Questions Asked on
July 18, 2010

  1. Chemistry

    Estimate the value of the equilibrium constant at 550 K for each of the following reactions. 1) 2CO(g) + O2(g) 2CO2(g) 2) 2H2S(g) 2H2(g) + S2(g) Thanks in advance!

    asked by Miguel
  2. math

    how many diferrent 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS? the ans. must be 90,720

    asked by sha
  3. Physics

    You design an engine that takes in 1.5 x 10^4 J of heat at 650 K in each cycle and rejects heat at a temperature of 350 K. The engine completes 240 cycles in 1 minute. What is the theoretical maximum power output of your engine? can you please also show

    asked by Brianna
  4. chemistry

    The ionization constant Ka of an indicator HIn is 1.0x10^-6. The color of the nonionized form is red and that of the ionized form is yellow. What is the color of this indicator in a solution whose pH is 4.00? Thanks!

    asked by George
  5. physics

    A horse pulls a cart with a force of 40lb at an angle of 30 degrees above the horizontal and moves along at a speed of 6mi/hr. A) how much work does the force do in 10 min? B) What is the average power (in horsepower) of the force?

    asked by James
  6. Algebra

    graph the equation x-3=y (where do I plot the points?) find the intercepts and then graph: 5x+4y=20 find the intercepts and then graph: 1.4x-1.3y=3.64 graph the equation using slope and y-intercept: y=10/7x +4 graph using slope and y-intercept: x+2y=8

    asked by Jacquie
  7. Physics

    You decide to take a nice hot bath but discover that your thoughtless roommate has used up most of the hot water. You fill up the tub with 270 kg of 30.0°C water and attempt to warm it further by pouring in 5.00 kg of boiling water from the stove. (a)

    asked by Anthony
  8. Chemistry

    The following reaction was monitored as a function of time: AB--->A+B A plot of 1/[AB] versus time yields a straight line with slope 5.2×10−2 . If the initial concentration of is 0.240M , and the reaction mixture initially contains no products, what are

    asked by Ellen
  9. Chemistry

    Which of the four factors affecting reaction rate is most important in each example below? Choose from among concentration, temperature, surface area, and catalyst. A? Extra dish soap is added to help cut the grease when washing a frying pan. =

    asked by Derrick
  10. algebra

    maria can shovel snow from her driveway in 35 min. tom can do the same job in 45 min. how long would it take maria and tom to shovel the driveway if they worked together?

    asked by Anonymous
  11. chemistry

    1) DETERMINE pH of each of the following 2-component solutions. 0.08M RbOH & 0.130M NaHCO3

    asked by seth
  12. physics

    a brick is dropped (0 initial speed) from the top of a building. the brick strikes the ground in 2.5 seconds. you may ignore air resistant so the brick is in free fall. A)how tall in meters is the building? B) what is the magnitude of the brick's velocity

    asked by josh
  13. Chem

    how many grams SO2 are produced when 20(g) FeS2 reacts with 16(g) O2? 4FeS2(g)+15O2(g)=2Fe2O2(s)+8SO2(g)

    asked by Gregg
  14. College Physics.

    A pendulum has a period of 1.8 s. a) Its mass is doubled. What is its period now? b) Its length is doubled. What is its period now? The original pendulum is taken to a planet where g = 16 m/s2. c) What is its period on that planet?

    asked by Jay
  15. College Physics 121

    A spring with a spring constant k = 50N/m has an unstretched length of 20cm. Find the work required to stretch the spring to a length of 30 cm. W = J ?? any help guys?

    asked by Jay
  16. Chemistry

    Please help, I am having trouble solving these problems at nonstandard temperatures. Methanol burns in oxygen to form carbon dioxide and water. Using the balanced reaction, 2CH3OH(l) + 3OH2(g) --> 2CO2(g) + 4H2O(g) 1) Calculate delta H(rxn) in kJ at 24

    asked by Miguel
  17. physics

    A suitcase (mass m = 15 kg) is resting on the floor of an elevator. The part of the suitcase in contact with the floor measures 0.50 m × 0.15 m. The elevator is moving upward with an acceleration of magnitude 1.00 m/s2. What pressure (in excess of

    asked by Anonymous
  18. Nutrition, Health, and Safety for Young Children

    What is a good Thesis Statement for my topice. My topic is Nutrition, Health, and Safety Training for Early Childhood Educators.

