# Questions Asked onDecember 2, 2008

1. ## Calculus

If x + 7y = 29 is an equation of the line normal to the graph of f at the point (1,4), then f'(1) = PLEASEEE HELP!

2. ## Science

How do I prepare 1% H2SO4 from concentrated sulphuric acid (96% with density 1.84g/ml)? Thank you very much for your help.

3. ## Trig

Find all the solutions in the interval [0,2pi). 2sin2x - sqrt(2) = 0 sin2x = sqrt(2)/2 I'm confused by the double angle. Please help.

4. ## chemistry

when aluminum metal reacts with iron (III) oxide to form aluminum oxide and iron metal, 429.6 kJ of heat are given off for each mole of aluminum metal consumed, under constant pressure and standard conditions. What is the correct value for the standard

5. ## physics

A loudspeaker is placed between two observers who are 114 m apart, along the line connecting them. If one observer records a sound level of 61.6 dB and the other records a sound level of 81.3 dB, how far is the speaker from each observer?

6. ## chemistry

The molar mass of sucrose, or table sugar, is 342 grams. Calculate how many grams of sucrose are required to make 3.0 liters of 0.50M sucrose solution.

7. ## Physics help, pl0x

A 1.0 times 10^3 kg elevator carries a maximum load of 800.0 kg. A constant frictional force of 4.0 times 10^3 N retards the elevator’s motion upward. What minimum power, in kilowatts, must the motor deliver to lift the fully loaded elevator at a

8. ## Chemistry

What is the group 3A element that forms the most basic oxide? I thought it was TI, why isn't it? thanks

9. ## physics

Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 14.0 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 54.0 cm. What is the

10. ## physics

Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 14.0 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 54.0 cm. What is the

11. ## physics

a coin rests on a book. the book tilts until the coin just begins to move. the angle is 17 degrees. what is the coefficient of static friction?

12. ## Chem

will Ne or Xe have a higher boiling point? why?

1. Goldfarb owns a 500 acre tract of land known as Blackacre. He executes a deed conveying Blackacre with the following language, “To March for life, then to Hunt.” March is excited to receive Blackacre, but soon executes a deed to the property with

14. ## math

can you help me find the probability to the question? A spinner like the one shown is ued in a game. Determine the probability of each outcome if the spinner is equally likely to land on each section. Express each probability as a fraction and as a

15. ## physics

Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 14.0 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 54.0 cm. What is the

16. ## English

What does Martin Luther King mean by "Continue to work with the faith that unearned suffering is redemptive?"

Goldfarb owns a 500 acre tract of land known as Blackacre. He executes a deed conveying Blackacre with the following language, “To March for life, then to Hunt.” March is excited to receive Blackacre, but soon executes a deed to the property with the

18. ## Diffraction

Question Details: A row of seats is parallel to a stage at a distance of 8.70 m from it. At the center and front of the stage is a diffraction horn loudspeaker that has a width of 7.50 cm. The speaker is playing a tone at a frequency of 9300 Hz . The speed

19. ## ap world history

how did geography affect the trade patterns of africa and of asia during the time period of 300 bce and 1000 ce?

Hello, Please give me some useful websites for the following subjects: Amphibians and Reptiles Bioprocess Reach for the stars(Astronomy) Disease Detectives Crave the wave Anatomy: Circulatory system, and nervouse system. The test is open book, and I want

21. ## English

I NEED HELP IN TRYING TO WRITE A INTEROFFICE MEMO WITH ALL THIS INFORMATION. Background Phoenix Advertising, with its main headquarters in Charlotte, North Carolina, serves clients that include banks, insurance companies, and retail chains. You’re the

22. ## history

“The Gettysburg Address” What message did the Gettysburg Address communicate to our war torn nation in 1863? How are the ideals articulate in the speech still relevant for our country today? supply as much info as possible!

23. ## Chemistry

A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original

24. ## AP World History

What's the best way to read the chapter? For my class. We must read the chapter, takes notes, as well as identify people and terms/concepts. We also have to answer study questions. I soon discovered an online student center where it showed an outline of

25. ## ap world history

what effect did the indian ocean trade have on have on the societies that take part in it? what factors determine the extent or the significance of the effects of trade on society?

26. ## chemistry Plz help!

