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December 19, 2014

Posts by Chris


Total # Posts: 2,259

math
alex is x years old his sister is 3 years older , togerther their age is 57. what is the equation for this.
March 22, 2012

Physics
This is all that was given
March 22, 2012

Physics
Calculate AMA given μk = 0.019 and an angle of 11 degrees.
March 22, 2012

bio
i got D
March 21, 2012

Economics
I was guessing between A or D. Thank you, David. Greatly appreciate it.
March 20, 2012

Economics
The spirit of equating marginal cost with marginal revenue is not held by a.perfectly competitive firms. b.oligopolistic firms. c.perfectly competitive firms and oligopolistic firms. d.none of the statements associated with this question are correct.
March 20, 2012

Economics
Two identical firms compete as a Cournot duopoly. The demand they face is P = 100 - 2Q. The cost function for each firm is C(Q) = 4Q. The equilibrium output of each firm is: A. 8 B. 16 C. 32 D. 36
March 20, 2012

Mangerial Economics
Consider a Cournot duopoly with the following inverse demand function: P = 50 - 0.2Q1 - 0.2Q2. The firms' marginal cost are identical and given by MCi(Qi) = 2. Based on this information firm 1 and 2's reaction functions are A) r1(Q2) = 4.8 - 0.5Q1 and r2(Q1) = 4.8 - 0....
March 20, 2012

math
Templeton Extended Care Facilities, Inc. is considering the acquisition of a chain of cemeteries for $350 million. Since the primary asset of this business is real estate, Templeton’s management has determined that they will be able to borrow the majority of the money ...
March 19, 2012

Maths
Square root of 12 using prime factor form? Square root of 320 using prime factor form? Square root of 36 using prime factor form?
March 19, 2012

english
briefly summarizing the theory and discussing at least two of the “Seven Intelligences” that apply most closely to you, providing examples to illustrate your point.
March 18, 2012

physics
A 0.23 kg ball of dough is thrown straight up into the air with an initial velocity of 12 m/s.Find the momentum of the ball of dough halfway to its maximum height on the way up.
March 15, 2012

HS Chem
Using terms of equilibrium, what is the difference between spilling a glass of milk versus ozone eminating from your copy machine?
March 13, 2012

Math 7th Grade
A car cost $65 per day to rent plus $.35 per mile. Joe rents car for 1 day and drives 115 miles. what is the equation and the solution. The solution is pretty simple $65 + .35x115 = 105.25 I can't figure out the equation.
March 12, 2012

chemistry
Using standard heat of formations. (Appendix II in text). Calculate the standard enthalpy change for the combustion of methane. CH4 (g) + 2 O2 ---¨ 2CO2(g) + 2H2O (l) ƒ¢H0 = ?
March 6, 2012

Chemistry
Calculate the [H+], [OH ‾ ], and the pH of 0.16 M solutions of: hydroxylamine (HONH2, Kb = 1.1 10-8)
March 5, 2012

Chemistry
Calculate the pH of a 5.90x10-3 M solution of H2SO4.
March 5, 2012

Chem Acids/Bases
A 25.00 mL sample of H3PO4(aq) requires 31.05 mL of 0.2410 M KOH for titration to the second equivalence point. What is the molarity of the H3PO4(aq)?
March 3, 2012

Chemistry
Write the dissociation reaction and the corresponding Ka equilibrium expression for each of the following acids in water. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer. Omit water in your answer.) (a) HC_2H_3O_2 (b) Co(H2O...
March 3, 2012

principles of physics
A carnival has a Ferris wheel where the seats are located halfway between the center and outside rim. If you were at the outside rim, your angular speed while riding on this Ferris wheel would be A) more and your tangential speed less.B) less and your tangential speed more.C...
March 2, 2012

principles of physics
If the Earth had two identical moons in one circular orbit, and the moons were as far apart in that orbit as they could be, the center of gravity of the Earth-moons system would beA) at the center of the Earth.B) outside the Earth, but beyond the orbital path of the moons.C) ...
March 2, 2012

principles of physics
Very ideally, and very strictly speaking, the falling leaves in autumn make the world spin a bit ____________________. A) All of these.B) faster.C) slower.D) off center and erratic.E) smoother.
March 2, 2012

principles of physics
When a skater brings her arms in when spinning, she increases her ____________________. A) angular speed.B) Both of these.C) Neither of these.D) angular momentum.
March 2, 2012

