# Questions Asked onNovember 12, 2007

1. ## Physics

This is probably a really easy question, but I just don't know how to set it up. An object in equilibrium has three forces exerted on it. A 33 N force acts at 90 degrees from the x-axis and a 44 N force acts at 60 degrees. What are the magnitude and

2. ## Physics

Europa, a moon of Jupiter has an orbital diameter of 1.34x10^9m and a period of 3.55 days. What is the mass of Jupiter? d=1.34x10^9m T=3.55days = 30672s M=? r=71492000m rm=6.7x10^8 r-total=7414492000m r^3/t^2=GM/4pi^2

3. ## Algebra

you are about to take a test that contain questions of type A worth 4 points and of type B worth 7 points. You must answer at least 5 of type A and 3 of type B, but time restricts answering more than 10 of either type. In total, you can answer no more than

4. ## Physics

A 2.1kg brass ball is transported to the Moon. a)What is the mass of the brass ball on the earth and on the moon? Wouldn't it be 2.1kg for the earth as well as for the moon? b)Determing the weight of thee brass ball on the earth. F_g=(G*m_ball*m_earth)/r^2

5. ## Managerial Economics

Economists consider which of the following costs to be irrelevant to a short run business decision? A)out of pocket B)historical cost C)opportunity cost D)replacement cost

6. ## APUSH

How did nostalgia for the past encourage social reform?

7. ## Managerial Economics

Diseconomies of scale can be caused by: A)bureaucratic inefficiencies B)increasing advertising and promotional costs. C)the law of diminishing returns D)all of the above

8. ## Science

A student finds that it takes 0.20s for a ball to pass through phototogates placed 30 cm apart on a level ramp. The end of the ramp is 92 cm above the floor. Where should a coin be placed so tnat the ball strikes it directly on impact with the ground?

9. ## Physics

A regulation volleyball court is L = 18.0 m long and a regulation volleyball net is d = 2.43 m high. A volleyball player strikes the ball a height h = 1.76 m directly above the back line, and the ball's initial velocity makes an angle q = 55° with respect

10. ## Chemistry

how do you purify Biphenyl contaminated with Fluorene? what is the method and solvent?

11. ## Essay

In what ways were cotton production and slavery more of a burden to the South than a benefit.

12. ## English

Are the "Notes on Punctuation" by Lewis Thomas actually about punctuation? We were asked to "close read" it and I'm sure the author had other messages to get out other than punctuation. I looked Lewis Thomas up on google and found that he was quite into

How do I tell if this is a mean or a proportion 1. Insurance companies track life expectancy information to assist in determining the cost of life insurance policies. The insurance company knows that, last year, the life expectancy of its policyholders was

14. ## Physics

The mean radius of the Earth is R=6.38x10^6m. At what distance above the Earth's surface will the acceleration of gravity be 4.905m/s^2? F_g=(Gmme)/r^2 4.905=6.67x10^-11(5.98x10^24)/r^2 The mass cancel out so that is how I got the above answer. r=9017663m

15. ## Physics

Could someone help me with these questions. . . please 1. How does Rutherford’s model of the atom account for the back – scattering of alpha particles directed at the gold leaf 2. The higher the energy level occupied by an electron in the hydrogen

16. ## chemistry

An aqueous solution of ethanol is 3.05 M in ethanol, CH3CH2OH. Calculate the mole fraction of ethanol if the density of the solution is 0.964 g mL-1.

17. ## Calculus

Minimize S=x+2y with xy=2 and both x and y > 0

18. ## Science

Hi any links or ideas? Given darwins theory of evolution, what scientific evidence best supports evolution by natural selection?

19. ## acct. correction

can someone correct these for me thanks. for the accounting cycle. i have to place these in order. a) Posting the journal entries b) Journalizing and posting adjusting entries c) Preparing the adjusted trial balances d) Journalizing and posting closing

20. ## Algebra

Hello all - I would like to check my work on 2 problems. Solve by factoring : x^2-13x= -12 x^2-13x+12= -12 + 12 x^2-13x+12= 0 (x-1)(x-12)= 0 x = 1 , 12 Solve using the square root property: 2x^2-35=15 2x^2-35-15=0 2x^2-50=0 2(x-5)(x+5)=0 x = 5 , -5 Not

21. ## biology

should companies that market high solute beverages be able to say these drinks quench your thirst what information should consumers be given about the concentration of beverages

22. ## physics

a 15000N car on a hydrolyic lift rests on a cylinder with a piston of radius 0.20M,. if a connecting cylinder with a piston of 0.04M radius is driven by compressed air, what force must be applied to the smaller piston in order to lift the car? am i doing

