Questions Asked on
May 21, 2011

  1. Chemistry

    Which equation shows conservation of mass and charge? A.NH4Br → NH3 + Br2 B. 2Mg + Fe3+ → Mg2+ + 3Fe C. H2SO4 + LiOH → Li2SO4 + H2O D. Cu + 2Ag+ → Cu2+ + 2Ag It's either b or d, since they both have two elements with an oxidation number of 0. Which

    asked by Angie
  2. Chemistry

    Calculate the mass of NaCl produced when 5.50 moles of Sodium reacts with excess chlorine gas.

    asked by Zach
  3. Physics

    the only part i cant figure out is the max static friction force that acts on the block. please help show me how to find it Suppose a block with mass 2.00 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is

    asked by sarah
  4. sociology 101

    Using miner's approach describe shoppers in a supermarket

    asked by Anonymous
  5. Human Relations Part 1

    1. Strong language often means A. weak feelings. B. risk-taking. C. strong feelings. D. shared knowledge 2. Which of these statements is true? A. A good attitude can make you tired. B. Being tired makes it harder to have a good attitude. C. A good attitude

    asked by anonoymus
  6. Chemistry

    calculate the total amount of heat needed to change 500g of ice at -10*C into 500g of steam at 120*C. do this by calculating the ehat required for each of the following steps and adding to get the total: step 1. ice (-10C)-> ice (0C) step 2. ice (0C) ->

    asked by Lyila
  7. physics

    Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric

    asked by Kelli Kenyon
  8. algebra

    Who saw the brontosaurus enter the restaurant

    asked by Steven
  9. math

    A triangle has a base of 7 ft. and an altitude of 15 ft. Find its area to the nearest tenth. Choose the best answer from the options below: A 52.5 ft² B 53.5 ft² C 54.5 ft² D 55.5 ft²

    asked by makeeda
  10. maths

    a cube haas a volume of 27cm3 what is the length of one side of the cube

    asked by holly
  11. Physics(Please Help!!)

    Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric

    asked by Kelli Kenyon
  12. Geometry

    A cylinder has a volume of 200in^3 Determine the volume of a cone whose radius and height are equal to that of the cylinder.

    asked by JOY
  13. physics . really need help

    An electric iron of 500 W power is used daily for 30 minutes. If the cost per kW.h is $0.10, what is the weekly expense in using the electric iron??

    asked by ashley --- HELP PLEASEE!!!
  14. geometry

    What is the volume of a square pyramid with base edge 2cm and height of 2cm. I came up with 8 cm^3

    asked by JOY
  15. math 120

    a sample of 12 observations taken from a normal distribution produced the following data. 13 15 9 11 8 16 4 9 0 14 16 12 . construct the 95% confidence interval for mean

    asked by umray
  16. Science

    I'm in 6th grade and I need help for my science project. I don't even know what to do. Any fun science projects for 6th graders?

    asked by Marissa
  17. math

    A circle has a circumference of 110.6 mm. Find its diameter to the nearest tenth. Choose the best answer from the options below: A 35.2 mm B 36.2 mm C 37.2 mm D 38.2 mm

    asked by makeeda
  18. maths

    a cube has a volume of 27cm3 what is the length of one side of the cube

    asked by molly
  19. Science

    A battery of emf 12v nd internal resistance (r) 1.5votls is connected to an external resistance (R) of 3ohms. (1.) Cal, the current flowing in the circuit. (2,) the p.d draw across the 3ohms resitor and the internal resirtance. (3) determine Voltage of the

    asked by Usoro
  20. epidemiology

    A new screening test for a disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Four hundred (400) people are screened at a clinic during the first year the new test is

    asked by mona
  21. physics

    A ball of mass Ml = 0.250 kg and velocity V01 = +5.00 m/s (see Figure) collides head-on with a ball of mass M2 = 0.800 kg that is initially at rest. No external forces act on the balls. a) What was the kinetic energy of the first ball before the collision;

    asked by Fabiana
  22. Precalculus

    A woman standing on a hill sees a flagpole that she knows to be 60 ft tall. the angle of depression to the bottom of the pole is 14 degrees and the angle of elevation to the top of the pole is 18 degrees. find her horizontal distance to the flagpole.

    asked by Mojo
  23. cultural diversity

    Will the rate of intermarriage of Blacks and Whites someday reach the same levels as for white ethnics in the US? Does it matter if the rate of Black/White intermarriages does eventually reach the level for white ethnics? Explain your thinking on this.

