Questions Asked on
September 26, 2008

  1. Uniform Motion

    It is common to see birds of prey rising upward on thermals. The paths they take may be spiral-like. You can model the spiral motion as uniform circular motion combined with a constant upward velocity. Assume a bird completes a circle of radius 8.00m every

    asked by Sun
  2. physics

    Hey can someone help with this. A movie stuntwoman drops from a helicopter that is 30.0 m above the ground and moving with a constant velocity whose components are 10.0 m/s upward and 15.0 m/s horizontal and toward the south. You can ignore air resistance.

    asked by Mel
  3. physics

    The 100 kg block in figure takes 7.00s to reach the floor after being released from rest. What is the mass of the block on the left?

    asked by Jennifer
  4. Physics

    a) A cannonball is fired horizontally from the top of a cliff. The cannon is at height H = 100 m above ground level, and the ball is fired with initial horizontal speed v_0. Assume acceleration due to gravity to be g = 9.80 m/s^2. Assume that the cannon is

    asked by Sam
  5. physics

    Multiple part question….. A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The cliff is 50.0m above a flat, horizontal beach. With what angle of impact does the stone land (in degrees). A

    asked by mb
  6. Chemistry

    A gaseous mixture of and contains 30.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 505mmHG ? I am getting .41 * (505/750)= .27 .27 is my answer, is this right.

    asked by George
  7. chemistry

    Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles)of He(g) is present in a helium-oxygen mixture having a density of 0.538g/L at 25celsius and 721mmHg ?

    asked by tomi
  8. physics

    one of the fastest recorded pitches in major league baseball. thrown by billy wagner in 2003, was clocked at 101.0 mi/h. if a pitch were thrown horizontally with this velocity, how far would the ball fall vetically by the time it reached home plate, 60.5

    asked by mb
  9. Uniform Motion

    It is common to see birds of prey rising upward on thermals. The paths they take may be spiral-like. You can model the spiral motion as uniform circular motion combined with a constant upward velocity. Assume a bird completes a circle of radius 8.00m every

    asked by Mel
  10. Chemistry

    Calculate the pH of: a) ammonia, 0.1M, in water b) ammonium chloride, 0.1M, in water c) a buffer solution containing ammonia (0.1M)and ammonium chloride (0.01M) For NH4^+, pKa = 9.25

    asked by Abby
  11. math

    rose counted her money and found that her 25 coins which were nickels, dimes, and quarters were worth $3.20. The number of dimes exceeded the number of nickels by 4. How many coins of each kind did she have? I know that the expression for nickles would be

    asked by kayla
  12. chem

    Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles)of He(g) is present in a helium-oxygen mixture having a density of 0.538g/L at 25celsius and 721mmHg ?

    asked by tomi
  13. pre calc

    rose counted her money and found that her 25 coins which were nickels, dimes, and quarters were worth $3.20. The number of dimes exceeded the number of nickels by 4. How many coins of each kind did she have? I know that the expression for nickles would be

    asked by kayla
  14. Physics

    To create artificial gravity, the space station shown in the drawing is rotating at a rate of 0.85 rpm. The radii of the cylindrically shaped chambers have the ratio rA/rB = 3.85. Each chamber A simulates an acceleration due to gravity of 10.0 m/s2. (a)

    asked by Nicole
  15. Math

    On a certain farm, on average, 64 hens lay 768 eggs in 64 days. On that same farm, on average, 46 hens eat 46 kilograms of wheat in 46 days. On this farm, on average, the consumption of how much wheat (in kg) corresponds to 2 dozen eggs?

    asked by Preston
  16. Chemistry, Buffers, pH

    Hi could someone please help me in the next 5 minutes with this question: Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final

    asked by janet
  17. Chemistry

    Given that for ethanoic acid pKa=4.75, calculate the pH of sodium ethanoate 0.1M.

    asked by Alice
  18. Microeconomics

    I put this question on the board before. What I am not clear on is if I should consider the $2 million once when I doing the calculations? Qestion: A publisher faces the following demand shedule for the next novel of one of its popular authors.

    asked by G
  19. stats

    Time taken in mins for student to walk to school. 1-5 mins (4 students) 6-10 mins (7 students) 11-15 mins (10 students) 16-20 mins (20 students) 21-25 mins (6 students) 26-30 mins (3 students) 1)Estimate the probability that a student selected at random

    asked by Keisha
  20. history

    WHAT ROLE DID GEOGRAPHY PLAY IN THE DEVELOPMENT OF EARLY CIVILIZATIONS?

