# Questions Asked onApril 13, 2008

1. ## Physics

Water drives a waterwheel (or turbine) of radius 3.0m. The water enters at a speed of v1 = 7.0 m/s and leaves at a speed of v2= 3.0 m/s. A) if 150kg of water passes through per second, what is the rate at which the water delivers angular momentum to the

2. ## Atomic physics

1)What is the longest wavelength light capable of ionizing a hydrogen atom in the n = 6 state 2)a. Calculate the energy of the electron in the ground state of single ionized helium, which has an atomic number Z = 2. b. Calculate the radius of its

3. ## maths permutation & combination - answer pls check

Your password for a given website is made up of three letters followed by four numbers. Find the number of possible passwords if there are no restrictions on what three letters and what four numbers can be used. Pls check if my answer is correct 26C3*10C4

4. ## Physics

A 2.00 cm x 2.00 cm square loop of wire with resistance 1.30×10^−2 Ohms is parallel to a long straight wire. The near edge of the loop is 1.00 cm from the wire. The current in the wire is increasing at the rate of 110 A/s. What is the current in the

5. ## chem

If 25 grams of solid ice at-20 degrees C is heated to gaseous water at 125 degrees C, how much energy is required?

6. ## physics

It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.20 GPa). As one goes deeper and deeper in the ocean, the pressure increases by 1.0*10^4 Pa for every meter below the surface. If a diver goes down 33.0 m (a bit

7. ## Chemistry

A standard solution of FeSCN2+ is prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN. The equilibrium concentration of FeSCN2+ ([FeSCN2+]std) for this standard solution is assumed to be ____ M. I tried this problem by adding the

8. ## statistics

Scores on a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4. Estimate the probability that among 75 randomly selscted students, at least 20 of them score greater that 78.

9. ## Science

what conversion factor if used to convert 10 hours to seconds? (1hr/60min)=(60min/120sec)=(10hr/600min)=(600min/36000sec) answer= 36000 sec.

10. ## Atomic physics

1)Five possible transitions for a hydrogen atom are listed below: Select whether the atom gains or loses energy for each transition. a. Loses Gains ni = 6; nf = 4 Loses Gains ni = 4; nf = 2 Loses Gains ni = 5; nf = 3 Loses Gains ni = 2; nf = 5 Loses Gains

11. ## chem 203

Br2=2Br When 1.05 mol of br2 is placed in a .950L flask, 1.20% of Br2 undergoes dissociation. Calculate the equilibrium constant Kc, for this reaction. Use ICE table.

12. ## chem

20ml sample of .200M HBr is titrated w/ .200M NaOH. what is the ph after adding 15ml (base)?

13. ## Annuities

Vic French mad deposits of 5000 at the end of each quarter to book bank, which pays 8% intrest compounded quarterly. After 3 years, Victor made no more deposits. What will be the balance in the account 2 years after the last deposit? I do not understand

14. ## Physics

the volume of a cuboid is the product of its length, breadth, and height. give a possible metric unit for the volume. is the unit for volume a basic unit or a derived unit? m^3. it is a basic unit is this correct?

15. ## algebra

Solution A is 25% acid and Solution B is 40% acid. How much of each is needed to make 60 liters of a solution that is 30% acid?

16. ## literature/poetry

1. If this be error and upon me proved, I never writ, nor no man ever loved. These lines are an example of a/an A. quatrain. B. octet. C. couplet. D. sestet. 2. The line "I wandered lonely as a cloud" is an example of A. a metaphor. B. a simile. C. a

17. ## physics

5)a. Electrons accelerated by a potential difference of 12.23 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the longest possible wavelength. b. Calculate the wavelength of light emitted with the

18. ## Physics

2)Identify the initial and final states if an electron in hydrogen emits a photon with a wavelength of 1282.0 nm. Enter the initial state first

19. ## algebra

suppose you invest 17000 at an annual interest rate of 3.9% compounded continuously? how much will u have in the account after 2.5 years?

20. ## Physics

I was having trouble with two different physics problems when studying for a test. Any help is appreciated. 1.) A 11.6-kg block of ice has a temperature of -14.5 °C. The pressure is one atmosphere. The block absorbs 6.87 x 106 J of heat. What is the final

21. ## college algebra

Could you help me with this long division problem of a polynomial? 18x4+9x3+3x2/3x2+1

22. ## English

Amelia Earharts "philosophy of life"???

