# Questions Asked onMarch 30, 2009

1. ## Chemistry

A galvanic cell is based on the following half-reactions at 25C: Ag+ + e- --> Ag H2O2 + 2H+ + 2e- ---> 2H2O (not H2O2) Predict whether E_cell is larger or smaller than E°_cell for the following case. [Ag+]= 1.0M, [H2O2]= 2.0 M, [H+]=2.0M

2. ## CHEM..URGENT!

What is produced at each electrode in the electrolysis of NaBr(aq) and AgF(aq)?

3. ## math

Books Never Written?

4. ## PreCalculus

Problem: Identify the conic from the equation 13x^2-6(sq.rt.6)xy+7y^2-16=0 I have to choose from the following four answers: hyperbola (angle of rotation 45) hyperbla (angle of rotation 60) ellipse (angle of rotation 90) ellipse (angle of rotation 30) I

5. ## Pre-Calc

Establish the identity. sinx + cosx/sinx - cosx = 1+2sinxcosx/2sin^2x-1

6. ## Spanish #2

Can someone please check my work? Julián describes his family/. Complete the paragraph using possessive adjectives/. La hijas de mi tía son (mis) primas. Una se llama Noemí y (sus) hermanas se llaman Rosario y Débora. (Nuestras) madres son hermanas.

7. ## chemistry

For the reaction that occurs in the voltaic cell, Fe(s)|Fe2+(aq)||Cr3+(aq), Cr2+(aq)|Pt(s) determine E°cell. I don't understand how the Pt(s) would be used to solve this question. Please help!

8. ## Calculus

This is the question - you are designing a rectangular poster to contain 256 in^2 of printing with a 3 " margin at the top & bottom and a 2 " margin at each side. What overall dinmensions will minimize the amount of paper used? Round to the nearest whole

9. ## Religion

What movie(s) could one show illustrating the Moral Development Theory by Lawrence Kohlberg?

10. ## math

A coffee shop sells a ceramic refill mug for \$8.95. Each refill costs \$1.50. Last month Rose spent \$26.95 on a mug and refills. How many refills did she buy? THIS IS AN EQUATION

12. ## social studies

what was some of the point of view on slavery back in the 1850s?

13. ## Math

A farmer grows only sunflowers and flax on his 240-acre farm. This year he wants to plant 80 more acres of sunflowers than that of flax. How many acres of each crop does the farmer need to plant?

14. ## Chemistry

Calculate the value of the solubility product (Ksp) for CdS given the following standard reduction potentials: CdS + 2e- --> Cd + S-2 E° = -1.21V Cd+2 + 2e- --> Cd E° = -0.402V --------------------------------------- CdS + Cd --> Cd + Cd+2 + S-2 E° =

15. ## Pre Cal.--Check my work?

Solve the system of equations: x - y - z = 2; x + 2y - 2z = 3; 3x - 2y - 4z = 5? well, you have: 1- x-y-z=2 2- x+2y-2z=3 3- 3x-2y-4z=5 multiply both sides of the equation 1 by 2: x-y-z=2 ===> 2x-2y-2z=4 add this by equation 2: 2x-2y-2z=4 x+2y-2z=3 ==> 3x -

16. ## calculus

Could someone help me et up this problem? Two people start from the same point. one walks east at 3mi/h and the other walks northeast at 2mi/h. How fast is the distance between the poeple changing after 15 minutes? I think this is what I would do::: First

17. ## Science

what does the geologic time scale indicate about the change in life-forms over time?

18. ## Algebra 2, Grade 10

How do you solve 4x^8-61x^4+225????

19. ## Spanish

Please help me translate. Dear Juan, If you do not want your girlfriend to leave, you need to listen to me carefully. You were wrong. In a relationship, no matter the situation, the guy is always wrong. Be a man and tell her you made a mistake. I am sure

20. ## Calculus

Here's one more that I do not understand A company estimates that the cost (\$) of producing x units of a certain product is given by: C= 800 + .04x + .0002x^2 Find the production level that minimizes the average cost per unit. Thank you so much

21. ## Economics (attempted as suggested by economyst)

Posted by eStone on Sunday, March 29, 2009 at 5:47pm. Suppose that a firm is currently employing 30 workers, the only variable input, at a wage rate of \$60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed

22. ## Cal Word Problem

Use a(t)= -9.8 meters per secondas the acceleration due to gravity.(Neglect air resistance) The Grand Canyon is 1800 meters deep at its deepest point. A rock is dropped from the rim above this point. Write the height f the rock as a function of the time t

