Questions Asked on
June 7, 2012

  1. Chemistry

    The voltage generated by the zinc concentration cell described by, Zn(s)|Zn2+ (aq, 0.100 M)||Zn2+ (aq, ____ M)|Zn(s) is 24.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode. Hi, I posted this question awhile back but I think it

    asked by Katherine
  2. chemistry

    Calculate the cell potential for the following reaction as written at 51 degrees C, given that [Zn2+] = 0.837 M and [Sn2+] = 0.0180 M. Zn(s) + Sn^2+(aq) = Zn^2+(aq)+Sn(s) E = __ V Reduction Half-Reaction Standard Potential Ered° (V) Zn2+(aq) + 2e– →

    asked by Katherine
  3. Chemistry

    A student completes titration by adding 12.0 mL of NaOH(aq) of an unknown concentration to 16.0 mL of 0.15M HCl(aq). what is the molar concentration of the NaOH(aq)?

    asked by Nina
  4. physics

    What is the minimum downward force on the box in the figure that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.38 and 0.28, respectively.

    asked by garth
  5. Physics! plese help

    A 1320-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the

    asked by Jessi
  6. math

    4. Gregory teaches martial arts. He charges a one-time processing fee of $5.00 and the cost of the classes is shown below. Let x represent the number of classes and y represent the cost of classes. Based on this information, what will it cost to take 10

    asked by Jane
  7. Physics

    Two spherical objects with a mass of 2.88 kg each are placed at a distance of 2.12 m apart. How many electrons need to leave each object so that the net force between them becomes zero?

    asked by Tanner
  8. Physics

    Pith Balls Two small pith balls, each of mass m = 17.7 g, are suspended from the ceiling of the physics lab by 0.8 m long fine strings and are not moving. If the angle which each string makes with the vertical is è = 42.6°, and the charges on the two

    asked by Jenipher
  9. physics

    a metal ball with a charge of 5.4x10^8 electrons is touched to another metal ball so that all the excess electrons are shared equally. What is the final cahrge on the first ball?

    asked by lindsay
  10. English

    Does this have paraelle structure Neither pesticides nor hormones are used in the production of organic foods.

    asked by Raven
  11. Physics

    Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.9x10-8m, and a tangential speed at the rim of 2.5x10-5 m/s. (a) What is the angular speed (the magnitude

    asked by Jessi
  12. Physics Equations of Motion

    Along a straight road through town, there are three speed-limit signs. They occur in the following order: 66 , 31 , and 19 mi/h, with the 31 -mi/h sign located midway between the other two. Obeying these speed limits, the smallest possible time tA that a

    asked by Jackie
  13. Physics

    The magnitude of the momentum of a cat is p. What would be the magnitude of the momentum (in terms of p ) of a dog having two times the mass of the cat if it had the same speed as the cat? What would be the magnitude of the momentum (in terms of p ) of a

    asked by BigJoe
  14. finance

    You have finally saved 10,000 and are ready to make your first investment. You have the three following alternatives for investing that money: 1) Captial cities ABC Inc. bonds with a par value of $1000 that pays an 8.75 percent on its par value in

    asked by Chris
  15. Chemistry.

    Calculate the volume of carbon dioxide produced when 0.5 tonnes of iron are produced. When iron oxide is heated with carbon monoxide, pure iron and carbon dioide are formed. Answer: 500000g/112g/mol =?/3 = 13392.9L

    asked by Jeconiah
  16. world geography (PLEASE HELP ME WITH THIS)

    ok i have to do a bibliography for nigeria and bolivia. those are both the title of my essays that i have to do. i researched and did everything i could to understand what they mean by a "bibliography" essay. i failed my first essay about bolivia because

    asked by tasha
  17. Physics(Please help)

