\gamma_1,...,\gamma_p$ be cycles of generalized eigenvectors of a linear operator $T$ with respect to eigenvalue $\lambda$. Prove that if the initial eigenvectors are ... | 4 | [
0.0034942626953125,
0.030029296875,
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-0.034423828125,
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0.028076171875,
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0.049072265625,
0.0869140625,
0.05126953125,
-0.03271484375,
-0.080566... | 14,737 | 14737 | |
Inequalities
Solve the inequality. State the solution set using interval notation and graph. x-3/x+4>7 x^2-5x-7<0
pashah Hello, pashah, I assume that your first problem reads: $\frac{x-3}{x+4}>7$ Multiply by denominator. The next steps depends on the sign of the denominator! $x-3>7x+28 \ \wedge\ x>-4$ $-31>6x \
\wedge... | 4 | [
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Posts about MaBloWriMo on Delta Epsilons
Posted by Akhil Mathew in analysis, functional analysis, MaBloWriMo.
Tags: convex sets, Hahn-Banach theorem, hyperplane separation theorem, linear functionals, Muntz approximation theorem
5 comments
I have been finishing my MaBloWriMo series on differential geometry with a proo... | 4 | [
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0.0751953125,
0.03125,
-0.023... | 14,739 | 14739 | |
Series with repeating decimal
October 13th 2008, 10:28 AM
redman223
Series with repeating decimal
10.9090909091.....
I don't really know what to do with this problem, I know that I should set it up like this:
$<br /> \frac{1090}{100} + (\frac {1090}{100}* \frac {1}{100})+ (\frac {1090}{100}*(\frac{1}{1... | 4 | [
-0.1220703125,
0.01904296875,
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0.11083984375,
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-0.006195068359375,
... | 14,740 | 14740 | |
Total Differential Problem
June 1st 2012, 12:33 PM
econolondon
Total Differential Problem
Hi
I am trying to get the total differential for
y = x[1]x[2]/2x[1] + x[2]
I have been given the answer
dy = [x[2]/2x[1] + x[2]]dx[1] - [2x[1]x[2]/(2x[1]+x[2])^2]dx[1] + [x[1]/2x[1] + x[2]]dx[2 ]- [x[1]x... | 5 | [
-0.0252685546875,
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0.07275390625,
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0.033935546875,
-0.0556640... | 14,741 | 14741 | |
differentiability proof
April 10th 2010, 05:25 PM
234578
differentiability proof
a)
Suppose f(x)=xg(x) for some function g which is continuous at 0. Prove that f is differentiable at 0 and find f'(0) in terms of g.
b)
Suppose f is differentiable at 0 and that f(0)=0, prove that f(x)=xg(x) for some f... | 5 | [
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... | 14,742 | 14742 | |
Fitting a cylinder inside a cone
March 18th 2009, 07:45 PM #1
Fitting a cylinder inside a cone
So I think this is a related rates problem though i am not sure. I am in calculus AB.
A right circular cone has base radius 5 and altitude 12. A cylinder is to be inscribed in the cone so that the axis the cylinder... | 5 | [
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-0.04736328125... | 14,743 | 14743 | |
Nilpotent Groups w/ Normal Subgroups
November 28th 2009, 07:59 PM #1
Nilpotent Groups w/ Normal Subgroups
Hello. I have been asked to prove the following:
If $N$ is a nontrivial normal subgroup of a nilpotent group $G$, then $N \cap Z(G)$ is nontrivial.
I attempted to take the factor group $G/N$ (since ... | 5 | [
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0.03515625,
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Maximum and Minimub values need help!
March 27th 2010, 03:28 PM #1
Newbie
Joined
Sep 2008
Posts
23
Maximum and Minimub values need help!
Need help with this question, dunno what to do. Please help me
The position function of an object that moves in a straight line is $s(t)=1+2t - \frac {8}{t^2+1}, 0... | 5 | [
0.00799560546875,
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-0.000034570693... | 14,745 | 14745 | |
One More Complex Analysis Problem
December 18th 2006, 10:45 AM #1
Member
Joined
Dec 2006
Posts
79
One More Complex Analysis Problem
Here is another Complex problem I can't figure out
If f is analytic for │z│≤1 show that
∫D f(x+iy) dx dy = f(0)pi
D = {(x,y) : x² + y² ≤ 1}
Tha... | 5 | [
-0.1025390625,
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-0.018310546875,
... | 14,746 | 14746 | |
Math Riddle | 17 Jul 2009
Oh, I see .. looks like
shabbir
referred to this thread (from Physics Forum) for the answers :
http://www.physicsforums.com/showthread.php?t=315700
.
