Popular questions and responses by Andre
  1. Chemistry

    SO2(g) + NO2(g) SO3(g) + NO (g) At a given temperature, analysis of an equilibrium mixture found [SO2] = 4.00 M, [NO2] = 0.500 M, [SO3] = 3.00 M, and [NO] = 2.00 M. (a) What is the new equilibrium concentration of NO when 1.50 moles of NO2 are added to the

    asked on May 11, 2009
  2. physics

    A force of 40N is applied at the end of a wire 4m long and produces an extension of 0.24mm. If the diameter of the wire is 2.00mm calculate the stress on the wire and strain in the wire. With full workings please

    asked on April 23, 2018
  3. Computers

    1. What does the term "fair-use exception" mean? (1 point) to use only material that has never been published the ability to use material made by others for educational purposes an exception to copyright restrictions for images only Educational material is

    asked on February 3, 2015
  4. Math

    If a storage tank is holding 450 litres when it is three-quarters full, how much will it contain when it is two-thirds full?

    asked on September 3, 2016
  5. English

    1) In the story "A Meeting in the Dark," John's character advances the plot and communicates the theme through each of the following conflicts except. A)man vs. man B)man vs. nature C)man vs. society D)man vs. himself 2) Read the following sentences that

    asked on December 11, 2014
  6. wcccd

    A car dealership offers a $1400 rebate and a 5% discount off the price of a new car. Let p be the sticker price of a new car on the dealer's lot, r the price after the rebate, and d the discounted price. Then r(p) = p − 1400 and d(p) = 0.95p

    asked on November 21, 2015
  7. math

    four more than three times a number equals 27

    asked on June 7, 2017
  8. wcccd

    The period p of a pendulum, or the time it takes for the pendulum to make one complete swing, varies directly as the square root of the length L of the pendulum. If the period of a pendulum is 1.3 s when the length is 2 ft, find the period when the length

    asked on October 18, 2015
  9. calculus

    Find all first and second partial derivatives of z with respect to x and y if x^2+4y^2+16z^2−64=0.

    asked on August 24, 2016
  10. Chemistry

    The equilibrium constant Kp for the reaction below at 700°C is 0.76 atm. CCl4(g) --> C(s) + 2 Cl2(g) Determine the initial pressure of carbon tetrachloride that will produce a total equilibrium pressure of 1.20 atm at 700°C

    asked on February 20, 2012
  11. Chemistry

    Hi I just wanted to verify a few answers to chem questions I'm working on. Was wondering if anyone could help? 1. Calculate the molar concentration of 2.34g of lithium hydroxide, LiOH disolved in water to make 750ml of solution. My answer was CLiOH = 0.133

    asked on October 17, 2010
  12. Math

    the cote family car gets between 25 and 29 miles per gallon of gasoline the fuel tank holds 17 gallons of gasoline and the cotes refill the tank whenever it is 1/4 full the cost of gasoline will be 3.47 and 3.69 per gallon A) write expressions to estimate

    asked on October 28, 2017
  13. Calculus

    Calculate the interval of convergence. Sigma from n=1 to infinity of (n!*x^n)/n^n. Calculus - Steve, Friday, July 29, 2016 at 11:52pm try using the ratio test. You should be able to show that the series converges for |x| < e I tried and I got |x|lim

    asked on July 30, 2016
  14. English

    In "Telephone Conversation," which of the following best describes the shift in the speaker's attitude towards the landlady? A)from fuming to mischievous B)from angered to conciliatory C)from embarrassed to arrogant D)from cooperative to ninchalant

    asked on December 9, 2014
  15. physics

    A circular swimming pool has a flat bottom and a 4.39 m diameter. It is filled with water to a depth of 1.51 m. There is 1.36 atm of pressure on the top surface.

    asked on November 6, 2014
  16. physics

    If the average gauge pressure in the vein is 14400 Pa, what must be the minimum height of the bag in order to infuse glucose into the vein? Assume that the specific gravity of the solution is 1.05. The acceleration of gravity is 9.8 m/s

    asked on November 6, 2014
  17. programming

    DEBUGGING // The two senior class homerooms at Littleville High School // are having a fundraising drive for the prom. Each time a student // solicits a contribution, a record is created with the // student's name and the value. Two files have been created

    asked on September 1, 2013
  18. math

    A runner starts a race at the starting line. A second runner starts at 44 yards. If the first runner moves 7 yards each second and the second runner moves 3 yards each second, at what distance will the first runner catch the second runner?