principles of physics
The main reason railroad trains remain on their tracks has to do with the ____________________. A) None of these.B) beveled shape of the wheel circumference.C) independence of opposite wheel motions.D) All of these. E) flange on their wheels.
March 2, 2012

principles of physics
When we studied the concept of work, we learned that work = force x distance. Now we learn that torque = force x distance. What's different about these two definitions?A) For work, distance and force are in the same direction; for torque they are perpendicular to each ...
March 2, 2012

physics
An 840 Kg roller coaster car is launched from a giant spring of constant k=31 kN/m into a frictionless loop-the-loop track of radius 6.2 m, as shown below. What is the minimum amount that the spring must be compressed if the car is to stay on the track?
February 29, 2012

Math -Tutor help only please!
Solve: 2/12x-3/12=8/12 Is x = 11/2 the correct answer?
February 25, 2012

Math
Solve: 3 - x = 12(x - 1) Is the correct answer x = 15/13?
February 25, 2012

chemestry
Calculate [OH^ - ] for strong base solution: 14.0 mL of 1.20×10−2 M Ca(OH)_2 diluted to 430.0 mL.
February 22, 2012

math
use I and a dot to show the number 52
February 22, 2012

math
I have a math question abdedbabde 1234321234 how do I do this problem
February 21, 2012

biology
Regulation of an enzyme's activity occurs a) before the enzyme is produced b) during the production of the enzyme. c) when the enzyme already exists in the cell. d) at any point on the enzymatic production pathway. Thank you
February 20, 2012

Physics
You push a 2.5 kg block against a horizontal spring, compressing the spring by 16 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 60 cm from where you released it. The spring constant is 200 N/m. What is the block-table coefficient ...
February 19, 2012

Math
the green bay packers ordered roast beef subs and turkey subs for lunch. a total of 53 subs were ordered. the number of roast beef subs ordered is 2 more than twice the number of turkey subs. write and solve a system of linear equations to determine how many roast beef subs x ...
February 16, 2012

math
2/3 x 3 top and bottom you get 6/9 + 7/9 = 13/9 = 1 and 4/9 .
February 15, 2012

algebra
i need to know how to do (4m -3power n5power)0 / mn
February 15, 2012

math
divide eight pounds of sand into twelve equal containers. how much in each container?
February 10, 2012

math
Mary's test grades were 81, 89, 86, 86, and 84. Mary's teacher recorded one of her grades incorrectly. Instead of an 89, Mary's second test score should have been a 55. Which measure(s) of central tendency are affected by this change?
February 8, 2012

English
Hi, I am trying to analyze this poem. It is called "On watching politicians perform at Martin Luther king's funeral". It is by Etheridge Knight who is a black poet who was active mostly in the 60s and 70s. Here is the poem. Hypocrites shed tears like shiny snake ...
February 4, 2012

Physics
A smooth plane AB is 10 meters long, It is inclined at 30 degrees to the horizontal with the lower end, B, 6 meteres vertically above horixontal ground. A particle is placed on the plane at the upper end, A, and then released from erst so that it slides down the plane. Find ...
February 4, 2012

Physics
A particle is at rest at the apex A of a smooth fixed hemisphere whose base is horizontal. The hemisphere has centre O and radius a. The particle is then displaced very slightly from rest and moves on the surface of the hemisphere. At the point P on the surface where angle AOP...
February 4, 2012

algebra
Which value of x makes the following equation true? 7.8(x - 2) = -0.2x + 40.4
January 31, 2012

algebra
1m=430
January 29, 2012

math-word problem
admission to a park is $5 for an adult ticket and $1 for a child. If $100 was collected and 28 admissions were sold on a day, how many tickets were sold and how many child tickets were sold
January 29, 2012

math
admission to a park is $5 for an adult ticket and $1 for a child. If $100 was collected and 28 admissions were sold on a day, how many tickets were sold and how many child tickets were sold
January 29, 2012

math unit rate question
the answer to question 1 is a tie and how many yards is 0.the answer to the second question is 10 yards behind the finishing line.
January 26, 2012

business
i am researching the prepackaged software industry and i need to find what the future holds for that industry.
January 25, 2012

pine glenn
If I have total of 63 brushes and there is six times as many orange that white how many orange do I have and how many white? how do I solve
January 24, 2012