    asked by taz manian
  21. math

    the smallest integer is zero. is it ture or false. give reason.

    asked by ra ny
  22. math distributive property

    rewrite each problem using the distributive property for the following 9 x 35 8 x 84 3 x 13

    asked by jordon
  23. math

    The diagonal brace of a shipping crate is 53 inches. The length of the shipping crate is 45 inches. Find the height of the shipping crate. please help!

    asked by jennifer
  24. Spanish

    Hello, for the three omens for fortelling Alonso's death I have so far Act 2 P. 113 line 75 Where Alonso says" Tello, a love that's true ignores, the greatest danger. It is my fate that I should have a rival. Is that good, i couldn't find anymore in act

    asked by Brady
  25. chemistry

    A 43 kg person drinks 490 g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 16% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? [Hint: The work done in

    asked by jamie
  26. chemisrty

    Why do gases deviate from ideal behavior at very high pressures?

    asked by mike
  27. history-the gold rush

    does anyone know good websites where i can find info about the gold rush. i need to make a journal and include information about what the journey was like, how i heard about it things like that. thanks!

    asked by kerrie
  28. chemistry

    how do i draw a particle model to describe the reaction between sulphur and iron in detail?

    asked by -
  29. physics

    when an object is dropped frome a hight of 20m above the surface of planet Z, it will fall 5m during the 2nd second of fall. What is the acceleration of a falling object near the surface of this planet?

    asked by Sussex
  30. com150

    Read the following sentences, and focus on the grammar area specified in the left column. Then, complete Appendix H by selecting the correct sentence (a or b) for each number and providing an explanation of why you made that choice.

    asked by e
  31. Chemistry

    If 560.70 g of water (22degrees) is displaced, what volume of gas displaced it? Any help would be greatly appreciated. I am thinking about using PV=NRT, but do I assume the value of the pressure is 1. Also using 560.7 do i determine the amount of moles?

    asked by George
  32. Algergra

    I am stumped! I have been working on these problems for the longest time and I can not figure out what I am doing wrong. Some how when I get to the last two steps I mess up, and I am beyond frustrated. The directions say: Write an equation of the line

    asked by Kay
  33. Math

    Determine if f could be a linear function x 0 1 2 3 4 f(x) 3 5 7 11 15 is this a linear function and then... 2x - 6y = 12 3x-9y = -27 What is the solution of the system of equations? A) no solution B) a point C) infinitely many solutions Is the system

    asked by Mike
  34. chemistry

    if Maalox is mixed with 40ml of 0.1 M HCI and isn't neutralized, how much extra help with this antacid pill need to neutralize 40ml of 0.1 M HCL by adding 0.05 M NaOH drop by drop to back-tritrate the solution until the pH is neutral?

    asked by Tamy
  35. statistics

    Explain the calculations for a hypothesis test and discuss how you would test for signifiance at the 0.05 level

    asked by nicky
  36. arithmetic

    Well I am really bad at math mostly multiplication and division.When I start to think that i am getting math my teacher teachs something new what do i do.

    asked by DeAna
  37. English

    In the book of The Diary of Anne Frank, what was the "war within" her (or what was Anne's "war within"?)

    asked by Mariz
  38. statistics

    level of significance, P-value, and confidence interval how do they relate?

    asked by nicky
  39. Intro to FInance

    If Mr. Hobbit deposits $2,000 at the end of each year for the next 10 yrs at the intrest rate of 12% per year, how much will have accumulated? How much will he have accumulated if he deposited the amounts at the beginning of each year?

    asked by Lynda
  40. claire

    Cuando es tu cumpleanos ( dia-mes-ano) does this tanslate to when were you born? ( day month year) is the answer correct - Tu cumpleano Febraro uno 1994 ( HELP )

    asked by SPANISH PLEASE HELP
  41. Us History

    How did the action of Daniel Shays and his followers relate to the economic problem of the Confederation period?What was the significance of the movement he led?