    asked on January 14, 2013
  19. calculus

    a graph shows the divends declared per share of stock for the colgate-palmolive company for the years 1988 through 1998. Find the slope of the line segment connecting the years 1988 and 1998

    asked on August 22, 2012
  20. Chemistry

    A solution is prepared by adding 50.3 mL of concentrated hydrochloric acid and 16.6 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint:

    asked on February 28, 2012
  21. Finite with Calculus Applications

    The Ball Company manufactures three types of lamps, labeled A,B,and C. Each lamp is processed in two departments, I and II. Total available work-hours per day for departments I and II are 400 and 600, respectively. No additional labor is available. Time

    asked on February 27, 2012
  22. eng 125

    How is the more direct performative aspect of drama and/or poetry reflected in these forms?

    asked on November 10, 2011
  23. Chemistry

    Thank you for your help. I did want to clarify why you are only calculating the Molar Mass for H2 and not the molar mass for H2O (or even H2O2). I'm not sure why you did this. Please clarify. See below: The following reaction represents the decomposition

    asked on October 19, 2010
  24. history

    In the early nineteenth century, Americans sought to resolve their political disputes through compromise, yet by 1860 this no longer seemed possible. Analyze the reasons for this change. we have to write a DBQ for our final in AP US history: I know im

    asked on June 21, 2009
  25. Math

    I'm having some trouble with this question: Find a value(s) that makes the expression y^2 - 16/ y^2 - 16 undefined. I know that for an expression to be undefined that the denominator must be 0, so I thought -8^2, but that would just result in 16 + 16. I'm

    asked on April 15, 2019
  26. MATH


    asked on March 15, 2019
  27. biomechanics

    If a person is in the air during a jump can they modify the path in the air of: a) Their whole body centre of gravity b) Their foot c) Theirpelvis

    asked on January 24, 2018
  28. Math

    Your older sister drove 500 miles to college one way in ten hrs what was her average velocity

    asked on December 6, 2017
  29. physics


    asked on September 25, 2017
  30. Physics

    a bicycle chain is wrapped around a rear sprocket (r=.039m) and a frond sprocket (r=0.10m) the chain moves with a speed of 1.4 m/s around the sprockets while the bike moves at a constant velocit find the madnitude of the acceleration of a chain link that

    asked on September 25, 2017
  31. Maths

    Mrs Ricky borrowed $5,340 at a bank at 9.5% per annum simple interest for 5 years. (A) the sum of money paid in interest to the bank. (B) the total amount of money repaid to the bank. (C) the value of each monthly installment.

    asked on January 13, 2017
  32. Math

    Ryan burned 315 calories in 30 minutes . If ryan works out for 1.5 hours , how many calories can he expect to burn?

    asked on December 13, 2016
  33. Math

    The table shows the number of volunteers that work at a radio-thon for different numbers of hours . How many volunteers can be expected to go to work for 9 hours?

    asked on December 13, 2016
  34. math

    the sum of the ages of three redwood trees is exactly one thousand years. when the youngest tree reaches the age of the middle tree, the middle tree will have reached the age of the oldest tree. at that time the middle tree will be four times the current

    asked on September 12, 2016
  35. Math

    asked on August 26, 2016
  36. calculus

    Find lim as (x,y) goes to (0,0) of (e^(-x^2-y^2)-1)/(x^2+y^2).

    asked on August 20, 2016
  37. calculus

    A particle moves so that its position is given by ⟨cos(t),sin(t),cos(6t)⟩. Find the maximum and minimum speeds of the particle.

    asked on August 19, 2016
  38. calculus

    Find an equation of the plane containing the line of intersection of x+y+z=1 and x−y+2z=2, and perpendicular to the x-y plane.

    asked on August 16, 2016
  39. calculus

    Do the three points (1,2,0), (−2,1,1), and (0,3,−1) form a right triangle? I think they do by using dot product. Do the three points (1,1,1)(1,1,1), (2,3,2)(2,3,2), and (5,0,−1)(5,0,−1) form a right triangle? I think they don't.

    asked on August 14, 2016
  40. calculus

    A force of 10 pounds is applied to a wagon, directed at an angle of 30∘30∘. Find the component of this force pulling the wagon straight up, and the component pulling it horizontally along the ground.