Calculus
"Two cars are traveling along perpendicular roads, car A at 40mph, car B at 60mph. At noon, when car A reaches the intersection, car B is 90miles away, and moving toward it. At 1PM the distance between the cars is changing at what rate?" So lost! Please help!
January 24, 2012

physics
An airplane is flying horizontally at 115 m/s, at a 20.5 degree angle north of east. State its velocity in rectangular coordinates. Assume that north and east are in the positive direction.
January 23, 2012

Trigonometry
In a right triangle, CT = 6, CA = 3, and m<CAT = 90. What is the value of cot C ? CT= hypo CA= Opp.
January 18, 2012

Physics
A small ball is launched at an angle of 30.0 degrees about the horizontal. It reaches a maximum height of 2.5m with a respect to the launch position. What is the initial velocity of the ball when its launched? What is the range, defined as a horizontal distance traveled until ...
January 18, 2012

COM 1001
Wait it is any form of communication that is not face to face
January 16, 2012

COM 1001
I have no idea that is what has me super stumped I have read the two chapters over and over again
January 16, 2012

COM 1001
How do the components and processes of communication apply to the electrnic/computer channel?
January 16, 2012

math
From the Periodic Table, 1 mole of aluminum weighs 27.0 g., Therefore; If 54.0 g of aluminum are placed into the beaker to react with copper(II) chloride, how many grams of the metal product will be produced?
January 12, 2012

Science
A glass window 0.50 cm thick measures 86 cm by 31 . How much heat flows through this window per minute if the inside and outside temperatures differ by 17 ? Express your answer using two significant figures. Q/t=_________kJ/min
January 9, 2012

MATH
For which value of x will the fraction 7/2x-6 be undefined? HOW TO DO THIS ?
December 30, 2011

MATH
for which value of X will the fraction 7/2x-6 be undefined ? and check this IF three times a number decreased by 5, the result is 7. find the number. 3x-5=7 and x=4 is this right?
December 25, 2011

Finance
The answer is $1,086,250
December 16, 2011

calculus
Yes, I know, but I i had question about the answer... I'm math stupid :)
December 16, 2011

calculus
Damon help again :) (last one I promise) why is X along the road sqrt2/2? ] A rancher plans to set aside a rectangular region of one square kilometer for cattle and wishes to build a wooden fence to enclose the region. Since one side of the region will run along the road, the ...
December 16, 2011

Calculus
Damon, Help :) A rancher plans to set aside a rectangular region of one square kilometer for cattle and wishes to build a wooden fence to enclose the region. Since one side of the region will run along the road, the rancher decides to use a better quality wood for that side ...
December 16, 2011

Calculus
A rancher plans to set aside a rectangular region of one square kilometer for cattle and wishes to build a wooden fence to enclose the region. Since one side of the region will run along the road, the rancher decides to use a better quality wood for that side which costs three...
December 16, 2011

Physics
false, its called the coriolis effect
December 13, 2011

physics
Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.86 m. The stones are thrown with the same speed of 9.78 m/s. Find the location (above the base of the ...
December 13, 2011

physics
The velocity of a diver just before hitting the water is -11.1 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 1.18 s of the dive?
December 13, 2011

physics
A drag racer, starting from rest, speeds up for 384 m with an acceleration of +19.3 m/s2. A parachute then opens, slowing the car down with an acceleration of -6.33 m/s2. How fast is the racer moving 302 m after the parachute opens?
December 13, 2011

history
Thank you .
December 12, 2011

Law
Yes it is C. Read the Land Pollution Section at: "classweb.gmu.edu/rcoffinb/Chapter%2017%20Outline.htm"
December 10, 2011

algebra
9z^2+24z+16/6z^2+5z-4
December 9, 2011

physical science
One of Saturn's moons has an orbital distance of 1.87 x 108 m. The mean orbital period of this moon is approximately 23 hours. Use this information to estimate a mass for the planet Saturn.
December 8, 2011

science
What is the ratio of the large cell volume is 64mm3 and surface is 96mm2
December 5, 2011

science-biology
biology-forums(dot)com/index.php/topic,10448.new.html#new
December 4, 2011

calculus
Correction its not 2. It's 1/72 ft lbs
December 1, 2011

calculus
The answer is 2 a = 0 (start of the spring) b = 1 integrate 4x then plug in the limits (0 and 1)
December 1, 2011

