Questions Asked on
April 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

    asked by Odd
  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

    asked by Sandhya
  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

    asked by matt
  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

    asked by Manda
  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?

    asked by joe
  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

    asked by Erin
  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

    asked by Renee
  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.

    asked by Jean
  9. Science

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

    asked by Anonymous
  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

    asked by Sandhya
  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.

    asked by ron
  12. chem

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

    asked by ami
  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

    asked by Scott Ingraham
  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?

    asked by Anonymous
  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?

    asked by hanaa
  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

    asked by bill
  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

    asked by Sandhya
  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

    asked by Sandhya
  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?

    asked by john
  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

    asked by Sam
  21. college algebra

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

    asked by Jeff
  22. English

    Amelia Earharts "philosophy of life"???

    asked by Soraya
  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

    asked by Jill
  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?

    asked by Jeannine
  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

    asked by Jeff
  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

    asked by Matt
  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!!!

    asked by Miley Cyrus
  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

    asked by Anonymous
  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

    asked by Sam
  30. algebra

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

    asked by john
  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

    asked by Chelsea
  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

    asked by Joseph
  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

    asked by Amanda
  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

    asked by Angel
  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

    asked by dear drwls
  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

    asked by Lucy
  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

    asked by dena
  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

    asked by jason
  39. English (opinion)

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

    asked by Soraya
  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

    asked by Markeda
  41. microbiology 2

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

    asked by katlego
  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,

    asked by Emily
  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?

    asked by tricia
  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

    asked by Matt
  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

    asked by Eileen
  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

    asked by Bobby
  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

    asked by Angel
  48. Geometry

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

    asked by Lauren
  49. History about Gandhi

    is Gandhi a political activist???

    asked by Soraya
  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

    asked by Bizzy
  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

    asked by Kurt
  52. science

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

    asked by j
  53. art

    what can I compare and contrast about arthur boyd

    asked by Judy
  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

    asked by Joseph
  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)

    asked by Eileen
  56. Academic Writing II

    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

    asked by Ashley
  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

    asked by Anonymous
  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

    asked by Amy
  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.

    asked by matt
  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

    asked by zoe
  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

    asked by Seth
  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.

    asked by Amanda
  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

    asked by Pamela
  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?

    asked by joe
  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?

    asked by bob
  66. commposition

    How do I make an outline for a research paper?

    asked by Eli
  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

    asked by Theresa
  68. Science

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

    asked by Taylor
  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

    asked by tricia
  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

    asked by Anonymous
  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

    asked by Dj
  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

    asked by Pamela
  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

    asked by Sarah
  74. business

    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?

    asked by Anonymous
  75. Math

    explain the difference between disjoint and overlapping events

    asked by Cheyenne
  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?

    asked by Jennifer
  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?

    asked by hanaa
  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?

    asked by Jane
  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

    asked by Andrew
  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

    asked by Jillian
  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

    asked by Anthony
  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

    asked by Jaden
  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

    asked by Becky
  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

    asked by Kally
  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

    asked by Justie
  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

    asked by Theresa
  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.

    asked by Leah
  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?

    asked by Leah
  89. algebra

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

    asked by hanaa
  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

    asked by Jeff
  91. english

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

    asked by Cynthia
  92. Algebra 2

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

    asked by Vicky
  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

    asked by Angel
  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.

    asked by Patricia
  95. algebra !help!

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

    asked by hanaa
  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.

    asked by paul
  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

    asked by tricia
  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

    asked by Anonymous
  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

    asked by tricia
  100. algebra1

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

    asked by hjhgjh
  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?

    asked by Tim
  102. math

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

    asked by mimi
  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.

    asked by Amanda
  104. algebra

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

    asked by hanaa
  105. art

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

    asked by hayden
  106. algebra

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

    asked by hanaa
  107. social studies

    how did the pilgrims become friends with the wampanoag?

    asked by samy
  108. art

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

    asked by brookie
  109. Science

    What is the basic structure of all organisms?

    asked by Hannah
  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

    asked by Amanda
  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

    asked by Anonymous
  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?"

    asked by Soraya
  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?

    asked by Seth
  114. Science

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

    asked by Taylor
  115. geography

    how do trees help the enviroment ?

    asked by leanne
  116. environmental science

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

    asked by zak
  117. science

    how is your baby protected inside the uterus?

    asked by muhamsx
  118. art

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

    asked by bernadette
  119. algebra

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

    asked by john
  120. art

    what is the difference between denotative elements and connotative implications?

    asked by april
  121. math

    can someone simpilfy this? 1+2/x-1 divided by x^2/x divided by x^2+x-2

    asked by c.j.
  122. ecology

    average rainfall per year in the ocean

    asked by gabby