23. ## Math--Calculus

Let y = f(x) be the continuous function that satisfies the equation x^4 - (5x^2)(y^2) + 4y^4 = 0 and whose graph contains the points (2,1) and (2,2). Let L be the line tangent to the graph of f at x = 2. (a) Find and expression for y'. (b) Write an

24. ## CHEMISTRY

C12H20(Y)--> 22CH2=O+ 2CH3C(=O)CH2C(=O)CH3 The reagents used are ozone, Zn and H20 Give condensed formula of C12H20Y

25. ## Managerial Economics

When a firm increased its output by one unit, its Average Cost rose from \$45 to 50. This implies that its Marginal cost is A)greater than \$50 B)between \$45 and \$50 C)\$5 D)cannot be determined from the above information

26. ## Physics

A regulation volleyball court is L = 18.0 m long and a regulation volleyball net is d = 2.43 m high. A volleyball player strikes the ball a height h = 1.76 m directly above the back line, and the ball's initial velocity makes an angle q = 55° with respect

27. ## Managerial Economics

When a firm increased its output by one unit, its Average Cost decreased. This implies that A)the law of diminishing returns has not yet taken effect B)MC

28. ## Social Studies (Early Native American Tribes)

Can u give me some good places to research the Wobenakiak tribe? I have an essay due tomorrow. thx!

29. ## social studies

where can I find the answers to pigskin geography week#10,2007

30. ## Physics

Suppose that the force acting on a mass m is F=-kx+fsin(omega)t. a.) show that x(t)= A sin omegat is a possible motion for this simple driven oscillator if A= f/k-m omega^2 b.) what is the amplitude when the frequency is very small? I hav no idea where to

31. ## probability

3)If the random variable T is the time to failure of a commercial product and the values of its probability density and distribution function at time "t" are f(t) and F(t), then its failure rate at time t is given by f(t) / 1-F(t) Thus, the failure rate at

32. ## physics

a 15000N car on a hydrolyic lift rests on a cylinder with a piston of radius 0.20M,. if a connecting cylinder with a piston of 0.04M radius is driven by compressed air, what force must be applied to the smaller piston in order to lift the car? am i doing

33. ## math

if a class collects \$155.00 toward a fundraiser goal of \$775.00 what fraction reprisents towards it goal? plz help me with my homework!!!

34. ## Physics

For a box that is twice as wide as it is tall, what is the critical angel for which the box can easily tip over? What is the critical angel for a box that is twice as tall as it is wide? Which box will tip over more easily? Why? I have no idea on where to

35. ## Homework

We, my roomates and I, keep getting replies saying stop posting under more than one name. We are not posting under more than one name we are all different. We all live together and only have this common computer at the moment, but we are more than one

36. ## Chem

NaOH (aq) + Zn (solid) reaction

37. ## computers

which set of terms below correctly pairs a generation of computers with key innovation associated with it? a. 2nd generation/ intergrated circuits b. 3rd generation/programming languages c. 4th generation/ operating systems d. 5th generation/artificial

38. ## accounting

Identify one decision that Nike managers make in each of the six value-chain functions.

39. ## science-measurement

what word has this vocabulary??? displays information in rows and columns it ends with an e but i don't know the word

40. ## Science - Biology - Ecology

I desperately need help on the iron hypothesis and related facts: Where are HNLC waters found and why? (a map would be nice) What is the fate of the organic carbon fixed by photosynthesis in the deep ocean? How does iron enter the ocean eco-system? What is

41. ## math

Find the lateral and surface area of the right rectangular prism whose length is 7 cm, width is 5 cm, and height is 1.5 cm. I think the answer is 36 for lateral area and 106 as surface area. I made a formula, 2(7 x 1.5 + 1.5 x 5)) and I got 36. Then I made

42. ## Chemistry

A 0.00400- mole sample of 2-chloro-2methylpropane is added to 150Ml of water, and the mixture is stirred till the p H levels off. What is the p H of the solution?

43. ## Chemistry

Hi; I'm just wondering, I need to write the dissocation equation for NH3 so that I can get Kb, and I just want to make sure that I am on the write track. I know that when some solids dissociate they just go from say CaCO3 --> CaO + CO2, but for this I'm

44. ## Geography

What is around edges of the Pacific Ocean?

45. ## Preschool Question--Pleae Help!

I asked this question a few days ago- and several tutors said there is no one correct answer. There has to be one answer better,because I can only mark one answer. For many children,the development of their imagination affects the development of: A.

46. ## Physics

You have a mass of 2 kg attached to a spring with a spring constant 18 N/m. The mass is at rest at the equilibrium position. At time t=0 you hit the object with a hammer. This blow instantaneously gives the object a velocity of 3 m/s. The motion (after the

47. ## Math

Please check my answer thanks You bought 4 chairs for \$22.oo each a table for \$212 and an umbrella for \$85 what is the total bill if your sales tax rate is 6% 22x4=88 then add 88 212 + 85 ___________________ 385 x 6% _________________

48. ## Economics

Can you give me a website on the book, The World is Flat? It is such a long book. I cannot remember everything I read.

