Questions Asked on
June 7, 2009

  1. Physics

    a model of a helicopter rotor has four blades, each 3.40 m in length from the central shaft to the tip of the blade. The model is rotated in a wind tunnel at 550 rev/min. A) what is the linear speed, in m/s of the blade tip? B.) what is the radial

    asked by Sarah
  2. Physics

    A tennis player hits a ball at ground level, giving it an initial velocity of 24 m/s at 57 degrees above the horizontal. (a) what are the horizontal and verticla components of the ball;s initial velocity? (b) how high above the ground does the ball go? (c)

    asked by Sarah
  3. Physics

    A markman fires a .22 caliber rifle horizontally at a target the bullet has a muzzle velocity with magnitude 750 ft/s. How much does the bullet drop in flight if the target is (a) 50.0 yd away and (b) 150.0 yd away? for this question i was given the

    asked by Sarah
  4. Math

    Use your knowledge of exponents to solve. a) 1/2^x=1/(x+2) b) 1/2^x>1/x^2 So I know that these functions are rational functions.. and I am trying to solve for x. I tried to solve them by I keep getting stuck with the exponent 2 which is the exponential

    asked by Halle
  5. Math

    The dimensions of a gift box are consecutive positive integers such that the height is the least integer and the length is the greatest integer. If the height is increased by 1 cm, the width is increased by 2 cm, and the length is increased by 3 cm, then a

    asked by Christine
  6. Chemistry

    Would CH3-CH2-CH2-O-CH2-CH2-CH3 be Dipropyl Ether or Propyl Propyl Ether? Thanks for checking.

    asked by Gwen
  7. Science

    give 3 examples of pure science vs applied science

    asked by Matt
  8. chemisty

    is this correct?: word equation: nitric acid+potassium hydroxide= potassium nitrate balanced symbol equation: 3HNO3+2KOH=2KNO3+H2O

    asked by andréa
  9. Syllables

    How many syllables are in chocolate? 2 or 3?

    asked by Angie
  10. english

    can you please give me a metaphor for largeness. for smallness the metaphor i have is She was a spider, unnoticed by all, spinning her web among the endless, towering redwoods.

    asked by elina
  11. english - huckleberry finn

    Discuss the characteristics of JIm and how or if he qualifies asa heroic figure.

    asked by eagle
  12. History

    Help! I have a paper that needs to adress the following question: Describe how agriculture contributed to economics, and how it contributed to economic development, regional specialization, and social reform,during 1780-1850. I am not sure where to begin

    asked by Mary
  13. 1st grade

    What is your name; asked Anita.

    asked by dawn
  14. english

    metaphor for largeness

    asked by elina
  15. Math

    I don't think I am understanding this question. Question: A zoo started with 16 cranes and panned to hatch 20 chicks. A few birds were kept for breeding and the rest realeased into the wild. At the end of last year, a total of 136 cranes had spent some

    asked by Lena
  16. chemistry

    how many atoms of tungsten are in 504.56 g of tungsten(IV)acetate. i attempted this problem but ended up with atoms of tungsten(IV) acetate in tungsten(IV) acetate instead of atoms of just tungsten in tungsten(IV) acetate. please help thanks

    asked by lyne
  17. english

    metaphor for optimism. I'd really appreciate it if you'd help me

    asked by elina
  18. AP Stat

    how do you find the center of a histogram by just lookiing at it I find it hard just given the histogram because then you don't have actual values and estimases because of the scale of the histogram and calculate the median which is the center so i do you

    asked by AP statistics
  19. grade 9 math

    can you please help me with this question, i'm completely lost. talia's uncle owns a warehouse and he has given Talia an area in which to store the computer supplies for his company. her uncle gave Talia 40 m of rope and told her to section off a

    asked by swati
  20. 7th grade

    What is Indirect measurement?

    asked by Billy
  21. biology

    im kind suck on this one can anyone help me out: explain four ways through which your body natually deals with microbes.

    asked by andréa
  22. Logarithmic Function help

    Ok, I was getting all my answers right until I stumbled on this one: 5e^0.2x=7 This is what I was doing: 5e^0.2x=7 5lne^0.2x=ln7 5*0.2x=ln7 0.2x=(ln7/5) ??? The answer is 5ln(7/5) but i do not know how they derived to this. Thank you so much!

    asked by Marlon
  23. Science

    I have a question re: my Science final: How do "human activities" affect the carbon oxygen cycle? Thank you!!!!

    asked by Ashley
  24. CHEM-HELP!!!!