23. ## Mass-mass

How many grams of hydrogen gas are produced when 50.0 grams of zinc react with phosphoric acid, H3PO4 ? Equation:3 Zn +2 H3PO4--->3 H2+ Zn3(PO4)2

24. ## social studies

lession 1 north and south grow apart whao I have to do is compare and contrast. I have some of it done but I can't fine what is the similar and different?With the way of lift in the 1850. point of view on tariffs in imported good. And point of view on the

25. ## Chemistry

When a sample is above critical temperature and above critical pressure, it is a supercritical fluid. What happens when a sample is above critical temperature but below critical pressure? What phase is that? What happens when a sample is above critical

26. ## Literature

A few more questions on Antigone; Can someone please check my answers?: 1. When Ismene and Antigone disagree in the first scene, Ismene says "You are unwise but a loyal friend indeed to those who love you." Is it an accurate picture of Antigone? Why or why

[mole-mole] How many moles of NaOH are needed to react with 5.0 moles of sulfuric acid, H2SO4??? Equation: H2SO4 + 2 NaOH ---> Na2 SO4 +2 H2 O

28. ## Sra

Are you going to be on for a lil bit more? Around 1-2 hours now from this post? I really need help with some french, but I have to do some other homework first. I'll check on your reply in a bit. Merci beacoupe.

29. ## us history

what factor encouraged an american policy of neutrality during the 1930's?

30. ## science

what type of spectrum does the sun emit? where does nuclear fusion in the sun occur? if a star begins its evolution with 10 times the mass of the sun, but ends up with 2 times the mass of the sun, what type of object does it form?

31. ## Physics

Find the energy necessary to put 5kg , initially at rest on Earth's surface, into geosynchronous orbit. Do I use the formula U=GMm/r G=6.67*10^-11 M=2.5*10^24 m=5 r=41000 Is this sort of right, any help would be greatly appreciated. Do i have to add the

67.6g of h2O

33. ## Biology

Compared with a smaller cell, a larger cell of the same shape has a. the same surface-to-volume ratio. b. a smaller cytoplasm-to-nucleus ratio. c. less surface area. d. a smaller average distance between its mitochondria and the nucleus. e. less surface

asked by Cell size and shape
34. ## social studies

louisiana purchase

35. ## Algebra

Explain how you would determine whether the graph of y = x^4 represents an exponential function. What is an exponential function? Thank you! :-)

36. ## Econ

In which of the following circumstances would a buyer be indifferent about buying a good? a. The amount of consumer surplus the buyer would experience as a result of buying the good is zero. b. The price of the good is equal to the buyer's willingness to

37. ## Chemistry

A student carried out the synthesis of aspirin, starting with 3.22 g of salicylic acid. After carrying out the reaction, recrystallizing and then drying the product, the student obtained 3.65 g of aspirin. Calculate the percent yield. I'm pretty sure it's

38. ## Math

There 1170 students in a school. The ration of girls to boys is 23:22. The system below describes relatioonships between the number of girls and the number of boys. g+b=1170 g/b=23/22 a. what's the proportion for g when you solve it? b. how do you solve

39. ## poem

limeric There once was a boy named Timmy. His brothers were all named Jimmy. They all got confused. This name was misused. They all ganged up and beat Timmy. Is it right poem for limeric check my spelling too thanks.

40. ## Physics

Find the energy necessary to put 5kg , initially at rest on Earth's surface, into geosynchronous orbit. Do I use the formula U=GMm/r G=6.67*10^-11 M=2.5*10^24 m=5 r=41000 Is this sort of right, any help would be greatly appreciated.

anagram

42. ## math

-9xy-xy+7y-6y= -10xy+y

43. ## Spanish

I am trying tos ay In general there is nothing wrong with trying to look young. Understanding that you must look young with class understanding your age. There is no reason to hurt yourself just to feel young. You are only as young as you feel I think.

44. ## Stoichiometry

[Volume-Volume].How many liters of HF gas will be produced when 30.0 liters of hydrogen reacts ? Equation:h2+f2--->2HF i need help

45. ## Science

How would you test for Carbon Dioxide?