    asked by Susan
  19. physics

    A racing dog is initially running at 15.0 m/s, but is slowing down.How fast is the dog moving when its kinetic energy has been reduced by half? By what fraction has its kinetic energy been reduced when its speed has been reduced by half?

    asked by Andrea
  20. HELP ENGLISH LIT.

    what type of context clue is being used when a author helps explain a difficult word by describing the setting or scene? Contrast example comparrison expirence

    asked by Cody
  21. Chemistry

    You have 2 chemicals A (solid), but you do not know the exact composition od either one of them. You do know that all together, there is SOME combination of sodium, barium, chloride and phosphate (PO4^-3) present. You disolve both chemicals in water. then

    asked by Anonymous
  22. EARTH SCIENCE

    How are carbon dioxide and other trace gases thought to be potentially related to global warming? Are the levels of these gases in our atmosphere increasing or decreasing? Why? Finally, what are some of the observed climatic trends and possible

    asked by Anonymous
  23. Nutrition, Health, and Safety for Young Children

    What is a good purpose statement for discussing "why health, safety and nutrition strategies are important to identify and practice in an Early Childhood Education Program?

    asked by Ann
  24. physics

    A 2.0kg bag is held by a string to the ceiling as shown in the diagram below. A 10-g bullet travelling at 200m/s strikes the stationary bag. The height of the bad after the collision is 10cm. Assuming there is no friction, determine the speed, in metres

    asked by Tada
  25. math

    Jen, I will attempt to write the others out. #3)ADD: -57 + (-22) I got -79 #4)Subtract -2.3-(-8.8) I got -6.5 #7)perform indicated operation: -21 - (-9) I tried to underline ----------- -21 - (-21) I got -12 over o or undfined #8)Multiply:(4){-3/2} This

    asked by barbara
  26. chem11

    write out the balanced reaction for magnesium and copper (I) chloride solution. Mg2(s) + 4CuCl2(aq) -> 2MgCl2(aq) + 4Cu(s) is this right? i'm not sure exactly how to do this. Please help

    asked by helloworld:)
  27. calculus

    A ball has bounce coefficient 0 < r < 1 if when it is dropped from height h, it bounces back to a height of rh. Suppose that such a ball is dropped from an initial height a and subsequently bounces infinitely may times. Find the total up-and-down distance

    asked by fred
  28. Nutrition, Health, and Safety for Young Children

    What is a good thesis statement which discuss the overall wellness of young children and the role an Early Childhood Education Setting can play in a young child's health and well-being?

    asked by Sue
  29. friction

    A 15.0kg bix is released on a 32degree inclined and accelerates down the inclined at 0.30m/s^2. find the friction force impeding its motion.

    asked by Anonymous
  30. Math11U

    A company has been selling 1200 computer games per week at $18 each. Data indicates that for each $1 price increase, there will be a loss of 40 sales per week. It costs $10 to produce each game. a) State the revenue function b) State the cost function c)

    asked by Katya
  31. chemistry

    Balance the equation.. __Cu+__HNO3 -> __Cu(HNO3)2+__NO+__H2O

    asked by Anonymous
  32. Algebra 1

    Hello. I am having a bit of trouble understanding the following "Solve by Graphing. 3x + y = 5 -2x + 3y = 4" I know you can't see the graphing on this site, but I would really appreciate it if someone points me in the right direction in how to do this.

    asked by Tamir
  33. math

    The period T (time in seconds for one complete cycle) of a simple pendulum is related to the length L (in feet) of the pendulum by the formula 8T^2=Pi^2L. If a child is on a swing with a 10-foot chain, then how long does it take to complete one cycle of

    asked by R
  34. Math 11u

    A town has a population of 8400 in 1990. Fifteen years later, it's population grew to 12,500. Determine the average annual growth rate of this town's population. Round to the nearest tenth of a percent. (the answer in the book is approx.2.7) thank you for

    asked by Kerry
  35. math

    while riding a bike at a rate of 14 mph, Steven takes 1.2 hours to ride the entire length of a trail. how many hours would it take him to complete the same ride if he rode at 8 mph? how do you do this problem?

    asked by Julie
  36. chemistry

    balance the following equation, and identify the type of reaction. ZnSO4+SrCl2-> i think it's a double replacement reaction. But could someone please help me balance it. I'm not sure how.

    asked by v.c
  37. Algebra

    Atriangle has a base that is twice its height minus 4 feet. if the area is 15 square feet, find the height and base of the triangle.

