# Questions Asked onApril 29, 2011

1. ## Calculus/ Vectors

A 10kg mass is supported by two strings of length 5 m and 7 m attached to two points in the ceiling 10 m apart. Find the tension in each string. Help will be much appreciated! :)

2. ## chemistry

calculate the mass, in grams, of NaCl present in each of the following solutions. 6.25 g of 11.5% NaCl solution 452 g of 12.3% NaCl solution please show me how to do these. Thanks.

3. ## physics

Distinguish between properties of the two major types of supernovae: massive star supernovae and white dwarfs. All supernovae represent the explosions of stars, but current understanding suggests there are two basic types of supernovae: one that occurs

4. ## Chemistry

A lab assistant prepared a potassium chloride solution for her class by dissolving 5.34 g of KCl in 152g of water. What is the mass percent of the solution she prepared? Could you help me set this up/show me how to do this problem?

5. ## careers- school ties discussion questions

In the movie, school ties,what was dillon's pettern of prejudice/discrimination.

6. ## physics

A person has a far point of 20 cm. What power glasses would correct this vision if the glasses were placed 1.9 cm from the eye?

7. ## Chemistry

Three solutions are mixed together to form a single solution. One contains 0.2 mol Pb(CH3COO)2, the second contains 0.1 mol Na2S, and the third contains 0.1 mol CaCl2. Write the net ionic equations for the precipitation reaction or reactions that occur.

8. ## HELP!!!!RIGHT NOW!!!!

Which set of side lengths shows similar triangles? (1 points) A) Triangle ABC : 40, 20, 50; Triangle XYZ: 10, 4, 8 B) Triangle ABC : 30, 20, 60; Triangle XYZ: 40, 60, 90 C) Triangle ABC : 110, 80, 60; Triangle XYZ: 6, 8, 5.5 D) Triangle ABC : 32, 20, 32;

9. ## Physics - thermal mechanical

During a workout, a person repeatedly lifts a 13 lb barbell through a distance of 1.5 ft. How many "reps" of this lift are required to burn off 100 Cal?

asked by Erica L
10. ## math

What is the sample space for choosing a letter from the word mathematics

11. ## Math

Circle C has radius 4 inches. Circle D had radius 9 inches. These two circles are connected. Point A,B,and E are points of tangency. Find AB. From point C to point D(which is the radius of circle C plus the raduis of circle D) it is 13 inches. From point C

12. ## history of art

in Picasso's masterpiece Bull's Head, which bicycle part makes up the bull's horns?

13. ## Math

a.)If ABCD is a parallelogram, then ABCD is (always true, sometimes true, OR never true) a rectangle. b.)The diagonals of a square (always true, sometimes true, OR never true) bisect each other. c.)If WXYZ is a rectangle, then the diagonals are (always

14. ## Algebra

How much 20% and 40% copper alloy should be mixed to yield 500 kilograms of 25% copper alloy

15. ## Chemistry

Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?

16. ## chemistry

isomers of c5h12 an be separated by fractional distillation. With suitable reason, state the oder in which they will distil.

17. ## science

what was different about how alchemists and early chemists communicated their knowledge?

18. ## Physics

A rocket cruising past Earth at 0.79c shoots two bullets at 0.92c relative to the rocket with one of the bullets fired along the direction of the rocket's motion and the other fired opposite the rocket's motion. (a) What velocity does an Earth-based

19. ## Chemistry

Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?

20. ## Physics

A uniform 22 kg door that is 2.5 m high by 0.80 m wide is hung from two hinges that are 20 cm from the top and 20 cm from the bottom. If each hinge supports half the weight of the door, find the magnitude and direction of the horizontal components of the

21. ## english

ndicate whether a sentence is a run-on or correct. If the sentence is a run-on, correct it using your knowledge of coordination and subordination. 1. My mother is very politically conservative; she’s written in King George III for president in the last

22. ## Probability

Five cards are drawn from an ordinary deck without replacement. Find the probability of getting a. All red cards b. All diamonds c. All aces

23. ## economics

This is my son who is in 10th grade homework assignment. I want to be able to help and not look like a dope! I really have no clue! 1. Why do economists consider growth in the average labor productivity to be the key factor in determining long run living

24. ## Grammar

Can someone please check this to make sure this is right. The verbs are in quotes. Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. Mark each verb used in

25. ## Math

Julie owns a video store. Her monthlyexpenses, including rent, average $1,185. This year she made$34,620 in revenue. What is the difference between her average monthly revenue and her average monthly expenses? HELP

26. ## english .. Literature ..