    8. 2(NH4)3PO4--> 3N2+ O2+ 12H2+ 2PO3 a)name products b)Name the reactant c)type of reaction this is the only info that is given///thank you

    asked by ALEX
  25. Economics

    If all the assumptions of perfect competition hold, why would firms in such an industry have little incentive to carry out technological change or much research and development? What conditions would encourage research and development in competitive

    asked by Linda
  26. Chemistry

    I am trying to find the theoretical yield for this lab I am working on. The steps to finidng it would be great. In my lab I took 40mls of H2O + 4g of AgNO3+ 8g of NaCL then I stirred it and filtered in a buchner funnel to be left with 6.7496g of silver

    asked by Gweedo8
  27. accounting

    The auditors may decide to confirm accounts payable on an audit engagement. Describe two reasons why the confirmation of accounts payable is not a genreally accepted auditing procedure, describe the audit crcumstances in which the auditors are likely to

    asked by kew
  28. English

    1. I like taking walks. 2. I like taking a walk. (Which one is OK? Are both right?) 3. You should obey the school rules. 4. You should keep the school rules. 5. You should follow the school rules. (Are all the same?) 6. He helped Mother who was sick in

    asked by John
  29. spanish

    Write a letter in Spanish in which you describe something that happened to you which required consulting a nurse, doctor or dentist. Include in your description: why you needed a particular medical service where you went to get it and what happened when

    asked by y912
  30. algebra

    Graph the equation using the slope and the y- intercept y= 8/5x+5

    asked by ELLEN
  31. Chem.

    How do you name an ester? I know they end in -anoate. But when you have one like CH3-C(double bond to O going downward)-O-CH3, would it be dimethyl anoate? Thanks.

    asked by Gwen
  32. chem

    how many grams of a precipitate will form when you mix 45 ml of a 3.5M silver nitrate solution with 45 ml of a 5.4 M magnesium chloride solution i sorted the problem but have no clue how to start

    asked by lyne
  33. 3rd grade

    What is a frog's full scientific name?

    asked by Kierra
  34. AP Stat

    how do you find the center of a histogram by just lookiing at it I find it hard just given the histogram because then you don't have actual values and estimases because of the scale of the histogram and calculate the median which is the center so i do you

    asked by AP statistics
  35. English

    1. My dog spoiled my homework. 2. My dog ruined my homework. 3. My dog torn my homework notebook. 4. My dog torn the notebook containing my homework. (Are all grammatical?) 5. My dog gave birth to 4 puppies. 6. My dog bore 4 puppies. (Are both OK? Do you

    asked by John
  36. English

    On "The Narrative of the Life of Frederick Douglass" (chapter 1) : Quote the law about children of slave women. What is the result of the law? How does it contradict the argument that God cursed Ham, therefore, slavery is justified? I know the story of

    asked by Anonymous
  37. Symbiotic Relationships

    I'm having some trouble thinking of examples for mutualism and parasitism in nature. If anyone has any links to help me read about some of those relationships, I would be very thankful. :)

    asked by Sarah
  38. Science

    What makes up the scientific name of an organism? Why is it important to use scientific names rather than common names?

    asked by Ashley
  39. english - huckleberry finn

    Discuss Huck's struggle with his conscience and how or if he qualifies asa herioc figure.

    asked by eagle
  40. college

    I don't get how to do this question, please help!! verify that r(r (x ) = r^-1(x ) if r( x) = 2x-7 / 4x-6

    asked by Sam
  41. English

    1. I'm excited because I get on the airplane for the first time. 2. This is my first trip abroad, so I am very excited. 3. I got off the airplane at the airport. 4. I waved on the laddle to the airplane. 5. I was excited because I could go abroad for the

    asked by John
  42. Chem

    Is CH(three bonds)C-CH2-CH3 1-butyne? Thanks for checking!