49. ## World history

Is Ghana and Mali and nearby countries considered central Africa? Since today it is on a modern map..it is located northwest...but back then..was it considered central africa?

50. ## physics

An oscillator has an amplitude of 3.2. At this instant displacement of the oscillator is 1.4. What are the two possible phases of the oscillator at this instant? Work so far: x= Acos (constant) x=displacement A=amplitude so 1.4=3.2 cos (constant)

51. ## biology

Describe the significance of the Law of Segregation and its relationship with cell division.

52. ## spanish Sra JMcGuin

did I miss any of the accents necessary? Melodía lleva un gorro de lana gris y marrón con bolas de algodón. Ella también lleva unas botas altas de cuero marrones con lana suave adentro. Las botas se llaman son UGGS. Ella modela un par de vaqueros

53. ## Social Studies

Name 3 documents and or important people involving the government? For example: as one of the documents, The Articles of Confederation can be one. Can anyone name 2 more at least??? PLZ!

54. ## lit

I have to write a modest proposal similar to Jonathan Swifts. Please tell me if I am on the right tack (if there is changes to be made show me where) It is devastating and heart wrenching to see how the world is slowly transforming into a heat machine and

55. ## Math

please explian this not sure about fractions thanks :) 1/3, 5/6 , and 3/8 = add the fractions reduce to loewst terms

56. ## Geography

What rivers in order will the Dallas Cowboys cross on their way to New York? Mississippi

57. ## Social Studies (World History)

I need to find information particularly on agricultural and pastoral production in central Africa during the time span: 600-1450. If info on this subtheme does not offer a lot of info, we may use the bigger theme which is creation, expansion, and

58. ## Chemisty

Rewrtie and balance the equation: N sub 2 + H sub 2 yeild NH sub 3

59. ## SCI 275

Identify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix C. How did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth trophic

60. ## thomas alva edison

I have a list of people where i have to separate them into scientists and engineers and i have one doubt. is thomas alva edison an engineer or scientist. i know he invented light bulb and phonograph. but i was doing a research and he was known as a

61. ## Social Studies

Explain the significance of rivers in the life of ancient people in Mesopotamia,India and China.

62. ## Chemistery

I just want to know why does a balloon filled with heliam explodes when touched with fire?

63. ## history

how much did mississippi get for the up fron payement in the Tobacco Litigation?

64. ## economics

would US exports decrease because of an appreciated dollar, lower interest rates, or decreased foreign demand for dollars?

65. ## HUM 130

Religion can affect people in many different ways. List at least two effects that organized religion has had on society and give examples from past and/or present world events that illastrate your examples.

unscramble vashert, relcod, redic

67. ## maths

given the following equation for a circle x^2-8x+y^2+4y+11=0 find its centre and radius

68. ## science

I have to design a sustainable city with a river running through it. Would I put both my water treatment plant and seweage plant on the river. Water up and sewer plant downstream?

69. ## English

Discuss the reversal of the positions of Macbeth and lady Macbeth from what they were in Acts 1 and 2.

70. ## Super Easy Science - SUPER SIMPLE QUESTION!!!!!

how do I do i stay focused while writing a report??????!!!!!!!!!!!

71. ## math

Ecostar is a experimental battery operated car. At a top speed of 70 miles per hourr, the only sounds are wind and noise form the tires. The range of the ecostar is about 100 miles between charges. it takes thirty seconds to plug in the car and 20 more

72. ## pigskin geography

Are there more than 3 cities which will be visited by a team from a bordering state? Question 1 week 10 November 11, 2007

73. ## math

please help how do you figure out the simple interest on a \$14,500 loan at 9% interest for 5 years ?

74. ## MATH - SPANISH

Need the two sentences translated, not answered, just translated so that I can help my niece: Hay 70 personas esperando en fila para comprar boletos para un concierto. Cuando se acaban los boletos todavia quedan 31 personas en la fila. ¿Aproximadamente

75. ## World History

I need to cover the most important developments in agricultural and pastoral production in central Africa during the middle ages (600-1450). Also, I can cover the creation, expansion, and interaction of economic systems in place of the subtheme. I'm out of

76. ## computers

Plan a systems development project for the Bead Bar, using the seven standard systems development life cycle phases

77. ## Math

How do I mutliply the following; (4x2+3x-3)(4x2+3x-3)

78. ## World History

I can't find any info in regards to creation, expansion, and interaction of economic systems in central Africa during the time span: 600-1450. I've tried many resources and I can't find any info on agricultural and pastoral production, trade and commerce,

79. ## Calculus

Find the limit. Use L'Hopitals Rule if necessary. lim (x^2+3x+2)/(x^2+x) x -> 0

80. ## Literature

What manifestations of Indian culture are seen in our country?

