Sunday
February 7, 2016

# Posts by george

Total # Posts: 985

chem 12
1.00 mol of N2O4 and 1.00 mol of NO2 are placed in an 800 mL container. Calculate the initial concentrations of each gas. N2O4= 1.25 mol/L NO2=1.25 mol/L When equilibrium is reached, the concentration of NO2 increases by 0.50mol/L. Calculate the equilibrium NO2 and N2O4 If I ...
February 6, 2016

chem 12
This is my question Into a 500mL container a chemist introduces 2.0 x 10^-2 mol of N2(g) and 2.0 x10^-2 mol of O2(g). The container is heated to 900degrees celcius and the following equilibrium is achieved. N2(g) + 2O2----N2O4(g) calculate the intial concentrations in mol/L ...
February 3, 2016

physics
8. The coefficient of static friction between a 150-kg box of medical equipment and the floor is 0.35. Would 450-N force applied horizontally be enough to cause the box to move from rest?
January 18, 2016

pyshics
8. The coefficient of static friction between a 150-kg box of medical equipment and the floor is 0.35. Would 450-N force applied horizontally be enough to cause the box to move from rest?
January 18, 2016

algebra
find the slope-intercept form for the line satisfying the following conditions: x-intercept 3, y-intercept 2/3
December 15, 2015

Physics
A roller coaster cart of mass m = 293 kg starts stationary at point A, where h1 = 23.3 m and a while later is at B, where h2 = 8.4 m. The acceleration of gravity is 9.8 m/s^2. What is the speed of the cart at B, ignoring the effect of friction?
December 14, 2015

Physics Help
A projectile is fired at an upward angle of 60 degrees with a speed of 100m/s. It lands on a plateau 150m higher. What is the projectile's speed the moment before it strikes the plateau? I'm thinking to just use the kinematic equation Vf^2= Vi^2 + 2aΔy. Am I correct?
December 13, 2015

Maths
solve this partial differentiation and find if maximum,minimum or saddle. f(x,y)=x^3-y^3+6xy...
December 2, 2015

sunyani polytecnic
Maths make x the subject from this equation: 3x^2=6y
December 2, 2015

Statistic
professor has found that the grades on a Statistics Exam are normally distributed with mean 72 and a standard deviation of 12. If only the best 15 % of the grades in the class will get an A, what grade must a student get in order to get an A?
November 28, 2015

physics
A car travelling 110 km/h [S25°W] turns to a heading of [S25°E]. What is the car's change in velocity ?
November 24, 2015

U.S.history
All of the following are true about religious displays on public property excep
November 23, 2015

English
What does this mean "the cold gleam of the fanatic" It is in the story "The Sniper" by Liam O'Flaherty
November 18, 2015

precalcus
\$30,549.39
November 9, 2015

stat
The mean of a normal probability distribution is 60; the standard deviation is 5
November 5, 2015

Math
October 5, 2015

Math
A home owner goes to the hardware store to purchase the letters that make up a number for a sign he is making, (e.g., F-O-U-R, N-I-N-E, etc.). When he arrives, other customers are doing the same thing. The first customer buys the letters to display ONE, and pays \$40. The next ...
October 5, 2015

Math
I can't figure this out! Help please! The Problem At the local park, I saw a man was quizzing a boy with some simple arithmetic problems, and the boy seemed to be getting them all correct. He asked the boy, "32 + 5", and the boy answered, "37". The man ...
September 30, 2015

math
A wall has an area of 7.2 square meter. It was painted yellow and brown. The area of the wall painted yellow was 3 times as large as the area painted brown. What was the ratio of the area painted yellow to the area painted brown?
September 19, 2015

Chemistry
Which of the following is the strongest acid? 1. HNO2 4. H2SO3 2. H2CO3 5. HFO 3. HC1O3 6. H2O I'm really stuck, I know none of these are a "strong acid." I think the strongest might be HClO3 because Cl has the highest oxidation number and it has the most amount ...
September 9, 2015

Stat
The following data are the number of persons who were waiting in line at a fast food counter at 100 randomly selected times during the week. At the 0.05 level, test whether the population of these values could be Poisson distributed. x = Number Number of of persons ...
September 2, 2015

Math
A recipe for punch calls for 4 cups on lemonade for every 6 quarts of fruit juice. How many quarts of fruit juice should elly use if she has already added 10 cups of lemonade
August 27, 2015

