# Questions Asked onFebruary 11, 2008

1. ## Algebra II

I'm confused.. 1. The cables of a suspension bridge are in the shape of a parabola. The towers supporting the cable are 600 feet apart and 80 feet high. If the cables touch the road surface midway between the towers, what is the height of the cable at a

2. ## physics

A small 2g plastic ball is suspended by a 20 cm long string in a uniform electric field. If the ball is in equilibrium when the string makes a 15 degree angle with the vertical, what is the net charge on the ball? E=10^3 N/c(answer: 5.25x10^-6) Work: I

3. ## physics

An electron starts from rest 3cm from the center of a uniformly charged sphere of radius 2 cm. If the sphere carries a total charge of 1x10^-9C, how fast will the electron be moving when it reaches the surface of the sphere? (answer: 7.26x10^6 m/s) F=k

4. ## Math

What multiplication fact can be found by using the arrays for 2x9 and 5x9?

5. ## Chemisty

Aluminum hydroxide forms a positively charged sol. Which of the following ionic substances should be most effective in coagulating the sol? NaCl CaCl2 Fe2(SO4)3 K3PO4 The idea behind coagulating sols is to use those salts that have the highest + and -

6. ## chemistry

The density of a 15.00% by mass aqueous solution of acetic acid, CH3COOH, is 1.0187g/mL. What is (a) the molarity? (b) the molality? (c) the mole fraction of each component?

7. ## physics

A piece of copper wire has a resistance per unit length of 6.45*10-3 /m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.140 m. The ends of the wire are connected to a 12.0 V battery. Find the magnetic field strength at the

8. ## Algebra

The folrmula F=9/5c+32 can be used to make temperature conversions with the Celsius ans Fahrenheit temperature scales. F-Fahrenheit temperature C=Celsius temperature Convert 100 degress Fahrenheit to the Celsius temperature scale. Book says answer is 37.78

9. ## english

Last time I tried this the whole essay didn't get shown. If I am doing something wrong please tell me how. "In “Class in America-2003,” Gregory Mantsios argues that America favors the rich and a person’s race and class standing greatly influences

10. ## English

In “Class in America-2003,” Gregory Mantsios argues that America favors the rich and a person’s race and class standing greatly influences their wealth, health and education. By comparing the myths and realities of the American dream of equal

11. ## physical science

A person takes a trip, driving with a constant speed 85.6 km/h except for a 22.6 minute rest stop. If the person's average speed is 61.6 km/h, how far is the trip? Answer in units of km.

12. ## math

1)In triangle ABC, C=60 degrees, a=12, and b=5. Find c. A)109.0 B)10.4 C)11.8 D)15.1 I chose B 2)Which triangle should be solved by beginning with the Law of Cosines? A)A=115 degrees, a=19, b=13 B)A=62 degrees, B=15 degrees, b=10 C)B=48 degrees, a=22, b=5

OK. I think I have my head around most of this but for one question. I have plotted a graph with the quadratic equation tickets=-02x^2+12x+11. My graph opens down and shows I will sell tickets for 60 days peaking at the vertex at 30 days where I sell 191

14. ## Math

The floor areas of a living room on a house plan measures 3 1/2 inches by 4 5/8 inches. If the scale is 1/4 inch = 1 foot, find the length of the longest side of room in feet. ________

15. ## biology

Can someone explain at what point during cellular respiration glucose is completely oxidized? Thanks.

16. ## square roots

How do I figure out the square root of 90 over 2

17. ## Trig functions and such

1)Find the exact value of cot(-315) A)1 B)square root of 2 C)square root of 2 over 2 D)2 I chose C 2)Find the exact value of sin(-pi/6) A)-1/2 B)-square root of 3/2 C)-square root of 2/2 D)square root of 2/2 I chose A 3)In triangle ABC, C=30, c=22, and

18. ## Physics

A person with a mass of 85kg. How much in newtons do they weigh on the earth and the moon?

19. ## chemistry

Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C . Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)

20. ## chemistry

The molecular structure around the oxygen in water is . ---is the answer bent or angular?