46. ## Chemistry

What does a high ENC indicate if we are comparing two compounds for example Csl and CaCl2? To caculate the ENC we simply take the number of valence electrons of the two compounds? Please help

47. ## alg 1

factor 3x^2y-9xy^2

48. ## Physics

A force of 240.0 N causes an object to accelerate at 3.2 m/s^2. What is the mass of the object? 0.013 kg 75 kg 240 kg 786 kg

49. ## Electromagnetism

**define any of the following** 1.magnet 2.poles 3.magnetic force 4.electromagnetism 5.solenoid 6.electromagnet 7.electric motor 8.electromagnetic induction 9.generator 10.transformer

50. ## calculus

I need help with this problem. I think I figured out how to set it up but I keep getting stuck in the middle. A boat is pulled into a dock by a rope attatched to the bow of the boat and passing through a pulley on the dock that is 1m higher than the bow of

You know how to solve quadratic equations using algebra, graphs and the quadratic formula. Sometimes one method of solving is more convenient than another method. Describe how you would solve each equation. Give reasons for you answers. A) 16x^2 = 1600 B)

52. ## Chem

what are the four quantum numbers of the last electron of As this is what i have n=4 l=1 ms= 1/2 i don't know how to calculate ml. I know it's either: -1,0,1

Calculate the number of grams in the following :[149.096 g/mole] 8.55 moles of (NH4)3PO4 IT WOULD BE NICE IF I CAN GET STEP BY STEPS TO GET ANSWER !!!

54. ## Biology

Suppose that during meiosis I, the paternal chromosomes always went to one pole and the maternal chromosomes always went to the other pole. How would this affect the genetic variability of the offspring? Would children tend to look more like the parents?

55. ## CHemistry

Research the role of chemistry within a specific industry. Identify chemical processes upon which the industry relies. Explore environmental impacts of the industry that are related either to the chemicals it uses or produces. Procedure Choose one of the

Write a business letter of two to three paragraphs based on the scenario described here. Write an application letter in answer to the ad below. You may make up details but do not copy directly from sample letters in the study unit or any other source. Your

57. ## Socials Studies Project

Okay, I have to do a project on First Nations. The group I'm researching are the Northwest Coast People. It must include: Lifestyle (clothes, food and its preparation, types of housing, transportation, agriculture, nomadic, hunters, fisherman?) Customs and

58. ## Julius Caesar

What is Cinna's connection to Brutus in the play? I understand his role in the story, I just don't get how he connects to Brutus. Thank you for explaining this.

60. ## us

hi i have to write a paper stating that malcolm x was a better leader than martin luther king jr. I need a lot of help

61. ## Math

I am having problems understanding how to solve problems like the following: a2 + b2 = c2 Please help me where I can understand solving problems such as the one above.

62. ## science someone help me pleaz!!!!!!!!

if a white dwarf can exist only if its mass is less than 1.4 times the sun's mass, how can a star having 5 times the sun's mass end as a white dwarf? & what can astronomers learn about a star from its spectral lines?

63. ## Science

how did geologists determine the divisions of the geologic time scale?

64. ## Chemistry

A 67gr mass of solid iron is heated by a flame until the temp of the iron equals the temp of the flame. The solid iron is then dropped into 250gr of liquid water at 26 degrees C. After 5 mins, the iron and the water are both at 47 degrees C. Specific heat:

1) A firefighter aims a hose at a window 25 ft. above the ground. The equation h = -0.01d^2 + 1.06d + 5 models the path of the water, when h equals height in feet. Estimate, to the nearest foot, the horizontal distance d in feet btween the firefighter and

66. ## Math

For this system, is the ordered pair a solution of both equations?How do you know? (5,1) y=-x+4 y=x-6

67. ## english

please help me tell which of the following would be better as a thesis statement for a rescreach paper " Poverty". addtional suggestion will be appreciated. thank you!!! - Poverty is affecting thousands of Americans everyday, it isn't sparing anyone of a

68. ## English

I am currently reading Jack London's short story "To Build a Fire." On my study guide, I was asked "What is the one important element beside matches that the man needs to build a fire?" I would say oxygen, but I don't think this is it, because the book

69. ## Chemistry

Do a cation of Mg^+2 and an anion of CO3^-2 become Mg(CO)3 or magnesium carbonite? What about (NH4)2 SO4. What cation and anion does that become? I'm not seeing why SO would get 4 if it already has that to begin with. Thank you!

70. ## Dr.Bob22

Can you please verify the anwer I gave robb under his chemistry post called "mass-mass". I probably did something wrong.

71. ## Physics

The escape speed from a planet of mass 2.5×10^24 is 7.0 km/s.What is the planet's radius? Iam using the formula v=sqr(2GM/r) v=7 G=6.67*10^-11 M=2.5*10^24 r=? I get 6.8*10^12 Where did I go wrong?