    asked by Russell
  38. College Physics

    An electron orbits a proton at a radius of 5.38 10-11 m. What is the magnitude of the magnetic field at the proton due to the orbital motion of the electron?

    asked by Anonymous
  39. chemistry

    Determine the overall orders of the reactions to which the following rate laws apply: a. rate = k[NO2]^2 b. rate = k c. rate = k[H2][Br2]^1/2 d. rate = k[NO]^2[O2] I think the answers are: a. Second Order b. Zero Order c. First Order for H2 and One-half

    asked by Sara
  40. SCIENCE

    IF A TORTOISE AND A HARE ARE RUNNING IN A RACE. AND IN MY GRAPH I HAVE DISTANCE IN THE VERTICAL SCALE AND TIME IN THE HORIZONTAL SCALE. THE TORTOISE IS RUNNING AT A CONSTANT RATE WITHOUT STOPPING. BUT THE HARE IS CONFIDENT AND HE STOPS HOPPING AND WAITS

    asked by Anonymous
  41. geography

    the central location of india at the head of the india ocean is considered of great significance.why?

    asked by janvi
  42. ASAP

    can someone please make up an address and a phone number that i can use for my brochure? please. please. ASAP

    asked by office
  43. math

    Solve the equation 15.3 + 15 + 15.4 + 15.7 + x /5 = 15.4 thankyou

    asked by amanda
  44. physics

    A 2 kg brick is accidentally dropped off some scaffolding from a height of 20 m above ground levele.Calculate how much potential energy it will have lost by th e time it hits the ground.

    asked by Shally
  45. us history

    What was John !@#$%^&ennedy's focus/intentions for writing the book Profile in Courage?

    asked by Nishan
  46. math

    solve for unknown: log9 r=3/2 logG 2=1/3 Can you show me the steps how to solve this problems.Thank yo very much for your time

    asked by sandy
  47. chemistry

    in my text book it says that if the calculated value is less than or equal to 0.1 then the color of the conjugate base (In- in this case) predominates. does this mean that the solution will be yellow then?

    asked by George
  48. algebra

    Simply by removing factor 1 p^2-36/p^2-12p+36

    asked by jess
  49. science

    2. You are on the London Eye observational wheel, which is 135 m tall and rotates once every half-hour. What is your velocity (speed and direction)?

    asked by Anonymous
  50. algebra

    To determine the number of deer in a game preserve, a conservationist catches 523 deer tages them and let's them loose. Later 468 deer are caught, 234 of them are tagged. How many deer are in the preserve?

    asked by jess
  51. ENGLISH HELP!!!

    when did Romanticism became popular?? - before the Enlightenment - during the Enlightenment - at the end of the Enlightenment - a century after the end of the Enlightenment

    asked by Cody
  52. chem 11

    write the balanced equation for the electrolysis of water. What type of reaction is this?

    asked by Anonymous
  53. Chem

    How are these values used to determine percent? actual yield is quantity of a product found to be formed in a chemical reaction and theoretical yield is the amount of product predicted theoretical yield is larger because in experiments reactions might not

    asked by Gregg
  54. chem 11

    You have 2 chemicals A (solid) and B (solid), but you do not know the exact composition of either one of them. You do know that all together, there is SOME combination of sodium, barium, chloride and phosphate (PO4^3-) present. You dissolve both chemicals

    asked by Anonymous
  55. chemistry

    How many grams of FeCl2 should be dissolved in 1 kg of water to make its boiling point equal to 101.56 degrees centrigrade at atmospheric pressure of 1 atm? (Kb=0.52 degrees Celsius/m; solute is completely dissociated). Thanks!! =)

    asked by el
  56. algebra

    I need help with this equation. y + 4y = 6 (1) x = 9 - 4y (2) Thanks for the help.

    asked by sweetness
  57. INB

    I need to create a 7-12 slide powerpoint with 3 references for Wal-Mart Takes on the World Minicase. I don't know where to begin and I have a difficult time with research. Consider the following scenario: Your boss, the CEO of Wal-Mart, is interested in

    asked by Lori
  58. geometry

    how can i identify iif it is coplanar,collinear or neither

    asked by rose
  59. Physics

    Three masses, m1 (a mouse), m2 (a bear) and m3 (an elephant), are in circular orbits of radii r1, r2 and r3 around the sun. The masses obey the relation, m1 < m2 < m3. While r1 and r2 are equal to Earth's orbital radius, r3 is equal to Jupiter's orbital

    asked by Vahi
  60. math

    Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution for raw score = Raw score = 66, µ =60 , and ó =6

    asked by Anonymous
  61. Math (Algebra)

