Questions Asked on
July 1, 2010

  1. Chemistry

    Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d) one zinc atom for every

    asked by Melissa
  2. Chemistry

    An antacid tablet weighing 1.462 grams was dissolbed in 25mL of 0.8M HCl and diluted with water. The excess HCl was titrated with 3.5 mL of 1.019M NaOH solution. 1. Calculate the number of millimoles added to the tablet 2. Calculate the number of

    asked by Daria
  3. maths

    if cot theta =7/8 , evaluate (1+sin^2theta)(1-sin^2theta)/(1+cost^2theta)(1+co-^2theta) the answer should be 49/64 but i couldn't get that answer. can any one help?

    asked by rani
  4. algebra

    find the last digit in 3^9999.

    asked by Branden
  5. phoenix

    o Is it difficult to accurately measure prejudice? Why or why not?

    asked by isha nix
  6. Finance 200

    The Landis Corporation had 2008 sales of $100 million. The balance sheet items that vary directly with sales and the profit margin are as follows: Cash, 5%. Accounts receivable, 15. Inventory, 25. Net fixed assets, 40. Accounts payable, 15. Accruals, 10.

    asked by Hollie
  7. Chemistry I

    For the methanol combustion reaction 2CH3OH(â„“) + 3O2(g) ----> 2CO2(g) + 4H2O(g) estimate the amount of P [change]V work done and tell whether the work was done on or by the system. Assume a temperature of 27â—¦C. 1. 2.5 kJ, work done by the

    asked by Anonymous
  8. american government

    A conservative is opposed to government intervention in: a)both the economic and social sphere b)the economic sphere,but not the social sphere c)the social sphere,but not the economic sphere d)neither the social nor the economic spheres IS b correct

    asked by vedrana
  9. physics electricity and magnetism

    We are told that the magnitude of the negative charge on the electron is exactly equal to the magnitude of the postive charge on the proton. But is it? Suppose that these magnitudes differ from each other by 0.000040 %. Each copper coin contains 3 X 1022

    asked by naveel
  10. math

    A 1 1/2-pound piece of turkey costs $7.98. A 6-ounce package of the same sliced turkey costs $2.49. What is the difference in price per 3-ounce serving? 2)Jim earns $44,700 annually and pays 11-1/4% for state and local taxes. How much tax does he pay

    asked by angelika
  11. Math

    How can i factor 27a^2 - 75b^2

    asked by Adeola
  12. Chemistry

    Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d) one zinc atom for every

    asked by Melissa
  13. economics

    Assume Cliff and Paul were both producing wheat and corn, and each person was dividing his time equally between the two. Then each decides to specialize in the product in which he has a comparative advantage. Furthermore, they agree to trade 3 bushels of

    asked by sungyeon
  14. Physics

    Fairgoers ride a Ferris wheel with a radius of 5.00 {\rm m} . The wheel completes one revolution every 31.5 s What is the average speed of a rider on this Ferris wheel? If a rider accidentally drops a stuffed animal at the top of the wheel, where does it

    asked by Todd
  15. physics

    The two masses in the Atwood's machine shown in the figure are initially at rest at the same height. After they are released, the large mass, , falls through a height and hits the floor, and the small mass, , rises through a height . Find the speed of the

    asked by meera
  16. physics

    Two blocks are connected by a very light string passing over a massless and frictionless pulley (the figure ). Traveling at constant speed, the 20.0- block moves 70.0 to the right and the 12.0- block moves 70.0 downward.During this process, how much work

    asked by john
  17. english

    I have to edit the following sentences to untangle mixed constructions. Here is the list of five and my corrections below them. 1. Early diagnosis of prostate cancer is often curable. 2. Depending on our method of travel and our destination determines how

    asked by Roger
  18. Calculus

    Diffentiate the function F(x)=(1/2x)^5 My answer is 5/2x^4. The book says 5/32x^4. what am I doing wrong?

    asked by Eileen
  19. algebra

    How is doing operations—adding, subtracting, multiplying, and dividing—with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another

    asked by Anonymous
  20. Physics

    The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n=1 labels the lowest or “ground” state, n=3 is the third state, and so on. If the atom’s diameter is

    asked by Richard
  21. English

    I still have a last question: In the reading comprehension the sentence is " When we went to complain to the travel agency, as a compensation for all the incovenience we had been caused, they offered us a weekend for two in Rome organized by the same tour

    asked by Franco
  22. geometry

    True or false? a!(b!c!) = (a!b!)c! I think its true...?

    asked by Jenny
  23. physics

    A runner dashes from the starting line (x = 0) to a point 80 m away and then turns around and runs to a point 39 m away from the starting point in 23 seconds.What is the runner's average velocity in the previous problem?