21. ## biology

What are endergonic reactions? How can endergonic reactions proceed in organisms? An endergonic reaction is a chemical reaction where the reactants have a lower free energy than the products. Enderonic reactions are coupled to exergonic reactions which

22. ## Chemistry

Two substances in a glass beaker react chemically and the glass beaker becomes too hot to touch. A. Is this an exothermic or endothermic reaction. It would be exothermic, right? Because energy is released? B. If the two substances are defined as the

23. ## Com

There are many distinctions among the different types of communication techniques used in the business world. · Select two techniques. · Provide an example of when it is appropriate to use each in corporate communication. 2. CheckPoint: Letter Writing

24. ## chemistry

Woiuld you expect jewelry made from an alloy of silver and copper to tarnish (oxidize) in a laboratory where fumes of bromine are present? I think that it wouldn't because the bromine fumes are probably not ions, and even if they were they would not react

25. ## Gen CHEM 2

I need to produce a buffer solution that has pH 5.28. I have already 10 mmol of acetic acid. How much solid sodium acetate will i need to add to this solution? pKa of acetic acid is 4.74. I plugged in all my info to the Hendersen/Hasslebalch equation but I

26. ## English

What is a synonym for melancholy?

27. ## Physics equation?

can anybody tell me an equation that can be used to find the number of electrons flowing through an LED every second? and also refer or give me any information that could explain another mechanism (apart from the fact that they denote energy to a single

28. ## chemistry

Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C . Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)

29. ## Math

How many sheets of 3/4 inch thick plywood can be placed on a shelf that is just over 18 inches high?

30. ## Algebra

How do I perform this division? 2x-7divided by -x-21+2x squared

31. ## Math

A designer's architectural drawing has a room which is 1 3/4 by 2 5/8 inches. If the scale is 1 foot = 1/8 inch a) find the length of the longer side of the room feet b) find the length of the shorter side of the room feet

32. ## us history

what types of job did women have in the era of reform.

33. ## Science Project

Do people prefer higher priced chocolate bars considered a Science Experiment? I plan to test one low, med and high priced chocolate to 10 blind folded taste testers. My mom doesn't think this is science?

34. ## economics

How have American Corporations influenced China's and India's recent economic growth?

35. ## Chemistry

My question is why is benzene less reactive than 1,3,5-cyclohexatriene? I cannot find anything on 1,3,5 cyclohexatriene and why it is more reactive. I know that benzene does not undergo addition reactions and is extremely stable to oxidizing reagents. C

36. ## bio

Compare and Contrast: diglyceride vs. dipeptide vs. disaccharide Compare and contrast: GTP vs. UDP vs. AMP

38. ## Social studies

i need to make an essay about two stories 1st- the tell tale heart 2nd- the speckled band, sherlock holmes story the only problem is the essay needs to be about what they have in common and what differences they have and mix it into paragraphs any help?

39. ## physical science

A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. how much force was exerted on the Puck?

40. ## physical science

A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. How much force did the puck exert on the hockey stick?

41. ## science

where can i find the moon patterns for the month of january/feb. 2008?

42. ## physical science

find the net force produced by a 40 Newton force and a 50 Newton force in each of the following cases: Both forces act in the same direction both forces act in opposite directions.

43. ## statistics

What is the purpose of a tukey test? Why can't we compare all the posible pairs of group means using the two-sample t-test?

44. ## biology

Role of microvilli of cells of kidney tubules?? Role of cilia in cells lining trachaea?

45. ## physics

The electron gun in a color TV accelerates the electrons through about 25,000 Volts. Estimate the acceleration of such an electron due to the magnetic field of the earth. Hint: In Atlanta, the Earth's magnetic field has a magnitude of about 5.2 X 10-5 T.

46. ## chemistry

Does the element sodium have properties in common with NaCl? Explain

47. ## physics

An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +40 ft/s2. After some time t1, the rocket engine is shut down and the sled moves with constant velocity v for a time t2. If the total distance traveled by the

48. ## physics

In a lightning bolt, 13 C of charge flows in a time of 1.5*10-3 s. Assuming that the lightning bolt can be represented as a long, straight line of current, what is the magnitude of the magnetic field at a distance of 29 m from the bolt?

49. ## calculus

evaluate integral or state that it is diverges integral -oo, -2 [2/(x^2-1)] dx ----------------------------------- integral -oo, -2 [2/(x^2-1)] dx Through partial fractions, I came up with lim [ln(x-1)-ln(x+1)] b, -2 b->-oo I get (ln(3)-0)-(oo-oo)). The

50. ## English

Who killed Naruto Uzamaki?

51. ## physical science

a car of mass 900 kg move at 10 m/s. What is the braking force required to stop the car in a time of 5 seconds?

