Thursday
November 27, 2014

Posts by Steven


Total # Posts: 489

statistics
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour fight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will fail? Show all steps ...
October 9, 2009

Quantum mechanics, eigenfunctions!
Thank you! I thought I was going crazy because I wasn't able to an eigenfunction since 1st deriv. would be = cos(x)*e^(ax) + a*sin(x)*e^(ax) which is definitely not an eigenfunction of the operator.
October 8, 2009

Quantum mechanics, eigenfunctions!
Determine if the function sin(x)*e^(ax) where a=constant is an eigenfunction of the operators d/dx and d^2/(dx)^2 Okay. My understanding is that you use the operator and perform its "thing" on the function. In this case, you will have to find the 1st derivative of ...
October 8, 2009

social studies
what imapct did the enstablishment of french and dutch coloies in north america have on native americans?
September 29, 2009

6th grade
How did Canadian Inuits make their decisions. Also did the have a leader or chief and how were they chosen
September 26, 2009

biology
identify what all organic compounds have in common,and list the four principal classes of or organic compounds
September 23, 2009

Physics AP C
Two trains, each having a speed of 22 km/h, are headed at each other on the same straight track. A bird that can fly 60 km/h flies off the front of one train when they are 70 km apart and heads directly for the other train. On reaching the other train it flies directly back to...
August 26, 2009

Fundamental Cornerstones of Managerial accounting
Green Enterprises produces small engines for lawn mowers. during the year, 110,000 engines were produced. The actual labor used was 60,000 hours at $9.50 per hour. Green has the following labor standard: 0.5 hour at $10 1. compute the labor rate variance. 2. compute the labor ...
July 30, 2009

Chemistry
Write the net ionic equation for silver nitrate and sodium chloride. I only know how to do it when it deals with elements, not compound.
July 23, 2009

math
x*y=50 x/y=2 10*5=50 10/5=2
July 19, 2009

math
A right triangle has a hypotenuse of length 3.00 m, and one of its angles is 30.0°. What are the lengths of (a) the side opposite the 30.0° angle and (b) the side adjacent to the 30.0° angle?
July 19, 2009

math
A painting measuring 100cm by 55cm is to be framed with a matte border of uniform width surrounding the painting. the combined area of the picture and the matte is 9796cm^2. How wide is the matte border?
July 12, 2009

math
A rectangular field is to be enclosed by a fence. Two fences parallel to one side of the field divide the field into three rectangular fields. If 2400m of fence are available find the dimensions giving the max area.
July 12, 2009

math
solve for x 3x^2-18x=0
July 12, 2009

grade 11 math
a uniform-width boardwalk is built around the inside edge of a rectangular parkland that is 10m by 15 m. if the boardwalk takes up 20% of the lot, how wide is the boardwalk to the nearest centimetre?
July 7, 2009

Physical Science
what grade is this
May 22, 2009

Math
Today's HW, due tomorrow, I'm lost, please help. 1. 5y - 7x = 10 2. 2y = 10 - 2 (x - 3) 3. y = 2x + 1/2 (3x + 1) + 1/4 (2x + 8)
May 4, 2009

Physics
If two pith balls - one which is neutral and another which has a charge of -9.6 uC (micro-Coulombs) - are touched together, how many extra electrons will each ball have?
April 8, 2009

CHEM HELP
Which of the following is NOT true of colligative properties? Colligative properties are... a) dependent on the molar mass of the solute. b) dependent on the mass of solute present. c) responsible for lowering the vapor pressure of a solution versus the vapor pressure of the ...
April 2, 2009

math: factoring
how would i factor this 2x^2(p + q^3) - (p + q^3)
March 20, 2009

MATH
I NEED TO FIND WHAT 33333+12=
March 9, 2009

MATH
END 1045PM ELAPES TIME 12HR 35MIN FIEN WHEN STARTED
March 9, 2009

college chemistry
I got 1)Potassium persulfate 2)persulfate ion 3)Sodium thiosufate 4)thiosulfate ion
February 25, 2009

college chemistry
How do I name the following compounds; K2S2O8, S2O8{-2}, Na2S2O3 and S2O3{-2}
February 25, 2009

Chemistry
The mol mass calculated would be higher than expected. but when we are measuring the pure cyclohexane's freezing point, this wouldn't matter right?? The freezing point would be the same no matter what the volume of solvent.
February 25, 2009

mathematics
For each of the following state the axiom, definition illutrated. All elements written are whole numbers. v-e= s since e< v and s + e = v
January 25, 2009

Social studies
what are aboriginal rights ?
January 22, 2009

Social studies
what are aboriginal rights ?
January 22, 2009

math
please explain to me how to dived this 57/550
January 12, 2009

arithmetic
619
January 10, 2009

arithmetic
4863
January 10, 2009

arithmetic
50divied483
January 10, 2009

TRivia
Who said,We may have disagreement, but let some other country step on our tail and see how quickly American unite. It is a Western movie star.
January 5, 2009