The Crucible by Arther Miller 1- What did Tituba do in the forest? a. She danced with the girls b. She accused four women of witchcraft. c. She tried to conjure dead children. d. She sang songs of Barbados. i chose c 2- A possible motivation for later

32. ## Grammar

Can someone please check this to make sure this is right. The verbs are in quotes. Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. Mark each verb used in

33. ## physics

A pendulum consists of a mass m = 0.12 kg hanging from a flexible string of length L. The string is very thin, very light, and does not stretch. It makes small oscillations, with a period of 0.663 s. What is the oscillation frequency of the pendulum? What

40. ## Quick Question

Listen, I am a college student. I have to do a research paper for my Enviornmental Science Paper. I need to use 8 web sources. Does any body know of some good college base sites like any dot gov sites or other sites other than dot com sites? I am going to

asked by Willy Wonka
41. ## 8th grade science

Is it probable that the sun will become a supernova? Why or why not?

42. ## math

A card is pulled from a well shuffled deck of standard playing cards and then put back in the deck. A second draw is made from the deck. What is the probability that an ace was drawn both times?

43. ## algebra 1

A telephone pole stands exactly in the middle between two houses. The houses are 72 feet apart. If a wire is stretched from the top of the pole to the base of the house, its length is 39 feet. A. What is the distance of the pole from each house? 72/2= 36

44. ## algebra2trig

the merry go round music box has a diameter of 12.5 inches. it is scale model of a Hershchell-Spillman Carousel which is 35 feet in diameter. A miniature horse 5.5 inchs from the center of the music box makes one complete rotation in 27 seconds. find the

45. ## physics

How does the temperature affect the diffraction of light in a mirage ?

asked by ashley --
46. ## Geometry

My class is learning about the areas of regular polygons and circles and I'm so confused. How are you supposed to figue out the area a regular triangle inscribed in a circle when all you know is that the radius of the circle is 1.5?

47. ## Social Studies

Facts about King Philip

I am doing Unit Analysis and I can not fugure out how to set the promble up on these 3. Am not great at these because there like word prombles can you please help. I just need to know how to set it up. 1.How many cubic meters are there in a cubic mile? (1

asked by Shawn L
49. ## ETH/125

Write a 1,050- to 1,400-word research paper in which you identify the linguistic, political, social, economic, religious, and familial conventions or statuses of four Hispanic groups living in the United States. The paper must address Mexican Americans,

50. ## Math(Please check)

1) Find the equation of the following lines: A)Through the point (-4,2) and perpendicular to the line y=-1/2x +1 y-y1=m(x-x1) The reciprical of -1/2 =2 So my answer is y-2=2(x+4) or simplified y=2x+10 B)Through the point (1,1) and parallel to the line

51. ## chemistry/ electrochemistry

1. What is the value of the equilibrium constant for the reaction occurring in the cell shown below at 298 K? Ag(s) | Ag+(aq, 1 M) || Cu2+(aq, 1 M) | Cu(s) Report your answer to four significant figures in scientific notation (1.234E-3 or 1.234E3). Can

52. ## algebra

2x-3y=2 x+2y=-20 solve each system by sudstitution

53. ## physics

An elastic cord is 69 {\rm cm} long when a weight of 79 {\rm N} hangs from it but is 90 {\rm cm} long when a weight of 170 {\rm N} hangs from it.What is the "spring" constant k of this elastic cord?

54. ## physics

How will the frequency of sound change how fast the sound travels?

asked by ashley --
55. ## organic chemistry

Draw structural formula 4-propyl-1-methyl-cyclohexene

f(x,y)=x^2 - y^2 a)partial derivative with respect to x. So this means that you hold y^2 constant so would that be 0. So the answer would be 2x? b) partical derivative with respect to y. 2y

f(x,y)=x^2 e^2x lny (2,1) I need to find the partial derivatives with respect to x and y. I have not idea how to do this especially with the (2,1).