23. ## Physics

You need to make a 100 microH inductor on a cylinder that is 5.0 cm long and 1.0 cm in diameter. You plan to wrap four layers of wire around the cylinder. What diameter wire should you use if the coils are tightly wound with no space between them? The wire

24. ## algebra 1

A picture that measures 7 inches by 7 inches is being framed. The area of the frame is 32 square inches. What is the width of the frame?

25. ## history

The great French historian Jules Michelet (1798-1874) sympathized with the French Middle Ages and with the Revolutionary epoch in France, yet he wrote his best work on the despotic French monarchy, which he despised. 5) The statement above, if true, would

26. ## critical thinking

In 1976 a powerful earthquake hit the city of Tangshan, China. Scientists had failed to predict the earthquake. If people had paid attention to the unusual animal behavior that preceded the earthquake, however, they would have known it was coming. Animals

27. ## 12 Biology--THIS IS URGENT

In relation to a work sheet on translation and transcription: If you worked backward, starting with the amino acid sequence of the protein, would you obtain the same DNA nucleotide sequence? Why or why not? THANKS!!!

28. ## Science

What can you say about the motion of a body if: a. its displacement-time graph is a straight line inclined with the time axis b. its velocity-time graph is a straight line inclined with the same axis. c. its velocity- time graph is a parabola A)the

29. ## Physics

I was having trouble with two different physics problems when studying for a test. Any help is appreciated. 1.) A 11.6-kg block of ice has a temperature of -14.5 °C. The pressure is one atmosphere. The block absorbs 6.87 x 106 J of heat. What is the final

30. ## algebra

solve 7^5x=23. round to the nearest ten-thousandth also solve in (4x +5)=4 round to the nearest thousandth

31. ## Physics

Given: Two particles are created in a high-energy accelerator and move off in opposite directions. The speed of one particle, as measured in the laboratory, is 0.580c, and the speed of each particle relative to the other is 0.920c. Problem:What is the

32. ## chemistry

Hi I sent this question a few days ago but did not get it answered I think it may have been mixed up in the jumble. Purpose: The purpose of this lab exercise is to construct a table of relative strengths of oxidizing and reducing agents. By completing this

33. ## philosophy

For some philosophers, writing is an unfortunate necessity, a means of communication that is at best irrelevant to the philosophical thought it expresses and at worst a barrier to that thought. The words in which the philosophical investigator writes up

34. ## environmental science

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

35. ## physics

First off, thanks a lot for your help. Secondly, will you do it again? A bicyclist traveling with speed v = 3.2m/s on a flat toad is making a turn with radius r = 2.8 m. The forces acting on the cyclist and cycle are the normal force (N) and friction force

36. ## Math (trigonometry)

Trigonometry identities are so hard... I need some help proving these identities: *Oh, and I'm only in grade 11, so the identities we use are quotient identity and Pythagorean identity. sinx/(sinx + cosx) = tanx/(1 + tanx) cos^2x - sin^2x = 2cos^2x - 1

37. ## Math(trigonometry)

Data: á = 32 degrees, side a = 2.5 feet and side b = 4 feet 1. Identify the swinging side and the fixed side in a possible triangle. 2. Compute the length of the shortest swinging side that will construct a triangle containing the data. (compute the

38. ## writing

Hi I'm writing a research proposal and I'm not sure if my thesis is specific enough or needs improvement. Thesis: Currently in Afghanistan, the lack of an effective method of regulation of the production of the opium poppy continues to obstruct

39. ## English (opinion)

What actor or actress would portray Amelia Earhart in a movie of her life story??? Why??

40. ## >science/research<

hi i need a few websites where i can find information that can help me prove that the animals that existed in the past were far more dangerous anddifferent than the animals of today

41. ## microbiology 2

molecular chronometers are used to determine the course of evolution.why, even with this "tool", is evolution still so complex?

42. ## Physics

I have to make up my own standardized questions for a project, and I wanted to make sure I did my math right. Can someone please check it? Thanks!! If your mass was 60 kg, the earth’s mass was 6×10^24 kg, the radius of the earth was 6.4×10^6 meters,

43. ## critical thinking

Which of the following, if true, provides the strongest support for an archaeologist’s conclusion that a particular stretch of ancient stone-paved road was part of the Inca road system?