But, the correct answers are not 3, -2, -1.
The answers are :
x= 2 cos (20)
y= 2 cos (140)
z= 2 cos (260)
Probably
shabbir
didn't r... | 5 | [
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-0.034912109375,
-0.09912109375,... | 14,747 | 14747 | |
Combination Kinematics Problem - Quadratic Formula
March 16th 2010, 03:20 PM #1
Member
Joined
Jun 2009
Posts
86
Combination Kinematics Problem - Quadratic Formula
About 3 weeks ago I posted here because I needed help for a bonus question. Though I was told that I would need to do this myself due to it be... | 4 | [
-0.00124359130859375,
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0.0654296875... | 14,748 | 14748 | |
Family of curves on a surface (Differential geometry)
May 11th 2008, 04:09 PM #1
Newbie
Joined
Mar 2008
Posts
1
Family of curves on a surface (Differential geometry)
Here is a question i am not sure how to tackle, I am not familiar with how to deal with family of curves and don't really have much time to... | 4 | [
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Réunion d'hiver 2000 de la SMC
Algebraic Geometry / Géométrie algébrique
(Peter Russell, Organizer)
T. ASANUMA, Toyama University Facuty of Educat... | 4 | [
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0.00142669677... | 14,750 | 14750 | |
MathGroup Archive: May 2001 [00469]
[Date Index] [Thread Index] [Author Index]
Re: Showing intermediate steps in calculations
• To: mathgroup at smc.vnet.net
• Subject: [mg29049] Re: [mg29019] Showing intermediate steps in calculations
... | 5 | [
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0.00988... | 14,751 | 14751 | |
Tough question - Coordinate geometry.
August 5th 2009, 03:30 AM
cyanide911
Tough question - Coordinate geometry.
Quote:
Six points are taken at a circle centered at the origin, such that the mean if it's abcissas is 4/3 and that of it's oordinates is 2/3. Line joining the orthocenter of a triangle formed by... | 4 | [
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0.042724609375,
-0.06835937... | 14,752 | 14752 | |
Nonnegative Mixed-Norm Convex Optimization for Mitotic Cell Detection in Phase Contrast Microscopy
Computational and Mathematical Methods in Medicine
Volume 2013 (2013), Article ID 176272, 10 pages
http://dx.doi.org/10.1155/2013/176272
Research Article
Nonnegative Mixed-Norm Convex Optimization for Mitotic Cell Detec... | 4 | [
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0.0966796875,
-0.12890625,
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0.01318359375,
-0.007293701... | 14,753 | 14753 | |
Summation division
February 3rd 2013, 10:41 AM
MN1987
Summation division
Simple question. If you have a fraction where:
numerator = summation of Xi terms
denominator = summation of Xi^2 terms
Do standard rules of arithmetic apply? So that it equals the summation of 1/Xi ?
February 3rd 2013, 10:51 ... | 4 | [
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0.01806640625,
0.0412... | 14,754 | 14754 | |
[SOLVED] Proving sinz/z--->1 for complex numbers.
December 5th 2008, 09:13 AM #1
Member
Joined
May 2008
Posts
86
[SOLVED] Proving sinz/z--->1 for complex numbers.
Hi everybody, thanks for reading.
I'm having trouble proving lim(sinz/z) = 1 |z-->0.
I tried using the definition with epsilons ... | 5 | [
-0.07763671875,
0.10107421875,
-0.0380859375,
-0.0211181640625,
0.033447265625,
0.00616455078125,
-0.00909423828125,
-0.0703125,
-0.03515625,
-0.01904296875,
0.002716064453125,
-0.01397705078125,
0.04443359375,
0.09765625,
-0.0167236328125,
-0.0712890625,
0.044189453125,
-0.0485839... | 14,755 | 14755 | |
Solving this inequality
28(pi^3)/12x^2 is less than 0.00001 I keep trying different things but getting stuck an suggestions?
