Questions Asked on
June 26, 2011

  1. physics

    A 2 kg particle has a velocity of (2i-3j) m/s and a 3kg particle has a velocity of (1i+6j)m/s.Find (a) the velocity of the center of mass(b) the total momentum of the system

    asked by TIshatilova
  2. Linear programming

    Riverside Oil Company in eastern Kentucky produces regular and supreme gasoline. Each barrel of regular sells for $21 and must have an octane rating of at least 90. Each barrel of supreme sells for $25 and must have an octane rating of at least 97. Each of

    asked by Derek
  3. Algebra 1

    Substitution x - 5y=10 2x - 10y=20

    asked by Kalleigh
  4. chemistry

    150 ml M/10 Ba(MnO4)2 in acidic medium can oxidise what?

    asked by Mayank
  5. physics

    A large fish hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of 2.85m/s^2 and the balance reads 60.0N , what is the true weight of the fish? Under what circumstances will the balance read 39.0N

    asked by Anonymous
  6. spanish

    anoche / mi esposa y yo / saber / que / Carlos y Eva / divorciarse, what would be the correct way to write this sentence using the correct preterit form. Thanks

    asked by Anonymous
  7. physics

    A 3 kg toy car with a speed of 10 m/s collides head-on with a 2 kg car traveling in the opposite direction with a speed of 3 m/s. If the cars are locked together after the collision with a speed of 4.80 m/s, how much kinetic energy is lost?

    asked by Brittany
  8. chemistry

    why does it take more NaOH to neutralize H2SO4 than in HCl

    asked by Anonymous
  9. Math Concentration

    Joe has a ring weighing 10 grams made of an alloy of 13% silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 69%. How many grams of silver should he add? My set up is: 10 (.13 + .87) = 10 (.13 + X

    asked by missy
  10. Physics

    At what speed would a 1140-kg car have the same momentum as a 12,600-kg truck traveling at 25 km/hr? The hint given to this problem is that I need to find the velocity of the car and truck. Converting 25 km/hr to m/s I get 6.944 m/s as the initial

    asked by Casey
  11. science

    What do you think the maximum and optimum carrying capacities for humans are? Why is this a more complex question for humans than it might be for other species? Why is designing experiments in human demography difficult?

    asked by tamika
  12. math

    The pyramid of Giza in Egypt is built of stone and was completed in 2560 BC. The length of each side of the square base is 230 meters and the vertical height is 146 meters. 1. What volume of stone is needed to form a solid pyramid with these dimensions?

    asked by colton
  13. Algebra 1

    Find all values of k so each trinomial can be factored using integers. 3s^2 +ks - 14

    asked by Isabella
  14. Physics

    1. A 0.75kg ball traveling horizontally to the right at 20m/s. A player strikes the ball and causes it to move in the opposite direction with a velocity of 24m/s. a. What impulse was delivered by the player to the ball? b. If this took 0.3 seconds to

    asked by Tina
  15. Chemistry

    How many Silver Coins (weighing 26g each) would it take to provide 5 moles of Silver (Ag)?

    asked by Michelle
  16. chemistry

    10.3 gm NaBr is solved in 50 ml of water. What will be the molality of solution?

    asked by samarth
  17. English

    Can you check this question and answer?(I need to shorten the answer: points 2-3) 1) Describe the kind of technique adopted by writers (at the beginning of the 20th century OR by early 20th century writers) to represent the unspoken activity of the mind.

    asked by Henry2
  18. Intermediate Algebra

    for the following equation, state the value of the discriminate and then describe the nature of the solutions, from the following statements. -20x^2-5x+3=0

    asked by Jennifer
  19. science207

    1. Many poor tropical countries point out that a hectare of shrimp ponds can provide 1,000 times as much annual income as the same area in an intact mangrove forest. Debate this point with a friend or classmate. What are the arguments for and against

    asked by tamika
  20. Chemistry

    A buffer solution is prepared by dissolving 0.400 mol of CH3COOH and 0.200 mol of CH3COONa in 1.00 L of water. 1.00 mL of 10.0 M HCl is added to a 100 mL portion of this solution. What is the final pH of the resulting solution? Ka of CH3COOH = 1.8 x 10¯5

    asked by Sandy
  21. spanish

    Anoche mi esposa y yo supimos que Carlos y Eva van a divorciarse. what is the correct preterit of the verbs and put them into the sentence.

    asked by Anonymous
  22. Statistics

    Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Student's grades - A, B, or C, on a test.

