# Questions Asked onDecember 4, 2007

1. ## chemistry

Why is the formal charge on B in BF4- is 1?

2. ## physics

A .100 kg meter stick is supported at its 40.0 cm mark by a string attached to the ceiling. A .700 kg mass hangs vertically from the 5.00 cm mark. A mass, m, is attached somewhere on the meter stick to keep it horizontal and in rotational and translational

3. ## physics

A uniform disk with a mass of 800 g and radius 17.0 cm is rotating on frictionless bearings with an rotational speed of 18.0 Hz when Jill drops a 130 g clod of clay on a point 7.10 cm from the center of the disk, where it sticks. What is the new rotational

4. ## chem

how do you write the equilibrium expression for: C3H8 + SO2->

5. ## Math

Les Fleurs, a boutique in Paris, France, had the following accounts in its accounting records at December 31, 20X2 (amounts in Euros, denoted as "E") Purchases………………... E250,000 Freight In……………… E8,000 Sales discounts………….

6. ## math

a rectangular garden 30 m by 40 m has two paths of equal width crossing through it as shown. Find the width of each path if the total area covered by the path is 325 M^2 (m squared) help

7. ## Math

Find the area between y=3sinx and y=3cosx over the interval [0,pi].

8. ## Is this how you derive the formula for arc length?

For a smal change in x, dx: ds² = dx² + dy² ds = sqrt [(dx² + dy²)] s = INTEGRAL of sqrt [(dx² + dy²)] s = INTEGRAL of sqrt [(dx² + dy² * dx²/dx²)] s = INTEGRAL of sqrt[(1 + dy² * 1/dx²)] dx s = INTEGRAL of sqrt[(1 + (dy/dx)²)] dx

9. ## AP Biology

In cattle, the gene pair for red (RR) or white (WW) coat color shows an absence of dominance. Heterozygotes (RW) have a roan coat. Outline a breeding procedure to establish apure breeding herd of red cattle from a roan bull and white cow. A cattle breed

10. ## physics

A diver can change his rotational inertia by drawing his arms and legs close to his body in the tuck position. After he leaves the diving board (with some unknown angular velocity), he pulls himself into a ball as closely as possible and makes 2.16

11. ## Calculus

A section of highway connecting two hillsides with grades of 6% and 4% is to be build between two points that are separated by a horizontal distance of 2000 feet. At the point where the two hillsides come together, there is a 50-foot difference in

12. ## Indicators and Solutions

Which indicator is used to check for the presence or absence of simple sugars? What indcates the presence of simple sugars in a solution? What indicator is used to check for the presence of starch? What indicates the presence of starch in a solution?

13. ## english

can any one help me by getting me some info on princess diana her life story or a biography or something but not he wikipedia because i have that already so plz help me ty

14. ## math

A full grown oak tree loses an average of about 7 tons of water through its leaves per day. About how many tons of water is that per year? I need an exact answer using partial products. Can anyone please hlep?

what are the advantages of having an optical biopsy?

16. ## math

what am I? I am a polygon and I have two right angles and one pair of parallel sides. Is it a rhombus? Please help.

17. ## science

when on a roller coster at which point is the kinetic energy and potential energy located????

18. ## Earth Science

Hello, I need help with this question: When and why did eruptions occur with the volcanoes Pinatubo, Tambora, and mount toba. thanks

19. ## earth science

Hello another question: why is yellowstone national park thought to be significant relative to volcanoes. thanks

20. ## Algebra

I need the equation for this problem: I sold some books for \$10 total on the Internet. If I had sold them at my garage sale I only would have received \$6 or \$4 less. What percentage did I gain by selling on the Internet?

21. ## trigonometry

find soultuion in degree, use exact value 1. cos2xcosx+sin2xsinx=-1/2

22. ## physics

What are vector components?

23. ## math

well, if its not a rhombus or a trapezoid then.... what has two right angles and one pair of parallel sides?

24. ## physics

if the pulling force P is 150 N and the crate dosent move, what is the magnitude of f

25. ## Psychology

Are IQ tests an acurate reflection of intelligence? Are there social factors that influence the results of IQ tests?

26. ## factoring

Factor x3 + 9x2 + 27x + 27 Factor 8a3 + 60a2b + 150 ab2+ 125b3 I tried doing them, but I just don't get how; perfect squares didn't work and neither did decomposition... someone please help me.

27. ## Science

why is the process of mitosis and meiosis important to a living organism? when would an organism need to undergo the process of mitosis?meiosis? what would happen if meiosis did not occur? any links or ideas?

28. ## science

what are 2 types of weathering?

29. ## Mitochondria

Assume Cell 1 produces 1.0 x 105 ATP molecules while Cell 2 produces 1.0 x 108 ATP molecules. Which mitochondria, A or B, has the hardware to produce 1.0 x 108 ATP molecules? What told you this?

30. ## Science

Why are waves called perpetuaing waves

31. ## HUM 130

Why do you suppose Guatama's leaving his wealth and family led to a religion that is the 4th largest in the world today? What exactly was the "spark" that caused the religion to spread like wildfire?