Multiply through by 12x² and I will say the rhs is 10^-5 to make it easier to read. $28\pi^3 < 12 \times 10^{-5} x^2$ $x^2 > \frac{28 \pi^3}{12 \times 10^{-5}}$ $x^2 > \frac{7\pi^3}{3} \times 10... | 5 | [
-0.006256103515625,
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-0.0302734375,
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-0.1083984375,
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-0.0380859375,
0.0869140625,
0.03271484375,
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0.00176239013671875,
0.0108642578125,
0.0986328125,
0.031982421875,
0.08056640625,
-0.01416015625,
0.04052734375,
-0.0069885253906... | 14,756 | 14756 | |
Change of coordinate matrix, new basis
July 11th 2011, 07:23 PM
AlexP
Change of coordinate matrix, new basis
I've been working on the following problem:
"Let $V$ be a finite-dimensional vector space over a field $F$, and let $\beta=\{x_1, ..., x_n\}$ be an ordered basis for $V$. Let $Q$ be an $n\times n$ in... | 4 | [
-0.04248046875,
0.0230712890625,
0.048828125,
0.013427734375,
0.0108642578125,
0.0908203125,
0.0673828125,
-0.03515625,
0.061767578125,
0.0147705078125,
-0.0498046875,
0.05029296875,
-0.044189453125,
0.00185394287109375,
-0.04833984375,
0.07177734375,
-0.01141357421875,
0.037109375... | 14,757 | 14757 | |
Problem understanding question
May 12th 2013, 09:15 PM
Paze
Problem understanding question
I have a problem:
1. Find two positive numbers whose sum is 300 and whose product is a maximum.
What I don't understand is that last constraint: ''is a maximum''. What do they mean by a product being a maximum? T... | 4 | [
-0.045654296875,
-0.0390625,
-0.05712890625,
-0.1396484375,
-0.01226806640625,
0.0693359375,
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0.05078125,
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0.0400390625,
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0.0196533203125,
0.12890625,
0.041015625,
-0.059326171875,
-0.... | 14,758 | 14758 | |
Function Word Problem
February 11th 2008, 07:11 PM #1
Junior Member
Joined
Mar 2007
Posts
38
Function Word Problem
A new set of car tires has a tread depth of 8 millimeters. The tread depth decreases 0.12 millimeters per thousand miles driven. Write an equation that gives the tread depth as a function of... | 4 | [
-0.054443359375,
0.0220947265625,
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0.1953125,
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0.0137939453125,
0.02490234375,
-0.0274658203125,
0.1015625,
0.0189208984375,
0.0155029296875,
... | 14,759 | 14759 | |
Modern Physics/Waves in Spacetime
Applications of Special RelativityEdit
In this chapter we continue the study of special relativity by applying the ideas developed in the previous chapter to the study of waves.
First, we shall show how to describe waves in the context of spacetime. We then see how waves which have n... | 4 | [
-0.107421875,
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0.031005859375,
0.03076171875,
-0.0311279296875,
0.055908203125,
0.047607... | 14,760 | 14760 | |
Find Exact Value of Each Expression
Find exact value of each expression. (1) sin[2arcsin(sqrt{3}/2)] (2) cos^2[1/2arcsin(3/5)]
$\sin(2x)=2 \sin(x) \cos(x)$ Here, $x=\arcsin \left(\frac{\sqrt{3}}{2}\right)$ Remember the formula $\cos(\arcsin(x))=\sqrt{1-x^2}$ ----> $\sin \left(2 \arcsin \left(\frac{\sqrt{3}}{2}\right) ... | 4 | [
-0.024658203125,
-0.033447265625,
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0.021728515625,
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0.060791015625,
0.0380859375,
-0.00897216796875,
-0.0576171875,
-0.01055908203125,
0.04150390625,
0.054931640625,
0.002777099609375,
0.0238037109... | 14,761 | 14761 | |
Physics Question
October 11th 2009, 12:28 PM #1
Newbie
Joined
Sep 2009
Posts
21
Physics Question
1) A missile is shot from the ground with an initial speed of 2,500 m/s at an angle of 40 degrees. Find how high the missile reaches, the time in the air, and horizontal range.
2) If the missile was shot... | 4 | [
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0.045654296875,
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0.0235595703125,
0.06591796875,
-0.01116943359375,
0.007... | 14,762 | 14762 | |
Somewhat physics...