44. ## Chemistry

Liquid Chromatography lab: Why is it important that the solvent level not drop below the upper level of the stationary phase once the stationary phase is packed in the column. is it because if the stationary phase dries out, then the mixture will be

45. ## Continued physics problem from before (way down)

Posted by Eileen on Sunday, April 13, 2008 at 10:05am. I am trying to do these 2 problems. I'm starting out with the RC Circuit (2nd one): h t t p ://img201.imageshack.us/my.php?image=circuit5ij7.png *delete spaces or link won't load! a) The capacitor acts

46. ## Physics

Took a leaf out of Eileen's book for the picture corresponding to the problem (you have to delete the spaces in 'h t t p :'): h t t p ://img444.imageshack.us/img444/1057/circuit6pk4.png In the circuit that is in the link above, the switch S is initially in

47. ## environmental science

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

48. ## Geometry

Can someone tell me how to solve these proportions? Thank you 5 7 ---- ----- = x - 1 x

is Gandhi a political activist???

50. ## English

Hi, can someone proofread this and let me know if there are any grammatical mistake. I'll appreciate it. Thanks. This experiment was preformed to determine if Drosophila fruit flies inherit apterous (ap) or a wild type (+/+) phenotypes. The wild type is

51. ## economics

IF I have a perfectly elastic supply (horizontal), and the unit price of cigarettes goes up by increasing cigarette tax from 8 cents to \$1.50, I know the quantity demanded goes down, but what happens in the long term (specifically in regards to tax

52. ## science

Why is the mechanical advantage of an inclined plane less than 1

53. ## art

what can I compare and contrast about arthur boyd

54. ## chemistry

Hi I sent this question a few days ago but did not get it answered I think it may have been mixed up in the jumble. Purpose: The purpose of this lab exercise is to construct a table of relative strengths of oxidizing and reducing agents. By completing this

55. ## Circuit Problem- Physics

I am trying to do these 2 problems. I'm starting out with the RC Circuit (2nd one): h t t p ://img201.imageshack.us/my.php?image=circuit5ij7.png *delete spaces or link won't load! a) The capacitor acts as a bare wire with no resistance, so: I=V/R=V/(4/5R)

Please, somebody help me. I need 3 traits on Robert Frost's writing and I'm clueless. I don't even like his poems, and I'm supposed to write a 3-paragraph paper on him. So far, I'm thinking 'He likes to write with humor' and 'He likes to use metaphors'. I

57. ## Critical Thinking

(1) It is an article of faith among some economists that the significant inventions of the contemporary world are the results of the innovative genius of big business organizations. (2) Yet in the United States, the current trend toward corporate mergers

58. ## Chemistry.. help plz

The concentration and volume of reagents combined in each trial are listed in the table below: Trial 00020 M 00020 M H2O(mL) Fe(NO3)3(mL) KSCN (mL) 1 5 2 3 2 5 3 2 3 5 4 1 4 5 5 0 Initially (right after combining and before any reaction occurs) the

59. ## maths permutation and combination

Your password for a given website is made up of three letters followed by four numbers. Find the number of possible passwords if there are no restrictions on what three letters and what four numbers can be used.

60. ## design technology

i`m finding it hard to find the answers to these questions for my homework . i know these questions have been asked before but i can`t find the answers from the websites people have been kind enough to find. Why is wool warmer than silk? why is silk

61. ## World History

What was the German form of this type of philosophy that was shaped by Hitler's fanatical ideas about German nationalism and racial superiority known as? The Third Reich

62. ## Algebra 2

Find an equation of variation where y varies directly as x and inversely as the square of w, and y=24 when x=8 and w=3.

63. ## environmental science

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

64. ## chem

If one gram of solid ice at -20 degrees C is heated to gaseous water at 125 degrees C how much energy is required?

65. ## chem

How much heat(energy) in calories will it take to warm 25 g of ice at -10 degrees C to liquid water at 40 degrees C?

66. ## commposition

How do I make an outline for a research paper?