    A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.44 x 104 rad/s to an angular speed of 5.05 x 104 rad/s. In the process, the bit turns through 1.77 x 104 rad. Assuming a constant angular acceleration, how long would

    asked by Hannah
  18. chemistry

    Record and calculate the following masses: (a)mass of empty beaker: 47.420g (b)mass of beaker plus Na₂CO₃:47.920g (c)Mass of Na₂CO₃:0.5g (d)mass of beaker plus NaCl:47.438g (e) Mass of NaCl (g):0.018g **I need help with these questions below** 2.

    asked by chelsea
  19. chemistry

    Consider the system 2N2O5(g) 2N2O4(g) + O2(g) + heat at equilibrium at 25C. If the temperature were raised would the equilibrium be shifted to produce more N2O5 or more N2O4? 1. more N2O4 2. more N2O5 3. There would be no effect.

    asked by luke
  20. eq

    Hanger is to closet as tree is to (A) forest. (B) branch. (C) bird. (D) ground.

    asked by beby
  21. Physics

    An electron moves on a circular orbit in a uniform magnetic field. The strength of the field is 1.00×10-5 tesla. The kinetic energy of the electron is 178.0 eV. (1 eV = 1 electron volt = 1.6 ×10−19 joules.) Calculate the radius of the orbit. (electron

    asked by Stryker
  22. physics

    a square with side length 2.0 cm has a charge of -1.0x10^-6C at every corner. What is the magnitude and direction of the electric force on each charge? What is the force on a fifth charge placed in the centre of this square? Does the sign of the fifth

    asked by lindsay
  23. geometry

    LM has the endpoints L(-1,1) and M(-5,-3) find the coordinates of the midpoint of LM

    asked by seth
  24. math

    find the equation that meets the given conditions: a varies directly as the square of r and a=9 pie when r=3

    asked by mathstuck
  25. Physical Geography

    Assume that a parcel of air is forced to rise up and over a 6000-foot-high mountain. The initial temperature of the parcel at sea level is 76.5°F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5°F/1000’ and the SAR

    asked by Sandra
  26. Algebra

    If the trend continued, in how many years would the median home value be $170,000? Show how obtained your answer using the linear equation you found in part c) Suppose that the width of a rectangle is three feet shorter than length and that the perimeter

    asked by Jewel
  27. mba

    from a set of 1000 observations known to be normally distributed the mean is 534 cm and sd is 13.5 cm. how many observations are likely to exceed 561 cm, how many will be between 520.5 cm 547.5 cm, between what limits will the middle 50% of the

    asked by quantitative analysis for managerial applications
  28. calculus (check my work please)

    Not sure if it is right, I have check with the answer in the book and a few integral calculators but they seem to get a different answer ∫ sec^3(x)tan^3(x) dx ∫ sec^3(x)tan(x)(sec^2(x)-1) dx ∫ tan(x)sec(x)[sec^4(x)-sec^2(x)] dx ∫

    asked by Jay
  29. Chemistry-stoichiometry ...help!

    Calculate the volume of carbon dioxide produced when 0.5 tonnes of iron are produced. When iron oxide is heated with carbon monoxide, pure iron and carbon dioxide are formed. Ans: 500000g/112g/mol= 13392.9L

    asked by Jeconiah
  30. Math

    The state of texas covers approxmiately 268,581 squared mi. During a hail storm the entire state is covered in 1billion meters of hail.(average radius of 1.4292cm)assume the hail falls so that the gaps of air are limited to 26% of the volume. As the state

    asked by Bill
  31. Chemistry-stoichiometry ...help!

    Calculate the volume of carbon dioxide produced when 0.5 tonnes of iron are produced. When iron oxide is heated with carbon monoxide, pure iron and carbon dioxide are formed. Ans: 500000g/112g/mol= 13392.9L

    asked by Jeconiah
  32. Math C30

    An airplane is leaving the first airport (A) at a bearing of 70 degrees. It then travels 238 miles to airport B. After fueling up, it leaves at a bearing of 120 degrees and lands at airport C. After fueling up it finally returns to airport (A) at a bearing

    asked by Jill
  33. English 7 - "Dear Reader" Letter Check

    Can you check my letter. It's a project for English. We are making our writing portfolios. I'm almost done I just have to do this. Dear Reader, This year I done some great improvement as a writer. I add great vocabulary in my pieces. When I'm reading, it

    asked by Laruen
  34. physics

    An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical

    asked by Akbar
  35. eq

    Desert is to oasis as ocean is to (A) water. (B) sand. (C) sea. (D) island.

