Questions Asked on
July 29, 2014

  1. Chem 2

    4) Calculate the solubility of calcium hydroxide, Ca(OH)2 (Ksp = 5.5 x 10-5) in grams per liter in: a. Pure water b. 0.10 M CaCl2

    asked by Jordan
  2. algebra

    The table below gives the value of a car over two years. Using an exponential best-fit model, after how many years is the car valued at 25% of the original value? Year 0 0.5 1.0 1.5 2.0 Value ($) 15,500.00 14,560.00 13,911.20 12,969.66 12,204.09

    asked by clara
  3. science

    two point charges of 5 micro culomb and 20 micro culomb are separated by a distance of 2m find the point on the line joining them at which electric field intensity is zero

    asked by aarya
  4. physics

    A 900kg car strikes a huge spring at a speed of 22m/s, compressing the spring 4.0m How long is the car in contact with the spring before it bounces off in the opposite direction? I found the spring constant to be 27225, which i know is right, but am having

    asked by Kevin
  5. geometry

    A rectangle is 14cm wide and 48 cm long. Find the measures of the acute angle between its diagonals. please help

    asked by Emma
  6. Chemistry

    Using Hess’s Law with the following data: N2(g) + O2(g) = 2NO(g) Del(H) = 180.7kj 2NO(g) + O2(g) = 2NO2(g) Del(H)= -113.1kj 2N2O(g) = 2N2(g)+ O2(g) Del(H)=-163.2kj Calculate Del(H) for the reaction: N2O(g) + NO2(g) = 3NO(g)

    asked by Dan
  7. Geometry

    Crazy hard question I don't get: "A sphere with radius 3 is inscribed in a conical frustum of slant height 10. (The sphere is tangent to both bases and the side of the frustum.) Find the volume of the frustum." I need a proof for this, and I don't know

    asked by Sheenybeany
  8. Chemistry

    Calculate the standard enthalpy change for the following reaction at 25 °C.? 2CH3 OH(g) + 3O2(g) -------- 2CO2(g) + 4H2O (g)

    asked by Fahra
  9. physics

    A small rock passes a massive star, following the path shown in red on the diagram above. When the rock is a distance 4e+13 m (indicated as d1 on the diagram) from the center of the star, the magnitude of its momentum p1 is 1.1e+17 kg ·m/s, and the angle

    asked by Zoey
  10. math

    A specially made pair of dice has only one- and two-spots on the faces. One of the dice has three faces with one-spot and three faces with two-spot. The other die has two faces with one-spot and four faces with a two-spot. One of the dice is selected at

    asked by Sunny
  11. Geometry

    The total area of all the faces of a rectangular prism is 22, and the total length of all its edges is 24. Find the length of the internal diagonal of the prism. Thank you!

    asked by Sheenybeany
  12. Chemistry

    how would you prepare 250 ml of 0.69m al2(so4)3 solution from a 2.0 al2(so4)3 stock solution

    asked by Sam
  13. Math

    Suppose you own a tour bus and you book groups of 20 to 70 people for a day tour. the cost per person is $30 minus $0.25 for every ticket sold. Gas and other miscellaneous costs are $200. Part a) Write the revenue and cost functions for this situation Part

    asked by Tim
  14. chemistry

    You have a 1.0 M stock solution of H2SO4 in a large flask. You need to dilute this to make a 0.25M solution of H2SO4 for an experiment. If you need exactly 100.0mL of the diluted solution, how would you make the diluted solution?

    asked by brit
  15. To Ms. Sue

    Ms. hi! I would like you answer for me one question that I just don't get it from my English homework and if you can explain me what is a subject-verb agreement in a simple way maybe a tip or something in order that I learn how to figure it out by myself

    asked by Shayna
  16. Math

    using sin(alpha-beta)=(sin alpha)(cos beta)-(cos alpha)(sin beta) use the identity to derive the result proof for : sin(alpha-beta) PLEASE PLEASE PLEASE HELP

    asked by Mari
  17. public speaking

    1. “To persuade my audience that drinking and driving laws should be stricter” aims for: A. passive agreement with a policy. B. active agreement with a policy. C. personal action to support a policy. D. personal agreement to support a policy.

    asked by sarah
  18. Finite Math

    suppose x sheets from a 500 sheet ream of paper have been used. Write an algebric expression to represent the number of sheets that are left

    asked by Helen
  19. electric circuit

    Some types of fuses used to protect electric meters have resistances of several ohms. Is this objectionable (a) in ammeter circuits and (b) in voltmeter circuits? Why?

