Most popular questions and responses by timmy
  1. chemistry

    In the reaction between formic acid (HCHO2) and sodium hydroxide, water and sodium formate (NaCHO2) are formed. To determine the heat of reaction, 75.0 mL of 1.07 M HCHO2 was placed in a coffee cup calorimeter at a temperature of 20.8 °C, and 45.0 mL of

    asked on April 4, 2013
  2. physics

    The body in Fig. 10-37 is pivoted at O. Three forces act on it in the directions shown: FA = 13 N at point A, 6.4 m from O; FB = 17 N at point B, 3.6 m from O; and FC = 15 N at point C, 2.2 m from O. Taking the clockwise direction to be negative, what is

    asked on March 26, 2012
  3. Chemistry

    A weather balloon is inflated to a volume of 26.2 L at a pressure of 755 mmHg and a temperature of 32.5 ∘C. The balloon rises in the atmosphere to an altitude where the pressure is 360. mmHg and the temperature is -13.5 ∘C. Assuming the balloon can

    asked on October 27, 2015
  4. science

    how many grams of copper sulfate pentahydrate (CuSO4 5H2o) would you heat to produce 29.8 grams of water?

    asked on March 18, 2009
  5. AP Chemistry

    1.A compound consists of 65.45% C, 5.492% H, and 29.06% O on a mass basis and has a molecular mass of 110 g/mol. Determine the molecular formula of the compound. 2. What is the formula weight of iron (II) sulfate? Answer in units of g/mol. 3. What is the %

    asked on September 22, 2012
  6. economics

    perfectly competitive industry. Each firm having identical cost structures. long-run average cost is minimized at an output of 20 units. Minimum average cost is $10 per unit. total market demand is Q=1500-50P. What is the long-run equilibrium price? Total

    asked on November 13, 2007
  7. Math

    A cylindrical tin can has a radius of 4.5cm and a height of 5 cm (a)What is the surface area of the can (b)What is its volume? (c)What is the cans capacity could somebody please answer this question so i can get past with math

    asked on February 29, 2012
  8. physics

    3 points particles with masses 4kg,2kg,3kg are at the corners of equilateral triangle of side m =2m.

    asked on November 28, 2012
  9. Calculus

    An inverted conical tank is 3m tall and 1m in diameter at its widest point. The water is being pumped out of a spout 2m above the top of the tank. Recall that the density of water is  = 1000kg/m^3 (a) Find the work needed to empty the tank if it is full.

    asked on May 19, 2014
  10. Math

    A ball has a radius of 56mm a)Calculate the surface area b)what is the volume of the sphere could somebody please answer for my math homework I need help

    asked on February 29, 2012
  11. physics

    A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe's diameter is 56.3 cm (0.563 m) and the flow speed of the petroleum is 13.5 m/s. At the refinery the petroleum flows at 5.65 m/s. What is the volume

    asked on December 10, 2014
  12. chem 2

    methylamine is a weak base. calculate the pH of a .025 M solution of methylamine.

    asked on November 4, 2014
  13. precalculus

    find the additive inverse of the number 6- pi and -7

    asked on September 9, 2009
  14. chemistry

    a sample consisting 22.7g of a nongasous unstable compound X is placed inside a metal cylinder with a radius of 8Cm and a piston is carefully placed on the surface of the compound so that for all practical purposes the distance between the bottom of the

    asked on April 21, 2008
  15. algebra/math

    Find the smallest value of x such that x^2+6x + 9 = 24 Please help me! I am very confused. Thank you!

    asked on April 12, 2016
  16. Physics

    An Olympic diver performs a dive from the 10 m platform and achieves a speed of 14 m/s just before entering the water. Neglecting air friction, approximately how many times larger the diver’s speed than the diver would have achieved by performing from a

    asked on March 15, 2012
  17. Physics

    On vacation, your 1350 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 2.20 m/s2. (a) What is the net force exerted by the car on the trailer? (b) What force does the trailer exert on the car? (c) What is the net force acting

    asked on October 20, 2016
  18. math

    The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material? This is the last question for my homework could u answer this

    asked on February 29, 2012
  19. chemistry

    Calculate the value of DHo for the reaction 2 CH4 (g) -> C2H6 (g) + H2 (g) given the following thermochemical equations: C2H2 (g) + H2 (g) -> C2H4 (g) delta = – 175.1 kJ C2H6 (g) -> C2H4 (g) + H2 (g) Delta = + 136.4 kJ C2H2 (g) + 3 H2 (g) -> 2 CH4 (g)

    asked on January 23, 2012
  20. geometry

    Given: M is the midpoint of line segment PQ and line segment RS. Prove: line segment QR is congruent to line segment PS.