July 30th 2007, 02:45 PM #1
Newbie
Joined
Jul 2007
Posts
19
A construction worker drops a bolt while working on high-rise building 320 m above the ground. After t seconds, the bolt has fallen a distance of s metres, where s(t)= 5t^2, 0 < (or equal to) t <
(or equal to) 8. The funct... | 4 | [
-0.060791015625,
0.07275390625,
0.040771484375,
-0.027587890625,
0.0269775390625,
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0.1328125,
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0.0205078125,
0.03955078125,
-0.03125,
0.022705078125,
-0.0137939453125,
0.016845703125,
-0... | 14,763 | 14763 | |
Rational equations?
December 11th 2010, 01:39 PM #1
Senior Member
Joined
Dec 2010
From
CPT
Posts
302
Rational equations?
I am having difficulty solving this equation
solve the rational equation
(-4)/(x-1)=7/(2-x)+3/(x+1)
Please help me.
So far I got used the least common factor of 2 a... | 4 | [
-0.049560546875,
-0.008544921875,
0.0224609375,
0.05810546875,
0.006103515625,
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0.0269775390625,
-0.0213623046875,
-0.07568359375,
0.033447265625,
-0.11767578125,
0.087890625,
0.0595703125,
-0.0908203125,
0.004913330078125,
-0.019775390625,
-0.06... | 14,764 | 14764 | |
Continuity equation, cartisan to polar
Unfortunately vector calculus doesn't work that way. If you're trying to convert from cartesian coordinates then you need to work in terms of the vector derivative operator [itex]\nabla[/itex] or you
will get things wrong.
The continuity equation is
[tex]\frac{\partial \rho}{\par... | 4 | [
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0.0234375,
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0.10009765625,
0.01806640625,
0.00738525390625,
-0.064453125,
-0.001907... | 14,765 | 14765 | |
Understanding logic of proof
September 9th 2009, 05:42 PM #1
Member
Joined
Jan 2008
Posts
175
Understanding logic of proof
Prove: If $x^2 + x - 6 \geq 0$, then $x \leq -3$ or $x \geq 2.$
Im not understanding the logic behind this questions answer. My professor went ahead and:
Suppose that $x^2... | 4 | [
-0.01092529296875,
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0.0179443359375,
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0.028076171875,
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0.05712890625,
-0.05126953125,
0.05615234375,
0.0194091796875,
0.0172119140625,
-0.... | 14,766 | 14766 | |
Integral of 1/x
bp_psy
First use the limit definition of a derivative on ln(x) to show that dln(x)/dx=1/x then use the fundamental theorem of calculus to show that the antiderivative of 1/x is ln(x).
Agreed. Using the rule for other exponents here gives us an undefined integral. Does this mean the integral of 1/x i... | 4 | [
-0.06494140625,
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0.09765625,
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0.0322265625,
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0.0703125,
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0.043212890625,
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0.017333984375,
-0.00274658203125,
-0.05151... | 14,767 | 14767 | |
G simple, f homomorphism from G to H. If A normal in H and |H:A|=2 then f(G) < A.
June 4th 2013, 08:39 PM #1
Member
Joined
Feb 2009
Posts
138
G simple, f homomorphism from G to H. If A normal in H and |H:A|=2 then f(G) < A.
Hi: This is a rather elementary problem. Anyway, it is this: Let G be a simple ... | 5 | [
0.049560546875,
0.07470703125,
0.11865234375,
0.022705078125,
0.056396484375,
-0.00732421875,
0.0274658203125,
0.0107421875,
-0.059814453125,
-0.033447265625,
0.0361328125,
-0.068359375,
-0.0159912109375,
-0.07373046875,
-0.0020599365234375,
0.01409912109375,
-0.06005859375,
0.0119... | 14,768 | 14768 | |
Patent US7224838 - Method and apparatus for recovery of encoded data using central value
This application is a continuation application of Ser. No. 09/342,296, filed Jun. 29, 1999 now U.S. Pat. No. 6,549,672.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to encoding of data to p... | 4 | [
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0.08349609375,
-0.01324462890625,
-0.052734375,
-0.03564453125,
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0.0166015625,
-0.000667572021484375,
-0.0026397705078125,
0.005950927734375,
-0.028564453125,
0.126953125,
0.0625,
-0.07177734375,
-0.06640625,
-0.076171875,
-0.006134033203125,
0.0908... | 14,769 | 14769 | |
Physics Forums - View Single Post - Covariant and Contravariant Tensors
Sci Advisor
HW Helper
PF Gold
P: 4,772
I believe that the words covariant and contravariant refer to the way the components of the vector change with respect to the coordinates system. Suppose [itex](x^1,\ldots,x^n)[/itex], [itex](\tilde
{x... | 4 | [
-0.00799560546875,
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0.03515625,
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0.056884765625,
0.019287109375,
0.095703125,
-0.0208740234375,
-0.00836181640625,
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0.00933837890625,
0.03564453125,
-0.03076171875,
0.0103759765625,
0.0096435546875,
0.055419921875,
-0.01904296875,
0.092... | 14,770 | 14770 | |
separate the variables....
