# Questions Asked onOctober 12, 2008

1. ## Chemistry

A. The forensic technician at a crime scene has just prepared a luminol stock solution by adding 13.0 g of luminol into a total volume of 75.0 mL of H2O. -What is the molarity of the stock solution of luminol? B. Before investigating the scene, the

2. ## Chemistry

After 0.6523 g of CoCl2*6H2O is heated, the residue has a mass of 0.3423 g. Calculate the % H20 in the hydrate. What is the formula of the hydrate? -I understand how to get the % H2O in the experiment but how do you determine the formula?

3. ## novel help

Hello, I need to write a short review on the novel Girl Interrupted while I have read the book twice I can't find how the disorder that Susanna Kaysen has affected her family members, does it say in the book, also I need to put what treatment she received

4. ## chemistry

A weather balloon is inflated to a volume of 27.0 at a pressure of 730 and a temperature of 31.3. The balloon rises in the atmosphere to an altitude, where the pressure is 365 and the temperature is -14.6. Assuming the balloon can freely expand, calculate

5. ## Chemistry I

An unknown volume of water at 18.2 degrees celsius is added to 24.4 mL of water at 35.0 degrees celsius. If the final temperature is 23.5 degrees celsius what was the unknown volume? (assume no heat is lost to surroundings and D of water is 1.00g/mL)

6. ## math

how do i figure out this problem. the average human blink their eyes 6,205,000 times each tear. if a person is awake for 16 hours a day, how many times will she blink a day? a hour, a minute?

7. ## Solve

Solve 1/C=1/C1 + 1/C2 for C1 This multiple choice and the listed answers are: a.)C1= CC2/(C2-C) b.)C1= C-C2/C c.)C1= C+C2/CC2 d.)C1= C+C2/C2

8. ## chemistry

A weather balloon is inflated to a volume of 27.0 at a pressure of 730 and a temperature of 31.3. The balloon rises in the atmosphere to an altitude, where the pressure is 365 and the temperature is -14.6. use as a ideal gas behavior

9. ## Statistics

PLEASE CHECK AND SEE IF I HAVE THESE ANSWERS CORRECT. T F 1. Hypothesis testing is a procedure based on sample evidence and probability theory to decide whether the hypothesis is a reasonable statement. ANSWER (True) T F 2. For a one-tailed test using the

10. ## English

A question on "The Lottery" by Shirley Jackson ? I am writing an essay explaining how the use of literary devices creates a sense of horror. I wrote down things like "withheld knowledge" (that the author not telling readers the "prize" of the lottery) but

A boy pushes a lawn mower with a mas of 17.9 kg starting from rest across a horizontal lawn by applying a force of 32.9N straight along the handle, which is inclined at an agle of 35.1 degrees above the horizontal. The magnitude of the mower's

12. ## Chem

high purtity benzoic acid (C6H5COOH; ^Hrxn for combustion is -3227kJ/mol) is used as a standard for calibrating bomb calorimeters. A 1.221g sample burns in a calorimeter(heat capacity=1365J/C) that contains exactly 1.270kg of H2O. What temperature change

13. ## chemistry

last check: (c) A wine cooler contains 4.5% ethanol by mass. Assuming that only the alcohol burns in oxygen, how many grams of wine cooler need to be burned to produce 3.12 L of CO2 (d = 1.80 g/L at 25°C, 1 atm pressure) at the conditions given the

14. ## chemistry

When a 28.8mL of .500M H2SO4 is added to 28.8mL of 1.00M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, the temperature rises to 30.17 degrees Celsius. Calculate the ^H(change in enthalpy)of this reaction. (assume total volume is the sum of

15. ## Chemistry

Need Help with these two problems 1.One piece of copper jewelry at 111°C has exactly twice the mass of another piece, which is at 36.0°C. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside

16. ## chemistry

In the experiment, a hydrate is heated to form an anhydrate. The masses of the before and after are measured and the percent of the water in the hydrate is calculated. If some of the hydrate spatters out of the crucible and isnt noticed, how will this

17. ## Social Studies

Peidmont region what are two important industries/what way do people use the forest for in the piedmont region

18. ## physics 2!!**

Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 45 kg skater acquires a speed of 0.71 m/s. If the speed of the other skater is 0.84 m/s, what is this skater's mass?