    asked on March 11, 2011
  21. microeconomics

    This is what I have, qi=20, AC(average cost)=10, and (total market demand) Q=1500-50p. What is the industry's long-run supply schedule?

    asked on November 13, 2007
  22. science

    The two sources of new materials involved in geologic processes are: magma soil erosion products deltas

    asked on October 9, 2018
  23. chemistry

    A graduated cylinder contains 17.0 mL of water. What is the new water level after 31.6 g of silver metal with a density of 10.5 g/mL is submerged in the water

    asked on October 7, 2015
  24. Chemistry

    The initial temperature of a bomb calorimeter is 28.50°C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45°C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(g°C), how much heat is

    asked on July 8, 2013
  25. math

    The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material?

    asked on February 29, 2012
  26. Physics

    A tennis player places a 64 kg ball machine on a frictionless surface. The machine fires a 0.051 kg tennis ball horizontally with a velocity of 36 m/s toward the north. What is the final velocity of the machine? Answer in units of m/s

    asked on November 30, 2011
  27. Rounding#'s

    use a calculator to find each rounded to 4 decimal places. 1) sec 15.2 degrees 2) an acute angle theta if csctheta= 1.38

    asked on September 2, 2011
  28. physics

    What is the absolute pressure at the bottom of a storage tank of oil 18-m deep that is open to the atmosphere? Take the density of oil to be 800 kg/m3.

    asked on July 29, 2013
  29. Chemistry

    A sample of naphthalene (C10H8) that has a mass of 0.7200 g is burned in a bomb calorimeter. The mass of the calorimeter is 1.580 kg, and its specific heat is 2.55 J/(g°C). As a result of the reaction, the temperature of the calorimeter increases from

    asked on July 8, 2013
  30. chemistry

    Which of the following equations represents a reaction for which the delta H can be called a standard enthalpy of formation, delta Hf? a) FeO(s) + CO2(g) -> FeCO3(s) b) 1/2 N2(g) + 2 O(g) -> NO2(g) c) 2 Na(s) + Cl2(g) -> 2 NaCl(s) d) Ba(s) + N2(g) + 3

    asked on January 23, 2012
  31. algebra1

    how do you figure out this answer.15.6+xforx=-17.9

    asked on August 24, 2011
  32. Is anyone here a chemistry genuis?

    The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium

    asked on April 9, 2010
  33. MATH


    asked on October 10, 2018
  34. Marketing

    Good marketing managers know that A.marketing strategies can't influence consumer "wants." B.marketers can't create internal drives in consumers C.it is not that difficult to develop a marketing strategy that gets consumers to do what they don't want to

    asked on May 27, 2017
  35. Marketing

    The goal of target marketers is to develop unique marketing strategies that find unsatisfied customers to whom they can then offer superior value through more attractive marketing mixes. True or False I pick true please check my answer.

    asked on May 27, 2017
  36. Math

    Write the equation of the line in the indicated form that meets each criterion below. A. A line with a slope of -2/3 and a y-intercept of 4; in slope-intercept form B. A line with a y-intercept of – 2 and an x-intercept of 3; in standard form C. A line

    asked on February 25, 2017
  37. Physics

    A 0.15 kg baseball is moving at 35 m/s toward home plate when it is hit with the bat. The ball is in contact with the bat for 0.0019 s, and leaves the bat at 25 m/s directly away from home plate. Determine the average force exerted by the bat on the ball.

    asked on October 20, 2016
  38. geometry

    Triangle PQR has vertices P(0,12) Q(7,11) ans R(-2,2) Find the eaquation of the triangles median through point Q

    asked on January 17, 2011
  39. math

    Bronze cocnsists of 6 parts tin to 19 parts cooper. How amny pounds of tin are there in a 500 lb. bronze statue? What is the formula for getting the answer?

    asked on February 1, 2010
  40. MATH

    Jenna always throws loose change into a pencil holder on desk and takes it out every 2 weeks. this time it is all nickels and dimes. There are 7 times as many dimes as nickels and the value of the dimes is $6.50 more than the value of the nickels. How many

    asked on April 29, 2015
  41. math

    Numbers that are palindromes read the same forward and backward. For example, 30203 is a five digit palindrome. If a single number is chosen randomly from the set of all three-digit numbers, find the probability that it will be palindromic. Answer 1/10??