calculus
The height (in feet) attained by a rocket t seconds into flight is giving by the function h(t)= -1/3t^3 + 16t^2 + 33t + 10 When is the rocket rising? When is the rocket decreasing? when does it reach its maximum height above the ground? what is the maximum height? what is the ...
November 30, 2011

calc 2
The height (in feet) attained by a rocket t seconds into flight is giving by the function h(t)= -1/3t^3 + 16t^2 + 33t + 10 When is the rocket rising? When is the rocket decreasing? when does it reach its maximum height above the ground? what is the maximum height? what is the ...
November 30, 2011

calc
a stone is thrown striaght up from the roof of an 80 foot building. the height of the stone above the ground t seconds later is giving by the function h(t)=-16t^2 + 64t +80 during what time is the stone rising? when is the stone falling? what is the maximum upward velocity? ...
November 30, 2011

chemistry
Volume of 0.185 mol . L-1 and 0.74 M
November 28, 2011

chemistry
Air dry weight of MgNH4Po4 * 6 H2O
November 27, 2011

English
Ms. Sue, thanks for your answer. Is there a rule in grammar that I can use to convince someone that #2 is correct? Which one is correct: 1. The box contains two slides labeled "A" or "B". 2. The box contains two slides labeled "A" and "B".
November 22, 2011

english
Ms. Sue, is there a rule for this that I can use to justify your answer. I have a hard time convincing a colleague that you are correct.
November 22, 2011

english
which one is correct: 1. the box contains two slides labeled "A" or "B" 2. the box contains two slides labeled "A" and "B"
November 22, 2011

physics
A 450 kg spherical mass is placed 4.40 meters away from a 550 kg spherical mass. What is the magnitude of the gravitational field midway between the two? ...... Im not quite sure how to do this any help would be appreciated.
November 20, 2011

Chemistry
An oil whose density is 0.775g/mL was used in a open-end manometer to measure the pressure of a gas in a flask, as shown in figure (b). If the height of the oil column is 7.68cm and Pbar = 760.0mmHg. What is the pressure of the gas in the flask in mmHg?
November 18, 2011

Science
what is a dilute solution
November 14, 2011

English
Soldiers carried several days cold nations. should days chage to a possessive noun from days to days'
November 10, 2011

Algebra
Solve and simplify: x^2+14x-4=0
November 9, 2011

Algebra
Add, simplify if possible 4y/y^2-9 + y/y-3
November 9, 2011

Algebra
Solve sqrt:9x+55=x+5, Simplify and use comma to separate the answers
November 9, 2011

Chemistry
I have a compound (mx) weak acid (x- = Hx) mx in 5M strong acid solution solubility = 5x10(-3) Ksp = 1x10(-20) Find Ka... I need to know where to start
November 8, 2011

Math
Classify triangle ABC by its sides if side AB = 6x, side AC = 4x + 6 and side BC = 8x + 3. The perimeter of triangle ABC is 63. Show all your work. Explain your reasoning.
November 8, 2011

geometry
A wire 10 meters ong is to be cut into two pieces. One piece wil be shaped as a square, and the other piece will be shaped as a circle. (piece one is 4x, piece two is 10-4x) a)Express the total area A enclosed by the pieces of wire as a function of the length x of the side of...
November 7, 2011

fraction 10-1 math
3/7 are red
November 7, 2011

Physics
Michelson used a rotating eight sided mirrored "wheel" to determine speed of light. In this case the mirror is rotated at a certain frequency which allows light to travel from the source, reflect off the mirrored wheel and into the observers eyes. What is the minimum...
November 7, 2011

Social studies
What stands on a hill called acropolis in for 2500 years in Greece
November 5, 2011

geometry
In ∆RST, RS = 10, RT = 15, and m∠R = 32. In ∆UVW, UV = 12, UW = 18, and m∠U = 32. Which of the following statements is correct? 1. ∆RST ∼ ∆WUV and the similarity ratio is 56. 2. ∆RST ∼ ∆UVW and the similarity ratio is...
November 3, 2011

Physics
Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.1×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 7.7 .
November 3, 2011

Physics
Jill of the Jungle swings on a vine 6.4 long. What is the tension in the vine if Jill, whose mass is 59 , is moving at 3.0 when the vine is vertical?
November 3, 2011

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