    asked by Jonathan
  23. Chemistry

    A solution is prepared by diluting 65.0 mL of 0.175 M methylamine, CH3NH2, to a total volume of 225 mL. Calculate the pH of the diluted solution. Kb (CH3NH2) = 4.40 x 10-4

    asked by Mallory
  24. Physics

    1. A 0.200kg ball moves with a velocity of 0.3m/s. It collides with a second ball that is at rest and has a mass of 0.1kg. After the collision, the velocity of 0.1kg ball is 0.26m/s. What is the new velocity of the first ball. Please indicate which

    asked by Carol
  25. English

    I urgently need you to chech the question and the answer to it. I considered your corrections. 1) Explain the meaning of the word compromise applied to the Victorian way of life. (Explain how the word compromise applied to the Victorian way of life). Then

    asked by Henry2
  26. chemistry

    If the mass od one neutron is 1.00866 amu, the mass of one proton is 1.00728 amu, and the mass of 12C nucleus is 11.99671 amu, calculate the binding energy for the 12C nucleus. A-1.10x10^18 kJ/mol B-8.90x10^9 C-1.10x10^15 D-8.90x10^12 I keep getting

    asked by mali
  27. English

    I forgot to include these statements about a letter of inquiry to a hotel. Which connectors shall I use to include my queries to the hotel? Thank you. 4) I'd like to know the following things: First, if the bus line in front of the hotel goes directly to

    asked by Henry2
  28. physics

    There is a block on top of an incline plane. The incline is going down to the right. The angle to the right of the 90 is 36.9 degree. There is a force pushing on it from the left. Find the applied force (F) needed to prevent the block from sliding down the

    asked by k9
  29. Math

    I have a Final Exam in Math tomorrow, and as I was going over my notes, I saw a question like this: Simplify 6(3-4)-7(-2) How do you simplfy integers when doing order of operations? I cannot quite remember this.

    asked by Erika
  30. physics

    What current flows when a 40 v potential difference is imposed across a 1.8 kÙ resistor?

    asked by Debra
  31. Chemistry

    A buffer solution is prepared by dissolving 0.400 mol of CH3COOH and 0.200 mol of CH3COONa in 1.00 L of water. 1.00 mL of 10.0 M HCl is added to a 100 mL portion of this solution. What is the final pH of the resulting solution? Ka of CH3COOH = 1.8 x 10¯5

    asked by Kendra
  32. social studies

    The task of economic policy is to create a prosperous America. The unfinished task of prosperous Americans is to build a Great Society. Our accomplishments have been many; these tasks remain unfinished:

    asked by Anonymous
  33. Math

    Luis is 10 years older than his brother. Next year, he will be three times as old as his brother. If the brother's age is represented by a, what is Luis' age? What will be the brother's age next year?

    asked by Brittany
  34. History

    All of the following inclined the US toward entering on the side of the Allies in WWI EXCEPT? although some progressives opposed war, the idealistic progressive spirit pointed toward an American campaign to end militarism and establish a peaceful world

    asked by Kristina
  35. Algebra 1

    Evaluate. Express each result in scientific and standard notation. (4 x 10^2)(15 x 10^-6)

    asked by Bella
  36. Biology

    Good day! I actually just have one question and I have been looking at links and everything, but i still don't understand>>>>... "What abiotic factors seem to be the greatest determinants of terrestrial biome locations?"

    asked by Sam
  37. child care management mod 4

    Teachers in child care centers should meet which of the following educational qualifications? A. High school graduate B. High school graduate with some college course work in child development or early childhood education C. Two to four years of college

    asked by jj
  38. English

    Just to be sure that everything is OK. 1) Explain the meaning of the word compromise (written in italics) applied to the Victorian way of life. Then outline briefly the main features of Victorian society. 2) I'm e-mailing to you (I'm sending you this

    asked by Henry2
  39. Algebra 1

    Two musical notes played at the same time produce harmony. The closest harmony is produced by frequencies with the greatest GCF. A,C,and C sharp have frequencies of 220,264,and 275, respectively. Which pair of these notes produces the closest harmony?

    asked by Isabella
  40. Math Statistics

    Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Student's grades - A, B, or C, on a test.

    asked by Phillip
  41. chemistry

    If 10 calories of heat are added to two grams of liquid water what is the temperature of the water

    asked by joe
  42. Algebra 1

    Arrange the terms of -3x+4x^5 - 2x^3 so that the powers of x are in ascending order.

