Questions Asked on
May 10, 2015

  1. Stats

    Makers of a new pain-relieving medication claim that it relieves chronic pain faster than the current top-selling pain reliever on the market. A double-blind experiment was conducted in which 10 people who experience chronic pain were randomly selected to

    asked by Serena
  2. Chemistry

    A Balanced equation to represent the reaction between 1-pentanol and ethanoic acid. (Production of an ester)

    asked by Shantel
  3. Math

    Which set of best describes the numbers used on a scale for a standard thermometer? A.whole numbers B.rational numbers C.real numbers D.integers I choose Real Numbers if I am incorrect can you explain why.

    asked by Olivia
  4. Life orientation

    Describe the human rights violation that is taking place in your community or in the neighboring community.Give position on this issue.

    asked by Teboho


    asked by NKOSANA NHLAPO
  6. life orientation

    evaluate the extent to which the service delivery protest you have described in 2 above met or did not meet with processes that you have research end in 3 above

    asked by Anonymous
  7. life orintation

    TOPIC:campaign with responsibility CRITICAL FOR MARKS (A)introduction (3marks) (B) description of recent service delivery protest (5marks ) (C)research on processes of campaigns and protests (20 marks) (D)evaluation of current protests (20marks) (E)

    asked by Aaron
  8. Maths

    A village R is 10km from a point P on a bearing 025 from P. Another village A is 6km from P on a bearing 162. Calculate the distance of R from A

    asked by DollyP
  9. chemistry

    What salt results from the neutralization of phosphoric acid with potassium hydroxide? Would you set up an equation here?

    asked by Student101
  10. life oriantation

    in about one page describe a recent service delivery protest in your community or in the neighbourhood. What are the problems that the community faced? What did the community members do before the protest? Explain how the protest was conducted by the

    asked by lerato
  11. math

    A particle moves along the x-axis with position function s(t) = esin(x). How many times in the interval [0, 2π] is the velocity equal to 0?

    asked by Anonymous
  12. Math to hard please help

    The function rule C= 10n+26 relates the number of people n who attend a small concert to the cost in dollars C of the concert. Make a table of the input/output pairs to show the cost if 27,39, and 43 people attend.

    asked by stupid at math
  13. math

    While building a snowman, a large snowball is created at the rate of 5 inches per hour. How fast is the volume of the snowball changing at the instant the snowball has a radius of 10 inches?

    asked by Anonymous
  14. Trigonometry

    Use the trigonometric subtraction formula for sine to verify this identity: sin((π / 2) – x) = cos x

    asked by Tim
  15. Physics

    Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? Show proof of

    asked by Brian
  16. Geometry

    The figure below represents an oval shaped track. the rounded portion of the track are semicircles. If you were to run one lap of this track, how far would you run? Pic: LONG OVAL, THE WHOLE LENGTH IS 106 FT. THERE ARE TWO LINES NEAR THE OPPOSITE ENDS

    asked by Anonymous
  17. economic

    colgate is one firm of many in the market for toothpaste, which is in long run equilibrium. a) draw diagram showing colgate's demand curve, MR curve, ATC curve and MC curve. label colgate profit maximizing output and price

    asked by wan
  18. trig

    a vertical pole 35 feet high, standing on sloping ground, is braced by a wire which extends from the top of the pole to a point on the ground 25 feet from the foot of the pole. If the pole subtends an angle of 30 degree at the point where the wire reaches

    asked by thrish
  19. Physics

    A girl swings on a playground swing in such a way that at her highest point she is 4.1 m from the ground, while at her lowest point she is 0.8 m from the ground.What is her maximum speed? The acceleration due to gravity is 9.8 m/s2 .Answer in units of m/s.

    asked by Anonymous
  20. physics

    A bar of gold measures 0.15 m × 0.050 m × 0.050 m. How many gallons of water have the same mass as this bar?

    asked by Anonymous
  21. timpany

    a Ray of light makes an angle of 10 with the horizontal and strikes a plane mirror which is inclined at angle x to the horizontal . The angle x for which the reflected Ray becomes vertical is?

    asked by Shall I
  22. Trig

    A ladder 35.4 feet long is leaning against an embarkment inclined 62.5 degrees to the horizontal. If the bottom of the ladder is 10.2 feet from the embarkment, what is the distance from the top of the ladder down the embarkment to the ground?

    asked by thrish
  23. Art Ms. Sue?? Writeacher??