    Could I have someone check my work please? If I did something wrong please explain to me where I went wrong. Thank You. Example of the product rule to solve would be, (5^3)(6^3) Example of the quotient rule to solve would be, (4^2) / (8^2) Example of the

    asked by Lynn
  62. math

    Name: Barbara Dillon Date: July 18 2010 1. Divide 90÷18 =5 Answer is 5 2. Place the following set of numbers in ascending order. 22, –7, 8, –4, 12, –1, 14 Ascending order : -7, -4, -1, 8, 14, 22 3. Add 4. Subtract 5. Divide -18÷ -9 = 2 6. Evaluate

    asked by barbara
  63. Math

    Find the critical numbers of the function s(t)=3t^4+4t^3-6^2

    asked by Eileen
  64. od

    Temple Corp. is considering a new project whose data are shown below. The equipment that would be used has a 3-year tax life, would be depreciated by the straight-line method over its 3-year life, and would have a zero salvage value. No new working capital

    asked by linda
  65. algebra

    12-6x=3[2-4(x-6)] I KNOW THE ANSWER IS 11 BUT EVERYTIME I DO THE STEPS IT COMES OUT WRONG. COULD YOU SHOW ME DETAILED STEPS? Thankyou.

    asked by sue
  66. stats math

    Suppose x is normally distributed with a mean of 130 and a standard deviation of 25. Twenty-six percent of the values are less than what value? 123.5 114 136 146

    asked by thara
  67. chemistry

    you are right....I wrote it wrong. Does this mean that the solution will be more toward the redish side?

    asked by George
  68. Math11U

    Determine the maximum or minimum value. Use at least two different methods. y=3x(x-2)+5

    asked by Katya
  69. chemistry

    State three examples each of acids, bases, and salts commonly used in therapeutic processes

    asked by Art
  70. MATH

    what is th scientific notation for the number 385,000 i think 3.85x10^5

    asked by JULIE
  71. math

    a phone call cost $1.25 for the first minute $0.10 for each additional minutes.A 10 minutes phone call cost

    asked by julie
  72. EARTH SCIENCE

    Some factors that might influence solar radiation on the Martian surface

    asked by Anonymous
  73. Research writing

    What is he importance of literacy in our society?

    asked by Kyrkyya
  74. Math

    How do you find the perimeter and area of a right triangle?

    asked by Matt
  75. Reading Strategies

    what does "getting above your raisins" mean? thanks for answer my question:)

    asked by jenni
  76. Sci 245

    can anyone help me with the id of minerals: borax, calcite, corundum, graphite, gypsum, orthoclase feldspar, pyrite, quartz, talc, and topaz.

    asked by Norma
  77. 11th matriculation physics kinematics

    an aeroplane takes of at an angle of 45deg to the horizontal. If the vertical component of its velocity is 300kmph, Calculate its actual velocity. what is the horizontal component of it velocity?

    asked by shruthi
  78. Algebra

    The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C=4,000/200-2x What is the cost to remove 65% of the pollutant? Show all your work. What is the cost to remove 95% of the pollutant? Show all your work. What is the cost to

    asked by Tam
  79. umuc

    sample of 80 people randomly asked in casino shows that average lost per person is $160 with a sample standard deviation s=$40. Based on this data create a 95% confidence interval for population mean.

    asked by Sonya
  80. childcare

    how will a authoritarian and a authoritative solve a problem in they own way?

    asked by Dionn
  81. 11th grade

    in the heat of soultion lab what would happen to the delta T if the soultion CaCl2 was not stireed with the water?

    asked by Em
  82. science 225

    How much, how long, and how often are humans exposed to Malathion?

    asked by stumped
  83. math 157

    question #1 provide an approiate response. Write the next equation in the pattern 1+1=2 1+1+2=4 1+1+2+3=7 1+1+2+3+5=12

    asked by Anonymous
  84. math 157

    A receipt contains 3 ingredients, In how many different orders can all the ingredients be added.