January 30th 2011, 12:52 AM #1
Senior Member
Joined
Aug 2009
Posts
349
separate the variables....
dp/dt = P - P^2
ok i am supposed to separate the variables. im having a rough time with this problem..i know to get the p on one side and the dt on the other, and then i used ... | 5 | [
-0.0118408203125,
0.0269775390625,
0.1279296875,
0.030029296875,
0.0191650390625,
-0.0269775390625,
-0.01361083984375,
-0.0244140625,
0.039794921875,
0.044677734375,
0.0267333984375,
0.046630859375,
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0.07275390625,
-0.046142578125,
-0.04736328125,
-0.06201171875,
0.... | 14,771 | 14771 | |
Patent US4999799 - Signal processing apparatus for generating a fourier transform
BACKGROUND OF THE INVENTION
This invention relates to high speed signal processing circuits and more particularly to special purpose VLSI coprocessing circuits for performing Fourier analysis and synthesis.
Spectacular advances have bee... | 4 | [
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0.0732421875,
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-0.05126953125,
0.0419921875,
0.0573... | 14,772 | 14772 | |
Orthogonal complement
May 11th 2011, 03:30 PM #1
Junior Member
Joined
May 2011
Posts
28
Orthogonal complement
Let V denote the real vector space M_(n,n) (R) of n by n matrices with real entries and let S denote the subspace of all n by n symmetric matrices in V (i.e. such that A=A transpose).
---- D... | 5 | [
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0.08349609375,
0.039... | 14,773 | 14773 | |
UBS - What's the square root of 2000?
UBS
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Learn More
.
UBS Sales and Trading Interview Question
"What's the square root of 2000?"
Part of a Sales a... | 4 | [
0.00958251953125,
0.009033203125,
-0.0234375,
0.0172119140625,
-0.05029296875,
-0.046142578125,
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0.053955078125,
-0.0101318359375,
0.004425048828125,
-0.01080322265625,
0.01416015625,
0.06591796875,
0.0576171875,
-0.0235595703125,
0.076171875,
0.0181884765625,
0.0488... | 14,774 | 14774 | |
Transformations
January 22nd 2009, 06:09 PM #1
Newbie
Joined
Jan 2009
Posts
1
Transformations
How would you solve this question:
The graph of y=f(x) is expanded vertically about the line y=k by a factor of 5. The point (-3,2) on the graph of y=f(x) has its image under the transformation at the point... | 4 | [
-0.0198974609375,
0.0478515625,
-0.007476806640625,
-0.11962890625,
0.005767822265625,
-0.024658203125,
0.0198974609375,
-0.0052490234375,
0.0164794921875,
0.048095703125,
0.11279296875,
-0.00179290771484375,
-0.0203857421875,
0.0458984375,
0.033935546875,
0.0303955078125,
-0.046875,... | 14,775 | 14775 | |
Stability and Hopf Bifurcation Analysis of Coupled Optoelectronic Feedback Loops
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 918943, 11 pages
http://dx.doi.org/10.1155/2013/918943
Research Article
Stability and Hopf Bifurcation Analysis of Coupled Optoelectronic Feedback Loops
^1Department of Mathem... | 5 | [
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-0.12255859375,
0.0205078125,
-0.0693359375,
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0.02197265625,
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0.05615234375,
0.103515625,
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-0.044189453125,
-0.029296875,
0.0859375,
-0.0439453125,
0.01220703125,
0.00... | 14,776 | 14776 | |
fundamental in probability & convergence with probability 1
February 22nd 2010, 07:52 AM
cribby
fundamental in probability & convergence with probability 1
I am trying to understand a proof that if $\{X_n\}$ is fundamental in probability, then there exists a subsequence and a random variable $X$ such that the su... | 4 | [
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0.056640625,
-0.0603027... | 14,777 | 14777 | |
write the equation
of a sphere witha center (1,4,-3) and tangent to the xz plane
Hello, tiga killa! Quote: Write the equaton of a sphere with center (1,4,-3) and tangent to the xz-plane We have the center . . . we just need the radius, right? Can you visualize the sphere? . . If
it is tangent to the xz-plane, the radi... | 4 | [
-0.000957489013671875,
0.055908203125,
-0.06005859375,
-0.0257568359375,
0.0634765625,
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0.00579833984375,
-0.08056640625,
0.0240478515625,
0.03442... | 14,778 | 14778 | |
Simple partial differential equation
dexter90
Hello.