    asked on August 14, 2016
  41. calculus

    Find the Maclaurin series of xcos(x^2).

    asked on August 7, 2016
  42. Calculus

    Calculate the interval of convergence. Sigma from n=1 to infinity of (n!*x^n)/n^n.

    asked on July 29, 2016
  43. Math

    Solve the equation using exact values. Check for any extraneous roots. 9^2x+4(9^x)=21.

    asked on July 23, 2016
  44. math-steve

    When Mr. Lucky starts betting, he has 3 dollars. On any bet, he wins with probability 1/3 and loses with probability 2/3. If he wins a bet, the total amount of money he has triples. If he loses a bet, he loses 2/3 of the total amount of money he has. Mr.

    asked on July 8, 2016
  45. math-steve

    When Mr. Lucky starts betting, he has 3 dollars. On any bet, he wins with probability 1/3 and loses with probability 2/3. If he wins a bet, the total amount of money he has triples. If he loses a bet, he loses 2/3 of the total amount of money he has. Mr.

    asked on July 5, 2016
  46. math

    When Mr. Lucky starts betting, he has 3 dollars. On any bet, he 7. wins with probability 1/3 and loses with probability 2/3. If he wins a bet, the total amount of money he has triples. If he loses a bet, he loses 2/3 of the total amount of money he has.

    asked on July 5, 2016
  47. Math

    A circle of radius greater than 9 cm is inscribed in the square ABCD. A point P on the circle is 8 cm from side AB of the square, and 9 cm from side AD. What is the radius of the circle? D-----------C | | | |

    asked on July 4, 2016
  48. Calculus

    How do you find the derivative of sqrt(x+sqrt(x+sqrt(x+.......)))?

    asked on March 29, 2016
  49. Calculus

    Use the integral identity: ∫(a-1) (1/(1+x^2))dx=∫(1-1/a) (1/(1+u^2))du for a>1 to show that: arctan(a)+arctan(1/a)=π/2

    asked on March 14, 2016
  50. math

    What is the largest integer n such that 1440/(n^2-1) is an integer?

    asked on March 5, 2016
  51. math

    What is the largest integer n that 4n+1 is a multiple of n+1?

    asked on March 5, 2016
  52. Math

    How many digits are in the decimal representation of 5^40? No calculator allowed.

    asked on March 2, 2016
  53. calculus

    There is a shape first a regular triangle inscribed in a circle, and inscribed in a square, inscribed in a circle, inscribed in a pentagon, etc. so polygon circle polygon circle, etc. the radius of the first circle is 1, find an equation for radius n.

    asked on February 22, 2016
  54. math

    Prove that sinx=x for x is a real number has only one solution at x=0

    asked on February 15, 2016
  55. Math

    If a valid time on a 12 hour time period has the hour hand and minute hand switched, how many times will that result in another valid time? I have found 11, which is when the hour hand points at the same place as the minute hand. I know there is much more,

    asked on February 6, 2016
  56. Calculus

    What is the derivative of f^3(g(x)) where both are continuous functions? I used chain rule and got 3f^2(g(x))f'(g(x))g'(x) but it is not right.

    asked on February 5, 2016
  57. Calculus

    1. Prove that (f(x+h)-f(x-h))/2=f'(x) 2. Prove that any parabola sastifies the equation (f(x+h)-f(x-h))/2=f'(x) For the first question, I tried to solve it but there is an extra h tacked on to one side. I have no clue what to do for the second question.

    asked on February 1, 2016
  58. Calculus

    Use the identity sin^2x+cos^2x=1 and the fact that sin^2x and cos^2x are mirror images in [0,pi/2], evaluate the integral from (0-pi/2) of sin^2xdx. I know how to calculate the integral using another trig identity, but I'm confused about how to solve this

    asked on January 18, 2016
  59. Calculus

    Integrate 1/sinx dx using the identity sinx=2(sin(x/2)cos(x/2)). I rewrote the integral to 1/2 ∫ 1/(sin(x/2)cos(x/2))dx, but I don't know how to continue. Thanks for the help.

    asked on January 11, 2016
  60. Calculus

    Find the volume generated by rotating about the x axis the area bounded by x=0, y=2sinxcosx,, y=2cosx, and x=4, if 0≤x≤pi/2. I don't get the graph.