To make NaTcO4, Tc metal is dissolved in nitric acid to make HTcO4, NO2 and H2O. Then the product HTcO4 is treated with NaOH to make NaTcO4. If you begin with 4.5 mg of Tc metal, how much of NaOH (in grams) is required to convert all of the HTcO4 into

27. ## Math

The school had a bake sale to raise money. A group of 11 students bought either chocolate chip cookis for \$.40 cents each or brownies for \$.50 cents each. The total amount they spent was \$5.10. How many chocolate chip cookies and brownies did they buy?

28. ## physics

A source of sound (1000 Hz) emits uniformly in all directions. An observer 3.19 m from the source measures a sound level of 39.2 dB. Calculate the average power output of the source.

Does any one know a really good websites for 6th grade math ? I'm behind in math and need to catch up or else I'll be really super dum . I need HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

30. ## math

A log is cut into 4 pieces in 12 seconds. At the same rate how long would it take to cut the log into 5 pieces? HINT: the answer is not 15

31. ## Chem

Could someone explain to me how to prepare (a) zinc chloride by an acid-base reaction and (b) by a gas formation reaction. If the starting materials available are ZnCO3, HCL, CL2, HNO3, NaCL, Zn(NO3)2, and Zn. Thanks so much for any info.

A piece of lead with a mass of 27.3 g was heated to 98.90oC and then dropped into 15,0 g of water at 22.50oC. The final temperature was 26.32oC. Calculate the specific heat capacity of lead from these data. This is what I did. Could you check my answer? I

33. ## History

I have 3 questions 1. Which of these was not necessary to get Jamestown started in 1607? a. charter from the king b. propaganda to recruit settlers c. a joint-stock company d. the headright system 2. How was Jamestown's relationship with the Indians from

34. ## physics

A car moving at a speed of approximately 176.5 km/h. 923 m in front of the car, there is a truck moving at a speed of 84.2 km/h in the same direction. 1.What is the name of the physical process that would occur if both vehicles kept moving at constant

35. ## Chemistry. What equation do I use?

A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original

36. ## Algebra

Here is my question: If (2, -3) and (-5, 4 are the endpoints of a diagonal of a square, what are the coordinates of the other two vertices? I got (2,3) and (-5,-4). But the other question was: What is the area of the square? How would you find this? Do you

38. ## Math

Three students came to the bake sale to shop. The sum of their ages is 33. The product of their ages is 1,320. How old are they?

39. ## physics

Posted by Anonymous on Tuesday, December 2, 2008 at 12:43am. A loudspeaker is placed between two observers who are 114 m apart, along the line connecting them. If one observer records a sound level of 61.6 dB and the other records a sound level of 81.3 dB,

40. ## Thermochemistry

I'm confused about the difference between the q in q=mc(Tf-Ti) and (Delta)H, or enthalpy. What exactly does enthalpy mean and how is that different than q? (I'm also confused about what Gibbs Free Energy actually means; I know that if it's negative, the

41. ## algebra

Solve using distributive property (Show all Work) 15-3y=y+13+y

42. ## French

Can someone check my paragraph please? Merci! It's about Thanksgiving :) Mes vacances sont passées assez ennuyeuses, alors j'ai inventé des nouvelles vacances! Le mercredi dernier, j'étais rentrée à la maison quand mes parents ont dit que nous allons

A Lesson Before Dying- Quotations Analysis. " I had gone to barbershops;I had stood on street corners, and i had gone to many suppers in the quarter.But i had never really listened to what was being said.Then i began to listen, to listen closely to how

why did the religons of buddhism and christianity spread when and as it did in africa during 300 bce?

45. ## Finance-options

I need help on the following question. Suppose that you are the manager and sole owner of ahighly leveraged company. All the debt will mature in one year. If at that time the value of the company is greater than the face value of the debt, you will pay off

46. ## chemistry

Rank from decreasing to increasing the effect the functional groups have on the melting point of compound x: -OH or -COOH i think its COOH

47. ## significant figures

how do i make 1020 to 2 sig figs? it cant round to 1100..

Hey, I finished my math homework, and im not so sure i did it correct, so can someone do this question and i will look at the answer to see if my work was correct this is State and Justification Given : m

49. ## chemistry

three questions please: (1) What kinds of evidence can you use to determine if a chemical reaction has occurred? (2) How do the properties of the cooked egg differ from the properties of a raw egg? (3) how are the endothermic and exothermic reactions the

50. ## HISTORY!!!