    asked by beby
  36. Physics

    An electron travelling in the same direction that an electric field points initially has a speed of 4.21 ×107 meters per second. If the electric field has a magnitude of 2.28 ×104 N/C, how far does the electron travel before stopping?

    asked by John
  37. chemistry

    aluminum has a density of 27g/cm3 if a chunk of aluminum with a mass of 16g is placed in a graduated cylinder partially filled with water how much will the water level rise

    asked by Ana
  38. Algebra

    If the trend for the growth in the median home value continues=d, what would be its value in the year 2007? show how you obtained your answer using the linear equation you found in part c).

    asked by Jewel
  39. math

    Lawrence was training for a mararthon. He ran 9.59 miles total the first week of training. On the second week of training,he ran 16.58 miles total. How many more miles did he run the second week than his first? tip: It's deciamls subtraction

    asked by andy
  40. English 7

    foreshadow definition??? (literary term)

    asked by Laruen
  41. mba

    from a set of 1000 observations known to be normally distributed the mean is 534 cm and sd is 13.5 cm. how many observations are likely to exceed 561 cm, how many will be between 520.5 cm 547.5 cm, between what limits will the middle 50% of the

    asked by quantitative analysis for managerial applications
  42. math

    In a hypermarket promotional drive, the customers would only have to pay half of the original price on their second buy of the same item and one quarter of the original price on their third buy of the same item for some selected items. A customer bought 3

    asked by beby
  43. Physics-PLEASE HELP ASAP

    A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted.

    asked by Kevin
  44. maths

    if alpha and beta are the zeros of the polynomial 2x^2-4x+5 then find the values of (i)alpha^2+beta^2 (ii)1/alpha^2+1/beta^2 (iii)(r)alpha/beta+(r)beta/alpha (iv)alpha^-1+beta^-1

    asked by echo
  45. math

    5/4 times 5

    asked by cookiecrumbs
  46. Physics please help!

    A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted.

    asked by Gracie
  47. Math Algebra Find the Product

    (4y+5)(4y-5) 16y^2-20y+20y-25 16y^2-25 Am I correct

    asked by Adriana
  48. Geometry

    You have a figure with 6 sides. Each side measures 4.3m. What is the perimeter?

    asked by Angelique
  49. Health care

    Which has a greater influence on a person’s health: individual choices and actions (micro perspective) or community policies and resource availability (macro perspective)?

    asked by Lee
  50. Capstone Accounting

    Assessment of the strategic fit between Square D and Schneider. What are the pros and cons of a combination?

    asked by Sherry
  51. Physics

    Distance DC = FE = HG = AB = 2.7m FH = FD = GE = EC = CB = 2 m Find the supporting reaction of H, Member BD (Tension Force), Member CE, and Member CF? Figure Links: freeimagehosting 72dje

    asked by ToT_Alex
  52. Chemistry

    What is the molarity of a solution prepared by dissolving 2 moles of BaCl2 in enough water to make a 4.0 L solution? M= mols/L a. 0.5 M b. 8.5 M c. 17.1 M

    asked by Anonymous
  53. DeskToping

    _____ are symbols used to indicate changes that need tobe made to text. A. Proofreaders marks B. Correction Marks C. Insertion Marks D. Preview symbols I got A.

    asked by Sarah
  54. Math

    15) Marissa is 3 years older than her younger brother. Her older brother is twice as old as her younger brother. Her older brother is 18. How old are Marissa and her younger brother?

    asked by Sammyjoo
  55. Math

    a farmer wants to fence in part of her land so that her chickens will have thier own little area. if she only has 28 feet of fence, what is the area of the largest pen that she can build?