    Illuminated letters sent a visual message that communicated the content of the text. Which portion of the fifteenth-century population benefited most from illuminated letters? -the wealthy -the monks -the scholars -the illiterate*** Thank you for your

    asked by Amy
  24. Physics

    two stars with equal mass of 4.0x10^15 kg are separated by a distance of 2 km. They are moving in circular obits around the middle between the two stars. What is the speed of the stars?

    asked by Ricky
  25. Trigonometry

    Can you show steps on deriving the identity from the sum and difference formulas for cosine: sin a sin b = (1 / 2)[cos(a – b) – cos(a + b)]

    asked by Tim
  26. Chemistry

    A student was asked to prepare a sample of copper(ii)sulphate crystals(CUSO4.5H2O) given 5g of of copper (ii)oxide (CUO) as the starting material.if 10g of dry crystals of CUSO4.5H2O were obtained,calculate the percentage yield???

    asked by Newton
  27. Physics

    Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase with each other. The light

    asked by Brian
  28. Chemistry

    I need to figure out whether NaNO3 is saturated, unsaturated, or supersaturated in a 3 molal solution at 40 degrees Celsius. I am completely stuck right now, and am not sure where to go with this.

    asked by anonymous
  29. Geometry

    Determine the vertices of rectangle ABCD, where AB = 2BC. a) rectangle ABCD A) (0,0) B) (8,2) C (_,_) D (_,_) So far I just found the midpoint of A and B and got (4,1) but i don't know what to do after that. THe slope is 1/4, so i was thinking of finding

    asked by starburst
  30. chemistry

    Iron-59 has a half-life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a new sample of iron? Show all calculations leading to a solution. I am really confused on how to find t here? Can someone help? I can set up the rest of the

    asked by Student101
  31. Algebraic Geometry

    A 33 kilometer bicycle race course is designed in the shape of a triangle. The first leg of the race is 5 km shorter than the second, and the third leg is twice the first. Find the distance of each leg of the race.

    asked by Mo mi
  32. Chemistry

    How do I calculate the molality of a saturated solution of KCl at 70 degrees Celsius? I have gotten the moles of KCl (.66) but am not sure where to go from there.

    asked by Mathieu
  33. Physics

    Laser light of wavelength 632nm is incident on a diffraction grating having 600 lines per mm. Determine the angular separation between the first and second order maxima

    asked by Felicia
  34. Maths

    Anyone, please help: The figure below, not drawn to scale is made up of a square, a rectangle and a triangle, 1/6 of the square is shaded, 1/5 of the triangle is shaded and 1/4 of the rectangle is shaded. IF THE SHADED AREA IS 7/17 of the shaded area of

    asked by JJJ.Sarah
  35. chemistry

    estimate the boiling point of Pcl3

    asked by Anonymous
  36. maths

    what least number must be added to 630 to make the sum a perfect square? find the perfect square and its square root.

    asked by shehzad
  37. math

    a locker combination has tow nonzero digits and digits can be used twice. the first number is 8.what is the probality that the second number is 8

    asked by Anonymous
  38. math

    population increasing at rate of 5% per year current population 7,000,000 what will it be in 12years

    asked by Anonymous
  39. mathsLiteracy,bussness and consumerstudies,economi

    Which career is available for these subject

    asked by tebello tumie Mokotso
  40. Economics

    What are the costs and consequences of providing the subsidies and welfare

    asked by Nokubonga
  41. chemistry

    The charge carrier concentration of GaAs at 100oC is 1.048*1011 cm-3. The charge carrier concentration at 280°C is 1.841*1017 cm-3. What is the bandgap of GaAs? Give answer in eV.

    asked by ocre
  42. Shabalala

    Four factors that could threaten or limit the core functions of the media

    asked by Nondumiso
  43. geometry

    The altitude of equilateral triangle ABC is 15. What is the length of a side of triangle ABC?

    asked by Tameka
  44. chemistry dont know how to do it

    dG for the formation of Hi(g) from its gaseous elements is -20.2 kj/mol at 500k. when the partial pressure of HI is 10 atm, and I2 0.001 atm, what must the partial pressure of hydrogen be at this temperature to reduce the magnitude of dG for the reaction

    asked by Anonymous
  45. Criminal Justice/Family Violence

    Criminal prosecution of physical abuse is more common than: A. the prosecution for damaging a child’s self-esteem. B. the prosecution of emotional maltreatment. C. the prosecution of emotional humiliation. D. the prosecution of verbal abuse. I think it's

    asked by Pat
  46. Chemistry

    How much water must be added to make 500 ml of 12.0 M HCl to 1.0 M HCl (500mL• 12M) / 1.0M =6000m Is this correct?

    asked by Carl
  47. ELA

    .   Which of the following is the best opening sentence for a business letter that you want to sound fairly informal?       A. This letter is to make you cognizant of our receipt of your order.  B. Your order of February 10 arrived in our office

    asked by Brooklyn
  48. Chemistry

    A mixture of powdered carbon and an oxide of lead was heated producing lead metal and carbon dioxide.when 13.70g of the lead oxide was reduced to lead by carbon,960cm^3 of carbon dioxide measured at r.t.p was formed. Calculate the empirical formular of the

    asked by Newton
  49. thermodynamics

    find change in enthalpy and change in entropy when liquid water at 30¡ãc is converted to steam at 40 bar,375¡ãc.