I have equation:
[tex]\frac{\partial T}{\partial t}-\frac{1}{2}\cdot \frac{(\partial)^2 T}{\partial x^2}=0[/tex]
I calculated determinant:
[tex]\Delta=(-\frac{1}{2})^2)-4\cdot 1 \cdot 0 \Rightarrow \sqrt{\Delta}=\sqrt{2} \\ (\frac{dT}{dt})_{1}=-\sqrt{2} \\ (\f... | 5 | [
-0.0164794921875,
-0.0238037109375,
0.07861328125,
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0.01483154296875,
0.0203857421875,
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-0.017578125,
0.033203125,
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-0.0137939453125,
-0.0252685546875,
... | 14,779 | 14779 | |
Simple Convergence limit
December 1st 2011, 11:13 AM #1
Simple Convergence limit
Hey, I'm trying to show that the following sequence of functions
$f_n(x)=\sum_{k=1}^{n}\frac{1}{(x+k)^2}$
converges uniformly on $\mathbb{R}^+$.
To do that I'm trying to find the limit of the simple convergence of the se... | 4 | [
0.025146484375,
0.00775146484375,
0.00494384765625,
-0.00048828125,
0.033935546875,
0.0390625,
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-0.01495361328125,
-0.0179443359375,
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0.07470703125,
-0.005157470703125,
-0.04052734375,
-0.078125,
-0.15234375,
0.1142578125,
-0.041503906... | 14,780 | 14780 | |
Uniqueness Theorems on Difference Monomials of Entire Functions
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 407351, 8 pages
http://dx.doi.org/10.1155/2012/407351
Research Article
Uniqueness Theorems on Difference Monomials of Entire Functions
^1Shandong Transport Vocational College, Weifang, Shandon... | 5 | [
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-0.045654296875,
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-0.06689453125,
-0.06005... | 14,781 | 14781 | |
Patent US7637167 - Apparatus and method for characterizing two phase fluid flow
CROSS-REFERENCE TO RELATED APPLICATION
This application is related to application Ser. No. 12/109,848 filed Apr. 25, 2008, entitled “Method, Apparatus and System for Characterizing Two Phase Fluid Flow in an Injection Well”.
BACKGROUND OF... | 4 | [
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0... | 14,782 | 14782 | |
Show that power set is a sigma-algebra
Hi
Let $\Omega$ be a finite set. Show that the set of all subsets of $\Omega$, $2^{\Omega}$, is also finite and that it is a $\sigma$-algebra.
Solution (?)
Since $\Omega$ is finite, $\exists$$n \in \mathbb{N}$ such that $card(\Omega) \leq n$. From set theory we ... | 5 | [
0.08349609375,
0.033935546875,
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0.011474609375,
0.08544921875,
-0.0023193359375,
-0.025268... | 14,783 | 14783 | |
Canonical transformation
1. The problem statement, all variables and given/known data
Consider a canonical transformation with generating function
[tex]F_2 (q,P) = qP + \epsilon G_2 (q,P)[/tex],
where [tex]\epsilon[/tex] is a small parameter.
Write down the explicit form of the transformation. Neglecting terms of o... | 4 | [
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0... | 14,784 | 14784 | |
Vector Valued Function Problem
October 17th 2009, 05:07 PM #1
Newbie
Joined
Oct 2009
Posts
3
Vector Valued Function Problem
If someone could help me with this problem, I would greatly appreciate the help. I believe I have the solution to the first part, but I'm not sure about the second part.
"Show ... | 5 | [
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Find an impossibly found root algebraically in this equation
I have this equation x^{(x^2-3x)}=x^2 I've found all roots except x = -1. Can somebody help me?