72. ## art survey

describle the values of studing the visual and performing arts.

73. ## statistics

Listed below are the number of homeruns for the National League leader over the last 20 years, through 2006. Assuming that number of homeruns is normally distributed, if this is sample data collected from a population of all past and future homerun

74. ## vocabulary

Whats an word for everyday language? not english. a vocab term

75. ## Calculus

There was a typo in last question A company estimates that the cost (\$) of producing x units of a certain product is given by: C= 800 + .04x + .002x^2 Find the production level that minimizes the average cost per unit.

76. ## science

does the doppler shift provide complete information about the motion of a star? pleazzz help

77. ## chemistry

Describe what happens to the shape and volume of a solid, a liquid, and a gas when you place each into separate, closed containers?

78. ## science

if a white dwarf can exist only if its mass is less than 1.4 times the sun's mass, how can a star having 5 times the sun's mass end as a white dwarf? & what can astronomers learn about a star from its spectral lines?

79. ## spelling

Fill in the blanks with nouns: adm_r_l , sq_ _rr_l , _l_v_t_r

Carmen received some money for her birthday on Friday. That night, she took her friend out to dinner. She spent half of her check for dinner. Then she tipped the waiter \$6. The next evening she went to dinner alone, she spent half of the money she had

81. ## english

i need help with making an analogy! i just don't know how to do one like is seed is to water as plant is to flower one ? but i need a different one then that one help please!!!!!!!

82. ## Speech/english

ok my topic is If you could do anything without getting in trouble what would it be. we have to write an introduction first then thesis for my introduction i keep confusing that with the body i think i'm a little confused with what that should be about but

83. ## Help with Translation

Please help me translate this short letter. Dear Juan, If you do not want your girlfriend to leave, you need to listen to me carefully. You were wrong. In a relationship, no matter the situation, the guy is always wrong. Be a man and tell her you made a

84. ## Physics

In order to handle a hot pizza of mass 1.0 kg, a cook slides a light (i.e., of negligible mass) but stiff spatula of length 2.0 m from the right hand to the center of the pizza, which he then carries horizontally with both hands. His right hand is at one

85. ## math

how do u find unit rates and how would u round it to the nearest hundreth is it is necessary???

Thanks for the websites still a little confused on what animals would be considered a renewable resource?

87. ## History

This is what I have so far but I need to add more any ideas would be great. Thanks. (How does overpopulation cause epidemics) THe more people that one comes in contact with each day, the more chances there are to pass on or receive a contagious disease.

88. ## Econ

A result of welfare economics is that the equilibrium price of a product is considered to be the best price because it a. maximizes total revenue for firms and maximizes the quantity supplied of the product. b. maximizes the combined welfare of buyers and

89. ## math

if the rate for radioactive decay for a substance is r=-.0063 and time is being measured in days how do you find the half-life of the substance to the nearest hour?

90. ## Solving inequalities

I have to solve the following inequalities: x^2 + y^2 is less than or equal to 49 y is less than or equal to 3-x^2 I know that these are the equations of a circle and a parable. There should be 3 solutions. However, I am not sure how to solve these

91. ## physics

A straight ladder is leaning against the wall of a house. The ladder has rails 4.50 m long, joined by rungs 4.800 m long. Its bottom end is on solid but sloping ground so that the top of the ladder is 3.400 m to the left of where it should be, and the

92. ## math

how would you prove that (cos^2x-sin^2x)(1-cos^2xsin^2x)= (cos^6-sin^6)?

93. ## Chemistry

Explain in detail, which of the following pairs would have a higher melting point NH3 or P4

94. ## science

if a white dwarf can exist only if its mass is less than 1.4 times the sun's mass, how can a star having 5 times the sun's mass end as a white dwarf? & what can astronomers learn about a star from its spectral lines?

find out how modern tegnology has proved new means by wich people may save money. P.S i really don't understand and this is part of a project that is due tomorrow ANd i really need the answer before 9:30 tonight... thank u

97. ## Algebra

Describe how an exponential function changes as the base increases. What is an "exponential function" and how would I find the answer? Thank you! :-)

Secret Pal Surprises Characters and Setting? It is for my book report. Please tell me the characters (behavioral description) and where's the setting.

99. ## Algebra

Explain how population and money earning interest can both be represented by the formula A = 1000(1.08)^t. I have no idea how to solve this problem or how to start! Thank you! :-)

100. ## math

There is a total of 37feet of lumber. You may use as much of this as you need. Your class has raised \$121.00 to buy sand. A bag of sand costs \$ 1.50. One bag will cover an area of one square foot. What is the largest sand-filled area you can make for the

how does the cycle of day and night of our earth work?