58. ## english .. Literature ..

The Crucible by Arther Miller 1- What did Tituba do in the forest? a. She danced with the girls b. She accused four women of witchcraft. c. She tried to conjure dead children. d. She sang songs of Barbados. i chose c 2- A possible motivation for later

59. ## math

State whether the following sequence is arithmetic, geometric, or neither. 0, 1, 4, 9, 16, 25, 36, .... (Points : 1)

60. ## calculus

Please help find the solution to the initial value problem dy/dx=(1+2cos^2 x)/y with(y>0), and y=1 when x=0. Thanks.

61. ## Math(please check)

1) Differentiate the following: a) y=(x^3+5x)^6 (x^2+1)^7 (6(x^3+5x^)^5 * 3x^2+5) + (7(x^2+1)^6 *2x) * (x^3+5x)^6 b) y=(x+1)^2 / x^2 (2(x+1)*1) * (x^2) - 2x *(x+1)^2 all over (x^2)^2 Are these correct?

62. ## math

what is 25 more than 5 times and number and x

63. ## math(Please check)

Find the derivative of the following: 1=x^2+4xy+4y My answer is 2x. Is this correct?

64. ## Algebra

Could someone tell me what I am doing right or wrong? Problem Two: 5/9 + (2/9)x = 25/7 + (6/7)x – 2/3 Like signs are not collected at the beginning. This would make the equation unequal. To make both sides equal we first multiply all sides by nine and

65. ## science

" Use the words mass, volume, and density to distinguish between gases, liquids, and solids in terms of the particle theory of matter." I don't understand what to do. Am I supposed to describe the mass, volume, and density of each fluid?

66. ## Discrete Math

Please help with this problem. Thanks a/ Show that for any real number x, if x>1 then |x^4|=< |23x^4 + 8x^2 + 4x| b/ Show that for any real number x, if x>1 then |23x^4 + 8x^2 + 4x| => |x^4| c/ Use the big Theta and big O-notations to express the results

67. ## english

Please check grammar correctint comma splice sentences and need to use more the 1 method. Original sentence: Unfortunately Anthony did not live to see the 1920 passage of the Nineteenth Amendment giving women the right to vote,she died in 1906. My

68. ## programming

write a program that determines how many names are on the boy's and girl's list.

69. ## alegebra

how to you simplify 5 sqrt 320 how do i start

70. ## Science

Where can I find AP Environmental Science old AP exams? I need to study.

71. ## critical and creavtive thinking

Assignment: Together We Stand Letter Suppose you live in a new suburban community. It offers all the amenities and benefits of a tight-knit small community, with the benefits of living close to the big city. Some years pass, and several children and adults

72. ## psychology

1. Stress can be the root cause of psychological disorders. Name four symptoms shared by acute and posttraumatic stress disorders.

73. ## Math

How many different numbers can you create out of the five digits: 1,2,3,4,5 ?

74. ## English

Whatis Pronoun antecedent agreement?

75. ## Calculus

Express the region inside the leaf of the rose r=2sin2? in the first quadrant as an iterated integral over R?

76. ## economics

Here are data for Germany and Japan on the ratio of employment to population in 1979 and 2003 1979 for Germany is 0.33 2008 for Germany is 0.49 For Japan 1979 is 0.48 2008 is 0.51 How would I find the average labor productivity for each country in 1979 and

asked by Ling Chow
77. ## English

I forgot to include the following doubts. Thank you very much. I included first the sentence with mistakes and then the correction. By the way, can you say "the writer of a novel/novels / the novelist"? 1)The first two themes are linked to the fact that

78. ## Physics

A crowbar is used to wrench open a wooden crate. The crowbar is situated so that a point 8 cm from the end digging into the box acts as a pivot point. The crobar is gripped on the other side, 29 cm away from the pivot. If the person exerts a force of 110