Algebra
In a three digit number, the hundreds digit is twice the units digit. If the digits are reversed, the new number is 396 less than the original number. Find the number.
August 9, 2015

math
To get a year's digit product, multiply the year's digits. For example, between 1900 and 2000, the 2 years 1913 and 1931 each have a digit-product of 27. What is the largest integer n for which n of the years from 1900-2000 have the same non-zero product? A. 2 B. 3 C. ...
August 4, 2015

math
If x is greater than or equal to 100, then √x+16 (the whole thing is square rooted) is between A. √x and √x+1 B. √x+1 and √x+2 C. √x+2 and √x+3 D. √x+3 and √x+4 How do I go about solving this?
August 4, 2015

math
For how many different positive integers n will n, n+2, and n+4 represent three different prime numbers? A. none B. 1 C. 2 D. 3
August 4, 2015

math
Exactly ? different pairs of integers (x,y) represent points on the circle x^2 + y^2 = 25. A. 12 B. 8 C. 6 D. 4
August 4, 2015

math
For how many different positive integers n will n, n+2, and n+4 represent three different prime numbers? A. none B. 1 C. 2 D. 3
August 4, 2015

math
Exactly ? different pairs of integers (x,y) represent points on the circle x^2 + y^2 = 25. A. 12 B. 8 C. 6 D. 4
August 4, 2015

math
So would it be 6 and 9 again?
August 4, 2015

math
If the roots of ax^2+bx+c=0 are 6 and 9, then the roots of 3ax^2+3bx+3c=0 are A. 2 and 3 B. 6 and 9 C. 18 and 27 D. -2 and -3 I think since you multiply by 3, the roots are multiplied by 3, but I'm not sure.
August 4, 2015

PHYSICS
Write 5 multiple-choice exam questions on any topics of your choice. A good question should be of sufficient difficulty and perhaps have a good background story? Try to change questions you've seen previously? Post your favorite question to the blackboard discussion board
July 9, 2015

PHYSICS
In 2286, Admiral Kirk and his crew were forced to use the sling shot effect in a stolen Klingon Bird-of-Prey to travel back in time to the late 20th century to retrieve two humpback whales. The stolen Klingon Bird-of-Prey traveled towards the sun at a velocity of v, while the...
July 9, 2015

Economics
welfare payments are simply forms of financial aid or support given to an economic sector (or institution, or individual) generally with the aim of promoting economic and social policy. they are payments provided by the government mostly in developed countries e.g US to the ...
July 9, 2015

PHYSICS
Consider holding a carton of milk in your hand, as shown in the image. The force of the bicep muscle acts at an angle of 15 o to the vertical, while the weight of the arm and the milk both act downwards. The distance from the elbow to where the bicep muscle is attached via the...
July 9, 2015

PHYSICS
Consider a series of integers a1< a2<... < a43 < a44 that are all positive and all of the numbers are taken to be less than 125. There are 43 differences between adjacent numbers in this series defined as,di= ai+1 - ai . Can you prove that some value of the ...
July 9, 2015

PHY 1
You hold a hose at 45 degrees to the horizontal and at a height of 1 m from the floor. The water reaches a maximum distance of 10 m from where you are standing. Now you place your thumb over the end of the hose to occlude the opening by 80%, which in turn reduces the flow rate...
July 9, 2015

PHY 1
In 2286, Admiral Kirk and his crew were forced to use the sling shot effect in a stolen Klingon Bird-of-Prey to travel back in time to the late 20th century to retrieve two humpback whales. The stolen Klingon Bird-of-Prey traveled towards the sun at a velocity of v, while the...
July 9, 2015

PHYSICS
Consider a series of integers that are all positive and all of the numbers are taken to be less than 125. There are 43 differences between adjacent numbers in this series defined as, . Can you prove that some value of the differences (which must also be positive integers) must...
July 9, 2015

Calculus
I have a graph of f(x) which I cant post here, but would like some help with concepts. lim f(x) = L x->a I already found the limit for different values of a. Now I need to find the value of f(a) at each point. So is f(a) = lim f(x) x->a So f(a) is just the same value of ...
July 7, 2015