    asked by Gwen
  43. mary

    The question is: a horizontal force of magnitude 22.0 N is applied to a 2.86 kg book as the book slides a distance d = 0.73 m up a frictionless ramp at angle θ = 30°. The book begins with zero kinetic energy. What is its speed at the end of the

    asked by physics
  44. Algebra

    Match ABCDE with the solution set below A. {4/3, -4} B. {x|x > 4 or x < -4/5} C. No Solution D. {x| -11 < x < -7} E. All Real Numbers Solution set ABCDE|x + 9| < 2 ABCDE|5x - 8| > 12 ABCDE|3k + 4| = 8 ABCDE|x - 6| = -10 ABCDE|6x + 8| > -4

    asked by Nick K.
  45. physics

    The question is: a horizontal force of magnitude 22.0 N is applied to a 2.86 kg book as the book slides a distance d = 0.73 m up a frictionless ramp at angle θ = 30°. The book begins with zero kinetic energy. What is its speed at the end of the

    asked by mary
  46. Chemistry

    I am trying to find the theoretical yield for this lab I am working on. The steps to finidng it would be great. In my lab I took 40mls of H2O + 4g of AgNO3+ 8g of NaCL then I stirred it and filtered in a buchner funnel to be left with 6.7496g of silver

    asked by Gweedo8
  47. grade 9 mathimathic optimizing

    i am lost completly i don't know what to do. please help me!!!! a farmer is adding a rectangle corral to the side of a barn. the barn will form one side og the rectangle . the farmer has 16 m of fencing to use. conduct an investigation to determine the

    asked by sameul
  48. Biology

    Mutations to DNA cause changes in organisms. Explain why this might be importatnt to the survival of a species. Please help with this. I've tried but can't seem to find an adequate answer for this. Thank you very much!!!

    asked by John
  49. financial management

    What is the basic accounting formula?

    asked by Anne
  50. 7th grade

    HOW HAVE INTERNATION AGREEMENTS BETWEEN FIRST NATION TRIBES AND WASHINGTON STATE EFFECTED OUR STATE (WASHINGTON) IN THE PAST AND PRESENT?

    asked by MICAELA
  51. Biology

    In class I had to make an organism and explain how it adapts to it's imaginary environment. We have to explain the amount of food of eats everyday too. my teacher said that Theres a 10% rule to follow but I don't know what it is. Can u help? Do you know

    asked by :)help please
  52. biology

    explain why a 100m runner has a bigger oxygen depth than a marathon runner. im lost please help

    asked by andréa
  53. 9th grade

    sugar is a compound that is not made of ions. will it form an acidic,an alkaline or a neutral solution when it is dissolved in water? please explain your answer for me!

    asked by andréa
  54. economics

    Is it possible for a female only 21 years old and 1 year of work experience to have an income of $92560 US in the 1980s?

    asked by lin
  55. History

    I am trying to find indepth information on the anti-federalists argument for states' rights. I know that it involved the states' rights concerning political, economic and military control. I can only find information that is way over my head. I am in the

    asked by Sara
  56. Math

    A) A rectangle has perimeter 64 cm and area 23 cm^2. Solve the following system of equations to find the rectangle's dimensions. length=23/width length + width = 32 B) Solve the system of equations x^2+y^2=1 xy=0.5

    asked by Christine
  57. Science

    Which direction do meridians run and what do they measure?

    asked by Jim
  58. Chemistry

    Are substances with an HO- Alcohols? What about items that are O-C with a O double bonded to the C and above it? Are they acids? Thanks!

    asked by Gwen
  59. Physics

    Hello can some one show and exlpain to me the derivation of this formula? V = (Ft(mL^-1)^-1)^(2^-1) or simply V = sqrt (F/(m/L)) were V = the veloctiy of a piece of string Ft = the force of tension m = mass L = length Thank you!

    asked by Physics
  60. science

    Please help with comparing and contrasting osmosis and diffusion. Thank you! *Thank you Ms Sue for all of your help with my questions!!!

    asked by Ashley
  61. HIS115 U.S HISTORY TO 1865

    hOW MIGHT THE GUTIERREZ MAP INDICATE WHERE NATIVE AMERICANS LIVED STRENGTHENED EUROPES CLAIM OF SOVEREIGNTY

    asked by Anonymous
  62. English

    1. I will become a farmer so that I may grow seedless big grapes. 2. I will become a farmer so that I may grwo big seedless grapes. (What do you think of the world order? Which one is right?)