67. ## Data analysis and statistics

I don't know where to begin with these problems would someone please call me Find the median of each set of numbers 14. 1, 4, 9, 15, 25, 36 Find the mode of each set of numbers. 9, 8, 10, 9, 9, 10, 8 41, 43, 56, 67, 69, 72 Statistics. A salesperson drove

68. ## Science

I need a climatogram for these biomes and I can't find any! HELP! alpine temperate forest taiga ocean

69. ## critical thinking

2) Which of the following, if true, would best explain the material presented in the table? A) The total value of property owned by Black residents in Washington during the 1830-1860 period was similar to that in other cities during this period. B) Rising

70. ## Algebra

A customer wants to make a teepee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the teepee, and he wants the teepee to be 12 feet across and 8 feet tall (see figure). How long should the pieces of PVC

71. ## science

In an ecosystem, some species become so adapted to each other that neither could survive without the other. Name one species and describe how it has become so adapted to organisms of another species that it could not survive without them. someone please

72. ## physics, social studies

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

73. ## Francais

Could you please check this short paragraph for mistakes? Thank you, I appreciate it. Quand Heffner a pensé de créer sa société il vivait dans un motel et il il n'a eu aucun espoir. Sa société ne faisaient pas bien. Cinq ans après être parti de la

Small companies typically have difficulty competing against large multinationals when their governments take part in regional trade blocs. What could governments do to help their small companies compete after the formation of such blocs?

75. ## Math

explain the difference between disjoint and overlapping events

76. ## Science

I have to do a research paper on someone, anybody, famous or not. I have to tell the biograghy about them, the technology that has influenced them, and tell how it influenced them. It seems easy, except I don't know who to write about. Any ideas?

77. ## algebra

Solution A is 25% acid and Solution B is 40% acid. How much of each is needed to make 60 liters of a solution that is 30% acid?

78. ## Math

Define a relation R from Z to Z by (x,y) are in the relation if and only if the absolute value of (x-y) is less than or equal to two. Is R symmetric?

79. ## Math

I need to figure out a pattern (using an algebraic expression) that will get me from: 1 to .01, 2 to .02, 3 to .04, 4 to .08, etc. all the way to 25 to 153,948.16! HELP

80. ## social studies

My class is doing a project on baseball using the 5 themes of goegraphy and I can't figure these questions out. Please help! 1. Why was that particularsite chosen to build the Wrigley stadium? 2. Have people needed to adjust to the climate because of too

81. ## Chemistry

I have to write a paper and bring in examples of each type of mixture for a class feast(so it needs to be edible). I want to know if i'm correct on the two that i have and i need an example of another and why it is it. I have Kool-Aid for a solution, jello

82. ## Algebra2

Can someone check my answer for me. List all the possible rational zeros of f(x)= 3x^5-7x^3+2x-15 p=15 1,3,5,15 q=3 1,3 answer: 1,3,5,15,1/3,1/5,3/5

83. ## english

Officials are considering placing the sturgeon on the endangered species list. If such an action is taken, ships, including those that carry goods and produce, will not be allowed to travel on the large rivers in our region that serve as breeding grounds

84. ## Science

Does anyone have any suggestions on where I might find the answers to my question? I have tried several different ways, but have not been successful. I think if I find the first one, I will find the others. If you have two strands of DNA, how many new DNA

85. ## Legal

I have another question that's got me stumped... The question of amendments to indictments is now mostly regulated by A: Common Law B: Statute C: Local rules of court D: Code. I believe it's D but then again I can't decide it it might be B. Can you direct

86. ## Data analysis and statistics

I don't know where to begin with these problems would someone please call me Find the median of each set of numbers 14. 1, 4, 9, 15, 25, 36 Find the mode of each set of numbers. 9, 8, 10, 9, 9, 10, 8 41, 43, 56, 67, 69, 72 Statistics. A salesperson drove

87. ## Microbiology

You have a debate in your study group whether rRNA alone can be used to determine the relatedness of organisms up to species level. Explain IN FULL whether you agree or disagree.

88. ## Microbiology

Molecular chronometers are used to determine the course of evolution. Explain in full what these are and how they are used. Why, even with this "tool", is evolution still so complex?