    asked by Alyssa
  56. physics

    Explain how an object can orbit a planet & why astronauts float around in the orbiting space shuttle

    asked by deresse
  57. mba

    from a set of 1000 observations known to be normally distributed the mean is 534 cm and sd is 13.5 cm. how many observations are likely to exceed 561 cm, how many will be between 520.5 cm 547.5 cm, between what limits will the middle 50% of the

    asked by quantitative analysis for managerial applications
  58. AP Literature & Composition

    For the life of me, I can't seem to remember the name of Whitney's brother from the shory story "The Premontion" by Joyce Carol Oates. I read years ago. Does anyone remember his name?

    asked by Gwen
  59. hum/111 critical thinking

    how might you use critical thinking to help someone who is struggling with low self-esteem and low self-worth to see beyond the media message they receive on a daily basics?

    asked by sharon
  60. algebra

    1/4x2

    asked by kulot
  61. Psychological Statistics

    Simply reporting measures of central tendency or measures of variability will not tell the whole story. Using the following information, what else does a psychologist need to know or think about when interpreting this information? A school psychologist

    asked by Den
  62. Physics

    A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted.

    asked by Jason
  63. Algebra 1B--Check Please!

    1.) Determine the equation of the axis of symmetry. y = -5x2 - x + 9 Answer 1.) x=3/2 2.) Determine the equation of the axis of symmetry. y = -6x2 + 3x - 4 Answer 2.) x=-2/10

    asked by Mackenzie
  64. math

    How can I calculate how long an amount of money will last if I spend x dollars per month, at the same time as the pot of money is attracting interest at y percent? Is thare a formula? Thanks

    asked by charlie
  65. Physics Please Help ASAP

    A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted. (answer has to be in nm)

    asked by Rebecca
  66. Math add the polynomials

    (7ab+4a2b4)+(a2b4-7ab) The 2 and 4 are on top of the a and b. (sqare #)

    asked by Adriana
  67. ECONOMICS

    Imagine that you manage a company that has invested $5 million in developing a new product, but has not completed development. At the last meeting, your salespeople report that the arrival of new competing products has reduced expected sales of your new

    asked by Booker Perry
  68. math multiply

    8xy(x+y) is answer 8x^2y+8xy^2

    asked by Adriana
  69. Math

    1.Let f(x)= x^2 - 5 and g(x)= 3x^2. Find g(f(x)). 2. Let f(x)= x^2 - 4 and g(x) -3x^2. Find f(g(x)).

    asked by Neil
  70. physics

    a motorisrt accelerates their car to 36m/s before realising they are over the speed limit and decelerates to 32m/s. calculate the distance traveled

    asked by nick
  71. geography

    Southwest Asia can best be characterized as A) an area with few resources. B) a desert with an arid and semiarid climate. C) a region of forests. D) an area of forests and grasslands. I think it's B, just checking! thanks in advance

    asked by Ali
  72. Science

    I left out the following statements. Thank you very much, Ms. Sue 1) The researchers in a group led by Paro, crossed the files of six generations. Thanks to this experiment, they were able to prove the temperature treatment changes the eye of colour of

    asked by Mike
  73. science

    what do you call a river or stream that runs or flows really fast?

    asked by samantha
  74. College Algebra

    How would I go about solving for x in the equation: ln(4x-2)-ln(4)=-ln(x-2) Thanks in advance

    asked by Rina
  75. ethics

    The outlawing of slavery and extending voting rights to women seem to indicate that ethics can have beneficial results. Give an example from the past that indicates a similar result or a current social policy that might be regarded as wrong, which

    asked by Anonymous
  76. functions

    F(x) x^4-11x^3+34x^2-6x-52 Write f(x)as the prouduct of two linear binomials and a quadratic trinomial

    asked by karen
  77. GEOMETRY

    Last fall, a gardener planted 56 iris bulbs. She found that only 49 of the bulbs bllomed in the spring. Find the empirical probability that an iris bulb of this type will bloom. give answer as a fraction in lowest terms. How many bulbs should she plant

    asked by angela
  78. economics

    Determine the sum of money that must be invested today at 9% interest compounded annually to give an investor annuity (annual income) payments of $5,000 per year for 10 years starting 5 years from now.