Calculus
The velocity of a ball that has been tossed vertically in the air is given by v(t) = 16 − 32t, where v is measured in feet per second, and t is measured in seconds. The ball is in the air from t = 0 until t = 2. Determine the value of v'(1). What are the units on the...
July 6, 2015

Chemistry
Sorry, figured it out. 1.00E-5 x [476/(1240)]= 3.84E-6
July 5, 2015

Chemistry
A student mixes 764 mL of water and 476 mL of 1.00 x 10-5 M orange food dye solution. What is the concentration of this new dilute solution of orange food dye?
July 5, 2015

Algebra 2
Consider the leading term of the polynomial function. What is the end behavior of the graph? Describe the end behavior and provide the leading term. -3x5 + 9x4 + 5x3 + 3
July 3, 2015

pre-calculus 11
I have a question that two ski decide to have a race. I need show a graph of height versus time of the two skiers going over a jump. I am assuming that both skiers graphs would be parabola's and have a maximum height with both graphs opening downward.
June 16, 2015

pre-calculus 11
The infinite series 1+3x +9x^2 +27x^3+.. has a sum of 4.The value of x is? so if 1/1-r I substitute 1/1-3x =4 so x=1/4 if someone could confirm that my answer is correct? thanks so much
June 16, 2015

pre-calculus 11
The question is the roundtrip flight from Edmonton to Toronto covers a distance of 5400km in 7.6 hours. The speed from Edmonton to Toronto was 95 km/h faster than the speed from Toronto to Edmonton. What was the speed of the plane from Toronto to Edmonton? If i set up my ...
June 16, 2015

pre-calculus 11
-x/(x-3) + 2x/(x+2) (x-1) x (x-2) (x+2)/(x-3)(x-3) my question is should i multiply first and then do the adding or subtracting thru a LCD or should i do the adding first?
June 16, 2015

pre-calculus 11
a launch window of 8:00 to 12:00. If t represents the launch time then what is an acceptable range of values for launch times? My thoughts are on this is that the scientist have a window of 4 hours which can include 8:00 and 12:00 but cannot exceed them. So time could be ...
June 16, 2015

pre-calculus 11
an object has a mass of m= 3x/4x^2 and density of d=x-1/2^2 where ve m/d and state any restrictions on the variable. So this simplifies to v=3x/2x-2 my question is the restriction i have found is x cannot be 1 which would make the denominator zero. Do I have to be concerned ...
June 15, 2015

pre-calculus 11
I have the question y=-|x^2 -9| I am asked for the piecewise function. I have written y={-x^2 +9 if x less than equal to -3} { x^2 -9 if x is greater than equal to 3} I am wondering if I have my are signs backwards.My reasons for choosing the signs I have is if I plug a ...
June 14, 2015

pre-calculus 11
I am asked to solve the absolute value equation of |1/2x +1| =x+1 graphically. I can solve this algebraically and consider two cases for the absolute value one being positive and the other negative. I know this will be a straight line and when I solved it algebraically x=0 the...
June 14, 2015

pre-calculus 11
I have f(x) + 1/ x-c this is the question and I am told for the function with a vertical asymptote at x=1 Mr. Reimy was kind enough to provide this information comparing it to y = 1/x for the first interpretation the graph of y = 1/x would simply be translated vertically by c ...
June 10, 2015

pre-calculus 11
I have the question what is the equation of the function in the form f(x) = 1/x-c for the function with a vertical asymptote at x=1? sketch the graph. I am uncertain how I plug this into a graphing calculator. Could I substitute 1 for x and then put an x in for c to input this...
June 10, 2015

pre-calculus 11
I am asked to solve the absolute value equation of |1/2x +1| =x+1 graphically. I can solve this algebraically and consider two cases for the absolute value one being positive and the other negative. I know this will be a straight line and when I solved it algebraically x=0 the...
June 10, 2015

pre-calculus 11
I have the question y=-|x^2 -9| I am asked for the piecewise function. I have written y={-x^2 +9 if x less than equal to -3} { x^2 -9 if x is greater than equal to 3} I am wondering if I have my are signs backwards.My reasons for choosing the signs I have is if I plug a ...
June 10, 2015

math
is the statement |f(x)|= f|(|x)| always true, sometimes true or never true use examples. If f(x) means the function of x then it means the absolute value of the function of x equals the function of the absolute value of x. I do not know how to provide examples but I believe ...
June 9, 2015