Mircoeconomics
Figure 3-1 ____ 2. Refer to Figure 3-1. Assume that Cliff and Paul were both producing wheat and corn, and each were dividing their time equally between the two. Then they decide to specialize in the product they have a comparative advantage in. As a result, total production ...
December 5, 2008

math
11
December 1, 2008

math
22 divied 2
December 1, 2008

chemistry
Well i believe it is bc H20 needs alot of energy to bc a gas bc of the molecular bonds on it, while CO2 requires less energy to become a gas so that is why it becomes a gas at room temp
November 25, 2008

french
im trying to say I, and im a boy? so its il?
November 17, 2008

french
can someone help me edit this? Pour sa nouvelle chambre, il (elle?) veut changer les meubles et la couleur des murs. Aussi, il (elle?) veut organiser sa grande collection de livres des animaux ty
November 17, 2008

PHYSICS
A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -3.80 rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -21.0 rad/s...
November 14, 2008

science
in the year 1971. astronaut alan shepard hit a golf ball whila on the surfase of the moon. it became the longest golf shot in history alan shepard was able to hit his recod golf shot because A.the moon dods not have any gravity B.THE GRAVITY OF THE MOON IS WEAKER THAN THE ...
November 8, 2008

science
some traits in animals are in herited from parents to off spring other traits are learned or result from the influense of the animal's environment identify the trait that results from the influense of the animal's environmet A.many species of insects lay thousands of ...
November 8, 2008

science
IN SCIENSE CLASS STUDENTS ARE TO FOMULATE A TESTABLE HYPOTHESIS FUOR OF THEYR HYPOTHESIS ARE GEVEN BELOW. WHISH OF THE HYPOTHESIS WOULD BE MOST EASILY TESD BY A FIFTH GRADER .A WATHER AND LAND ABSORB THE SUN,S ENERGY AT DIFFERENT RATES.B. THE MONACH BUTTERFLY'S ENVERONMENT...
November 8, 2008

science
in order to smell the fumes in a safe manner you should A,hold the item to you nose and sniff quickly B.gently wava the fumes toward you nose and sniff very lightly.C,quickly wave the fumes toward you nose and sniff deeply,D.ASK YOUR TEACHER TO SNIFF THE FUMES FOR YOU
November 8, 2008

science
solar ligth ,heat ,geothermal solar ligth electrical, solar heat geothermal,solar light heat
November 8, 2008

science
what forms of energy are provided by the sun
November 8, 2008

science
whish of the following plantstraits not inherited gras turns darker when sprinkled whid nitrgen B.arosebush has thorns C.maple tree leaves die in the fall D.a cactus stores water
November 8, 2008

algebra
How do I define a variable and write an inequality to model the following situation? The temperature in a refrigerated truck must be kept at or below 38Deg F
November 5, 2008

science
The force of attraction between two objects________decreases or increases if you increase the amount of mass or substance in the bodies. The force of attraction between two objexts___decreases or increases if you increase the distance between them?
October 13, 2008

Math
What is the GCM of 10 and 25.
September 17, 2008

Math
What is the LCM of 25 and 10
September 17, 2008

human services in the united states
week six prevention example paper
September 7, 2008

Axia College
i have been a axia university of phoenix for a year now and its a very well known college and very creditable
August 7, 2008

Sociology Multiple choice
For question number 2. The answer is D right?
June 12, 2008

Social Studies
What was the saying that the colonists cried to protest British tariffs on goods?
June 3, 2008

math
Factor the trinomial c^2+5c+6
May 2, 2008

calculating infinity
1) I get it, except for lim (-1)^(n) = ? n-> +infinity is infinity even or odd? This is important because the result determines wheter the series that i was given is convergent or divergent. 2) in another excercise I encauntered the following problem: is the following ...
April 16, 2008

calculating infinity
can someone tell me wich one of the two awnsers for these two limits is correct? lim (-1)^(n) = 1 or -1 n-> +infinity lim (-1)^(n) = 1 or -1 n-> -infinity Thanks in advance.
April 16, 2008

Biology
sorry a few more questions why can DNA form fibres that allow it to seprate from RNA while RNA cant form such fibres? also, when treated with DNAse, I know DNA viscosity reduces because its cut up into smaller pieces. but on a graph of viscosity vs time, I have this ...
April 9, 2008

Biology
What does base do to DNA when it is added to it?
April 9, 2008

Physics
how do i find gravitational potential energy without being given the height?
March 26, 2008

Physics
A boy weighing 40kg runs at 8.0m/s grabs a rope and swings of level ground. What maximum height does the child reach? How do I solve this?? it is under the conservation of energy section of work, power and energy. any help would be great! thanks
March 26, 2008

algebra
x+1/x=-7/x-12
March 2, 2008

Math
find the area and permiter of trapazoides?
February 19, 2008

algebra
polynomial subtraction a-a2-a-6/2(a-3) a-a(squared)-a-6 divided by 2(a-3)
February 7, 2008

spanish
Can someone please check this for me? How long has it been since the following people have done the following things? Write the answers using the expression hacer + time. 1) Santi y Silvina: no estar casados / un año Your response: Hace un año que Santi y Silvina...
February 5, 2008