I have this test tomorrow and i have yo do this study guide and i don't no two of the questions... they are... what did the progressives support and what dod they oppose in the progressive era?!? three things for what they supported and one thing for what

51. ## spanish

I need help.. i need to make 4 sentences.. With... (Miro) (Miramos) El, la, al, a la empleado video carpeta profesora I don't care how u make them i just need help..

52. ## Spanish

Can you please see if this is correctly written in Spanish? If not, may you please provide suggestions on how I can fix it. Thank you very much. Éstas son tres cosas necesarias para mantener una vida sana: Recomiendo que tengas un hábito alimenticio

53. ## graphing lines in the form

graph linear equation 3x-6y-9=0

54. ## french

Bonjour Mme! Pouvez-vous correcter mon paragraghe pour moi? En anglais, it's supposed to say: We looked for a stocking, but we couldn't find a spare, so we ended up stuffing Santa's red underwear! Nous cherchons pour un bas, mais nous ne trouvons pas un

55. ## physics

The pressure in a constant-volume gas thermometer is 0.700atm at 100 deg. Celsius and 0.512atm at 0 deg. Celsius. a) What is the temperature when the pressure is 0.0550atm? b)What is the pressure at 500 deg. Celsius?

56. ## calculus

The problem asks: A curve i nthe plane is defined parametrically by the equation x = t^3 + t and y = t^4 + 2t^2. An equation of the line tangent to the cerve at t = 1 is...? please help. thanks!

57. ## 3rd grade social studies

1. What are the geographical (physical) features of Mexico? 2. Compare life for the Aztecs before and after the Spanish conquest. Thank you.

58. ## Biology

what enzyme do bacteria se to break down starches? List the three protozoan kingdoms. Which of thse kingdomsdo the slime molds belong to? what is the unique mode of reproduction that is characteristic of the scyphozoans?

59. ## ap world history

are there substantial similarites between the orgins and the devolpment of the silk road and trans-saharan trade?

60. ## Education

What are the implications on NCLB on teachers; on students in the classroom; and on schools and school districts?

61. ## Physics

A 2569 kg van runs into the back of a 827 kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road can be negligible, find the initial speed of the van.

62. ## spelling

I need some words that start with a silent consanent.(I'm not sure this is how you spell it)

63. ## 6th grade Social Studies

Describe what you think are some of the positive and negative issues related to political action committees and interests groups.

64. ## Algebra

The question is: find the value of 500 dollars after 4 years invested at an annual interest rate of 9 percent (compounded continuously). I got 716.66. Is this correct? Thanks for your help!

65. ## Amir

Please list the different types of venom that snakes give.

66. ## ANATOMY

WHICH OF THE FOLLOWING ORGANS REGULATES INSULIN IN THE BODY? A. LIVER B. LYMPH GLANDS C. PANCREAS D. THYROID GLAND

67. ## Chemistry

what are the order intermolecular forces according to strength??

how do I write the time in three different ways for 3:50

69. ## i need help please!!

Suppose that you let the masses m1 and m2 slide (without adding the third mass). a) What is the acceleration of the mass 25g? Hint: identify the force that produces the motion and the one that opposses and write the equation for the net force. b) What is

70. ## calculus

Let f and g be differentiable everywhere. If g is the inverse of f and g(-2)=5 and f'(5)=-1/2, then g'(2)=? PLEASE HELP! Thanks

71. ## algebra

Find a linear equation in the form P = mt + b (y = mx + b), which gives the population, P, t years from 2010. This is based off of an initial population of 6,000 in 2010, with a growth of 200 ppl per year. Please show work

72. ## Math

Describe a simple process for using rates and unit prices that might help someone who is having difficulty understanding these concepts? I do not understand what this is asking, can someone explain what it is wanting?

73. ## evironmental Science

describes environmental benefits and challenges of urbanization.

74. ## LSU

A can of black olives has a diameter of 8 centimeters and height of 20 cm. If the can contains 15 olives, each approximately 2 cubic cm, then what is the approximate volume of the liquid filling the can?

75. ## LSU

How many 3 cm cubes will fit into a 1m cube?

76. ## Algebra

solve using distributive property (show all work) 3w-1-4w=4-2w

77. ## Accounting

How does the cost system work?