52. ## english

what did the line "this was the most unkindest cut of all" reveal about julius caesar?

53. ## people

James Monroe Need to research for grade 2, any good sites?

54. ## arithmetic

how do you break down a division problem such as 2%734?

55. ## physcial science

what is the three branches and three systems of geology.

56. ## gography

what were budda's teachings?

57. ## physcial science

a 50 kg crate is lifted to a height of 10 meters. a. how much potential energy does the crate have after being lifted? b. if it took 5 seconds to lift the crate, using a machine what was the power rating of the machine?

58. ## Biology

What is the sybiotic relationship between a bacterium and another organism

59. ## physical science

if an engine must do 500 joules to pull a 10 kg load up to a height of 4 meters, what is the efficiency of the engines?

60. ## chemistry

how do i convert these 0.25g = how many cgs 400 cm^3 = how many Ls and 400 cm^3 = how many m^3s?

61. ## pre calc

sketch the graph y=abs(x)+2 then sketch over the y=x line.

62. ## ALGEBRA

HOW DO YOU FACTOR a^3-27?

63. ## algebra

I need help with exploring and graphing functions can anyone please explain them to me? The problems look like this: {y=x+3} {y=-2x+3}

64. ## factoring

could anybody help me figure out step by step how to factor this expression: x^10+x^5+1(please) p.s. i need to explain this on the hw

65. ## MATH

THE DIFFERENCE BETWEEN TWO NUMBERS IS 16. FIVE TIMES THE SMALLER IS THE SAME AS 8 LESS THAN THREE TIMES THE LARGER. FIND THE NUMBERS? HOW DO YOU SOLVE THIS? PLEASE.

66. ## math

man A takes 2 cards from a deck and says "one is an ace." Man B takes 2 cards (from a new deck) and says, "one is the ace of spades." Is one of them more likely to have 2 aces in his hand than the others. Explain.( are they equally likely or not?)

67. ## government

what provision do we have in our United States Constitution that allows us to adapt to changing times?

68. ## ENGLISH

WHAT KIND OF MONKEYS CAN FLY?

69. ## ALGEBRA

A GROUP OF STUDENTS GO OUT TO LUNCH. IF TWO HAVE HAMBURGERS AND FIVE HAVE HOT DOGS, THE BILL WILL BE \$8.00. IF FIVE HAVE HAMBURGERS AND TWO HOT DOGS, THE BILL WILL BE \$9.50. WOULDNT THE ANSWER BE \$1.50

70. ## Physics

Find the gravitational force between the sun and the earth in newtons?

71. ## Physics

Find the orbital velocity of a satellite orbiting 1800km above sea level in meters per second?

72. ## Physics

The moon orbits 3.84 x 10^8m form the center of the earth. How fast does the moon travel in meters per second?

73. ## Chemistry

How would i figure out the vapor pressure at room temperature? (atmospheric pressure is 760 mm hg and the temperature is 20C.)

74. ## chemistry

how do i convert these 0.25g = how many cgs 400 cm^3 = how many Ls and 400 cm^3 = how many m^3s?

75. ## Math

how do you find the cirumference and area of a circle if the radius is 4.5?

76. ## Chemistry

Indicate which is more soluble in ethonal: acetic acid CH3COOH or stearic acid C17H35COOH I think acetic acid maybe more soluble but I don't know why

77. ## physics

A 10000 car comes to a bridge during a storm and finds the bridge washed out. The 700 driver must get to the other side, so he decides to try leaping it with his car. The side the car is on is 24.0 above the river, while the opposite side is a mere 6.80 m

78. ## Psychology

What are electrolytic lesions in terms of psychology and the brain? I can't find it anywhere and I don't know what it means...

79. ## History

My assignment is to write an editorial for the London Telegraph(Britain).I have to write as if it was the summer of 1914 when World War One began and state what i think are the real causes of the World War One through the eyes of Britain. Could you give me

80. ## Calculus

the points a, b, c, d, e, f, g are equally spaced along a line. Name a vestor which is equal to 3BD

81. ## English

Can you give me a mythological reference to a product? because i can't find any :(

82. ## algebra

What is the invers of: y=2log(x+1) and please explain this to me..not just an answer.