19. ## physics

A man of mass 64.5 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 24.3 kg and is 3.6 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

20. ## Lit

Invisible Man: Mr. Norton- "you are my fate, young man" he talks about emerson's self realiance and how emerson is important but isnt he going aganist emerson's theory of self reliance??

21. ## physics!!**

In a typical golf swing, the club is in contact with the ball for about 0.0015 s. If the 45 g ball acquires a speed of 75 m/s, estimate the magnitude of the force exerted by the club on the ball.

22. ## AP Statistics

A certain density curve looks like an interverted letter V. The first segment goes fro the point (0,0.6) to the point (0.5,1.4). The segment goes from (0.5.1.44) to (1,0.6). (a) Sketch the curve. Verify that the area under the curve is 1, so that it is a

23. ## chemistry

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 1.55 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

24. ## history??

i would like to know what's the different between the two questions i know that the answer for the first question is plymouth but is the second question is it asking the same answer or what i am confused >????? The permanent settlement in new England was

25. ## Chemistry

A 2.00 ml sample of an aqueous solution of hydrogen peroxide, H2O2 (aq) is treated with an excess of Kl (aq). The liberated I2 requires 12.40 mL of 0.1025 M Na2S2O3, for its titration. Is the H2O2 up to the full strength (3% H2O2 by mass) as an antiseptic

A 2.00 ml sample of an aqueous solution of hydrogen peroxide, H2O2 (aq) is treated with an excess of Kl (aq). The liberated I2 requires 12.40 mL of 0.1025 M Na2S2O3, for its titration. Is the H2O2 up to the full strength (3% H2O2 by mass) as an antiseptic

27. ## com220

while it is true that just about anyone can engage in blogging. Can a blog ever be considered trustworthy based on the credibility of the author?

28. ## physics

An athlete at the gym holds a 4.33 kg steel ball in his hand. His arm is 68.7 cm long and has a mass of 4.69 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor? Torque = massball x

29. ## Math another problem

Solve 1/C=1/C1+1/C2 for C1.

30. ## english

Complete the sentence below by interrupting it with two parallel if clauses: The problem of race relations, if………., and if………. must be solved.

31. ## Physics

The magnetic field inside a solenoid is 8.617 mT. If this solenoid sits with its central axis perpendicular to a 30 mT magnetic field, what is the magnitude of the torque on the solenoid

32. ## physics

An athlete at the gym holds a 4.33 kg steel ball in his hand. His arm is 75.0 cm long and has a mass of 5.28 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor? Responses Physics -

A. Joe won a lottery jackpot that will pay him \$12,000 each year for the next ten years. If the market interest rates are currently 12%, how much does the lottery have to invest today to pay out this prize to Joe over the next ten years? B. Mary just

34. ## MGT

theses are the 8 steps... 1. Be alert to indications and symptoms of problems. 2. Tentatively define the problem. 3. Collect facts and redefine the problem if necessary. 4. Identify possible alternatives. 5. Gather and organize facts concerning identified

35. ## language arts

What is the difference between constructivist classroom and traditional classroom?

36. ## math check question

Subtract and Simplify: 4a^2/(a-b)-(4b^2-8ab)/(b-a) I have the answer as 4(a+b)^2/(a-b) or should it be 4(a-b)^2/(a-b) Responses Math problem check - bobpursley, Sunday, October 12, 2008 at 4:23pm just the numerator.. 4a^2-8ab + 4b^2, right? 4(a-b)^2 Now

37. ## physics

A coaxial cable has an inside conductor of radius 'a' carrying a current 'I'.The current returns as a uniform current through the outside conductor with a inside radius 'b' and outside radius 'c'.What is the magnetic field at a distance 'r' from the

38. ## physics

A coaxial cable has an inside conductor of radius 'a' carrying a current 'I'.The current returns as a uniform current through the outside conductor with a inside radius 'b' and outside radius 'c'.What is the magnetic field at a distance 'r' from the

39. ## english

can someone help me write a narrative essay using the pronoun I with 3 to 10 pages and 750 to 2500 words

40. ## BEHAVIORAL SCIENCE

Think about the last time you attended a lecture or were in a classroom. Applying the information processing model, why did some things make it into your short-term memory and some things into your long-term memory? How can knowing this process increase

41. ## latin

When I am translating Latin sentances, where should I start. Should I identify what all the words mean or should I find the subject of the sentence or maybe the main verb.