    asked by yajju
  50. physics

    sixty complete waves passes a particular point in 4 seconds if the distance between 3 successive troughs of the wave is 15m calculate the speed of the wave

    asked by eniola pelumi
  51. prob & stat

    In a random sample of 63 women at a company, the mean salary is $48,902 with a standard deviation of $5270. In a random sample of 50 men at the company, the mean salary is $53,454 with a standard deviation of $4677. Construct a 95% confidence interval for

    asked by sweet12
  52. chemistry

    A current of 8.959 milliamps (10-3 A) is measured flowing through a tungsten wire of diameter 0.1 mm and 9 cm long when 1.7 mV is applied. What is the resistivity of tungsten? Express your answer in ohm-m.

    asked by ocre
  53. chemistry

    You are operating an X-ray tube with a molybdenum (Mo) target by applying an acceleration potential of 50 keV. Calculate the values of two characteristic wavelengths, λKα and λSWL. Express your answers in meters.

    asked by ocre
  54. Criminal Justice/Domestic Violence

    Children are at risk for being victimized by family violence and for perpetrating it against others. Research and theory suggest that some forms of victimization increase the risk of: A. juvenile criminal offending. B. inappropriate choices. C. smoking. D.

    asked by Pat
  55. Stats

    Employees in a large company are entitled to 15-minute water breaks. A random sample of the duration of water breaks for 10 employees was taken with the times shown as: 12, 16, 14, 18, 21, 17, 19, 15, 18, and 16. Assuming that the times are normally

    asked by Stat
  56. math

    The efficiency e of a gasoline engine as a function of its compression ratio r is given by e =1− r1−γ , where γ is a constant. Find γ for e = 0.55 and r = 7.5.

    asked by Mat
  57. math

    A news papers profit is $25 per year for each of it's 5500 subscribers. Management estimates that the profit per subscriber will increase by 1 cent for each additional subscriber over the current 5500.How many will bring a total profit of $180,000

    asked by antonio
  58. Math

    If the line through (x,1) and (0,y) is coincident with the line through (1,4) and (2,-3), find x and y.

    asked by Allyssa
  59. Probability

    What is the rule for the sequence 20, 17, 13, 8, 2? I've been trying to answer it by second difference method but still don't get correct formula.

    asked by Kenneth
  60. thermodynamics

    dG for the formation of Hi(g) from its gaseous elements is -20.2 kj/mol at 500k. when the partial pressure of HI is 10 atm, and I2 0.001 atm, what must the partial pressure of hydrogen be at this temperature to reduce the magnitude of dG for the reaction

    asked by Anonymous
  61. chemistry

    what is the solubility in grams of KCL3(s) per 100 ml of water?

    asked by Anonymous
  62. Maths

    A total of 80 pupils take part in a mathematics test and the average score was 69 marks. Given the average score of the boys was 75 marks and the average score for the girls was 65 marks. find the number of boys who took the test.

    asked by Isarah
  63. physics

    sixty complete waves passes a particular point in 4 seconds if the distance between 3 successive troughs of the wave is 15m.calculate the speed of the wave

    asked by Anonymous
  64. Social sciences grade 9

    What are the ideologies and history of the following: *USSR *USA *political sanction

    asked by Bongiwe gamede
  65. English

    A speech on Introducing a guest speaker

    asked by Nokubonga
  66. chemistry

    In generating the synchronous spectrum, it is not necessary to specify the wavelength range, why?

    asked by Emma
  67. Chemistry

    My teacher is an idiot and wont teach our class and im panicking so please help anyone. Given the following equations enthalpy values, determine the heat of reaction (kj) at 298k for the reaction: B2H6(g)+6Cl(g)=2BCl3(g)+6HCl(g)

    asked by Kevin
  68. Chemistry (Acids and Bases)

    What is the pH of a 0.400 molar HCl solution? I did -log(.4)=.398. That seems too low. I think I need to find the molarity (M) of the solution, but I can't find it with the given information.

    asked by Mark
  69. Algebra 1

    A teacher graded the tests for each of her students. She calculated a mean grade of 80 and a standard deviation of 3. One of her students, Katrina, had a z-score of 2. What grade did Katrina get on the test?