    asked by Anonymous
  24. physics

    carts of a roller coaster are travelling 5m/s over the top of the first hill. If there is no energy loss due to friction and the hill is 50m high,what speed will the carts have at the bottom

    asked by seth
  25. american government

    Campaign spending tends to be greatly more important: a)for Republican candidates b)for Democratic candidates c)for candidates in urban areas than candidates in rural areas d)for challengers and non-incumbents rather than incumbents IS d CORRECT

    asked by vedrana
  26. managerial economics

    Suppose that the demand curve for beans is given by: Q=20-P Where Q is thousands of pounds of beans bought per week and P is the price in dollars per pounds a. How many beans will be bought at P=0 b. At what price does the quantity demanded of beans become

    asked by Mishal Almandhour
  27. college

    If a man leans over a cliff and throws a rock upward at 4.9 m/s. Neglecting air resistance, what is the rock's speed one second later?

    asked by Gwen
  28. managerial economics

    Explain the relationship between product X, product Y and product Z or the properties of each according to the following statements a. Cross price elasticity between X and Y is -4 b. Cross price elasticity between X and Y is 12 c. Cross price elasticity

    asked by Mishal Almandhour
  29. social studies

    For children who are learning English as a second language. context-embedded activities enhance?

    asked by D
  30. English

    1. I'd better get going. (What is the meaning of 'get going'? What other expressions can we use?)

    asked by rfvv
  31. managerial economics

    Explain how the following events might affect the market demand curve for prime filet mignon a. A fall in price of filet mignon because of decline in cattle prices b. A general rise in consumer's income c. A rise in the price of lobster d. Increased health

    asked by Mishal Almandhour
  32. managerial economics

    1. Calculate the demand elasticity of demand ( by using at least two methods) given the following information: P1 = 10 Q1=100 P2 = 15 Q2 = 20 Is the product elastic or inelastic?

    asked by Mishal Almandhour
  33. managerial economics

    2. Decide whether the following product is normal, inferior, or luxury. Explain how you can find that? a. Income increases by 20% and quantity decreases by 30% b. Income decreases by 20% and quantity decreases by 30 % c. Income decreases by 20% and

    asked by Mishal Almandhour
  34. Calculus

    Differentiate the function f(t)=1/4(t^4+8). My answer wa 4t^3. The book says t^3. What am I doing wrong,

    asked by Eileen
  35. alg

    Solve: 2 / x - 1 - 3/4 = 5 / x - 1 a) -2 b) 2 c) 3 d) -3

    asked by sean
  36. US History II

    Would anyone consider the inauguration of a president a movement, trend, or activities in economics?

    asked by Amy~
  37. college algebra

    how to solve this problem. Completing the square. Find the value of a such that u^2-8u+a is a perfect square

    asked by CJ
  38. college Algebra

    Diameter of a circle.If the diameter of a circle is 1.3x10^-12 meters,then what is it's radius?

    asked by Lisa
  39. Physics

    An electromagnetic wave has an electric field strength of 145 V/m at a point P in space at time t. A parallel-plate capacitor whose plates have area 0.109 m2 has a uniform electric field between its plates with the same energy density as the answer to part

    asked by Drew
  40. Business

    Discuss the law of supply and demand. Do people follow this law? Why or why not? Provide specific examples. How are the prices set for the goods and services people consume? What control, if any, do you have as a consumer?

    asked by Anonymous
  41. Math

    (root2 + root3)^2 simplify

    asked by Adeola
  42. physics

    two equally charged plates with finite length l is positioned side by side (parallel) and separated by distance d. what is the electric field intensity between the plates?

    asked by alex
  43. algebra 1

    how do you solve the following questions using the substitution method? -3x-y=3 3x+6y=48 -3x-5y=-21 -5x+6y=32 2x+4y=12 4x+16y=8

    asked by no one needs to know
  44. Statistics

    Why is it useful to know about the shape of set of numbers?

    asked by Anonymous
  45. physics

    carts of a roller coaster are travelling 5m/s over the top of the first hill. If there is no energy loss due to friction and the hill is 50m high,what speed will the carts have at the bottom

    asked by seth
  46. English

    Obviously, the police will use force if you do not cooperate. Is this grammatically correct? I need to write a sentence to show how a comma should be used after introductory words or groups of words.

    asked by Molly
  47. grammar

    The informant, who will not be named, called in a tip last night informing police officers about an attempted robbery. The cold, dry, and ruthless wind lashed at their bare hands and faces. Are these sentences grammatically correct?

    asked by Kristin
  48. Physics

    Describe alpha, beta, and gamma rays. What exactly is each ray composed of? What are their characteristic radiation characteristics?

    asked by Richard
  49. Websites for Third Grade

    Can you give me some websites to study for 3rd grade is these areas? Social Studies,English Language Arts, Math,Science

    asked by ☻ Vanessa Sarafina ☻
  50. Math

    125489709/31472=?