42. ## Algebra

Snooker's lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as lumber. It makes a profit of \$30 on a unit of lumber and \$45 on a unit of plywood. How many of each unit must be produced

43. ## physics

What is the force on an electron moving at v = 2.5*10^5 m/s away from a long wire,3mm from the electron, carrying a 12 A current? Give the magnitude & direction of the force. I calculated mag induction using B = u0I/2(pi)*a and force on the electron using

44. ## plz help english

my question is:- Complete the sentence below by interrupting it with two parallel if clauses: The problem of race relations, if………., and if………. must be solved. question is i wrote:- the problem of race relation, if it goes on increasing, and if

45. ## Word problem check

one summer, Van mowed 4 lawns for every 7 lawns mowed by Fiona. Together they mowed 132 lawns. How many did Fiona mow? I have the answer as 84 is that correct?

46. ## Math

Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem? I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I am lost after that This is a multiple choice question and I am not getting any of

47. ## Chemistry

How do you find molar mass?

48. ## Algebra 1

so im not that good with word problems so... here it goes. Nadine has 7 more nickles than Delano has dimes. If Delano gives Nadine 4 of his dimes, then Delano will have the same amountof money as Nadine. How much money do they have together, assuming

49. ## Science

Is this correct? work= .01 x mass x distance mass measured in grams distance measured in meters Is this right??

50. ## Pre-Calculus

Find the coordinates of the center, the foci, the vertices, and the equations of the asymptotes of the graph of the equation: (x+1)^2/2-y^2/8=1. Center: (-1,0) foci:(-1+/-sqrt1, 0) vertices: (-1+/-sqrt2, 0) equations of the asymptotes: y-0=sqrt8/sqrt2(x+1)

51. ## Math word problem

Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind? I don't understand any of the responses. You have to assume in this case the wind retards and assists

52. ## French Geography Project

I need to know a popular activity and a Cuisine in Mauricie, Canada and I have been looking for a long time but can't find either one of them. Do you know where I can find them? Thanks

53. ## Civics

What does a political party do after it wins the election in order to govern?

54. ## Math check

subtract and simplify: 4a^2/(a-b)- (4b^2-8ab)/(b-a) I have the answe as 4(a-b) is this correct?

55. ## com220

out of the questions below Elaborate on the authorship of one of the sources that you consider reliable. 1.what is the purpose and affiliation of the organization or author related to the article? 2.what are the author's credentials? 3.is the information

56. ## math

the difference between two numbers is 235. If the larger number is 876 what is the small number

57. ## Algebra

I am supposed to find the ticket sales of a concert using this formula: N(x)= -0.3x^2 + 6x + 15 X represtents the number of days since the concert was first announced. I need to find out when daily ticket sales will peak and how many tickets will be sold

58. ## physiology

neurotransmitter release would be inhibited by a.stimulating repolarization of the axon terminal b.blocking Ca2+ influx in the axon terminal c.blocking repolarization of the axon terminal d.stimulating protein kinase activity I think its b, but not sure

59. ## math

please help me figure out how to do thes problems 4. y/2+5=-12 6. x/3-9=0 7. 14+h/5=2 THIS IS IMPROTANT Y/2, X/3 AND H/5 ARE FRACTIONS. it doesnt mean divide its fractions that's why i need help plse tell me how you did it so i can figure out the rest of

60. ## physics

The 17.9 cm diameter disk rotates on an axle through its center. F1=22.1 N, F2=32.4 N, F3=32.4 N, F4=22.1 N, and d=4.74 cm. What is the net torque about the axle?

61. ## college

why did the Versailles treaty failed to be ratified? I understand it was due in part to the senate, but what I don't understand is why the senate failed to ratify it.

62. ## introduction to healthcare

What role do health care workers play in determining quality care?

63. ## Math

How would you go about solving this problem? A 2000 L tank containing 550 L of water is being filled with water at the rate of 75 L per minute from a full 1600 L tank. How long will it be before the two tanks have the same amount of water?

64. ## Math problem still stuck

Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I have multiplied the LCD of (a-8)(a+7)(a+22)by both sides with no luck. This is a multiple choice question a.)

