# Questions Asked onJune 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

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

3. ## Algebra 1

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

4. ## chemistry

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

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

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

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?

8. ## chemistry

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

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

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

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?

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?

13. ## Algebra 1

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

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

15. ## Chemistry

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

16. ## chemistry

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

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.

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

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

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

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.

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.

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

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

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

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

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

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

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.

30. ## physics

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

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

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:

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?

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

35. ## Algebra 1

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

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?"

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

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

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?

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.

41. ## chemistry

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

42. ## Algebra 1

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

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?

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

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

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.

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?

48. ## Statistics

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

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

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

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?

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

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.

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

55. ## math

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

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

57. ## fin 200

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

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

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

60. ## overton high

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

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.

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

63. ## Calculus

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

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

65. ## Statistics

Can someone please give specific examples of how psychologists use statistics

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

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!!

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,

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!

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

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.

72. ## algebra

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

73. ## medical office asistant

does anyone have a sample of a penn foster discharge summary

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?

75. ## chemistry

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

76. ## Algebra 1

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

77. ## American Govt

how does the Military support democratic ideals?

78. ## Physics

Light is both a mechanical wave and a particle.

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

80. ## Algebra 1

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

81. ## Algebra 1

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

82. ## Algebra 1

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

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?

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.

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

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.

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!

88. ## Algebra 1

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

89. ## Algebra 1

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

90. ## Algebra 1

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

91. ## Algebra 1

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

92. ## Algebra 1

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

93. ## Algebra 1

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

94. ## calculus

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

95. ## calculus

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

96. ## Chemistry

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

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

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

99. ## Writing

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

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?

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.

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

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

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

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?

106. ## algebra

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

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

108. ## english

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

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.

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

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

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?

113. ## Algebra 1

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

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

115. ## Applied Physics

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

116. ## Physics

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

117. ## Algebra 1

Solve. -2/5 > 4z/7