pre-calculus 11
abs x^2/2 -1 =x+3 solve algebraically so if I divide thru by 2 i get x^2 -2= 2x+3 simplifying x^2-2x-5 =0 solve by quadratic formula to get =3.449 and -0.445 both of which are extraneous roots if I take negative then I get -x^2 +2=2x+6 simplify to x^2 +2x +4 if taking using ...
June 9, 2015

parabolic path that can be reprsented by the function y=-0.1x^2 +2.9x, where x represents the horizontal distance and y represents the vertical distance of the football. As the ball is rising, a Louisanna lineman jumps in a linear path that can be represented by the equation y...
June 1, 2015

physics
two forces act on an object, force A id 8.7N and force B is 12.9N. The angle between the two forces is 125 degrees. what is the net force on the object?
May 28, 2015

math
An oil painting is worth \$400. Its value increases by 7% each year compounded annually. What is the value of the painting after 6 years (using the formula A=P(1 + i)^n
May 18, 2015

i dont understand what @Steve means
May 18, 2015

An oil painting is worth \$400. Its value increases by 7% each year(compounded annually) What is the value of the painting after 6 years? How would the graph change of the initial value of the oil painting was more than \$400? Less than \$400?
May 18, 2015

An oil painting is worth \$400. Its value increases by 7% each year(compounded annually) What is the value of the painting after 6 years? How would the graph change of the initial value of the oil painting was more than \$400? Less than \$400?
May 18, 2015

Algebra
Need help solving the system of inequalities and equations graphically for this problem. Please help! 6y=9(x-6) 3(2y+5x)=-6
April 3, 2015

Programming 1
1.Do the planning and write an algorithm to solve the following problem. Prepare test data for the example to test all possibilities and draw a trace table. Sam works at a coffee company where all the employees receive a bonus of R700, except the employees in the coffee ...
April 1, 2015

Zn(OH)2 was saturated in a solution of sodium hydroxide. The following equilibra exist under these conditions Zn(OH)2 -> Zn2+ +2OH- Ksp Zn2+ +OH- -> Zn(OH)+ K1 Zn(OH)- + OH- -> Zn(OH)2 K2 Zn(OH)2 + OH- -> Zn(OH)3- K3 Zn(OH)3- +OH- -> Zn(OH)42- K4 a) Sum of which...
March 26, 2015

chemistry
Zn(OH)2 was saturated in a solution of sodium hydroxide. The following equilibra exist under these conditions Zn(OH)2 -> Zn2+ +2OH- Ksp Zn2+ +OH- -> Zn(OH)+ K1 Zn(OH)- + OH- -> Zn(OH)2 K2 Zn(OH)2 + OH- -> Zn(OH)3- K3 Zn(OH)3- +OH- -> Zn(OH)42- K4 a) Sum of which...
March 26, 2015

Geometry
The area of a rectangular space is 128 square feet. What are the possible pairs of whole number dimensions in feet?
March 25, 2015

Math
a. Which values from the set {1, 2, 3,4} are solutions of (line _ this > )2x +5) Show your work? b. which values from the set {1,2,3,4} are solutions of 11 > 2x + 5? Show your work. How are your answer from parts a and b different? How can I tell the answers are ...
March 12, 2015

Physics
What is the centripetal acceleration in meters per second squared of a point on the rim of a circle with a radius of 0.45 meters and turning at a rate of 1200 rpm?
March 12, 2015

Chemistry
What is the pH of a solution prepared by mixing 500mL of 2.0M HCN (Ka= 4.9x10^-10) with 500mL of 1.0 M KOH?
March 10, 2015

physics
how much force is required to stop a 100 mi/hr fastball? Assume the catcher's mitt stops the ball in 1 millisecond and the mass of a baseball is 145 g.
March 7, 2015

history
what does respective strengths mean
March 5, 2015

history
I looked and I couldn't find any I need 3 points for each side
March 5, 2015

history
what are the respective strengths of WTLC(workers) and the opponents (management) in the Winnipeg general strike? please provide full answers
March 5, 2015

Computer Science
"write a program that asks the user to enter the price of an item and rate of discount. If discount is 9%, display the final cost of item" What message do I display if its not 9%? Algorithms btw
February 15, 2015