65. ## Math problem check

Simplify: (2/a + 6/b) / (8/ab + 4/a^2) I have the answer as a(3a+b)/(4a+2b) Is that correct?

66. ## Math check 3

f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I have multiplied the LCD of (a-8)(a+7)(a+22)by both sides with no luck. This is a multiple choice question a.)

67. ## Math problem

Solve: 5/(x-8)-5/x = 40/(x^2-8x) How would this be solved?

68. ## physiology

what percent of blood flow to the body per minute goes to the brain ? 10, 20, 25, or 30% ?

69. ## science

In 1960 physicist Theodore Maiman constructed the first working laser.This design was improved upon Bell Telephone Laboratories in 1961.Since then lasers has been found to have a wide variety of applications.Identify one application of laser technology and

70. ## Economic

After 18 months, if a GDP only increased by 3/4 of the expected amount; what factors might be responsible for this.

Alana: ....Do you believe that powerful factions today, have destroyed, or have the potential to destroy the republic that the Founding Fathers have created, or do you think that factions help the assist the formation of a more developed nation? I agree

72. ## Calculus

Find the interval(s) where the function is increasing and the interval(s) where it is decreasing. f(x) = 3x + 5 ok...i think you find the derivative first...? but i thought u had to find the critical points somehow... i am so lost! can someone show me how

73. ## Math check 2

Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) (t-24) + 7(t+7)=3(t-8) solve for t. The choices are: a.)-97/5 b.)122/5

74. ## accounting

how do i prepare year-end adjusting entries?

75. ## Math problem check

Subtract and Simplify: 4a^2/(a-b)-(4b^2-8ab)/(b-a) I have the answer as 4(a+b)^2/(a-b) or should it be 4(a-b)^2/(a-b)

76. ## Algebra

The perimeter of a rectangle is 90 meters. The length is 9 meters more than twice the width. Find the dimensions. I need the length and the width. Thanks!

77. ## I need someone to check this

Add and Simplify: 100x/x+10 + x^3/x+10 I have the answer as X^3+100x/X+10 is this correct?

78. ## physiology

the blood-brain barrier prevents hydrophobic molecules from diffusing into the brain. T or F Excitable cells are incapable of maintaining a constant resting membrane potential. T or F The membrane of resting nerve cells is more permeable to______ions than

79. ## math question.

any additional data that would be useful or necessary to solve this problem using your strategy(f) If you answered yes to the question in step (e), what are some possible sources for this data? (g) For assistance in testing your hypothesis, do you feel

80. ## 220

Do you believe that writing your outline helped you when you wrote your final draft?

81. ## com220

because the author of the page backed his informatin up with citations. The question is:What if the supporting citations are not authentic?

82. ## Pollution

what is the difference between pollutants and impurities? Is there even a difference?

83. ## Help

Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind?

84. ## Social Studies

can someone please help me?? im so confused with this. :( Columbus's journey to the Americas in the 15th century led to many changes in the new world. a. Identify the resulting convergence of cultures and items that were introduced to the old and new

85. ## math

Divide. 23.92 ÷ 4

86. ## Math assistance needed

Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) is this correct ot what am I doing wrong? I don't understand the rest so

87. ## physics

The mass of each of the two blocks is 1.50 kg, and the insulated tank is filled with 220 g of water. What is the increase in the temperature of the water after the blocks fall through a distance of 2.50 m? I am trying to use the eq Q=MCTriangleT however i

88. ## Pre-Calculus

Find the equation of the ellipse whose semi-major axis has length 6 and whose foci are at (3,-2+/-sqrt11). I have the focal constant = 2a which means that a=3 but don't know how to proceed. Thanks.

89. ## math

indo european number system

90. ## Math check

Find the y-intercepts for the function given by: f(x)= 4/(x+5)-1/(x-4)/2/(x-3)+3/(x+2) I am stuck

91. ## Math check 3

Simplify: 9/(y+8)-y/(y-2)+(y^2+4)/(y^2+6y-16) IS the answer y-14/(y-2)(y+8)?