    asked on April 14, 2015
  42. finance math

    A car dealer purchased 2 cars, one for $1500 and the other for $20000, He then sold the first car at a loss of 14% and the second car for a profit of 15%. Find the dealer¡¯s profit for the whole transaction and express the answer as a percentage of his

    asked on August 27, 2012
  43. physics

    A student laying on a building 54.0 m high shoots a pellet gun horizontally. If the pellet lands 156 m form the base of the building, what was the muzzle velocity of the gun?

    asked on October 18, 2011
  44. Hard Calculus

    f(x)= xsquared -2x for y= absolute value of f(x) does the derivitive exist at x=0 and explain why.

    asked on September 22, 2010
  45. chemistry

    in a lab experiment to obtain the molar mass of a voltaile liquid, the following data is obtained: volume of flask=225ml mass of flask=77.834gms mass of flask+gas=78.416gms temperature=100 degrees celsius pressure=714 torr What is the molar mass of the

    asked on August 5, 2010
  46. Math

    Andre left his campsite and paddled to a fishing hole 1.5 km downstream. He timed his trip and found that it took him 9 min, His return trip upstream took him 22.5 min. Determine the speeed at which he paddled and the speed of the river? what steps did u

    asked on February 22, 2016
  47. Organic Chemistry

    How many moles of hypochlorous acid are needed to react with 0.621 mol of 9-fluorenol? please help

    asked on February 1, 2012
  48. English

    Pronoun case for who and whom 23a. Jon Bon Jovi, who is a well-known singer and actor, also owns an arena football team. 23b. Jon Bon Jovi, whom is a well-known singer and actor, also owns an arena Please what is the correct answer? I chose (A).

    asked on April 27, 2008
  49. Math

    The average debt for juniors exceeds the debt for sophomores by $ 458$458​, and the average debt for seniors exceeds the debt for sophomores by $1165. The combined debt for a​ sophomore, a​ junior, and a senior is $6543. Determine the average debt

    asked on March 18, 2017
  50. Yoruba

    There is no animal without plant,there is no plant without water,there is no cloud without the sun,the sun is essential

    asked on January 23, 2017
  51. Chemistry

    Homework question? Colmanite [Ca2B6O11 * 5 H20] is a salt whose boron content gives glass high clarity. You are a buyer for an optical fiber manufacturer and want pure material. You have just received a Certificate of Analysis for a lot that is 12.8 +-

    asked on October 26, 2016
  52. Elementary Stats

    A box contains two red balls, four green balls, and two white balls. You extract balls from the box with replacement 100 times. Eachh time you extract a red ball, you win $1; a green ball, you lose $0.50; a white ball, nothing happens. -Make a box model of

    asked on October 26, 2016
  53. math

    Determine the number of odd, nonrepeating three digits numbers that can be written using digits from the set {1, 2, 3, 4}.

    asked on April 14, 2015
  54. Math

    There are 9 boys and 12 girls at a party,everyone is wearing a pair of shoes.How many shoes are there

    asked on March 15, 2013
  55. Math

    Fun video rents videos for $1 per video plus chafes a $5 membership fee. Your equation should represent the total cost for renting any number of videos. write an equation Function Table

    asked on December 27, 2012
  56. math

    i don't know but the question is to circle the object that is heavier(shoe,sock,feather,marble,brick and tape measure)i know a brick,and the tape measure is heavy but i'm not sure about the shoe and the marble

    asked on October 27, 2012
  57. Physics

    A man (80kg) jumps from a 17 storey balcony (51 metres). How long would it take for him reach the ground? ~Sorry for the morbid example, we were just having a chat about it lol

    asked on July 3, 2012
  58. 8th grade

    A leaky faucet fills a 100 millimeter cup in 10 minutes. 1.how much water is wasted in a day?a week?a non leap year? 2.How long does it take to waste a kiloliter of water? (hint:1 kiloliter=1000000 milliliters)

    asked on August 19, 2010
  59. social studies

    hello, my homework page starts out with In 1979, muslim fundalists led a successful rebellion against the united states-backed shah of iran and took control of that country? my question is what country? i think the paper printed wrong were doing 1979

    asked on March 2, 2010
  60. 3rd grade

    why does a tennis ball go furthur than a beach ball? force and motion question

    asked on October 8, 2009
  61. web 1

    what do most virtual encyclopedias require after a trial period

    asked on September 16, 2009
  62. MATH

    What is the area of the region bounded by the lines x=1 and y=0 and the curve y= x-e^x^2? A. 1-e units squared B. e-1 units squared C. (e-1)/2 units squared D. (1-e)/2 units squared or E. e/2 units squared if you can show me how to get that please

    asked on February 23, 2009
  63. ?