81. ## Social Studies

How do you promote the contributions of Asia's early civilizations which are beneficisl to modern society?Explain.

82. ## math

Find the surface area of the right rectangular prism. The height is 2 in, the length is 10 in, and the width is 4 in. I think the answer is 136. I made a formula, 2(8 + 20 + 40) and I got 136. Is this right?

83. ## acct. question

my question is what are the steps for the accounting cycle?

84. ## Writing

what are good ways to start off personal statement letters? I have a idea on what i want to write about i just don't know how to start off. like the first two sentence

85. ## SPANISH - MATH

Need the two sentences translated, not answered, just translated: Hay 70 personas esperando en fila para comprar boletos para un concierto. Cuando se acaban los boletos todavia quedan 31 personas en la fila. ¿Aproximadamente cuántas personas consiguieron

86. ## pigskin geography

Are there more than 3 cities which will be visited by a team from a bordering state? Question 1 week 10 November 11, 2007

87. ## Middle School Science

I can't find the definitions for the following science terms anywhere: known sample positive test negative test can anyone help?

88. ## Literature

Why is India called the Land of Prayer?

89. ## spanish Sra JMcGuin

Hi can you help me put in the accent marks on this - I do not know how to do this on my computer - I think this is good. I have to give a presentation on it tommorrow. Melodía lleva un gorro de lana gris y marrón con bolas de algodón. Ella también

90. ## Math/ Computers

Posted by Ariel on Saturday, November 10, 2007 at 4:33pm. So I need a function (parameters: origin x, origin y, destination x, destination y, object x1, object y1, object x2, object y2). The object in this case would be a wall with two points (x1, y1, x2,

91. ## history

where was the 4-h club for Mississippi founded?

92. ## history

what festival happens in Meridian, Mississippi the last week of May each year?

93. ## science

Where does the neutron of heliam come from although hydrogen has no neutron?

94. ## physics

I also need help with 9.67nm=???km and 2.3X10 to the -4g=????ng

95. ## math

please help how do you figure out the compound interest on \$8,000 invested for one year at 6% compounded quarterly. rounded to the nearest dollar

96. ## Science

What is the Mass of a ten-speed bicycle? What is the volume of a punch bowl? Thank you!!

97. ## English

When you volunteer, is that an act of chivalry?

98. ## social studies

where is Jamestown located?

99. ## SCI 275

biome by responding to the following: Provide a one-sentence description of typical precipitation and temperature for summer and winter. Use terms such as cool, cold, warm, hot, dry, and wet. Then, identify the characteristics of a plant and animal that is

100. ## physical science

what is the kenetic energy of a 5-kg grocery cart moving at 7m/s?

101. ## Writing

Are there any sites that offer free assistance or suggestions for English papers? I'm thinking of tutors or skilled professionals.

102. ## Math -

PLEASE HELP ME FIGURE THIS PROBLEM! Solve equation and check the solution -3(r+5) = 3(r - 1)__________________

103. ## Calculus

Find the derivative. Simplify as much as possible. s(x)=(9-12x)/[(x/3)-(1/4)]

104. ## Bio

What happens to the oxygen atoms from glucose?

105. ## history

where is the home of John Grisham?

106. ## Psychology

Why do some people dream and others don't? Why can we only remember parts of our dreams when we wake up?

107. ## French

Is there some kind of rule in French that you don't sound the last consonant of a word? And I want to know what is the difference between tous and tout?

108. ## physics

245kg=????ug I do not know how to change this to ug so if anyone could please show me how I would really appreciate it.

109. ## physics

assuming a peak flow velocity of 3 m/s determine culvert diameter if peak flow rate will 9790 cubic metres per second

110. ## math

How do I find the fraction for 25 ?

111. ## Asronomy

Um what is a quick summary of the myth of Leo?

112. ## maths

solve the following equation for x

113. ## geography

what is the mean of geography?

114. ## math

can someone check my answers please subtract -7.1-(-8.3)= 1.2 multiply (7.6)(1)(-6) = -45.6 divid 90/18 = 5 find the reciprocal of 1/3 (9-4= 5/3 -15-(-12) ---------- -18-(-18) undefined

115. ## algebra

x = 2.077(0.481x) x = 0.999x how would i solve for x?

116. ## Egypt

I need to know like about the dances that the egyptians did in ancient egypt. And I've look alll over the internet and all it told me was what some of the dances were. I need to know like how they did the dances or if it was throw a story or what?

solve for x

118. ## maths

solve for x 8=6^x using logs

119. ## geography

who is the father of geography

120. ## science

what is thermal waste disposal treatment