    asked by ☻ Vanessa Sarafina ☻
  51. Prezident

    Who was the 1st president America,how long?

    asked by Zinat Ashwira
  52. Math

    Find all integer roots of f(x). Identify any double roots. f(x) = 2x4 + 11x3 + 13x2 - 11x - 15

    asked by Taylor
  53. Math

    Find all integer roots of f(x). Identify any double roots. f(x) = 3x4 - 16x3 + 31x2 - 26x + 8

    asked by Taylor
  54. English

    Classes have also started at music school now. I go twice a week for piano. I'm continuing my tennis lessons. Oh yes, I've been moved up to the "older" group in tennis. Wednesdays I go to Auntie Mike's for English lessons. Tuesdays I have choir practice.

    asked by rfvv
  55. Nice???

    w w w . a r t i s t s h e l p i n g c h i l d r e n . o r g / k i d s c r a f t s a c t i v i t i e s b l o g / 2 0 0 9 / 0 6 / t h e - h a n d b a g - a d d i c t i o n - s t a r t s - e a r l y - w i t h - a - f e l t - p u r s e /

    asked by ☻ Vanessa Sarafina ☻
  56. Math (Algebra)

    I do not understand the following question or what to do to figure out the answer. Can anyone help explain this to me? Thank you. Describe what the graph of interval [-4,10] looks like?

    asked by Lynn
  57. grammar

    Can someone please check the errors I have noted and let me know if they see more? I am supposed to find 20 errors but can only find 15!! Please help. The correction is in parentheses. Why are great numbers of students choosing to pursue their college

    asked by Lily
  58. gometry

    [3.05] In, angle C is (7x - 3) degrees and segment AB = (3x + 12)mm. Part a. What value of x would make equilateral? Part b. What is the perimeter or sum of the lengths of the sides of the equilateral triangle? Be sure to include the unit of measure in

    asked by nina
  59. american government

    Ideological groups are distinct from single issue groups in a. the number of issues with which they are concerned. b. the intensity of their members’ opinions. c. their tendency to get involved in election campaigns. d. that members do not seek to

    asked by vedrana
  60. physics

    A 1.9- block slides down a frictionless ramp, as shown in the figure. The top of the ramp is = 2.1 above the ground; the bottom of the ramp is = 0.40 above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance away.

    asked by meera
  61. college Chemistry

    what is the amount of heat lost in KJ for 50 ml of water going from 70.0 degrees C to 1.0 degrees?

    asked by DD
  62. MATH HELP!!!

    Given a right triangle with a side of length 4 and a hypotenuse of length 7, find the measure of the two acute angles. (Round to the nearest hundredth.)

    asked by Taylor
  63. chemistry

    How to Convert 1 ton Of Steam (Pressure 24Kg/cm2) and ( Temperature 320 C) to K Mol?

    asked by Ahmed AL-Boaimi
  64. teaching

    can someone start me off or tell me how to start a narrative form of code of ethics. thanks in advance and happy holiday weekend.

    asked by crystal
  65. AED 201

    What steps are necessary to get you to your goals? What obstacles might you foresee and how will you overcome them? o What is one principle from the INTASC that you feel you must improve the most to be effective in the education profession? What existing

    asked by Anonymous
  66. Geometry

    B is the midpoint of Symbol for segment A C. . AB=5x+2 AC=12x-2 What is the value of BC? Show your work for credit. Line segment A C with point B on it.

    asked by Ash
  67. Public High School AP Biology

    I got a question that comes from the 1990 released test #61 that I'm completley lost on 61. In a population that is in Hardy-Weinberg equilibrium, the frequency of a recessive allele for a certain hereditary trait is 0.20. What percentage of the

    asked by Kate
  68. xacc 280

    If there has been anyone that has taken this class could get a little help. I am not looking for the answers just some more info. I am not understanding it. Instructions For each of the three situations, say if the accounting method used is correct or

    asked by Tracie
  69. English

    Can you please tell me if I can include these questions (as they are) in a reading comprehension? Was the hotel in Mexico City as they expected it to be? How long was the flight delayed the day they left? What did the travel agency offer them a

    asked by Franco
  70. physics

    consider a solid metal ball with radius r and charge q. what is the electric field intensity at the center, anywhere inside the ball and anywhere outside the ball?

    asked by alex
  71. Physics

    A certain freely failing object requires 1.70 s to travel the last 20.5 m before it hits the ground. From what height above the ground did it fall?

    asked by AMY
  72. Grammar

    This sentence: Without fully understanding the company's objectives. Should I use understand or understanding?