    asked by Anonymous
  24. chemistry

    in 1807 the English chemist Humphrey Davy passed an electric current through molten potassium hydroxide and isolated a bright, shiny reactive substance. He claimed the discovery of a new element, which he names potassium. In those days, before the advent

    asked by kimberly
  25. Precalculus

    A woman standing on a hill sees a flagpole that she knows to be 60 ft tall. the angle of depression to the bottom of the pole is 14 degrees and the angle of elevation to the top of the pole is 18 degrees. find her horizontal distance to the flagpole.

    asked by Mojo
  26. Social Studies

    I just need the answer to one question in Florida Studies week 14. I brought mini assessment home to grade and left the papers at school. Question 13 What di the king of spain do after getting Florida back? I think I know the answer but want to be sure.

    asked by Debbi
  27. Math

    In triangle ABC, D and E are midpoints of AB and AC, DE=4x and BC=2x+48. Find BC. Thanks So Much!!

    asked by Alana
  28. Math

    What is the distance between the parallel planes 2x+y-3z=13 and 2x+y-3z=35?

    asked by sophie
  29. Physics

    A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when

    asked by Anonymous
  30. maths

    calculate the surface area of the following prism cuboid; 2cm 6cm 4cm what is the surface area of the cuboid

    asked by molly
  31. math

    A man buys 2pens and 4 pencils and gives a hundred rupees note to shop keeper . Shopkeeper ask him to pay Rs10 more to take 4pens and 2pencils. If he bought 2pens and 3pencils how much would the man get back from shopkeeper?

    asked by Anonymous
  32. GEOMETRY

    FIND THE LATERAL AREA OF A RIGHT PYRAMID WHOSE SLANT HEIGHT IS 18mm AND WHOSE BASE IS A SQUARE WITH AN AREA 121mm^2

    asked by JOY
  33. math

    Convert --→ 4.2 g = ______ kg. Choose the best answer from the options below: A 0.42 kg B 0.042 kg C 0.0042 kg D 0.00042 kg

    asked by makeeda
  34. math

    A trapezoid has bases of 15 ft. and 9 ft. and a height of 8 ft. Find its area. Choose the best answer from the options below: A 95 ft² B 96 ft² C 97 ft² D 98 ft²

    asked by makeeda
  35. math

    Convert --→ 678,000 cm = ____ km. Choose the best answer from the options below: A 5.78 km B 6.78 km C 67.8 km D 678 km

    asked by makeeda
  36. physics

    A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when

    asked by ryan
  37. math help

    Find the midpoint of A(5, 3) and B(3, -5). Place your answer in (x, y) notation with NO spaces.

    asked by BreAnna
  38. science

    a body is moving with a uniform acceleration travels 24m in the 6th second and 44m in the 11th second. find 1). acceleration 2). uniform velocity of the body

    asked by Abhilash
  39. Chemistry

    Stomach acid is 0.02M HCl. A 330mg antacid tablet is 41% magnesium hydroxide and 36.2% sodium Bicarbonate. What is the volume of acid that can be neutralized by one tablet?

    asked by Alex
  40. History

    Create a timeline tracking the major themes/paradigm shifts in American History from the Columbus's voyages through the Mexican-American War (1846-1848

    asked by Demarauis
  41. Life orientation

    In 1oto15 lines critically discuss 5 ways in which the human or enviromental problem impact on the community

    asked by Zanele
  42. english

    what a business man need to know about nigeria concepts of personal space and rules of social behaviour in order to conduct business successfully in that country

    asked by Anonymous
  43. math

    Find the volume of a pyramid whose base is 6 ft. by 5 ft. and has an 8 ft. height. Choose the best answer from the options below: A 50 ft³ B 60 ft³ C 70 ft³ D 80 ft³

    asked by makeeda
  44. geometry

    A square pyramid has a volume of 196 cm^3. Determine the height of the pyramid if the edges of the base measures 7cm.

    asked by JOY
  45. calculus

    Using an integration formula,what is the indefinite integral of (sign for integral)(cos(4x)+2x^2)(sin(4x)-x)dx. Any help very much appreciated.

    asked by gerrard
  46. algebra

    How do i solve this complex fraction?? X+3/3x^2/6x^2/(x+3)^2

    asked by makenzie
  47. substance drug addiction

    A clear explanation of drug addiction how human factor that may cause ill health, accidents, crises or disaster.

    asked by Ronny
  48. Computers

    Why is the popularity of the internet growing more and more everyday?

    asked by JoshelaT
  49. chemistry

    i have two questions. 1. generally speaking, if the pressure of a gas is tripled, what will happen to its volume? 2. If I take 2000L of gas at STP and squish it into a gas 15.0L gas cylinder, what will be the pressure inside the cylinder, assuming the

    asked by me
  50. math

    The area of some shape varies directly with the square of its side. If a shape with 2cm sides has an area 10cm^2,what would be the area of a shape ofthe same type with side of 3cm.