    asked by Anne
  20. Trigonometry

    A plane flew 150 miles on a course of 220 degrees and then 130 miles on a course of 130 degrees. Then the plane returned to it's starting point via the shortest route possible. Find that shortest distance.

    asked by Ice
  21. PUBLIC SPEAKING

    One of the primary jobs of an informative speech is to: A. appeal to the emotions of the audience. B. ask them to do something with the information. C. communicate information accurately and clearly. D. entertain the audience.

    asked by Anonymous
  22. math

    1. Read the following statements: I. All trapezoids consist of two parallel sides. II. The base angles of all trapezoids are equal in measure. III. The lengths of the tall trapezoids legs are equal in measure. Which of the above statements are true? II

    asked by Anonymous
  23. SAT WRITING

    Please give me a score of 1-6 (one being poor and six being excellent). Also, please give me some feedback! Thank you in advance! Essay prompt: What motivates people to change? Essay: Many people know that eating junk food is unhealthy. Yet, they keep

    asked by Anonymous
  24. english

    Traditional african marriage is an advantage for men only,not women

    asked by joyce
  25. math

    A school booster club is selling T-shirts. The silk screening company is selling shirts to the boosters for $3 each, plus a one-time fee of $150 to cover supply costs. If the boosters want to make at least $300 in profits and they sell a shirt for $12, how

    asked by Mat
  26. public speaking

    2. “To persuade my classmates that cheating in an exam is just as wrong as plagiarism” is a: A. question of fact. B. question of policy. C. question of value. D. question of guessing.

    asked by sarah
  27. Writing

    Please give me a score of 1-6 (one being poor and six being excellent). Also, please give me some feedback! Thank you in advance! Essay prompt: What motivates people to change? Essay: Many people know that eating junk food is unhealthy. Yet, they keep

    asked by Anonymous
  28. Physics

    Why should a voltmeter have a hisg resistance? How should a voltmeter be connected to the componenets of which the voltage is being measured.

    asked by Harley
  29. PreCalculus

    Solve for x. sec(x)sin(x)=2sin(x) 0

    asked by Emma
  30. Chemistry

    A 30.00 mL sample of 0.1500 M hydroazoic acid (HN3; Ka = 1.9 x 10-5) is titrated with 0.1000 M KOH. Calculate the pH after the following volumes have been added: a. 0.00 mL b. 11.25 mL c. 22.50 mL d. 33.75 mL e. 45.00 mL f. 56.25 mL

    asked by Valencia
  31. English

    Could you help with the punctuation on this paragraph please! Therefore,supporting the fact that you can dress a diverse group of students one way, but they would not all believe or view things the same way. If there is a standard in place, then it would

    asked by lalo
  32. math

    Sue left her home at 6 A.M. driving her car at the rate of 50 miles per hour. At 8 A.M. her brother Kevin drove after her along the same highway, traveling at the rate of 60 miles per hour, in how many hours did Kevin pass Sue.

    asked by Chris
  33. English 2

    Expand each sentence below by adding words or phrases that modify the nouns. The questions below each item suggest details you can add. 1.People hook up machines to their telephones. What kind of people use machines? What kind of machines are used?

    asked by Melly
  34. English 2

    Expand each sentence below by adding words or phrases that modify the nouns. The questions below each item suggest details you can add. Messages request information. What kind of messages are heard? What information is requested?

    asked by Melly
  35. Calculus

    Find the scalar equation of a plane that is perpendicular to plane r=(-2,1,3)+s(0,1,1)+t(-1,0,3) and also intersects it along the line (x-3)/2=(y+1)/-3,z=1

    asked by Zac
  36. Algebra

    For nonzero numbers x,y, and z, 3x=4y and 12y=5z. What is z/x?

    asked by Anonymous
  37. Math

    Find an equation of the curve that satisfies the given conditions: (d^2y/dx^2)=6x, the line y=5-3x is tangent to the curve at x=1

    asked by Tim
  38. calculus 2

    use the simpsons rule with n=10, arc length y=^3sqaure root x, for 1

    asked by Ryan
  39. trigonmetry -math

    cos2acos2b + sqr(sin(a-b)) - sqr(sin(a+b)) = ?