78. ## Education

Standards-based education can sometimes put pressure on teacher to be sure they 'measure-up' to the expectations of state standards. How can teacher accountability have a positive and a negative influence on the classroom environment? Respond to

79. ## chemistry

If H2SO4 were added to the following, would it form a salt, if so what is the name of the salt? NaCl Ca(OH)2 Hf AlCl3 H2O Mg(OH)2

80. ## Science

I can be three different states of matter, but not at the same time. I am necessary for life, but i can also destroy life. I can be under your feet, around your body, or over your head. What am I?

82. ## LSU

Determine the surface area of a cylinder whose height is 2m and whose base has an area of 9 pi m square?

83. ## Math

Hi, I need help understanding how to find the product: (2 1/3)*(3 1/5) Multiplication and division with mixed numbers and use the reciprocal to divide and then reduce.

84. ## Chemistry

Why do ions form?

85. ## Calculus

series: n=1 to n=inf of 6/(n^3-4) convergent or divergent?

86. ## chemistry

What is formed when Na2S is added to a beaker containing amonnia solution?

87. ## muscular energy

what is the definition of muscular energy

88. ## 3rd grade social studies

american indians met european explorers and shown them what?

89. ## grammar

In this sentence, is summer a noun even though it is a direct object? Go during the summer.

90. ## physics

A bicycle with wheels of 70.0 cm diameter is going at a speed of 12.0 m/s.How fast is a point on the rim at the top of one of the wheels moving relative to the ground?

91. ## Algebra

Solve using distributive property (Shaow all Work) 8t-4+3(y+7)=6y-3(y-3)

92. ## Spanish

Please see if this is correctly written. If there are any mistakes, please feel free to correct me. Thank you for your time. Éstas son tres cosas necesarias para mantener una vida sana: Recomiendo que tengas un hábito alimenticio equilibrado o nutritivo.

93. ## Calculus

How do you integrate square root of (4-x^2) ? Pleasee help!

94. ## Math

What is the slope 5x+3y=3 3x+5y=7 is it -5/3 and 3/5 ?

95. ## Math

How do I solve this: ((5m^3)(3m^-1)^3)/((9n^2)(4n^-1))?

96. ## physics-HELP

Suppose that you let the masses m1 and m2 slide (without adding the third mass). a. what is the acceleration of the mass 25g? Hint: Identify the force that produces the motion and the one that opposes and write the equation for the net force. b. what is

97. ## poetry

ok so im supposed to create a poem about child abuse...and i have some good ones but i totally just got writers block and i need help..here is part of the poem, any suggestions MY PAIN it started with a pen and paper... i write my emotions without thinking

98. ## Algebra mat/116 appendix d

Complete the table for this equation. x y (x,y) -1 -2 -4 -4 8

99. ## ap world history

why did buddhism and christianity spread when ans as it did in 300 bce to 1000 ce?

100. ## fluid mechanics

The ares rocket has a liquid oxygen tank that sits on top of the core stage. The turbopump inlet for the engines on the core stage must have a certain pressure to operate correctly. The engine designer has asked you to calculate the range of pressures he

101. ## Finance

If a company does not do better than its competitiors but the stock market goes up, executives do very well from their stock options. Discuss this statement.

Draw two squares of appropriate size to compare the areas of Alaska (591,004 miles squared) and Texas (266,807 miles squared). * I don't get how to set up and do this problem.

I am a location in space. it takes only one letter to name me.

105. ## health

What are the five stages of a human's life cycle?

can you unscramble the word bavrilea

107. ## chem-intermolec forces

are covalent bonds broken when.... melt benzene melt quartz boiling C2H5OH evaporating water disolving bromine in water?

108. ## Math - please elaborate

can someone please further explain my question on? it's just a farther bit down. The subject is "Math - help really needed" I think I almost got the answer, but I'm not sure where to go from there. really appreaite all the help so far as well; thank you.

109. ## english

can someone tell me what the living conditions of Shakespeare's times were like

110. ## college

I am looking for a poem " I am What I am", I need help critiquing this poem.

111. ## Physics

The velocity of a 629-kg auto is changed from 10.0 m/s to 44.0 m/s in 70.0 s by an external, constant force. (a) What is the resulting change in momentum of the car? (b) What is the magnitude of the force?

112. ## Calculus

How do I prove that the series ln(n)/(3n) is divergent?

113. ## Chemistry

how do i tell if something can dissolve into another the question is which f these solvents will dissolve salt, NaCl?