    asked on January 4, 2016
  61. Calculus

    A thin plate lies in the region between the circle x^2+y^2=4 and the circle x^2+y^2=1 above the x axis. Find the centroid. For the second part, same question except the region in the first quadrant instead of above x axis. For part a, I figured out bar x

    asked on January 3, 2016
  62. Calculus

    A 20 meter long steel cable has density 2 kg per meter. It is hanging straight down. There is a 100 kg bucket of concrete attached to the bottom. How much work is required to lift the bucket 10 meters by lifting the cable ten meters? Gravitational force

    asked on December 31, 2015
  63. Salk

    What is 58,420 in simplest form (math question 6grade)

    asked on December 14, 2015
  64. trigonometry

    from a point A on the side of straight road, the angle of elevation of the top of the electric pole is 15°20'. from a point B on the same side of the road, the angle of elevation of the top of the pole is 10°52'. If the distance of A and B is 50 meters,

    asked on December 7, 2015
  65. DC-AC Electronics

    What is a Series Capacitor

    asked on August 4, 2015
  66. Maths

    A cylindrical tank has the dimensions a 100cm and 140cm ,if the tank is filled with 275 liters of water what is the depth of water in the tank

    asked on June 16, 2015
  67. Science

    what is the combination of waves?

    asked on May 24, 2015
  68. Languages Arts

    Which of the following describes the word dew? A. What happens when you don't get enough sleep for a few days. B. What happens to your teeth when you eat too much candy. C. What happens to plants in a garden overnight. D. What happens when you leave a

    asked on February 6, 2015
  69. Science

    3.What are the advantages of your design over using fossil fuels (I JUST WANNA KNOW WHAT DOES THE QUESTION MEAN LIKE BREAK IT DOWN FOR ME YOU DON'T HAVE TO DO IT THANK YOU)

    asked on January 9, 2015
  70. English

    Which of the following lines from the poem best shows the speaker's distaste for the situation? A)Silence. Silence transmission of Pressurized good breeding? B)OR VERY DARK?" Button B. Button A. Stench. C)Pushed dumbfounded to beg simplification. D)Her

    asked on December 9, 2014
  71. Maths

    The first term of an AP is 12 and that of a GP is 6. The common difference and the common ratio are equal, so as are the sum of the fist 3 terms. Find the possible values of the common difference?

    asked on December 1, 2014
  72. physics

    A constriction in a pipe reduces its diameter from 7.9 cm to 1.8 cm . Where the pipe is wider, the fluid velocity is 8 m/s. Find the fluid velocity where the pipe is narrow. Answer in units of m/s

    asked on November 6, 2014
  73. physics

    What force F must be applied to the small piston to maintain the load of 49 kN at a constant elevation?

    asked on November 6, 2014
  74. physics

    A 73 kg man in a 4.3 kg chair tilts back so that all his weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area of radius 1.5 cm. Find the pressure exerted on the floor by each leg. The

    asked on November 6, 2014
  75. Calculus

    It is known that the quantity demanded of a certain make of portable hair dryer is x hundred units/week and the corresponding wholesale price is shown below where p is in dollars. p = sqrt(225 - 5x) The supplier will make x hundred units of hair dryers

    asked on September 25, 2014
  76. Reading

    8. in which sentence is the word gesture used correctly ( 1 point) A.Smiling, she extended her hand in a gesture of friendship. B.Tired from a long day of work, I put my gesture down on the table wearily.**** C.He called for a gesture next Tuesday, and all

    asked on September 17, 2014
  77. science

    Is it ture that air molecules have weaker attractions then water molecules? A.Yes B.No

    asked on May 6, 2014
  78. Math

    If a boat rental company charges 100.00 a day plus .50 per kilometer and another company charges 90.00 a day plus .60 per kilometer, at how many miles would the bill at both companies be the same?

    asked on January 30, 2014
  79. Math

    A candle has length 25 cm. Once lit, the candle burns away at a constant rate of 0.6 cm per minute. What is the length of the candle (in cm) 20 minutes after it is lit?