89. ## algebra

.25x+.4(60-x)=60(.3)

90. ## history

The great French historian Jules Michelet (1798-1874) sympathized with the French Middle Ages and with the Revolutionary epoch in France, yet he wrote his best work on the despotic French monarchy, which he despised. 5) The statement above, if true, would

91. ## english

I'm having trouble finding quotes from Romeo and Juliet that relate to the themes of Hierarchy and Injustice/Prejudice.. please help :(

92. ## Algebra 2

Can someone help me on how to do this problem 2xy(3x^2)(4y^-1)(5z^-3)

93. ## english

(1) It is an article of faith among some economists that the significant inventions of the contemporary world are the results of the innovative genius of big business organizations. (2) Yet in the United States, the current trend toward corporate mergers

94. ## Algebra I

I'm planning to landscape my yard. I plan to spend at least 6,000 and no more than 10,000. Write an inequality that shows this.

95. ## algebra !help!

(6x^3-8x^2-14x+13)/(3x+2)

96. ## history

i`m in year 7 and i need to write a newspaper report either from the catholic view or prodestant view about when hugh latimer and nicholas ridley bishops in 1555 were killed. no idea where to start.

97. ## critical thinking

2) Which of the following, if true, would best explain the material presented in the table? A) The total value of property owned by Black residents in Washington during the 1830-1860 period was similar to that in other cities during this period. B) Rising

98. ## Math

I am having trouble understanding this problem. Please help. A customer wants to make a teepee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the teepee, and he wants the teepee to be 12 feet across and 8

99. ## critical thinking

property owned by black residents in Washington D.C 1830-1860 property value(dollars)-no. of owners 1830 1840 1850 1860 1-200 26 30 21 8 200-400 20 35 58 51 400-600 13 26 32 69 600-800 7 16 20 61 800-1000 2 5 11 48 1000-1500 2 8 19 69 1500-2000 1 1 1 21

100. ## algebra1

how do figure out how to graph y>1/5x-2 5y-x

101. ## Math

Can someone check my work and see if I did this correctly? Problem: 9^(x+6)=3^x ln9^(x+6)=ln3^x (x+6)*ln(9)=x*ln(3) (x+6)/x=ln(3)/ln(9) x/x+6/x=0.49999977 1+6/x=0.49999977 6/x=0.49999977-1 6/x=(-0.5000002) x=6/(-0.5000002) x=(-11.9999952) is this correct?

102. ## math

Find the standard form of the equation of the line that is perpendicular to -6x+5y=-6 and contains (8, -6)

103. ## Algebra 2

Find an equation of variation where y varies directly as x and inversely as the square of w, and y=24 when x=8 and w=3.

104. ## algebra

(6/9-a^2)-(3/12+4a)

105. ## art

can anyone help? i need to find out what relief means for my art homework

106. ## algebra

15-3a/4(3-a)(3+a)

107. ## social studies

how did the pilgrims become friends with the wampanoag?

108. ## art

The great wall of los angeles. what are the denotative elements of it?

109. ## Science

What is the basic structure of all organisms?

110. ## philosophy

For some philosophers, writing is an unfortunate necessity, a means of communication that is at best irrelevant to the philosophical thought it expresses and at worst a barrier to that thought. The words in which the philosophical investigator writes up

111. ## Chemistry

Trial: | 00020 M | 00020 M | H2O(mL) ------------------------------------------ | Fe(NO3)3 mL | KSCN (mL) | ------------------------------------------ 1 | 5 | 2 | 3 Initially (right after combining and before any reaction occurs) the concentration of

112. ## English

what does it mean when it asks "for a person who you would view as an outstanding innovator in his/her own right?"

113. ## World History

What is the ter for the political philosophy followed by Hilter and Mussolini that emphasized importance of the nation or of an ethic group and the supreme authority of the leader over that of the individual?

114. ## Science

is there are national park/monument in the rainforest???

115. ## geography

how do trees help the enviroment ?

116. ## environmental science

what is the range of tolerance of physical and chemical conditions for giant pandas?

117. ## science

how is your baby protected inside the uterus?

118. ## art

can i use clay over the top of mod rock to build up a structural sculpture

119. ## algebra

how do i solve this problem? f(x)=3x and g(x)=4x-3, find f[g(5)] and g[f(5)]

120. ## art

what is the difference between denotative elements and connotative implications?