32. ## math

I don't understand how to write the formulas for unit analysis. I can do the problems, but the explanation of the formulas in my book doesn't make sense with the problems I am doing. For instance, this one: Find the unit rate: \$2 for 5 cans of vegetables.

33. ## AP Biology

Hi you guys I am having trouble with the cell communication chapter so I would really appreaciate if someone could help out with this question "What could happen to the target cells in an animal that lack receptors for local regulators?" I know that some

34. ## Math

To determine if 3417 is prime, you would have to try dividing 3417 by every whole number less than 3416. True or false and how did you get the answer

35. ## AP World History

I have to do a project that is like a ABC book for the Islamic religion. Like A is for apple, i just have to do them in islamic terms. I have everything but X and I have been all over the internet with no luck!! If you can help me out, it could be a person

36. ## geography

does anyone know what the three parts of climate are? i know two are precipitation and temperature. what is the third part??

37. ## civics

explain two weaknesses of the Articles of Confederation

38. ## algebra

Which one is greater 5/6 or 8/9? I think it's 8/9.

39. ## civics

why was the ratification by New York and Virginia critical to the success of the Constitution

40. ## algebra

a and b are both the lengths of the legs of a right triangle, c is the length of the hypotenuse. Find the missing length if b=24 and c=25. I don't know how to do this.

41. ## English

In Great Expectations by Charles Dickens, Chapter 16-17, in what ways does Pip seem immature?

42. ## science

What type of electromagnetic radiation does a flame emit?

43. ## science

Why is visible light arranged into colors in order: red, orange, yellow, gree, blue, indigo, and violet?

44. ## science

How could a thermogram taken of a home be helpful to the homeowner?

45. ## trigonometry

How do you work these out? sec u- 1 / 1-cos u = sec u sec x-cos x= sin x tan x 1/sin x - 1/csc x= csc x - sin x

46. ## Social Studies

What are the checks and balances? (In our government)

47. ## Religon

What is the difference between the way Buddhists understand a person who has realized their buddha-hood (बुद्ध) and the way Western religions experience the relationship between a Divine Being and the founders of religions? In other words, why

48. ## Physics, almost have it!

In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an

49. ## religion

Was there only one Buddha? This seems like a weird question. the first step is to decide what Buddha means and whether or not it is a name.

50. ## science

how does a water that you poured into a filter represent the concept of turbidity in nature?

51. ## Physics???

When the air temperature is below 0 C, the water at the surface of a lake freezes to form a sheet of ice. If the upper surface of an ice sheet 24.2 cm thick is at -10.7 C and the bottom surface is at 0.00 C, calculate the time it will take to add 1.80 mm

52. ## language arts

use a comma after introducttry elements in a sentence...can you give me an example if that kind of sentence??

53. ## Trigonometry

[sinxcosx/(1+cosx(]-[sinx/(1-cosx)]= -(cotxcosx+cscx)

54. ## Physics

A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s after traveling some distance. If the coefficient of kinetic friction is 0.35, find that distance. Can someone please show me the

55. ## Albebra

c squared-4c-12=0 we have to solve each equation by completing the square.

56. ## science

If radio waves are not compressional waves,like sund waves, what is their role in enabling us to hear music?

57. ## Social Studies

I need help on these problems: 1.This water rising device cosists a simple leaver. 2.Which Egyptain word decribes the word Red Land, the desert 3.This Egyptaion god is represented by the Niles croc. 4.Blank is one of the world's oldest civilation and Busch

58. ## Science

why is the process of mitosis and meiosis important to a living organism? when would an organism need to undergo the process of mitosis?meiosis? what would happen if meiosis did not occur? any links or ideas?

59. ## math

what pattern do you see in this list

60. ## math

what is the solution for the logarithmic equation log2(x2+2x-44)=2? x2=x squared

61. ## AP US History Essay

Explain why Britain finally decided against intervention on behalf of the Confederacy. In what ways was Britain helpful to the South anyway? I got the first part of the essay question, but i am having difficulty with the second. Any help would be

62. ## trig

how do you solve this problem? 1+sinØ/cosØ +cosØ/1+sinØ = 2secØ and cosß- cosß/1-tanß = sinßcosß/sinß-cosß

63. ## world history

During caesar's rule, was italy affected?..and was italy even known around that time, like did they trade alot with other countries in the roman empire

64. ## algebra

if x+20-x=0 how do i find what x is

65. ## Physics

A 5.70 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.4 N at an angle theta = 27.5° above the horizontal. The coefficient of kinetic friction between the block and the floor is 0.10. What is the speed of the block

66. ## Algebra

I'm having trouble tunring 5 3/11 into a decimal. Can you explain it to me?

67. ## french

If i want to ask what clothing you are wearing today, is it Quels vetements or Qu'est-ce vetements tu portes or portes-tu aujourd'hui?

68. ## Math

Can somone explain what this means For a paper on philosophy of mathematics? Formalism holds that mathematical statements may be thought of as statements about the consequences of certain string manipulation rules.