    asked on September 22, 2013
  80. programming

    asked on September 15, 2013
  81. programming

    trying to debug pseudocode 2. Th e Springwater Township School District has two high schools—Jeff erson and Audubon. Each school maintains a student fi le with fi elds containing student ID, last name, fi rst name, and address. Each fi le is in student

    asked on September 4, 2013
  82. programming

    Find Bugs in the pseudocode start Declarations num category num SIZE = 5 num QUIT = 9 num sales[SIZE] = 0, 0, 0, 0, 0 string HEAD1 = "Sales" string HEAD2 = "Category Number of Sales" output "Enter category ", QUIT, " to quit " input category while category

    asked on August 30, 2013
  83. Math

    Kathy drove from Dry Creek to Cactus, a distance of 250km. She increased her speed by 10km/h for the 360km trip from Cactus to spur. If the total trip took 1 hours, what was her speed from Dry creek to Cactus.

    asked on April 7, 2013
  84. language

    introduction for an essay . show me please

    asked on October 2, 2012
  85. english

    what is a simple predicate in a well-fed lion will be peaceful thank you

    asked on August 31, 2012
  86. Math Models

    The distance needed to stop a car (d) varies directly with the aquare of the speed of the car (s). If a car traveling 25 mph requires 0 feet to stop, how many feet will be required to stop a car that is traveling at 60 mph?

    asked on June 13, 2012
  87. Chemistry

    What massof iron is contained in 86.6 grams if FeSO4?

    asked on June 12, 2012
  88. Statistics

    The Arcade shack is a manufacturing plant located in San Diego where 800 factory workers are employed. The personnel department selected 36 factory employees at random for the statistical study. construct a 95% interval for the percentage of males in the

    asked on May 23, 2012
  89. business

    Lansing Auto Pats, Inc., has projected sales of $25,000 in October , $35,000 in November, and $30,000 in December of the company’s sales 20 percent are paid for by cash and 80 percent are sold on credit. The credit sales are collected one month after the

    asked on March 20, 2012
  90. Chemistry

    Consider the reaction below. 3 O2(g) --> 2 O3(g) At 175°C and a pressure of 128 torr, an equilibrium mixture of O2 and O3 has a density of 0.168 g/L. Calculate the Kp for the above reaction of 175°C

    asked on February 20, 2012
  91. math


    asked on February 2, 2011
  92. 10th grade

    log (x-9) - 109x=log 19

    asked on December 3, 2010
  93. Math

    The side length,s, of a cube is related to its volume, v, by the formula s=v^1/3. A cube box when filled with materials has a volume of 729 cm2. What is the side lenth of the cube box used? Please help me step by step with this. I don't know where to start

    asked on November 18, 2010
  94. Chemistry

    The following reaction represents the decomposition of hydrogen peroxide 2H2O2 -> o2 (g) + 2H2O (l) How many molecules of water are produced from the decomposition of 3.4g of Hydrogen peroxide, H2O2? Please walk me through this one, I need more then just

    asked on October 19, 2010
  95. physics

    An airplane pilot wishes to fly due west. A wind of 82.0 km/h is blowing toward the south. If the airspeed of the plane (its speed in still air) is 380.0 km/h, in which direction should the pilot head? This is what I did. I let theta = arcsin(82.0/380.0)

    asked on September 20, 2009

    P7-2B The board of trustees of a local church is concerned about the internal accounting controls pertaining to the offering collections made at weekly services. They ask you to serve on a three-person audit team with the internal auditor of the university

    asked on March 16, 2009
  97. physics

    Suppose that it takes 10.0 h to drain a container of 5100 m3 of water. What is the "mass flow rate," in kilograms per second, of water from the container?

    asked on August 26, 2011
  98. History (or for people familar with the film Mulan

    Does anyone know when there are examples of Legalism and Daoism (also known as Taoism) in th emovie Mulan?

    asked on November 4, 2008
  99. Math

    Which group of decimals is ordered from least to greatest? A. 5.6,5.9,5.09,5.96,5.136 B. 0.112,1.012,1.3,1.0099,10.12 C. 2.8,2.109,2.72,2.1,2.719 D. 0.132,0.23,0.383,0.3905,0.392

    asked on April 8, 2008
  100. Math

    Which group of decimals is ordered from least to greatest? A. 5.6,5.9,5.09,5.96,5.136 B. 0.112,1.012,1.3,1.0099,10.12 C. 2.8,2.109,2.72,2.1,2.719 D. 0.132,0.23,0.383,0.3905,0.392

    asked on April 8, 2008


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