    asked by sam
  79. world history

    What are some political, economical, and social effects on the Cold War?

    asked by Leah
  80. maths

    a man has one kind of coffee at 'a' paise per kg and another at 'b' paise per kg.how much of each must he take to form a mixture of (a-b)kg, which he can sell at 'c' paise per kg without loss.

    asked by sagar
  81. math

    A sum of RM1,600 is to be distributed among A, B and C. A will get 4 times as much as B and B 3 times as much as C. How much will A get?

    asked by beby
  82. Business

    ). How could benchmarking be effectively used to achieve competitive advantage? Provide an example. 2).What information is gained through managerial accounting? How can a business use this information? As an investor in a small business, what sorts of

    asked by Vickie
  83. math C30

    An isosceles triangle is inscribed in a circle. The shortest side is the base which is 16 cm long. If the radius of the circle is 10 cm, what is the length of side "a"? Put your answer to 1 decimal place into answerblank 1 (no spaces) Answer:

    asked by Jill
  84. math

    What are the x-intercepts for the function f(x) = -x2 - 5x + 6?

    asked by moesha
  85. Physics

    B___A (inclined at 55 degree) /| /\ / | / \ Pull 3900N / |/ D---C | /| | / | |/ | !@#$%^&E | /| | / | |/ | H---G (All is Pin Joint) Distance DC = FE = HG = AB = 2.7m FH = FD = GE = EC = CB = 2 m Find the supporting reaction of H, Member BD (Tension Force),

    asked by Stupid Alex
  86. math

    My tens digit is 2 times your hundreds digit My hundreds digit is 4 My ones digit is a factor of your tens and hundreds digit Who am I?

    asked by Anonymous
  87. math multiply and simplify

    12s^2-9s-4s+3 = 12s^2-6s+3

    asked by Adriana
  88. Math (Algebra)

    little Johnny is skate and wants to go a ramp that is 100 foot drop. His path is determined by the equation:h(t)=-16r^2+60t. How long does it take for him to reach the bottom of the 100 foot drop?

    asked by Tahmina
  89. Math

    Carl hired 4 people to work in his shipping department for a week at 8 hours a day. However, after working only 4 hours on the third day, the work was completed. How many hours of wages does Carl owe to the workers?

    asked by Oliver
  90. chemistry

    what is the difference between a redox rxn in and acidic soln or basic

    asked by chemistt
  91. social studies

    how many books are in dr.suess, yertle the turtle?

    asked by Celest
  92. Art

    Could you please check scientific English in this short dissertation? Thank you, Ms. Sue. 1) Conrad Waddington introduced the term epigenetics in the early 1940s. He defined epigenetics as ‘‘the branch of biology which studies the causal interactions

    asked by Mike
  93. to ms.sue

    i mean how many books did he publish in yertle the turtle.

    asked by Celest
  94. english

    why did tim o'brien mention the snakes in his novel "lake of the woods"?

    asked by fahima
  95. Humanities

    Explain the focus on the idea of natural law as an extension of human nature during the conclusion of the seventeenth century.

    asked by grace
  96. Algebra

    1) The following graphs shows the growth of the median home value in a particular region of the united states starting in 1996. The graphs states in 1996 and shows the trend through the year 2000; therefore x=0 represents the year 1996 and x=4 is 2000.

    asked by Jewel
  97. Algebra

    List the coordinate of any two points on the graph in (x,y)form. The numbers on the horizontal axis are 1,0,2,0,3,0, 4.0 and 5.0 (___,___), (___,____) Find the slope of this line Find the linear equation of this line in slope-intercept form.

    asked by Jewel
  98. Algebra

    14) There are 6 marbles in a bag, 3 blue, 2 red, 1 green. Aubrey reaches into the bag and pulls out a marble, does not replace it, then chooses another. What is the probability that Aubrey chides a blue and then a green marble?