(8-6)*5-28

93. ## Math

3. You recently started the paperwork to purchase your new home, and you were just notified that you can move into the house in 2 weeks. You decide to hire a moving company, but are unsure which company to choose. You search online and are interested in

94. ## CE: re ART

Finally heard from my son; he wanted to check the answer to your ART question "The first american painting to reach the million mark was "Three Flags" by Jasper Johns. It was purchased by the Whitney under the director Tom Armstrong (worked with him). It

95. ## Formula help

Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem?

How would you factor 3x^3-4x^2+4x-1? P.S. Factor theorem does not work here.

97. ## Math

Solve: (t+24)/(t^2-t-56)+7/t-8=3/t+7

98. ## Math

Solve: 3/(9x-6)=5/(7x+1) I have the answer of 11/8 it is probably wrong.

99. ## Math

Rearrange for J; n=(2J+1)exp(-(BJ(J+1))/(KT)) where T, B and K are constants

100. ## HISTORY HELP

I'm reading my book and from what i'm getting here is that the progressives demanded a more activist government but what im not understanding is how they justified their demands.

Solve: x^2+y^2=10 and xy=3 Answer: (+/-3, +/-1) or (+/-1, +/-3)

102. ## Algebra

two angles are complimentary. The sum of the measure of the first angle and half the second angle is 75 degrees. Find the measure of the angles. What is the measure of the smaller angle? what is the measure of the other angle?

103. ## Math check 4

Find the y-intercepts for the function given by: f(x)= 4/(x+5)-1/(x-4)/2/(x-3)+3/(x+2) Math check - Damon, Sunday, October 12, 2008 at 5:56pm The y axis intercepts are the values of the function when x = 0 4/5 - [(1/-4)] / [(2/-3)] + 3/2 Math check -

104. ## writing

I'm trying to write a company bio. I just want to know what you think and see if it needs improvement. 1. Who are you (literally) 2. What do you do? What is your area of expertise? 3. Who does this help? What needs do you fulfill for others? 1. Who are

105. ## macroeconomics 205

Last month, you sold an old car to your neighbor for 5000 dollars. The neighbor repainted the car at a paint shop for 500 dollars, of which only 400 was paid in cash and the rest in credit. By how much (if any) GDP in 2006 is affected?

106. ## Math

m=y^2-y^1/x^2-x^1 solve for i1

107. ## English comp 1

I am writing about teen suicide but I am finding it difficult to write a claim statement. Can you helP?

108. ## Math

Simplify: (X^2+X-2)/(X^2-9)/(X^2-6X-16)/(X^2-6X+9) I have the answer as (X-3)(X-1)/(X-8)(X+3) is this right?

109. ## physics 3!!**

In a football game, a tackle running at a constant speed of 5 m/s tackles a stationary receiver. The two fly off horizontally at 4 m/s, before they hit the ground and begin to slow down. If the mass of the tackle is 120 kg, a.) What is the mass of the

110. ## Math

140/297 write fraction in simpest form

111. ## Math

for my math project I have to know how much mass is in a superball. . . . THANKS!

112. ## sequnces

my teacher said to find out about a sequce and find the man it is named after . it is 1,1,2,3,5,8,13,21........ and i have got to find out the rest

113. ## Pre-Calculus

Find the equation of the hyperbola whose vertices are at (-1,-5) and (-1,1) with a focus at (-1,-7). So far I have the center at (-1,-2) and part of the equation is (y+2)^2 - (x+1)^2 but do not know how to figure a^2, b^2, or c^2. Help please....

114. ## math check

I have a problem that I need checked it is the produce of the reciprocals of two consecutive integes is 1/182 Find the integers. I have as the answer -13,-14 or 13,14 is this correct?

115. ## Math Analysis

Find two rational expressions that have a sum of 9-9x/x^2-9 I need steps not just answers

116. ## health and social

helppp .. what does health and social acttually meann ??

what mode median and mean?

118. ## a problem

Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) is this correct ot what am I doing wrong?

the 13 colonies were broken down to

120. ## english

write a sentence beginning with three if clauses

121. ## BIOLOGY

What is one practical biotechnological use of plasmids?

122. ## math

need to linearize r=u(1-exp(s/k))*c where some combination of r, s, and c is the independent variable, s or c is the dependent variable, and u and k must be involved in the parameters of the linearization

123. ## physical science

what must be add or removed in order for matter to change state?

need to find what component of 77 is

125. ## science

he served a four year apprentship to a blacksmith