114. ## Algebra

I am supposed to find how long it takes for an investment to double at an annual interest rate of 8.5%, compounded continuously. I know that e is supposed to turn into ln when you try to divide by t (or at least, I think), but how do you do this? Could

115. ## math

4.5x(1.25x+130)=3x-115 find the value of x and show the steps

116. ## check math

Find an euation of the line having the given slope and contaning the given point. m=4 over 5. (6,-7) i got y=4 over 5 - 28 over 5 for the answear

117. ## Math - help really needed

I'm sorry to double post; I don't want to seem impatient, but I really need help with this. Prove each idenity. 1+1/tan^2x=1/sin^2x 1/cosx-cosx=sinxtanx 1/sin^2x+1/cos^2x=1/sin^2xcos^2x 1/1-cos^2x+/1+cosx=2/sin^2x and (1-cos^2x)(1+1/tan^2x)= 1 I haven't

118. ## Environemtal science

I need help explaining the four factors that produce changes in poplution and what could happen to the nutria population after all the land is depleted of the nutrias' food resources?

119. ## English

What are some words that have been added to our language since people began to travel into space???

120. ## GEOGRAPHY

in what state are the Everglades located? What is the northernmost place on Earth called?

121. ## calculus

integrate: square root of (4-x^2)

what percent of 60 is 15

123. ## Computers

An Excel workbook can contain more than one worksheet. Give two examples of a spreadsheet application where it would be necessary to have more than one worksheet and explain your answer.

124. ## Social Studies

Where did the Egyptians go to expand their buisness?

125. ## Visual Arts

I am finding a site so I can learn advanced three-point perspective methods. Can you help me?

126. ## history project

Is their any valuable websites about anne franks life.

127. ## lit

the best in this kind are but shadows is

128. ## government

last question why might bureaucrats choose willingly to do things other than what they might want?

129. ## LSU

How many 2 inch cubes will it take to make a rectangular prism that is 8 inches by 10 inches, by 14 inches?

130. ## Math - help really needed

Prove each idenity. 1+1/tan^2x=1/sin^2x 1/cosx-cosx=sinxtanx 1/sin^2x+1/cos^2x=1/sin^2xcos^2x 1/1-cos^2x+/1+cosx=2/sin^2x and (1-cos^2x)(1+1/tan^2x)= 1 I haven't even gotten 'round to sny of the quedtions because the first one is just so hard. I'm not

131. ## name of the mpuntain in east

can any one help me about finding the name of mountain in east please. thanks.

for my physical science class were supposed to name ionic compounds and change the name into a formuala but i don't understand how to do it my teacher didn't explain it fully. Ex:Na2CO3= Sodium Carbonate Sodium phosphide=Na3+P-3

134. ## social studies

Need help with project. what are essential ideans that are included ina POLICY of imperialism relating to renaissance europe

135. ## 9th grade : Algebra

How would you work out this problem? 2x+5y=10

136. ## u.s.history

how many years was george bush in office?

3x^2 - 1/3 = ? please show steps

138. ## Physics

Suppose that you let the masses m1 and m2 slide (without adding the third mass). a) What is the acceleration of the mass 25g? Hint: identify the force that produces the motion and the one that opposses and write the equation for the net force. b) What is

139. ## government

what do believe are the most important expressed powers that the president has?

140. ## government

How can the president control bureaucrats? how can congress control them?

141. ## LSU

What happens to the volume of a right circular cylinder if you double its diameter?

142. ## Accounting

How and why variances are used?

143. ## Math

if shirt's are sold 3 for \$50 how much would it cost if you bought 14 shirts?

144. ## science

Is cell biology directly related to technology????

145. ## Math

0.03 need to put it into a decimal fraction

146. ## government

how does an iron triangle differ from an issue network?

147. ## health

What is a major "breakthrough" that contributed to a more scientific understanding of disease causation

148. ## Math Check

find an equation of the line contaning the given pair of points. (2,4) and (6,5) is this correct i got y=1 over 4x + 2

149. ## Math (Check)

Find an equation of the line containing the given pair of points (2,1) and (6,3) Is this the right answear? y=(1/5x)-(3/5)

150. ## 1301 Education

The meaning of 3 S to a T

3 4 ×8y-4

152. ## English

Virgil is not afraid to trade on the rather extreme level of the Purdy's ignorance? Why does he do so and what does he expect to gain? I don't understand this question. Anyone care to explain. Thank you