Physics
Two point charges of +1.0 uC and -2.0 uC are located 0.50 m apart. What is the minimum amount of work needed to move the charges apart to double the distance between them? (k=8.99x10^9Nm^2/C^2)
February 12, 2015

Math
100/64= 1.5625 subtract by 1 move decimal
February 12, 2015

Algebra
Tom has a \$20 bill, a \$10 bill, a \$5 bill, and \$1 bill. List the total costs possible for items he could buy if he receives no change.
February 1, 2015

061555RR
knutson company reacquired 5,000 shares of its \$15-par common stock for \$13/share. the debit to treasury stock is
January 22, 2015

Math
The temperature one spring day was 78 degrees. Starting at 1:15 pm the temperature drops 0.25 degrees per minute. What temperature will it be at 1:25 pm? Do I divide 0.25/1:25 to get the answer?
January 22, 2015

Math
Raymond puts the money he inherited in an investment that earns 4.4% per year, compound semi-annually. After 12 years his investment had grown to \$35,402.06. Raymond then invested the \$35,403.06 at 5% per year, compound quarterly for the next 5 years.
January 21, 2015

calculus
A 15-ft ladder rests against a vertical wall. If the top of the ladder slides down the wall at a rate of 0.33 ft/sec, how fast, in ft/sec, is the bottom of the ladder sliding away from the wall, at the instant when the bottom of the ladder is 9 ft from the wall? Answer with 2...
January 17, 2015

calculus
i dont see it
January 17, 2015

calculus
A rectangular box has a square base with an edge length of x cm and a height of h cm. The volume of the box is given by V = x2h cm3. Find the rate at which the volume of the box is changing when the edge length of the base is 12 cm, the edge length of the base is decreasing at...
January 17, 2015

calculus
If f(x) = ι(x2 - 8)ι, how many numbers in the interval 0 ≤ x ≤ 2.5 satisfy the conclusion of the mean value theorem? (4 points) Three Two One None
January 16, 2015

calculus
The surface area, S, of a sphere of radius r feet is S = S(r) = 4πr2. Find the instantaneous rate of change of the surface area with respect to the radius r at r = 2. (4 points)
January 16, 2015

Life and world
I need a idea of an art work response to the contemporary world it can be war violence politics or anything else im not very creative please help
December 29, 2014

physics
Save Two children hang by their hands from the same tree branch. The branch is straight, and grows from the tree trunk at an angle of 27 degrees above the horizontal. One child, with a mass of 39 kg is hanging 1.50 m along the branch from the tree trunk. The other child, with...
November 17, 2014

calculus inverted cone
A container in the shape of an inverted cone has radius 6 ft and height 12 ft. It is being drained at 2〖ft〗^3/min. Find the rate of change of the height of the liquid in the cone when the height is 3 feet. The ratio of the radius to the height remains constant.
November 11, 2014

calculus
November 9, 2014

Math
Use inverse trigonometric functions to find a solution to the equation in the given interval. Then find solutions? cos x = -0.6 , 0<= theta <=2pi Give your answers in increasing order. Round your answers to two decimal places x = x =
November 8, 2014

Find exact values for all the solutions to the equation cos theta = sqrt 3/2 for -2pi <= theta <= 2pi Theta = Theta = Theta = Theta =
November 7, 2014

Algebra
Thank you so much!!
October 18, 2014

Algebra
Factor (y+2)^2-81
October 18, 2014

physics
5.8kg bag of groceries is in equilibrium on an incline of 34deg. the acceleration of gravity is 9.81m/s^2. What is the magnitude of the normal force on the bag?
October 5, 2014

chemistry
When 34.1 g of lead reacts with 6.81 L of oxygen gas, measured at 1.00 atm and 25.0°C, 36.1 kJ of heat is released at constant pressure. What is DH° for this reaction?
October 5, 2014

chemistry
The following equation represents the partial combustion of methane, CH4. 2CH4(g) + 3O2(g) > 2CO(g) + 4H2O(g) At constant temperature and pressure, what is the maximum volume of carbon monoxide that can be obtained from 3.39 x 102 L of methane and 1.70 x 102 L of oxygen?
October 4, 2014

Statistics
Each day a local radio station randomly draws a date (without replacement) from a bowl containing all the days in the year. The first person who calls in with their birthday on the date drawn gets a prize. what is the probability that none of the birthdays selected in the ...
September 14, 2014

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