Physics
I NEED HELP.... I look in my text for an inverse square law and i get G=M1M2/d^2, But im not given a two masses. The repusive force between two ceramic magnets was measured and found to depend on distance, as given in the table. Separation, d (mm) Force,F (N) 10 3.93 12 0.40 ...
October 31, 2007

pre-calc
(8y2+3y-7)(3y+4)
October 17, 2007

Organic chemistry: dehydrohalogenation
P.S. I understand the mechanisms of E1, E2, and dehydrohalogenation. I just don't know how to find out whether an alkyl halide undergoing dehydrohalogenation will follow an E1 or an E2 reaction.
October 10, 2007

Organic chemistry: dehydrohalogenation
Hello. I know you guys don't do organic chemistry but because I got so much help from you guys in general chemistry, I was wondering if you guys can help me out again. :P Here's my question. In dehydrohalogenation, how do you know whether a reaction is E1 or E2? My ...
October 10, 2007

math
What is the probability of a die not coming up six, six times in a row? How do I solve that problem?
October 1, 2007

Math
Can you show me how to solve this problem? You have a die, what is the probability you will not get a six, six times in a row?
October 1, 2007

general math
I have 20 puzzle tables (1,2,3,…,20) that contain of 10 rows (1,2,3,…,10) each. There are numbers 1,2,3,4,… in each of every tables, which has a unique position to every rows. I am just wondering if you can help me how to find the relations between them, so the ...
September 25, 2007

Calculus
OK trying again. For what (numerical) of the constant "c" is the function f(x)= {x^2-cx if x is greater than -1 {cx^3+x if x is less than or equal to -1 continuous on (- infinity, +infinity)?(Justify answer!)
September 16, 2007

Calculus
For some reason the answer to this question is alluding me, Im sure its probbly something simple im just over looking. For what (numerical) value of the constant "c" is the function continous on (-?,?)?( Justify Answer) f(x)= x^2-cx if x>-1 cx^2+x if x?-1
September 15, 2007

computer graphics
You purchase the latest "must have" computer video game from the store. The game has fantastic graphics but it runs rather slow on your computer. What must you do to increase the performance of the game? 1. Install a GVA adapter that has more ROM. 2. Install a video ...
June 13, 2007

History
I'm writing a paper on the ties between the education system and the US government. My question is, what are some major things that the government has done for the school system in the last 25 years? Title I, Title II, Title VII, Title IX, etc. http://www.google.com/search...
June 3, 2007

science
Radiation: radiation is the transfer of energy along electromagnetic waves like light waves and radio waves Conduction: conduction is the transfer of heat between objects or substances that are in direct contact with each other Convection: convection is the transfer of heat by...
May 1, 2007

General chemistry ligand
Hello. I have a question about ligands. How do you figure out how many ligands a central metal cation can have? For example, Cu^2+ and NH3. When they combine, it forms Cu(NH3)4^2+ Why does it form 4 ligands oppose to 6? A general rule, which isn't always followed, is to ...
April 26, 2007

Calculus
Please.... I need your help! I posted this question yesterday and no one has answered it yet. Can anyone help me please? My question was: The Taylor series about x=5 for a certain function f converges to f(x) for all x in the interval of convergence. The nth derivative of f at...
March 18, 2007

calculus-- need help desperately!
The Taylor series about x=5 for a certain function f converges to f(x) for all x in the interval of convergence. The nth derivative of f at x=5 is given by f^(n) (5)= (-1)^n(n!)/((2^n)(n+2)), and f(5)=1/2. Write third degree Taylor polynomial for f about x=5. Then find the ...
March 17, 2007

earth science
Info on the largest earthquakes http://earthquake.usgs.gov/regional/world/historical.php
March 13, 2007

Watershed?
the watershed comes from your booty it flows out of your mouth to your ass
November 1, 2006

word unscramble
lrecilac ecprepiont
September 28, 2006

Lattice method/math
329 times 4????????????????
September 19, 2006

math
Solve for b2: A=1/2h(b1+b2)
August 15, 2006

Math help!
I dont understand this. Solve -5x - 6 = -6x^2 Rearrange to 6x^2-5x-6=0 (3x + 2)(2x - 3)= 0 Set each factor equal to zero and solve for x. I hope this helps.
June 25, 2006

Math help 2
And this one is troubling me. 3x^0 - 2(x - 3^0) - |-11 - 2| = 4x(2-5^0) - 7x please help. Thanks I don't know if you are aware of this, but anything to the "zero power" = 1 and the vertical lines indicate absolute value (regardless of sign). So this translates to...
June 22, 2006

Math Help
How is this problem done? it's not coming out right for me. solve for c: x = p(1/a + m/c) cax=pc+ ma c(ax-p)=ma then divide by ax-p check my thinking.
June 22, 2006

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