    asked by Anonymous
  73. chem 121

    how many grams of mgcl2 are contained in 255 ml of a 0.650M solutuin

    asked by ngugi
  74. math

    for a strict triangular form, does it has to be in I matrice or just the main diagonal entries are all 1]\

    asked by eng
  75. cpu

    lim x infnitive (4x-1/2x+9)

    asked by ABC
  76. Chemistry

    Hello, we recently did a lab in our chemistry class to analyze an Unknown amount Calcium Carbonate which was titrated with EDTA. Our titration results were: mass of the unknown CaCO3 was 0.172 g and the mL of EDTA added was 30.7. How do I find the percent

    asked by Anna
  77. Chemistry

    How many calories would be required to raise the temperature of 25.0 g of lead by 55.0 degree Celcius?

    asked by CMR
  78. English

    Can you tell me if it is correct to divide the two sentences this way? We really liked those places. Unfortunately, we didn't have any guide with us even if our brochure clearly said that an experienced guide would have accompanied us throughout our tour.

    asked by Franco
  79. English

    I really need to know if these sentences are OK. Thank youin advance. 1)What did the tour include? It included flights, full board accommodation and guided tours. 2)How long was the plane delayed the day they left? It was delayed till the next day. 3)Was

    asked by Franco
  80. accounting

    On January 2, 2006, Grant Corporation leases an asset to Pippin Corporation under the following conditions: 1. Annual lease payments of $10,000 for twenty years. 2. At the end of the lease term the asset is expected to have a value of $2,750. 3. The fair

    asked by LILIANA
  81. Calculus

    Find those values of x at which the tangent line is horizontal to the curve y=xsqrt2-2cosx

    asked by Eileen
  82. science

    An irregularly shaped object has a mass of 67.5 If it is places into a graduated cylinder containing 50.0 ml water and the water level rises to 75.0 ml,what is the density of the object?

    asked by Anonymous
  83. English

    Thank you very much for your correction. Can you tell if this sentence is possible? 1) We really liked those places but unfortunately we didn't have any guide with us even if our brochure clearly said that an an experiences guide would have accompanied us.

    asked by Franco
  84. earth and sun

    express the distance of the earth from the sun using exponential notation

    asked by grade 5 student
  85. Calculus

    differentiate the function R(x)=sqrt(10)/x^7

    asked by Eileen
  86. grammar

    Could you please check the grammar in these sentences? Thanks. It was clearly her, right from the start. These are they, if I'm not mistaken. It always appeared to be them whenever there was trouble. The penalty against them brought coach Henson and I

    asked by Jake
  87. Math

    Use the following table of values to estimate the area under the graph of f(x) over [0, 1] by computing the average of R5 and L5. Table: x: 0 0.2 0.4 0.6 0.8 1 f(x): 51 48 46 43 41 38 I need help with this problem.

    asked by Jason
  88. alg

    In a permutation a) the selections are independent b) some items will never be used c) the order matters d) there must be at least 3 things to choose from

    asked by sean
  89. Math

    Find the general antiderivative of f (x) and check your answer by differentiating. f(x) = x^5 + 9 Need Help.

    asked by Jason
  90. MATH

    Evaluate the indefinite integral. (Use theta for ƒÆ.) ç(8ƒÆ + cos(7ƒÆ))dƒÆ Ans: blank + C C is constant. How do I evaluate it?

    asked by Jason
  91. government

    yellow journalism, explain how the media may or may not influence American foreign policy? Basically, what affect can the media have on the government’s decisions?

    asked by Amanda
  92. chemistry

    assuming the density of a 5% acetic acid solution is 1.0 g/mL, determine the volume of the acetic acid solution necessary to neutralize 25.0mL of 0.10 M Na)H. Also record this calculation on your Report Sheet.

    asked by Thaddeus
  93. Anatomy 2

    In reference to high blood pressure-as a result in changes in the PNS and the SNS list two effects on the heart and one on blood vessels.

    asked by tina
  94. Statistics

    The values 2.0, 3.7, 4.9, 5.0, 5.7, 6.7, 8.5, and 9.0 What is the median? 5.7 what is the mean?5.4 What is the mode?0 What is the range? But I am not sure how to find it????

    asked by Anonymous
  95. Statistics

    In a Gallup poll of 1038 adults, 540 said that second-hand smoke is very harmful. What is the percentage of adults who said second-hand smoke is very harmful? I am not to sure how to find the anwser???

    asked by Anonymous
  96. Statistics

    Why is it useful to know something about shapes of a set of numbers?

    asked by Anonymous
  97. Statistics

    What is use to measure central tendency in healthcare?

    asked by Anonymous
  98. Geometry

    The side of a square measures 3 cm. What is its area?

    asked by bob
  99. Math

    Why is it useful to know about the shape of set of numbers?

    asked by Anonymous