79. ## physics

what is the answer to the following 2 physics equations: a=(v, little f in right bottom corner -v little 0 in bottom right corner /t. I need it simplified to what t is and T^- 2n into the square root of L/g I need the equation simplified to get g

asked by Kelli Kenyon
80. ## algebra

a jeweler purchased 5 oz of a gold alloy and 20 oz of a silver alloy for a total cost of $540. The next day at the same price per ounce, the jeweler purchased 4 oz of th egold alloy and 25 oz of the silver alloy for a total cost of$450. Find the cost per

81. ## Physics

we are supposed to manipulate the equation and the equation is d=(1/2)at square. There are no numerical values for either question I submitted. They just wanted it manipulated down to it's simplest form

asked by Kelli Kenyon
82. ## Business Ethics

You are a high level manager who has been asked to present a PowerPoint presentation to your employees on the concepts of stakeholders and corporate social responsibility. Your PowerPoint presentation must include the following: • What is a stakeholder?

Write the equation of the tangent line for the curve y=x^3+3x-8 at point (2,6) Would I take the derivative of the equation and then plug in 2 and then plug everything into y-y1=m(x-x1)?

You work for the city of Bigtown's legal department. Bigtown has been trying for years to attract more convention business, but it has been unsuccessful to date. The new mayor was voted in on the tagline, "I'll make Bigtown the place to see and be seen."

85. ## english

it is hard to get help whit homework

86. ## algebra

what is 2x+3y=-5,3x+5y=-9 in substitution form

87. ## math

Marcus flips a coin and tosses a six-sided die with the sides numbered 1-6. What is the probaility that he gets a head on the coin and a number divisible by 3 on the die?

88. ## math

A card is pulled from a well shuffled deck of standard playing cards and then put back in the deck. A second draw is made from the deck. What is the probability that an ace was drawn both times?

89. ## algebra

simplify (y+5)(y+1)

90. ## English 102

Can someone give me feedback on this please. Introduction Is same-sex marriage going to create issues in our society? Same-sex marriages will most likely produce issues in many political agendas. Religious leadership of Abrahamic faith everywhere will also

91. ## calculus

Find the volume generated by revolving the region bounded by y=18x-3x^2 and y=9x about the y-axis. a. pi/12 b. pi/6 c. 3pi/4 d. pi/3 help! .. :D

92. ## physics

a steel has a steel lid that is stuck tightly to the can. is it possible to open the can by running it under hot water? 1. yes 2. no 3. yes but only if the bottom of the can is submerged in ice water while the top is run by hot water. 4. no but could open

93. ## Math

The tangents to a parabola with focus (1,2) are x+y=0 and x-y=o. Find the length of latus rectum.

94. ## health

Employees from the billing department are not receiving the accurate codes and information needed for data entry, slowing production and payment for the doctor. As head of the billing department, you have been delegated to lead a problem-solving team to

95. ## math

expand in words 43560440

96. ## Math

If you input 0 1 2 3 and the output is 25 43 61 79 what is the rule

97. ## Social Studies (quick thanks)

Are there any Nfl players who are not u.s citizens

asked by Naresh Jafar
98. ## math

If it was one adult per eight kids on a trip and a total of 54 peopple going on the trip how many of them woould be kids?

99. ## History

I'm trying to find the consequences of the second great awakening and all I can find is the great awakening. How else can I look other than google? Thanks

100. ## English

I need you to check the following sentences on the same theme. Thank you very much. 1) You should start your paragraph with an introductory sentence and write a conclusion at the end. 2) Your paragraph must be preceded by an introductory sentece and

101. ## English

I forgot to include the following sentences. Thankk you. 1) You changed very little from the notes I gave you on photocopy. You can’t include everything. Select the information you really need to answer the questions and try not to exceed the ten lines.

102. ## French for Sydney

I typed the Geographical Expressions, etc. in Word and made a PDF to post here. Hopefully you can read it far better. FRENCH: GEOGRAPHICAL EXPRESSIONS The definite article is used with names of countries, continents, provinces, mountains, and bodies

103. ## 10th Grade Commerce (LAW)

possible options of resolving an attempted murder case?

asked by Crissy XD
104. ## Trig

Water is being pumped at a 3 cubic feet/minute into a cylindrical storage tank with a circular base of a radius 4 feet. Find the depth of the water (d) as a !@#\$%^&ntion of time (t)

105. ## english

does anyone know a poem about foolish friend please write it down thank you

106. ## current events

how did workers try to control the rising temperature and pressure

Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This

asked by Bon Oncle
108. ## math

Write a function of the form Y=ax^2+c whose graph passes through the two given points (2,1),(5,-20)

109. ## Quick Question

What kinds of products are steam engines built into?

asked by Willy Wonka
110. ## JOB INTERVIEW

What are your strengths? What are your weaknesses? What are some strengths and weaknesses?