    asked by John
  63. English

    1. Korea lost at the soccer game by 1:2. 2. Korea lost in the scooer game by 1:2. (Which preposition do we have to use? Are both right?) Responses English - Ms. Sue, Sunday, June 7, 2009 at 9:46pm We usually don't use any preposition. We say: Korea lost

    asked by John
  64. chemistry

    list three ions that are iso-electric with potassium +1 please explain i have no clue

    asked by lyne
  65. Technology in Health Services

    Imagine you work for a health care or human service organization that does not use an intranet. Write a proposal to management that lists the elements of an effective intranet, why each element is important, and the benefits of building an intranet as

    asked by Nikki
  66. Math

    UUse addition to justify that 108>14. Here is my answer: 108=14+81 but I feel that I need to answer something else. Could you please help me? Thanks.

    asked by B.B.
  67. ACcounting Ethics

    3. Did Enron’s directors understand how profits were being made in this segment? Why or why not?

    asked by jo
  68. Science

    Please help with comparing and contrasting "osmoisis and diffusion" also please help with an example of each. Thank you!!!

    asked by Ashley
  69. Science

    Crustaceans grow by doing what?

    asked by Jack
  70. Chem.

    Is a substance written HO-C (with a double bond connecting the C to an O north of it)-CH2-CH3 Ethenoic Acid? Thanks!

    asked by Gwen
  71. psychology

    How much time and energy should invest in making sure you aren't guilty of the self-serving bias?

    asked by Anonymous
  72. Chem help

    An equilibrium reaction which has K1 = 6.5 x 10¯2 at 100oC and has ∆Horxn = -49.5 kJmol¯1. What is the value of K at 250 oC? I can't get the right answer, which is supposed to be 6.68 x 10^-4. How does one do this? Thanks

    asked by Duffy
  73. spanish

    can someone tell me how to write this sentense in spanish: A few months ago my teeth started hurting a lot. a unas mes ..tener dolor de muelas mucho something like that please help me thanks a lot!

    asked by y912
  74. spanish

    how can i write this in spanish: I went to the dentist's office to get them checked hacer una excursión la oficina dentista .. please help me thanks a lot!

    asked by y912
  75. anonymous

    what atoms usually form coordinate covalent bonds i couldn't find this anywhere also i just want to make sure is the electronegativity difference range for polar covalent bonds .4 - 2.1 paulings?

    asked by lyne
  76. SCIENCE .

    Where do sedimentary rocks originate? How are they formed? What are the three categories of sedimentary rocks? What are the distinguishing characteristics between the three categories of rocks?

    asked by scooby91320002
  77. marketing..

    the Maturity stage has impacted or will impact on the product sales, profits, pricing, and marketing communication.with the ipod

    asked by scooby9132002
  78. marketing..

    What alternative approaches to life cycle management would you suggest? for the ipod

    asked by scooby9132002
  79. earth/space science

    How does length of the year change with distance from the sun?

    asked by nikcy
  80. Marine Biology

    What zone is where most life exists?

    asked by Katie
  81. Chem.

    Is the number of branches or carbons more important when determining the boiling point of a substance? I have CH3-CH3 and C3-CH (with a branch leading upward to CH3)-CH3. Thanks for your help.

    asked by Gwen
  82. egypt

    i am doing a book review on Egypt by i don't know how to write it so that it looks more proffesiomal. i would like some posted...... * tips * suggestions *ideas thank u

    asked by tersa S
  83. Science

    One last question... How can energy from the sun transfer into your body? Thank you!

    asked by Ashley
  84. English

    1. Korea lost at the soccer game by 1:2. 2. Korea lost in the scooer game by 1:2. (Which preposition do we have to use? Are both right?)

    asked by John
  85. English

    1. I am glad because my dog gives birth to four puppies. 2. I am glad because my dog gave birth to four puppies. 3. I was glad because my bog gave birth to four babies. 4. I was glad because my dog had given birth to four babies. (Which expressions are

    asked by John
  86. Business Communication

    In what ways do audience, purpose, tone, and structure affect the formatting of the memo and the paper?

    asked by Neta
  87. marketing..

    A prediction of the product’s decline in the marketplace.

    asked by scooby9132002
  88. marketing

    a recommendation for management of the ne t applicable stage of the product life cycle.

    asked by scooby91320002
  89. egypt

    what are the processes of publishing a book? please answer as soon as possible!

    asked by tersa S