The Minnetonka Corporation, which produces and sells to wholesalers a highly successful line of water skis, has decided to diversify to stabilize sales throughout the year. The company is considering the production of cross-country skis. After considerable

84. ## geometry

I'm having trouble with an assignment that asks me to design a structure so that the sumof the measures of the interior angles of all the individual convex polygons is 4500 degrees. i'm souppoused to have a triangle a hexagon an octagon and a rectangleall

85. ## physics

A speedboat increases its speed uniformly from 20 m/s to 32 m/s in a distance of 240 m. (a) Find the magnitude of its acceleration. ?m/s2 (b) Find the time it takes the boat to travel the 240 m distance. ?s

86. ## English

Would anyone mind looking over this persuasive essay? I need to pass in a sample of writing for my petition to move into an advanced English class, and I've decided to revise this one. The writing is sort of mechanical, but I suppose that's how English

What makes some companies more profitable than others? What are the similarities and differences between profit and profitability? Provide real-world examples to support your answer.

88. ## American History

How did the Navigation Acts help colonial development?

89. ## Chemistry

If I2 reacted with hexane, how would we know, which carbons the Is go on? Would only one of the iodine go to the hexane and the other form HI, or would they both join and H2 is a by-product?

90. ## Math

Suppose that a New Jersey testing service has created a standardized test for assessing the reading and computing skills of 8th graders. The test consists of a reading part, which is structured to have a mean of 200 and a standard deviation of 50. It also

91. ## precalc

the graph of a cubic function has a local min at (5,-3) and a point of symmetry at (0,4). At what point does a local maximum occur? i don't quite know how to figure this one out, any help?

92. ## Chemistry

I'm trying to do a lab, and I need to find the concentration of FeSCN+2 in five solutions based the calibration curve and the absorption. I have a calibration curve, the number of mLs and initial moles of Fe+3 and SCN-, the transmittances, the

93. ## Chemistry

Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)

94. ## chemistry

Are dispersion forces in hexane weaker than that of pentanol?

95. ## chemistry

400 cm^3 = how many Ls and 400 cm^3 = how many m^3s the last tutor that helped me didn't break these two down clearly

96. ## Long Division of Polynomials

How do you do this problem? x^3 - 2x^2 - 3x + 12 ____________________ x + 2

97. ## Math

Help on this problem , please! 2x^3 - 3x^2 + 7x - 3 _____________________ 2x - 1

98. ## physics

four particles with charges +5x10^-6C, +3x10^-6, +3x10^-6C, and +5x10^-6C are placed at the corners of a 2m x 2m square. (a)determine the electric potential at the center of the square, assuming zero potential at infinity. (answer:3.83x10^4V)(b) If one of

99. ## AED 200

How does having school choice options affect the funding of public schools?

100. ## Algebraic Functions

How is this problem solved? x^3 + 7x^2 - 49 _______________ x + 5

101. ## grammar

For instance, money can help us have a more comfortable lifestyle, but if we do not have the inventors, the producers, servers, and etc., the money we make would be pointless. Is there a period after etc?

102. ## Physics

A ball falling from rest is located 45 m below its starting point 3.0 s later. Assuming that its acceleration is uniform, what is its value?

how do you organize the following information regarding process reports? feasibilty/recommendation reprots, and incident reports in a corporate environment

What is the invers of: y=2log(x+1) and please explain this to me..not just an answer.

105. ## chem

The reaction A + B „³ C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?

106. ## Chemistry

Aluminum hydroxide forms a positively charged sol. Which of the following ionic substances should be most effective in coagulating the sol? NaCl CaCl2 Fe2(SO4)3 K3PO4 The idea behind coagulating sols is to use those salts that have the highest + and -

107. ## Calculus

Right now my class is working on exponential growth and decay. I know that i have to find the integral of both sides and solve for Y but I don't know how to do so exactly. Here's the problem: if dy/dx=3Y(10-Y) integrate to solve for Y

108. ## Physics

Ann is driving down a street at 58 km/h. Suddenly a child runs into the street. If it takes Ann .71 s to react and apply the brakes, how far will she have moved before she begins to slow down? Answer in units of m. When I converted 58km/h I got 16.111 m/s

109. ## math

When finidng the lest common multiply why how do you know which way to list the factoring so that you get the LCM 12=2*2*3 16=2*2*2 I say 2*2*2*3=24 LCM should be 48 What am I doing worng?

111. ## Chemistry

Hey; I'm currently in a kinetics class and I am trying to do a prelab for a lab that we haven't learned the material for yet and I'm really stuck, and we unfortunately don't have a textbook for the class so I was hoping someone could help. We have the

112. ## geography

where are the rocky mountains?