    asked by arvind
  40. buisness statics

    Mean yearly salary of employes of a company wasRs20,000.mean yearly sakaries of male and female employes were Rs 20,800 and 16,800.find out the percentage of male and female employed by the company??b

    asked by simran
  41. Math

    Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove answer Thanks

    asked by Anonymous
  42. maths lit,life science,economics,history

    what career must i follow

    asked by asekho
  43. us history

    I was wondering if somebody can help me improve on my answers to these questions below. Thank you. One Explain the evolution of Cold War liberalism between 1945 and 1968, that is from the presidency of Harry S. Truman through John !@#$%^&ennedy and to

    asked by TayB
  44. geometry

    A bachelor spends one half of his salary on entertainment,one fifth on food,one tenth on clothes and one fifth on rent.What fraction of his salary is left?

    asked by Anonymous
  45. Physics -- check answer please

    Light travelling in water is incident on air refracts at an angle of 27 degrees. What is the angle of incidence? my answer: 37 degrees

    asked by Liz
  46. physics

    light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ: a) constructive interference will occur b) destructive interference will occur c) partial interference will occur d) none of the above

    asked by Liz
  47. Math

    Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove answer Thanks

    asked by Anonymous
  48. Math

    Two trains are travelling on parallel tracks both going from station A to station B.Train 1 leaves at 8 am, at 65 miles per hour. Train 2 leaves at 10 am, at 90 miles per hour. At what time will train 2 catch up to train 1?

    asked by Anonymous
  49. Calculus

    State the cartesian equations of two lines that make angle of 60 degrees with the line r=(1,3)+s(1,1)

    asked by Zac
  50. Math

    At a speed of 48 miles per hour, how mnay minutes will it take to drive 40 miles? Is it 32 minutes?

    asked by Anonymous
  51. English

    Hi, I need help with MLA citing. This is just an example paragraph but please tell me if Im citing correctly : Tom was sad. Howard states," Tom leaned over the table with disappointment" (Howard 23).

    asked by Natalie
  52. Math

    solve the following system of equations using matrices 4x-2y=7 7x+y=13

    asked by Keya
  53. phi

    How would the Kantian moral theory apply in resolving the negative effects on a community? (Points : 1) By treating persons in the community as ends in themselves, then companies will strive to provide quality products as well as to remedy any negative

    asked by jason
  54. PHYSICS

    WHAT DOES A DISPLACEMENT-TIME BALLON GRAPH REPRESENTS?

    asked by ANURAG
  55. Chemistry

    According to the experiment procedure, given that the NaOH solution has a concentration of 0.100M, and that the vinegar (acetic acid) has a concentration of 5.0%m/m (mass percent), what volume(mL) of titrant would be required to reach the "equivalence

    asked by Pauline
  56. math

    27 root 3 =3^b. Find the value of b.

    asked by lindsay
  57. math

    what are the factors of x^2-6x+12?

    asked by VAN
  58. math

    Show that 4/2^x = 2^2-x and hence or otherwise solve for x in the equation 2^x +2^x-2 =5

    asked by lindsay
  59. bussiness math lit and tourism

    What university and job can I get

    asked by Anonymous
  60. mathematics

    125,454 dollars take 30% how much is left

    asked by Paul
  61. us history

    I was wondering if somebody could help me improve on my answers to these questions below. Thank you. One: Despite Watergate, did not Richard Nixon's presidency start the Republican ascendency of the following period? Why and how did this happen? -1. Yes it

    asked by TayB
  62. Algebra

    please help me with this question. please explain this question to me and how you got the answer to the question. Solve the inequality. > 10 A. y < –16 B. y > –60 C. y > 4 D. y < –60

    asked by Amber
  63. business studies

    description of a business

    asked by hlulie
  64. Algebra

    please help me and explain how you got the answer. Solve the equation. y + (–6) = –9 A. –15 B. –3 C. 54 D. 3

    asked by Amber
  65. English 2

    Expand each sentence below by adding words or phrases that modify the verb. Questions after each item suggest details you can add. A French girl found them. Who was with the girl? In what time period did she find them?

    asked by Melly
  66. Math

    Please help me find the process or !@#$%^&tion rule if input numbers are 1;2;3;4 and output numbers are 4;8;16;32. Please help me

    asked by Reginah
  67. Math

    what is 3.50% of $875.00 and how do I do it on a calculator? I feel sooooo stupid....

    asked by Dropout
  68. vocabulary-suffixes

    What does the suffix mean in the word logical?Please,please help!!!!!

    asked by Leslie