    asked by Jacob
  70. chemistry

    calculate the solubility in grams of KCL3(s) per 100 ml of water

    asked by emily
  71. algebra

    find the amount of money in an account after 10 years if a principal of $2500 is invested at 3.5% interest compounded quarterly. show work please I got 2250 but my book shows 3542.27

    asked by jaimecarlon
  72. chemistry

    describe the detector used to acquire UV-Vis Spectra in the entire UV-Visible spectral range at the same instant (ie. not sequential scanning of wavelengths) HELP PLEASE It is due monday :((

    asked by briam
  73. algebra

    Assume the national debt D increases at an annual rate of 5% and that the debt in 2000 was 57 billion dollars. This means that D = 57(1.05t ), where t is the number of years after 2000. In what year will the debt have doubled?

    asked by Neil
  74. analytical chemistry

    DrBob222, it is me again. Continue the question 5mL of a solution A (unknown concentration) was transferred into sic 25mL volumetric flask. The following volumes of a standard solution of A with with a concentration 75ppm were added to the flask: 0mL,

    asked by katy
  75. chemistry

    Higher to noise ratios can be achieved in FTIR spectra compared to spectra from dispersive IR instruments. How is such a useful feat achieved in FTIR

    asked by Emily
  76. Math

    Can you help me to understand the meaning of reduction?

    asked by Olivia
  77. math

    If 50100 dollars is deposited in an account for 14 years at 5.35 percent compounded continuously , find the average value of the account during the 14 years period.

    asked by Irina
  78. Math

    (a) Find the present value of $ 4600 per year flowing uniformly over a 10 -year period if it earns 5.3 % interest compounded continuously. (b) What is its final value?

    asked by Irina
  79. Stats (Math)

    Assume that Science scores on a 25-point quiz for a random sample of 5 students were drawn from a normal population. The assumed variance was 20 while the recorded variances were: 18, 16, 10, 13, and 23. You suspected that the variance is actually higher.

    asked by Leeroy
  80. Chemistry

    A 94 mL vanillin solution with a concentration of 0.017 mol L-1 was made by extraction from 24.41 g of vanilla pods. Calculate the percentage of vanillin in the vanilla pods. It would be helpful if you could explain to me the process to work out this

    asked by Jessica
  81. American Goverment

    When Congress prepares a budget (Points : 1) it collects estimates from each Executive department separately. it receives a unified budget prepared by the President’s Office of Management and Budget. it figures out on its own how much each department

    asked by christopher
  82. math


    asked by rahul
  83. wave optics

    what kind of waves sensitive human ear

    asked by abdulhayi musa
  84. science

    Is glycerol a fat, carbohydrate or protein?

    asked by tom
  85. maths

    find the gretest number of seven digits which is a perfect square. also find its square root

    asked by shehzad
  86. 7th of 850.000 dollars

    hi steve please help me don't now how to figure this ,--- a 7th of 850.000 dollars what would my part be thank you michael

    asked by mike
  87. medical billing

    new patient office visit excision inflammatory cystic scalp lesion cot code

    asked by debra
  88. Creative arts

    I need a monologue for girls to present in front of the whole school tomorrow

    asked by Bongiwe gamede
  89. Math

    Tobias is helping his uncle paint the side of a barn. Each can of paint covers 80 square feet. If the side of the barn is 10 feet high and 15 feet wide, how many cans of paint will Tobias need?

    asked by Laura
  90. Pre-calculus ( Absolute value)

    Why does |7 + 3x| = x -1 have no solution? I could plug in, for example 5, and the answer would be positive. Thank you =)

    asked by Lucina
  91. Math

    Given Perimeter of triangle is 26 inches. Side A is 3 inches longer than B. Side C is 1 inch shorter than twice side B

    asked by Tom
  92. maths

    Mr and Mrs Cheng went on an excursion with their 6 children. An average amount of $84 was spent by each adult while an average amount of $62 was spent on each child. What was the average amount of money spent on each person?

    asked by classics
  93. English

    We had a chart from A-Z for Anthem by Ayn Rand. For each letter much be at least rhetorical device or a mood or tone. I need help with letters K, Q, W, V, X, Y, Z

    asked by Jessica
  94. maths

    simplify the square root of 20 minus the square root of 5 plus the square root of 45

    asked by john
  95. S.S

    The merrimack and the monitor changed naal warfare because they engaged in the first battle between A. metal covered ships B. wooden ships C. aircraft carriers D. ships carrying guns I say its B, please check.

    asked by anonymous
  96. Math

    Solve for y, state the m and b, and graph. X-3y+9=0

    asked by Jim
  97. matrices

    Given B = 0 1 0 0 0 1 1 0 0 , show that B^3 = I

    asked by Neil
  98. Organic Chemistry

    any o-chemists out there? Some help would be greatly appreciated. So I have this compound, it has 5 C's total, a bromine at one end and 2 methyl groups coming off the 3rd C from the bromine and an OH group at the end. like this: Br-CH2-CH(CH3)2-CH2OH. Now

    asked by paul
  99. English

    Would knowledge be considered a theme in Anthem by Ayn Rand?

    asked by Jessica