102. ## Literature

I had a couple of questions about Antigone. 1. Teiresias says to Creon that "A good man yields when he knows his course is wrong and repairs the evil." How does this apply to Creon? I think Creon does this in the end but I need a more detailed answer; I

103. ## 5th grade math problem

There is a total of 37feet of lumber? You may use as much of this as you need. Your class has raised \$121.00 to buy the sand. A bag of sand costs \$1.50. One bag will cover an area of one square foot. What is the largest sand-filled area you can make for

104. ## Math Challenge

Please help, even if you only know 1 answer. 1. The length of each side of rectangle R is an integer, and the area of R is 2009. What is the largest possible perimeter of R? 2. If i place all three operational symbols +, -, x, in all possible way into the

105. ## math/equations

1 -7=7d-8 2 24+h/4 =10 3 k/5 -13=4 4 -17+q/8=13 CAN ANYONE HELP!

Thanks so much for all of your help Ms.Sue.

107. ## science

why do carbonated drink errode the iron nail? thank you.

108. ## math

if a number is evenly divisible by 6, it is also evenly divisible by which other numbers?

109. ## Algebra

I need to simplify this. (2^-1 . 7^-4)^-2 I thought that 2 was suppose to be multiplied with the -1, but that doesn't seem to make sense so I am confused. I know that PEDMAS needs to be used, just don't know how to apply it. Any help is appreciated!

in the book " how to be cool in the third grade. Do you think Robbie was cool and why

111. ## Science!!

Hi!! Which sentence looks better? (Should the commas be there?): 1. Extra food that your body doesn’t need or can’t digest travels into your large intestine & is turned into waste & eliminated from your body. 2. Extra food, that your body doesn’t

112. ## Math

Factor (m + 4) (a – 5) + (m + 4) (a + 3) I cut it down to 2 possibilities. (m + 4) (2a – 2) (m + 4) (a2 – 2) Think it's this one

113. ## Math

20 cm equals how many mm?

114. ## Electronic Engineering

What are the advantages and disadvantages of using a cause register or vectored interrupts from a hardware point of view.

115. ## biology

what is the stages of mitosis?

116. ## banking

how would you receave interest on money if you keep it in a bank??????????

what is gu?

118. ## Algebra

Please simplify. 5x^-2 - 3y -1/ OVER x^-1 + y^-1

Ten years ago, I started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted me to office manager. I manage two employees: Jack Snyder and Ruth Disselkoen. My office provides secretarial support

120. ## sci 230

What is a Theory? and Fake Science ?

what is an 8th of an inch?

122. ## math

-8Xa squared b _________________________ -5Xa fifth power b

123. ## math

a fifth power b ____________________all in ()to -3 a seventh power b -2

124. ## math

3a2-9ab+4b2-7ab=

125. ## Math/Algebra

Does anyone know how to graph quadratic functions (with parabolas). Could someone please help me!!Could you help me with these two problems don't forget to make a chart for x, the equation, the y, and the coordinates. 1. Y=2x^2 2. Y=-5x^2

126. ## math{need HELP}

what is 5 pecent out of 5200?

127. ## Meaning

What does a quarantine area mean?

128. ## science

how do you find the wet bulb depression if they don't give any other info.

129. ## math

when question ask subtract (5y+8y+2) from (7y+9y-8) which expression comes first

130. ## algebra

I have tried to work these problem and seem to do it wrong.I need help. 3/4(5x-1/2)-5/3

131. ## math

what is 4% of \$300.00

132. ## English

What is a better of way of saying : for that reason in a more academic tone.

133. ## Language

we watched the eclipse from are backyard

Does anyone know if Aloe would be considered a renewable resource for aruba. Still having a hard time finding anymore ecspecially animals.

135. ## Calculus 1

Evaluate and compare Change in Y and Change in dy. Y = 1-2X^2

136. ## Challenge Problems - Math

Please help, even if you only know 1 answer. 1. The length of each side of rectangle R is an integer, and the area of R is 2009. What is the largest possible perimeter of R? 2. If i place all three operational symbols +, -, X in all possible way into the

the centre point of a circle is 5,3. the top most point of the circle is the vertex. the radius of the circle is 5 and one of the zeroes is 9. figure out the vertex. tehn figure out the equation and convert it in standard form? p.s-plz exaplain step to