    asked by Bella
  43. physics

    A box is raised using a rope with a acceleration of 3.9m/s(upward)tesnsion of the rope 57N mass of box in kg?

    asked by Mary
  44. CHEMISTRY

    The concentration and volume of reagents combined in each trial are listed in the table below: Trial 00020 M 00020 M H2O(mL) Fe(NO3)3 (mL) KSCN (mL) 1 5 2 3 2 5 3 2 3 5 4 1 4 5 5 0 Initially (right after combining and before any reaction occurs) the

    asked by AMY
  45. English

    A last doubt. Which of the following sentences is best formulated? Which are grammatically wrong? Could you check the last 2 points, too? 1) The flowers are presented not as statically as in a painting, but as alive with motion. 2) The flowers are

    asked by Henry2
  46. math

    Let U = {5, 10, 15, 20, 25, 30, 35, 40} A = {5, 10, 15, 20} B = {25, 30, 35, 40} C = {10, 20, 30, 40}. Find A ⋂ C.

    asked by Anonymous
  47. calculus

    A stone is dropped from a height of 144 feet. a. When will the stone hit the ground? b. With what velocity does it hit the ground?

    asked by Carly
  48. Statistics

    The mean of a data set is 23 and 12.6. The z-score is -1.30. What is the standard deviation?

    asked by Shelle
  49. math

    Find the median and the mean for the data set below. 5.4 2.0 6.8 3.1 2.9 4.7 2.1 5.0 1.9 3.4

    asked by Anonymous
  50. composition and communication 1

    Indiviuals can be denied credit for a number of reasons, Individuals who are near limit on existing cards, have to much outstandind debt or too many accounts overall, have a history of a late payments, charge off or bankruptucy are likely to be denied

    asked by carrie
  51. chemistry

    A radioisotope has a neutron/proton ratio which is too low. Which of the following processes will not occur for such a nucleus?

    asked by mali
  52. principles of marketing

    Once you have developed your product/service, you then need to determine how to make it available to the end user. Using your textbook and the articles from the Databases in the AIU Library, develop a distribution system for the product/service you chose

    asked by Hector
  53. Algebra 1

    The graphs of 3x+2y=1, y=2, and 3x-4y=-29 contain the sides of a triangle. Find the measure of the area of the triangle.

    asked by Sam
  54. English

    I need you to check the question and my answer to it. Shall I include more details in the question? In sentences 3 and 5 I don't know which connectors to use (to express a contrast between two different concepts). How can't find a suitable verb to finish

    asked by Henry2
  55. math

    if two sides of triangle are 15 and 25 cm respectively,what is the range of values of the third side?

    asked by judy ann
  56. math

    The equation y = -1777x + 27,153 can be used to predict the number y of gun deaths in the United States. X years after 2000, that is, x = 0 corresponds to 2000, x = 3 corresponds to 2003, x = 6 corresponds to 2006, and so on. Predict the number of gun

    asked by tee
  57. fin 200

    I need help with the Comprehensive Problem: Adams Corporation on p. 119 (chapter 4)

    asked by Happy
  58. computer science

    is it true or false A fixed length hash value of 128 bits is less collision resistant than a fixed length hash value of 512 bits

    asked by Roger
  59. Physics

    A cart of apples is rolling toward you in the street. It’s velocity is 2m/s. Its total mass is 50kg. You are running toward the cart of apples (hint your velocity is opposite direction of the carts velocity). You have a mass of 45kg. What velocity must

    asked by Tina
  60. overton high

    two crates weigh 9kg and 14kg with a force of 195 newtons. what is the acceleratio?

    asked by mike
  61. geometry

    Find the area of the parallelogram that has coordinates of A(-2,2), B(-4,-2), C(2,-2), and D(4,2). Find the base and height first.

    asked by Cassandra
  62. accounting

    You trade equipment in 2010 and pay a $10,000 cash boot for similar equipment with a fair market value of $20,000. The transaction cost is $100. You paid $25,000 for your old equipment. The depreciation deduction allowed for tax purposes on the old

    asked by janai preister
  63. Calculus

    find the rate of change dy/dx for y=x(1-x); x=-1

    asked by Lee
  64. chemistry

    A NASA satellite showed that in 2003 the ozone hole was much larger than it was in 2002. The 2003 hole measured 1.04 x 107 mi2 in diameter, while the diameter of the 2002 hole was 6.9 x 106 mi2 Calculate the difference in size between the two holes in

    asked by roy
  65. Statistics

    Can someone please give specific examples of how psychologists use statistics

    asked by Carla
  66. science207

    Many ecologists and resource scientists work for government agencies to study resources and resource management. Do these scientists serve the public best if they try to do pure science, or if they try to support the political positions of democratically

    asked by tamika
  67. Trigonometry

    I need help proving the following identity: 4(sin^6(x)+cos^6(x)) = 4-3sin^2(2x) I am completely lost, if anybody can please give me a step-by-step guide to figuring this out, I would be forever grateful!!