    asked by leroy
  51. Geometry

    What is the volume of a right hexagonal pyramid with base edge of 1 cm and height of 2cm Would I use V=BH 6(2)=12cm^3

    asked by JOY
  52. math

    Use quadratic formula to solve each equation 3k^2+6=6 I get 3/2 but I can't seem to get the other half of the equation such as x=3.7 or .26 etc...

    asked by beli
  53. statistics

    From a bag containing 6 black and 4 white balls, 2 balls are selected,one after the other,without replacement. Find (a) the probability that they are both black (b)the probability that they are both the same colour, (c) probability that they are different

    asked by Moses joseph
  54. math

    Convert --→ 73 yd = _____ ft. Choose the best answer from the options below: A 19 ft B 119 ft C 109 ft D 219 ft

    asked by makeeda
  55. Pre-algebra

    Hi need help answering this question? In your own words, define the term equation and then explain what it means to solve an equation. Give an example of an equation and its solution. Explain why it is the solution.

    asked by clarissa
  56. calculus

    Please help. What is the area of the region which is bounded by the x-axis and by the graph of y=(20(7-x)(x-3))/x^2. Thank you for any help.

    asked by Amy
  57. chemistry

    How much water must be added to 6.0 mL of a 0.05 M stock solution to dilute it to 0.020 M?

    asked by Anonymous
  58. Chemistry

    Stomach acid is 0.02M HCl. A 330mg antacid tablet is 41% magnesium hydroxide and 36.2% sodium Bicarbonate. What is the volume of acid that can be neutralized by one tablet?

    asked by Alex
  59. maths

    calculate the surface area of the following prism cuboid; scm 6cm 4cm what is the surface area of the cuboid

    asked by molly
  60. Economics

    (a) Explain what is meant by the term “natural monopoly”. (b) Construct a diagram showing the average and marginal cost curves, and the demand and marginal revenue curves for a natural monopoly. Use your diagram to explain why profit maximising

    asked by Giska
  61. physics

    Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km.

    asked by Anonymous
  62. chem

    An ethylene glycol solution contains 23.9 g of ethylene glycol (C2H6O2) in 86.9 mL of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.)

    asked by Sara
  63. algebra

    What is the value of the expression 2x to the 2nd power + 3xy -4y to the 2nd power when x = 2 and y = -4? please show how to solve this

    asked by T
  64. math

    Convert --→ 678,000 cm = ____ km. Choose the best answer from the options below: A 5.78 km B 6.78 km C 67.8 km D 678 km

    asked by makeeda
  65. math

    Convert --→ 48 in = _____ ft. Choose the best answer from the options below: A 3 ft B 4 ft C 5 ft D 6 ft

    asked by makeeda
  66. math

    Convert --→ 14 qt _____ gal. Choose the best answer from the options below: A 1.5 gal B 2.5 gal C 3.5 gal D 4.5 gal

    asked by makeeda
  67. physics

    Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km.

    asked by Anonymous
  68. algebra

    Annual profit in thousands of dollars is given by the function,p(x)=200square x-3 +10,000,where x is the number of items sold in thousands, x less than 3. describe the meaning of the numbers 3 and 10,000 in the formula. find the profit for 5 different

    asked by pamela
  69. english

    Can someone please check my work? Looking for opinions and grammatical errors. Thankyou. The following are my instructions on the assignment..... · Resource: Appendix G · Read two of the five paragraphs provided in Appendix G. · Write a brief paragraph

    asked by Icelocsgirl
  70. english

    which form of verb tense is the underlined phrase in the following sentence? You should have invited them to the party.

    asked by missy
  71. maths

    a prism has a cross sectional area of 8mm2 and a volume of 224mm3 calculate the length of the prism thank you so much for your help

    asked by molly
  72. math

    please help... determine if the argument is valid or invalid along with the appropriate form of argument. if harvard hustles then harvard wins harvard wins ___________________ harvard hustles are these statements: valid by law of detachment valid by law of

    asked by thawk
  73. science

    I'm in 5th grade and I'm doing a science project on if seawater can be desalted by freezing... I tested three cups of seawater, each with different times in the freezer.. I have my control which is the seawater at room temperature... What do I chart on my

    asked by Sam
  74. math

    (24x^4+24x^3=3x^2)divided 8x^3

    asked by latonya
  75. advanced algebra

    How would i go about solving this complex fraction? [(x/3)-4] / [5+(1x)]

    asked by maya
  76. physics

    A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when

    asked by Anonymous
  77. maths

    a prism has a cross section area of 8mm2 and a volume of 224mm3 what is the length of the prism

    asked by holly
  78. geometry

    How do you find the lateral area and surface area of a right prism whose height is 10 ft and whose base is a rombus with diagonals 12 ft and 12sq root of 3 ( DON'T KNOW HOW TO PUT SQROOT 3 IN)

    asked by JOY
  79. us history

    abrham lincoln as a young adult

    asked by ethan
  80. mathematics

    by prime factorisation method find the least positive number divisible by 700 and 364

    asked by Anonymous
  81. physics..

    Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km. kindly help me to solve this question..

    asked by Anonymous
  82. Algebra

    Can i get some help simplifying this fraction? ((x+5)/(x)) / ((x+5)/(2x))

    asked by Matthew
  83. maths

    Using your hourly rate computed in part a), what would Mary's gross earnings be for a pay period working an extra 10 hours overtime paid 2 times the regular rate of pay? For full marks your answer(s) should be rounded to the nearest cent.

    asked by SANY
  84. American Government

    1. Which of the following is NOT a criticism of the media's influence on public opinion? a. bias in reporting b. negative focus c. watchdog reporting d. visual imagery Answer: b 2. Which of the following is NOT a function of an interest group? a. supplying

    asked by Cheryl
  85. philosophy

    What is the influence of television commercials on American culture? If you could do something about TV commercials what would you do?

    asked by tiffany
  86. math am i right?

    the polynomial 0.041h - 0.018a - 2.69 can be used to estimate the lung capacity, in liters, of a female with height h, in centimeters, and age a. find the lung capacity of a 60 year old women who is 190 centimeters tall 9.04 liters

    asked by sam
  87. Microeconomic

    (a) Use a normal downward sloping demand curve and an upward sloping supply curve to illustrate and explain the “deadweight loss” from the imposition of a tariff on the imported substitute for a domestically produced product. (b) Use your diagram to

    asked by Sisca
  88. Microeconomic

    The Urban Transit Authority receives the following two pieces of expert advice: 1. “You should cut rail fares in order to encourage greater use. Raising fares will mean fewer customers and lower revenue.” 2. “You cannot afford to cut fares as this

    asked by Cath
  89. financail Management

    In Area O, there will be more savers than spenders. Old people have usually accumulated more wealth and usually tend to have it in more conservative investments (i.e. fixed income instruments), whether they be bank deposits, bonds, etc. In Area Y, people

    asked by Anonymous
  90. science

    WHEN A BOTLE OF ALCHOL SAYES IT IS 80 PROOF WHAT DO THEY MEAN

    asked by DEEK
  91. Math

    The length and width of the field as a ratio of 11:7. The width is 20 meters less than the length. How many m2 is the area?

    asked by Anna
  92. GEOMETRY

    DdETERMINE THE LATERAL AREA OF A PIPE THAT IS 12FT LONG AND 4 INCHES IN DIAMETER

    asked by JOY
  93. Life orientation(Reaseach)

    Critically discuss ways in which the woman or enviromental problem imacts the community

    asked by vallencia
  94. EDU230

    What type of character education would you implement in your school? Why? What would your expected results be.

    asked by Anonymous
  95. english

    Which of the following sentences contains an error? A) The student's attitude did not help her succeed. B) How many students are you planning to hire? C) Student's need to work hard if they want to receive good grades. D) Students' votes are important in

    asked by davis
  96. Chemistry

    A gas at 1.5 atm, 2.3L, and 23degreeC changed to 1.0 atu and 2.8L. What is the new temperature?

    asked by Zach
  97. hrm

    What are the critical coponents of a compesation strategy? Would these be the intrinsic and extrinsic rewards or something else.

    asked by mb
  98. 5th Grade

    write the number13 inbase six

    asked by Raja
  99. chemistry

    I need to write an equation that takes place at a temp of 400 K and with a catalyst of iron to make ammonia gas from gaseous nitrogen and hydrogen

    asked by sheila
  100. Computers

    What are some alternate ways that you can use the Internet?

    asked by JoshelaT
  101. physics of modern technology

    while throwing a football you exert a forward force of 50.0n, on it and push it forward a distance of 1.2m, how much work do you do on the football

    asked by sharlene scott
  102. Statistics

    Select the best interpretation of the correlation coefficient r = -.87

    asked by Scott
  103. Math

    How do you solve the problem: x minus 6.2 is less than or equal to 8 ; x=14

    asked by Christina
  104. geometry

    what is the volume of a right circular cone with radius 1cm and height 2cm

    asked by JOY
  105. college math

    Construct a truth table for ~q p

    asked by kozy