111. ## algebra

tana rode a boat 1 km upstream in and hour. rowing at the same rate, she made the return trip downstream in 15 minutes. find the rate of the current

112. ## accounting

if direct material is 6.69, direct labor 3.33, variable overhead 1.27, and fixed overhead .088. if your producing 2400 units what is your total fixed cost and what is the variable cost per unit?

113. ## Algebra

What is the slope of the line that passes through the points (3, 3) and (2, 5)? m= 2 m= -1/2 m= 1/2 or m= -2 I came up with m= - 1/2 but I'm really not sure if Im correct

114. ## math

A bag contains 7 red checkers and 11 black checkers. One checker is drawn and replaced. Then a second checker is drawn. What is the probability that a red checker was drawn both times?

115. ## Algebra

what is the next number in this sequence? 0.4, -2, 10, -50 choices are -110, 250, 100, 120 would it be 250

116. ## algebra

What is the next number in the sequence. 0.9, 5.4, 32.4, 194.4, ... Is it 1166.4

117. ## Algebra

what is the next number in this sequence? 0.4, -2, 10, -50 choices are -110, 250, 100, 120 would it be 250

118. ## English

I forgot to include the following sentences. Thank you very much. 1) Sykorax’s magic is evil (maleficent has the same meaning?) since it derives from (originates from?) a pact with the devil. The novels of Defoe or Defoe’s novels, the novels by Defoe

asked by Henry 1

Evaluate: f(x,y)=2x^3e^y a) partial derivative with respect to x. I know that you have to treat y as a constant but I have no idea what to do. I do not understand partial derivatives at all. Please help!! b) partial derivative with repsect to y.

120. ## algebra

how do you use the substitution method to solve x + y =2 y = -2x

121. ## algebra

solve (4x^2+2x-4) - (x^2-5x-4)= I came up with 3x^2+7 is my answer correct?

122. ## education

what does the typical public school child look like from a demographicand socienomic standpoint can you please give me an answer to this question

asked by debbie abbene
123. ## education

What is the total budgetexpened in PK-12 Pblic Schooling in the United States Break this down by individual states Please help me and give me the answer to this question

asked by debbie abbene
124. ## math

a 4 liter bottle of water costs 1.40. the unit price is

125. ## introduction to films

a scene is a series of shots joined to communicate a unified action at one time and place. Is this true or false?

126. ## I'm in desperate need of h

I'm in desperate need of help for a huge titration lab and finding the molarity. if I give you the problem could you help?

127. ## animal help

I just found a baby bird.We think it is a red cardinal.My family is unsure what to feed it.It is newborn.What do we do?

128. ## physics

• How will the amplitude affect the speed of sound?

asked by ashley --
129. ## statistics

Determine the condition on coefficients "a subscript i" so that the linear combination "Summation symbol from i=1 to n for 'a subcript i'times 'X subscript i'" is an unbiased estimate of E[X].

130. ## English

Thank you very much. Here are some sentences I'd like you to check. I included my doubts in brackets. 1)They trained him to be good and not evil. (bad?). Miranda taught Caliban how to put his thoughts in(to) words without gabbling like an animal.

131. ## calculus

what is the area bounded by x axis, x =2 and y^2 = 8x?

132. ## Chemistry

What happen to the mixed of copper sulfate crystals and sand when adding same water on it ?

133. ## algebra

A CAN'S DIAMETER IS 3 INCHES, AND IT HEIGHT IS 8 INCHES. WHAT IS THE VOLUME OF THE CAN.

134. ## Math

1/(1+(1/2+1/2)^6*(2)^3)is

135. ## economics

how perfect is the competition in the market for cola drinks ?