    asked by Rick
  68. science207

    1. Suppose that you were head of a family planning agency in India. How would you design a scientific study to determine the effectiveness of different approaches to population stabilization? How would you account for factors such as culture, religion,

    asked by tamika
  69. English

    Provide at least two specific examples of changes you have implemented based on what you learned this week. What would be two examples of this? Thank You!

    asked by Sharron
  70. CHEMISTRY

    The concentration and volume of reagents combined in each trial are listed in the table below: Trial 00020 M 00020 M H2O(mL) Fe(NO3)3 (mL) KSCN (mL) 1 5 2 3 2 5 3 2 3 5 4 1 4 5 5 0 Initially (right after combining and before any reaction occurs) the

    asked by AMY
  71. math

    Let U = {5, 10, 15, 20, 25, 30, 35, 40} A = {5, 10, 15, 20} B = {25, 30, 35, 40} C = {10, 20, 30, 40}. Find A ⋂ C.

    asked by Anonymous
  72. algebra

    solve square root of 72x to 3 power divided by 8x

    asked by scott
  73. medical office asistant

    does anyone have a sample of a penn foster discharge summary

    asked by Anonymous
  74. English

    1) Why do you say I'm writing to you to find out about hotel accommodation BUT I'm e-mailing you to find out ... thank you I'm passionate about photography is that same as I'm fond of photography?

    asked by Henry2
  75. chemistry

    how much heat energy would it take change the temperature of 50 mL of water from 23 C to 28 C?

    asked by S
  76. Algebra 1

    complete. 6t to the 2nd power - 23t + 20=(3t - 4)(2t - .....)

    asked by Brittany
  77. American Govt

    how does the Military support democratic ideals?

    asked by Anonymous
  78. Physics

    Light is both a mechanical wave and a particle.

    asked by Thomas
  79. chemistry

    Calculate the mass defect for the formation of phosphorus-31. The mass of a phosphorus-31 mucleus is 30.973765 amu. The masses of a proton and a neutron are 1.00728 and 1.00866 amu, respectively

    asked by mali
  80. Algebra 1

    Evaluate. Express each result in scientific and standard notation. (4 x 10^2)(15 x 10^-6)

    asked by Isabella
  81. Algebra 1

    There is three times as much water as land on Earth's surface. What percent of earth is covered by water?

    asked by Isabella
  82. Algebra 1

    Simplify. Assume that no denominator is equal to zero. (4a^-1)^-2/(2a^4)^2

    asked by Isabella
  83. Algebra 1

    Latoya bought a new dress for $32.86. This included 6% sales tax. What was the cost of the dress before tax?

    asked by Isabella
  84. Algebra 1

    The graphs of 3x+2y=1, y=2, and 3x - 4y=-29 contain the sides of a triangle. Find the measure of the area of the triangle.

    asked by Kalleigh
  85. Physics

    Question: A 0.200kg ball moves with a velocity of 0.3m/s. It collides with a second ball that is at rest and has a mass of 0.1kg. After the collision, the velocity of 0.1kg ball is 0.26m/s. What is the new velocity of the first ball. Please indicate which

    asked by Tina
  86. Statistics

    In an advertisement, a shoe store claims that its mean online delivery time is less than 30 hours. A random selection of 36 delivery times has a sample mean of 28.5 hours and a standard deviation of 3.5 hours.

    asked by Eric
  87. Math

    Find the limit of ( n(n+1)/2 )^2 * 2/n^3 * 2/n as n goes into infinity I keep on getting 1, which is the wrong answer. Please help!

    asked by Kay
  88. Algebra 1

    Solve Each equation. 7(x - 12)=13+5(3x - 4)

    asked by Sam
  89. Algebra 1

    Solve each equation. p(p+2)+3p=p(p - 3)

    asked by Sam
  90. Algebra 1

    solve each equation x(x - 3) - x(x+4)=17x - 23

    asked by Sam
  91. Algebra 1

    Solve each equation. t(t - 12)+t(t+2)+25=2t(t - 5) - 15

    asked by Sam
  92. Algebra 1

    If g(x) = x^2+2x, find g(a - 1)

    asked by Sam
  93. Algebra 1

    Evaluate. (15x)^3 - y if x=0.2 and y=1.3

    asked by Bella
  94. calculus

    differentiate the following funcation: R(t) = (t + e^t)(4- sqrt (t))

    asked by Zoe
  95. calculus

    fin derivative of the function (t+e^t)(4- sqrt t)

    asked by Zoe
  96. Chemistry

    Can you please explain what's a covalent bond and give some examples? would N-N be a covalent bond?