    asked by Sammyjoo
  99. Pre algebra

    How do I solve Quadratic equations by factoring? (for example how would I solve n2 - 10n = -21 if I was supposed to get the answers 7 and 3?

    asked by Grace
  100. physics

    A car starts from rest and travels for 6.3 s with a uniform acceleration of 2.3 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.9 m/s2. If the brakes are applied for 2.6 s, how fast is the car going at the end of the

    asked by j
  101. physics

    idea about the impact of energy field through medicine

    asked by airiz
  102. English 7

    rising action definition

    asked by Laruen
  103. maths

    If n is an odd integer, all of the following are odd EXCEPT (A) n - 2 (B) 2n + n (C) n2 + n (D) (n + 2)2

    asked by beby
  104. maths

    For a certain year, a ski resort averaged d dollars per week in receipts for its 20-week season. If the resort was closed for w weeks during the season because of lack of snow and earned no money during those weeks, how much money did it earn per week, on

    asked by beby
  105. physics

    A motor drives a rope drum of 820 mm diameter, which in turn drags a component of mass 650 kg, 175 m up a slope that makes an angle of 8 degrees to the horizontal. the component starts from rest and uniformly reaches a velocity of 5.3 m/s on completion of

    asked by James
  106. Geology

    What can be done to help society improve its understanding of the world's natural resources and how to utilize them? Why?

    asked by Betty
  107. Art

    Ms. Sue, could you please check this part,too? Thank you 1) He explained why he wrote Gomorrah; he did it for the new generations, seeing kids who dream to be a killer, who see in crime the only way of achievement. Boys and girls without hope. He saw his

    asked by Mike
  108. Art

    Ms. Sue, I need to include these sentences I posted a few days ago to Writeacher. Thank you very much! 1) I'm forwarding you the link to the European Etwinning certificate of quality. 2) Online projects carried out among two or more European schools can be

    asked by Mike
  109. business finance

    Her are the data on $1000 par value bonds issued by Microsoft, Ford, and Xerox at the end of 2008, Assume you are thinking about buying these bonds as of January 2009. Answer the following questions. a. Calculate the values of the bonds if your required

    asked by Chris
  110. English

    What does fantastical mean? My essay topic is compare the fantastical in Poe and lawrence's "the rocking horse"

    asked by Saira
  111. computer SQL

    Consider the universal table D = {P, Q, R, S, T, U, V, W, X, Y, Z} with the following set of functional dependencies: {P, R} -> {Q, T, U} {T} -> {S} {V, W} > {X, Z} {X} -> {Y} What is the primary key for D? Decompose D into 2NF tables. Decompose D into 3NF

    asked by ken
  112. Math

    Solve for x. .006x^3=8889 x = approx 114, but I don't understand how to get that answer. Can anyone help me solve? Thank you!

    asked by Francesca
  113. child development

    the curricular approach which encourages children to explore, experiment, and discover is

    asked by shajuan
  114. math algebra

    multiply and simplify (4-z)z =4z-zsquare? can you please let me know if I am correct

    asked by Adriana
  115. english 125

    identify at least one major similarity and one major difference between the forms of the short story and the poem.

    asked by deedee
  116. Algebra Divide

    x^8+x^5/x Please help im stuck

    asked by Adriana
  117. chemistrry

    what is the Q of a rxn?

    asked by chemist
  118. Art

    Ms Sue, could you please help me express the following ideas? Thank you. 1) Have you thought of a possible common theme? Of course we'll have to wait till September because the school year is about to end. Actually, it ends next Wednesday. 2) If my mother

    asked by Mike
  119. chemisttry

    what is the significance of delta H,S,G in thermodynamics

    asked by chemist
  120. Chemistry.

    Is this formula (Fe2O3) iron oxide?

    asked by Jeconiah
  121. Chemistry. Please help quick!!!

    Is this chemical formula (Fe2O3) iron oxide?

    asked by Jeconiah