Oops, I don't know how I could have gotten my factorisation wrong, sorry... \displaystyle \begin{align*} x^2 - 3x - 2 &= x^2 - 3x + \left(-\frac{3}{2}\right)^2 - ... | 4 | [
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0.... | 14,786 | 14786 | |
[SOLVED] Finding expected values and variance
February 23rd 2009, 01:58 PM #1
Member
Joined
Aug 2007
Posts
96
[SOLVED] Finding expected values and variance
Let x be a random variable with range [-1,1] and f(x). Find mu and the variance for |x|<1
part c) suppose f(x)= 1-|x|
I know the expected v... | 4 | [
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multiple roots
need help (x - 1)^3 - (x - 1)^2 = 0 Its really frustrating, please help.
A common factor is $(x-1)^2$. You can therefore rewrite the equations as: $(x-1)^2(x-1+1)=(x-1)^2x=0$ You should see that the solution has 2 distinct roots, with one repeated.
it should be $(x-1)^3-(x-1)^2 = (x-1)^2(x-1-1) = (x-1)... | 4 | [
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Strings of letters with exclusion
November 24th 2011, 08:06 PM #1
Junior Member
Joined
Nov 2011
Posts
53
Thanks
1
Strings of letters with exclusion
Say you had the String "RRYYYZZZZ". The number of distinct combinations you could arrange these is:
$\frac{9!}{2!3!4!}$
What if we didn't allow... | 5 | [
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0.000146865844726562... | 14,789 | 14789 | |
Find the limit of a recursion formula
June 1st 2009, 07:25 AM #1
Find the limit of a recursion formula
Hello,
I am looking at this recursion formula in my Calculus book.
x_n+1 = 1/2(x_n + 2/x_n)
It goes on to say that we can find the limit of this sequence by doing this:
L = 1/2(L + 2/L) fine
... | 4 | [
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Work-Energy Theorum: Spring potential energy vs Kinetic Energy
1. The problem statement, all variables and given/known data
A 1350-kg car rolling on a horizontal surface has a speed v = 40 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.5 m. What is the spring constant of the
... | 4 | [
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Patent US20030023651 - Quantum computation
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to U.S. provisional application No. 60/283,016, filed Apr. 11, 2001. The contents of that provisional application are incorporated herein by reference.
DISCUSSION OF THE BACKGROUND
[0002] 1. Fie... | 4 | [
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... | 14,792 | 14792 | |
So Lost ? Derivative of Exponential and Trig Functions.
May 5th 2013, 01:50 PM #1
Newbie
Joined
Apr 2013
From
Canada
Posts
13
If y=Acos(kt)+Bsin(kt) , where A, B and k are constants, show that d^2y/dx^2+K^2y=0
I just have no idea where to go with the question.
Help would really be appreciate... | 4 | [
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Summary: Physics 606, Quantum Mechanics, Exam 1
NAME________________________________
Please show all your work.
(You are graded on your work, with partial credit where it is deserved.)
All problems are, of course, nonrelativistic.
__________________________________________________________
1. In one dimension, a free pa... | 4 | [
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The Chain Rule, death to anyone that breaks the rule!
Galileo
It's just an application of the chain rule. See 'The Chain Rule (General version)' on page 793. You might as well consider x and y as functions x(x,y), y(x,y) and use that y is constant w.r.t. x (it
doesn't really depend on x). It looks weird, but in this w... | 4 | [
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Casio FX-570ES
Manual
Preview of first few manual pages (at low quality). Check before download. Click to enlarge.
Download (English)
Casio FX-570ES, size: 919 KB
Instruction: After click Download and complete offer, you will get access to list of direct links to websites where you can download this manual.
Ab... | 5 | [
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Need Mathematical Induction help - 3 questions
Need help with the following questions. http://i44.tinypic.com/66dwnb.png3 Thank you guys so much!
What have you done so far? Where are you stuck?
Well, I don't know where to begin for all three questions. In my worksheet these are the only 3 Mathematical Induction quest... | 5 | [
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Simple question about simple functions
I feel like this should be really easy, but for some reason I don't see how to finish it. I'm probably missing something obvious.
The integral of an integrable simple function ##f=\sum_{k=1}^n a_k\chi_{E_k}## is
$$\int f\,\mathrm{d}\mu=\sum_{k=1}^n a_k\mu(E_k),$$
where the right-... | 4 | [
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Newton Laws of motion question
Register to reply
by Pranav-Arora
Tags: laws, motion, newton
P: 3,806 1. The problem statement, all variables and given/known data
A rod AB is shown in figure. End A of the... | 4 | [
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