69. ## african literature

what is the meaning of the poem "africa" by david diop???

70. ## economics

What does internalizing an externality mean?

71. ## French

so, how do u really say this quote in french? "You are in love when suddenly reality is in your dreams, and you cannot sleep anymore." help?

72. ## Physics-Rutherford

Can you please give me a brief explanation of Rutherfords experiment?

73. ## physics

Two window washers, Bob and Joe, are on a 3 m long, 345 N scaffold supported by two cables attached to its ends. Bob, who weighs 750 N stands 1 m from the left end, as shown in Figure 8.37. Two meters from the left end is the 500 N washing equipment. Joe

74. ## portugese

Adeus Ano Veho Feliz Ano Novo Que Tudo se relize No Ano Que Vai Nascer Muito Dinhero no bolso Saude pra dar e vender can some plz translate this portugese song thanks

75. ## african literature

what is the symbolic item will represent the poem "africa" by david diop???

76. ## Accounting

Can anyone give me a list of contra accounts and the accounts that they are contra counts too

77. ## pre-calc

How do you find the asymptotes in general?? For example... f(x)=(1/2)^x, how would I find that?

78. ## PHysics-almost complete!

In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an

79. ## Atoms

You discovered a new atom! Wow, everyone at your lab is impressed!! Some are saying you may be nominated for the Nobel Prize in Medicine!!! If this is going to happen, you have to find out as much about the atom as you can, and you don’t have long to do

80. ## Mathematics

Differentiate ln(x)-1 I have d/dx lnx-1 = d/dx(ln x)- d/dx1 = d/dx(ln x) = 1/x Could you tell me if this is right or not? If not, please suggest the right working out.

81. ## Hum 130

How has modern civilzation impacted the spirtual lives of the indigenons people

82. ## Ions, Ions

ION // H+ IONS OUTSIDE THE CELL // 2,000 IONS INSIDE THE CELL // 10 Will this ion enter or leave the cell? Explain why.

83. ## Calculus

Find the volume of the solid obtained by rotating the region enclosed by the graphs of y=15-x, y=3x+11 and x=0 about the y-axis.

84. ## history

what is a group of people captured and taken to Babylon by the Chaldeans?

85. ## Psychology

What is "moral education" ?

86. ## Another Ion Question

ION // F- IONS OUTSIDE CELL // 19,000 IONS INSIDE CELL // 20,000 Why would this ion leave the cell? Explain please.

87. ## Trigonometry

x square root of 2 + 3x =4 all over square root of 2

88. ## math

Find the perimeterof a decagon if each of its sides are 5.9 yards long?

89. ## rec and leisure

does anyone have any ideas of a class interaction i could use for a presentation on youth recreation.

90. ## Trig

x[sqrt of 2] + 3x = 4

91. ## math

wat is 45x320?

92. ## analytical chemistry

What is the pH of a solution formed by mixing 14.35 mL of 0.200 F HCl with 0.322 g of Na3PO4, followed by dilution to 500.00 mL?

93. ## analytical chemistry

What is the pH at the equivalence point in a titration between 0.4450 F NH3 and 0.1520 F HCl?

tell sme the answers to pig skin geogphy right now please right now please well i need them poisted

95. ## maths

given function G(x)=1/3(x-2)^2-3 2

96. ## maths

Given g(x)= 1/3(x-2)^2-3 2

Hi Can anyone tell me if this is correct X Sq - 4x - 16 = 0 using X = -b + Sqrt b sqrd - 4ac / 2a a =1, b = -4 , C = -16 x = -(-4) Sqrt (-4)sq - 4 x 1 x -16 / 2 x 1 = 4 + - Sqrt 80 = 9 + or minus 8.944/2 + = 4 + 8.944 = 12.944/2 = 6.472 - = 4 - 8.944 = -

In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an

99. ## Maths

If we have p^2+p^3 how can it be simplified ?

100. ## Science

I am confused about diffusion in liquids can u explain it plz?

101. ## physics

A figure skater is spinning at a rate of 1.7 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 62% of its original value. What is her new rate of rotation?

102. ## Digital Logic

The input voltage to a certain op-amp inverting amplifier is 10 mV, and the output is 2 V. What is the closed-loop voltage gain?

103. ## Digital Logic

How many flip-flops, in a shift register, would be required to hold an initial count of 16?

104. ## english

how is the concept of empathy illustrated and developed in Raymond Carver's "cathedral"

105. ## MaTh WoRd PrObLeM

Many years ago, a cruise liner sank in the middle of the Pacific Ocean. The survivors luckily landed on a remote desert island. There was enough food for the 220 people to eat once per day; this would make the food last for three weeks. Six days later a

106. ## Chemistry

Can someone tell me why N2^2+ is a diamagnetic molecule based on MO theory and diagrams? I get a bond order of 2, which is paramagnetic.

107. ## Maths

How do you work out the IQR off of a scatter graph? Thanks !

108. ## chemistry

Are 0,1,2,3 values of the orbital quantum number of a 3p electron correct? or is the values 0

109. ## science

similarities+differences between a light microscope and a electron microscope?