    what happens the first time that buck answers the call of the wild? http://www.sparknotes.com/lit/call/ =)

    asked on November 29, 2006
  64. Maths

    Factorise 25k^2-20+(4/k^2)

    asked on February 7, 2018
  65. Yoruba

    Please help me translate : it burns the leaves,it dries the roots,it wither the flower,yet it is very useful

    asked on January 23, 2017
  66. Algebra

    Find an equation of variation in which y varies jointly as x and z, and y=4 when x=4 and z=1. Simplify

    asked on May 9, 2016
  67. Science

    What might be the functions of the chemical additives in body washes?

    asked on February 17, 2016
  68. chemistry

    what is thiosulphate

    asked on February 16, 2016
  69. Chemistry

    why is chemistry needed

    asked on February 16, 2016
  70. algebra2

    Please help me find the lcd (x+6)+(2x-1)

    asked on October 10, 2014
  71. Writing

    What are the five features of a letter.

    asked on March 13, 2013
  72. math

    is a marble heavy more than 1 pound

    asked on October 26, 2012
  73. physics

    A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. How far down range will he land?

    asked on October 18, 2011
  74. physics

    A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. How many seconds will the teacher be in flight?

    asked on October 18, 2011
  75. physics

    A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. What is the maximum height the teacher will reach in his flight?

    asked on October 18, 2011
  76. physics

    A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. What is the teacher's horizontal velocity?

    asked on October 18, 2011
  77. math

    change ratio to lowest terms.

    asked on November 4, 2010
  78. Hard Calculus

    f(x)= xsquared - 2x Determine whether y= f(IxI) is continous at x= 0 justify your answer

    asked on September 23, 2010
  79. social studies

    sorry to bother you again what does secular mean

    asked on March 2, 2010
  80. Math

    If a mixture requires 2 parts water to 3 parts of alcohol what percentage of mixture is water. How do I work this problem?

    asked on February 1, 2010
  81. precal

    solve cos(squared)x + sinx = 1 {0, 2pie)

    asked on January 12, 2010
  82. Math

    A train that is one mile long starts through a tunnel that is also 1 mile long. the train is traveling 15 miles per hour. how long does it take for the train to get completely through the tunnel?

    asked on August 29, 2011
  83. Criminal law

    "self induced intoxication negates mens rea, hence no crime is committed" justify the statement.

    asked on February 18, 2008
  1. English

    BBB. 100%

    posted on March 28, 2019
  2. English

    play nice

    posted on March 21, 2019
  3. math

    I suggest you use brainly.com

    posted on March 14, 2019
  4. math

    4 1/6 cups of almonds remaining.

    posted on December 4, 2018

    ^^ There right

    posted on October 18, 2018
  6. calculus

    You already answered the question, estupid

    posted on May 30, 2018
  7. Chemistry

    I'm not 100% sure, but I believe that it is dealing with the electronegativity. to determine the type of bond a molecule has, you use the electronegativity. You take the higher electronegativity and subtract the lower electronegativity. if the value is

    posted on March 22, 2018
  8. AP Literature

    yeah they're wrong...took the test on my own and found that i got an A

    posted on January 17, 2018
  9. language arts


    posted on January 16, 2018
  10. algebra


    posted on December 12, 2017
  11. Social Studies

    i hate scammers

    posted on June 2, 2017
  12. social studies

    I Only Use Jishka When My Grades Are Low So Please Dont Put Fake Asnwers

    posted on June 2, 2017
  13. Grammar

    The goal of target marketers is to develop unique marketing strategies that find unsatisfied customers to whom they can then offer superior value through more attractive marketing mixes. True or False

    posted on May 27, 2017
  14. Yoruba

    I mean translate to yoruba Please

    posted on January 23, 2017
  15. Math

    How the crap do i do this.

    posted on December 13, 2016
  16. Physics

    the angular speed, or 4pi

    posted on November 10, 2016
  17. Math


    posted on October 2, 2016