    asked by Anonymous
  97. english

    where will i get the essay in about 500 words on "polluting the environment is dangerous for human existence",prove using present instances

    asked by YASH
  98. english

    from where i will get an essay on the topic "the complete development of students is only possible by strict discipline " write for or against the topic

    asked by YASH
  99. Writing

    Aristotle observed arguments only have two parts: statement and proof. T/F

    asked by Jonathan
  100. Accounting

    If both my trial balance and balance sheet are balanced, my business should breakeven with no gain or loss. But my accountant told me my business has lost $500,000. Could my accountant be right?

    asked by KF
  101. English

    What do you think of this sentence? Thank you. 1) In the indirect interior monologue the narrator comments upon the thoughts of the character and maintains logical and grammatical organization.

    asked by Henry2
  102. physics

    For specific heat and measuring 5 mL of air within a syringe and comparing while submerging in boiling water and ice water and extrapolating back, is your measurement of absolute zero close to the actual value (-273 °C)? How might you change the

    asked by Anonymous
  103. English

    Thank you very much for your help. I tried to correct all the things I made wrong. Can you check my question and answer one more time. 1) Explain then the meaning of the word compromise applied to the Victorian way of life. (Explain how the word compromise

    asked by Henry2
  104. Financial management

    you have won a lottery with two option. A: take 500000 immediately, B: take 40000 at the end of every year 1000000, over a period of 25 years. Required rate of return is 5% Q1. what option would you prefer? Q2. What will be your answer if rate of return is

    asked by SARANYA
  105. math

    set operations A^c = (A complement) B^c = (B complement) A^c intersection B^c intersection C no parenthesis :// do i get the intersection of all three or get the intersection of A^c and B^c first?

    asked by rose
  106. algebra

    In land what is the dollar value of it, at 100% (9x)=11% ?

    asked by ofelia
  107. psy

    6. Professor Klinger says that all of your ideas come from interaction with the environment rather than anything that you were born with. The professor is advocating a theoretical perspective based on a(n) ______________ view. (Points : 1) tabula rasa

    asked by danielle
  108. english

    Like the popular belief that older adults do poorer in schools than their younger counterparts, the midlife crisis

    asked by lily
  109. physica

    what is an example of a lab where you measure conservation of momentum? Please don't give the car example or ball pendulum because those are too difficult to understand.

    asked by Susan
  110. Algebra 1 a

    Need help to solve can anyone help me please 6x-9y = 25.5 7y-2x =-10.0 solve the elimination method

    asked by Manu
  111. Geometry

    I need help with counterexamples and all the questions are false. 1.If an angle measures 34 degrees ,then the angle is acute. 2.If the length of twwo segments are each 17 feet,then the segments are congruent. 3.If two angles 32 and 148 degrees ,then are

    asked by Lauren
  112. chemistry

    If I have 10 silver coins and they weigh 55 grams and displace water from 25 mL to 35 mL, what is the density? What is the specific gravity?

    asked by S
  113. Algebra 1

    Complete. g to the 2nd power - 8g+16=(g - 4)(g....4)

    asked by Brittany
  114. composition and communication 1

    please if anyone can help me on this assignment. That would be so awsome. I have to identify which of the two selected pharagraphs was more effective, focusing on the writing elements rather than the opinions presented

    asked by carrie
  115. Applied Physics

    A year of 365 days is equivalent to 5.26 x 10 to the 5 seconds

    asked by Eric
  116. Physics

    True or False Light is both a mechanical wave and a particle

    asked by Eric
  117. Algebra 1

    Solve. -2/5 > 4z/7

    asked by Isabella
  118. English

    1. The Davinci Code is the most exciting book I've ever read. 2. The Da Vinci Code is the most exciting book I've ever read. (Which title is right? Can we omit 'the'?)

    asked by rfvv
  119. math

    Find the median and the mean for the data set below. 5.4 2.0 6.8 3.1 2.9 4.7 2.1 5.0 1.9 3.4

    asked by h h