    asked by Anonymous
  85. INB 205

    Wal-Mart Taking on the World Minicase Thank you Ms Sue. Now I need to find: Some statistics in regard to GNP and future growth potential for expanding Wal-Mart into India. What are the Government and Public Attitudes about American Products? Promotional

    asked by Lori
  86. Math

    Find absoulute maximum and absolute minimum of the function f(x)=2cost+sin2t

    asked by Eileen
  87. chemistry

    The initial state of a reaction is A2 +B2 –> 2AB. In the initial state of the reaction there are 6 A2’s present and 6 B2’s present. Suppose the reaction is carried out at two temperatures.Which of these situations represents the result at the higher

    asked by George
  88. algebra

    Simply by removing factors of 1 q^2-25/(q+5)^2

    asked by jess
  89. stats math

    An appliance store sells washing machines and dryers among other things. The average sale on washers and dryers is $530 with a standard deviation of $100. Suppose that sales figures on washers and dryers are normally distributed. If a sale is randomly

    asked by thara
  90. MATH

    2+3(8-4)=

    asked by Cody
  91. Microeconomics

    What is the supply, demand, and the price discrimination for John Q the movie? I have to write an enconomic principles paper about John Q, I have a full page typed already but im having trouble with the with the question above so can some one help me

    asked by LaTarial
  92. Pharmacy Practice

    describe patient's issues that may arise in an institutional pharmacy setting and identifies issues unique to institutional pharmacy settings.

    asked by Nancyg
  93. campbell

    what is indigenous identity

    asked by katrice
  94. math

    A sample of 8 persons is selected for a test from a group containing 40 smokers and 15 nonsmokers. in how many ways can the 8 persons be selected?

    asked by sha
  95. math

    is 5^3 = 5x5x5

    asked by julie
  96. math

    the number _________ is equal to 50,000+700+50+2

    asked by julie
  97. math

    If ann is 22 years old and terry is 10 years old, how many years ago was ann four times as old as terry

    asked by julie
  98. math

    what two number complete 7 9 8 10 ___ ___ 10 12

    asked by julie
  99. math

    mitch and jane met at the mall today. mitch goesto the mall every 3 day and jane goes to the mall every 5 days.how many times will they meet again in the next 3 weeks? is the answer 2 ????????

    asked by julie
  100. math

    3.65x10^4 is it 36,400

    asked by julie
  101. t test

    how to know exact t value using sample standard deviation and sample mean and sample size i think df is sample size -1 . we usually use approx value but to use exact value how to use t score table. and how we conclude whether it is two tailed test or one

    asked by Anonymous
  102. Managerial Accounting Practices

    Your general manager called you into his office to discuss an ongoing problem. He explains that in the past, whenever he wanted to know how the projected income statement might change if sales volume changes, it would take weeks to have the accounting

    asked by stacy
  103. history

    wher can i find information to help with this: How did the businesses of those like Morgan, Carnegie, and Rockefeller come to be so large?

    asked by chandice
  104. english

    How are stories used as a method of coping/a means of survival in Yann Martel's "Life of Pi" and Tim O'Brien's "The Things They Carried"? Specific examples please.

    asked by Mr. man
  105. statistics t test

    how to know exact t value using sample standard deviation and sample mean and sample size i think df is sample size -1 . we usually use approx value but to use exact value how to use t score table. and how we conclude whether it is two tailed test or one

    asked by Anonymous
  106. statistics

    the average weekly earnings of a production worker were $424. to know if wages, on average, have gone up since that time. To test this, you sample 64 production workers, and determine that their average salary is $432.69, with a sample standard deviation

    asked by Anonymous
  107. SCIENCE

    A TRAIN GOES FORWARD AT A SPEED OF 1M/S FOR 20 SECONDS. THEN IT STOPS AND GOES BACKWARD AT A SPEED OF 0.5M/S FOR 4 SECONDS. AFTER BOTH MOVEMENTS ARE COMPLETED, HOW FAR IS THE TRAIN LOCATED FORM ITS STARTING POINT? WHAT IS THE TRAIN'S FINAL LOCATION?

    asked by Anonymous
  108. 6th grade

    63728 divided by 9

    asked by Anonymous
  109. maths

    some information about symmetry

    asked by harini
  110. algebra

    give an ordered pair (a,b)that satisfy the following equation 3a-b=7

    asked by phoenix university
  111. orationn piece

    can u pls give me a oration piece about sports for atleat 250 words

    asked by tin
  112. Math

    question #1 provide an approiate response. Write the next equation in the pattern 1+1=2 1+1+2=4 1+1+2+3=7 1+1+2+3+5=12 question #2 Decide which of the variables described is likely to have a normal or near normal distribution. A) the amount of change held

    asked by Anonymous