113. ## English

What does the phrase "like a pig going for truffles" represent? Persistence?

114. ## sra JMcGuin spanish

can you check this - i am not sure about my grandfather wants to see sports cars. What is SEAN ??? another othe mistakes hope your hand is better Hola muchachos. Esto fue viaje largo. Primero volé a Nueva York y en seguida esperé seis horas el avion

115. ## Brain Size and Intelligence

What is the relationship between brain size and intelligence?

116. ## Chem=continued

I'm currently working on a lab in which I have to make the solution boil at 245 degrees F. The solution will be a mix of ethylene glycol and I have to caluculate the volumes of water and solute needed to make the solution. here's my work so far. X= mL

117. ## english

Can someone help me to check the grammar to see whether this paragraph make sense or not. if not, can you help me to correct it. thanks!! The report on the issues of feminism shapes both the stereotypes of women and the impact of the audience. Some

118. ## algebra

multiply and simplify 10x^3 over 3r^3 multiplied by 9r^4 over 100x Is the correct answer 3x^4r^6 over 10??

119. ## algebra

Simplify by removing factors of 1. 9v-81 over 9v

120. ## Economics

I have to draw some Supply/demand curves and I want to know if they are right Personal computers: more user-friendly software become available and the costs of inputs are reduced. Supply moves to the right, demand moves to the left, quantity goes up and so

I need to provide a quadratic equation that models the number of expected tickets sold each day x. (x=1 is the day tickets go one sale). tickets=-0.2x^2+12x+11

122. ## Humanities

Are there any parallels between the rise and fall of the Roman Empire and the U.S.A today?

123. ## math

1 ounce of Tostitos provides9% of the MDV of fat

124. ## chemistry

The reaction A + B --> C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?

125. ## COM 135

Discontinuation of major equipment components for a computer network upgrade will cause a major setback in the installation of the network for a project you are managing. You must provide information about the delay to your project team members, to upper

126. ## economics

why do consumer surplus shrink after taxes or imposed on trade?

127. ## Math - Algebraic Vectors

1) The vector v = [-6, -2] has tail "A" and head "B". Graph each point "A", and determine the coordinates of "B". a) A(8, 5) How would I find the coordinates of B for the question? Do you find it by adding the x values together and the y values together?

128. ## Algebra 2

How do I solve this quadratic function by finding square roots 2x²=200 ?

129. ## bio

what is Neurogalia? and example of it ?

130. ## scientist

In What role does Galileo play in for the theories of geocentric and heliocentric?

How do I solve this quadratic function by finding square roots 2x²=200 ?

132. ## electromagnetism

Why does the speed of wind have no affect on a homemade electromagnetic generator attatched to a windmill? I did an expiriment using a windmill and altered the wind speed 3-11mph. There was no change in the amount of amps genrerated. Are my results just

133. ## biology

Compare and Contrast: diglyceride vs. dipeptide vs. disaccharide Compare and contrast: GTP vs. UDP vs. AMP

134. ## American History

I know that the reasons for the United States entrance into WWI are to ensure Allied repayment of debts to the United States and to prevent the Germans from threatening U.S. shipping, but how can I explain them more specifically? Please give me some ideas.

135. ## Math

There are 231 cubic inches in a gallon. How many cubic inches are needed to fill a container with a capacity of 12 2/3 gallons? ______ cubic inches

136. ## Math

If a car averages about 22 1/2 miles per gallon , and the capacity of the tank is 16 1/4 gallons, how many miles would be expected on a tank of gas?

137. ## Chemistry

Urea (NH2)2CO is dissolved in 100.0 g of water. The solution freezes at -0.085 degrees C. how many grams of urea were dissolved to make this solution. delta T = Kf*molality Plug in 0.085 for delta T, I assume you know Kf for water, calculate molality. Then

138. ## Math

How many pieces of 5/8 inch plywood can be placed on a forklift that is 4 feet high?

139. ## Math

Divide: How many 3/4 inch pieces can be cut from a 36 inch piece of wood? _______

140. ## Biology

okay, were supposed to answer the following question, i have the basic idea ( i think) and i was just wondering if someone would read over it and what i put and then help out with what im missing Describe humoral immune response in humans. Include the kind

141. ## Math

Mike had done a division problem which was scribbed on a piece of paper and it involved 3 mixed numbers. ? / 2 3/4 = 4 1/2. He couldn't read the first mixed number. Find out what ? is ______________