    asked by Cesar
  42. Algebra/math

    simplify the expression. Assume that all variables represent positive numbers. (36^-2y^4)-1/2(xy^1/2) I can't get the answer to this I just don't know how to answer this problem. Can anyone help? Thank You! Ashley

    asked by Ashley
  43. Critical Thinking

    Can you give me an example of a non prejudicial rhetorical devise. Also can you tell me if this statement is prejudicial rhetoric devise All SUV's are like small apartment homes on wheels

    asked by Sam
  44. physics

    A student atands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The cliff is 50.0 m above flat, horizontal beach. With what speed of impact does the stone land?

    asked by mb
  45. accounting

    I am having a hard time finding this. Can anyone help me please? Give an example of the kinds of decisions where incremental analysis would be used in each center. Revenue, profit, cost and investment.

    asked by Anonymous
  46. accounting

    Why do each responsibility centers have their own budget?

    asked by Anonymous
  47. statistics

    two parents who are carriers of TSD have 12 children, what is that no child have TSD, 1 child have TSD and 2 child have TSD

    asked by lovebug111
  48. science/math

    I have to make this density graph on a standard sheet of graph paper of this area outside. Each side of the area is a meter (in real life). What would be an good scale to use for my graph on graph paper?

    asked by Jasmine
  49. com grap...help!!!!!!!!``

    does anyone know how we can download free photoshop??????????

    asked by Anonymous
  50. history

    describe how a historian would use evidence to reconstruct an event that happened 2,000 years ago

    asked by taz manian
  51. history

    list three advances in technology and learning made by peoples of the ancient Middle East and tell why each one was important.

    asked by taz manian
  52. psy

    I need help to find some data that will help me define the best way to practice self-forgetfulness and humility.

    asked by rose (Ms. sue)
  53. math

    i have 40 coins all dimes, nickels, and quarter, worth $4.05. I have 7 more nickels than dimes. How many quarters do I have?

    asked by kayla
  54. cultural diversity

    other than the iat what measuments do sociologist use to measure prejudice

    asked by Anonymous
  55. science

    How would you design an experiment to determine which of two variables?

    asked by Brandi
  56. government

    nonparty groups that raise and distribute money to candidates are called: A)legal bribery organizations b)limited government interest corporations C)political action committees d)political interest and action committees.i think its c

    asked by Anonymous
  57. ecology

    what are the reasons for low phosphorus levels in soil? Please explain to me, it seems as if every site that talks about this is saying something different and I really don't understand.

    asked by Cynthia
  58. geography/social studies

    What body of land is smaller then the contenent and is completely surrounded by water

    asked by Frozenegg48
  59. claire

    One more please Como celebrate tu ultimo cumpleanos? ( fiesta? con quien? que hicieron Uds?) does this translate to what was the best birhtday ( a party with who and what did you do) is this correct Yo ultimo cumpleanos a grande fiesta con muchos mis

    asked by SPANISH PLEASE HELP
  60. 4th grade

    what feature makes up part of the u.s. border with canada? what feature makes up much of the u.s. border with mexico?

    asked by clarissa
  61. eth 125

    How can we get society to dwell on positive aspects instead of negative aspects, which normally leads to stereotyping?

    asked by Anonymous
  62. algebra/math

    use the FOIL method to perform the multiplication. (x^1/2-2)(x^1/2+4) I can not seem to find the answer to this problem. Can anyone help? Thank You!

    asked by Ashley
  63. 8th grade

    Dear Sir, I have question related to Acids and Alkalis is that;- You are given a colourless solution.Describe three tests you would carry out to determine the solution is an acid or an alkali without tasting or using indicators. Please reply me quikly

    asked by Fatima
  64. algebra/math

    use the FOIL method to perform the multiplication. (x^1/2-2)(x^1/2+4) I can not seem to find the answer to this problem. Can anyone help? Thank You!

    asked by Ashley
  65. physical science

    As an object approaches the Earth’s surface, what will its acceleration be?

    asked by geraldine
  66. Chemistry

    Chromatography How can I tell which of two mobile phases is more polar? Does the fact that one solvent (e.g. isopropanol/ammonia) moves up the TLC plate slower than another solvent (e.g. hexane/ethyl acetate/ethanol)? Or should I look at how far up the

    asked by H
  67. chemistry

    If the Kelvin temperature of 2 L of a gas at STP doubles, the new volume would be what ?

    asked by mike
  68. Intro to Programming

    I have no clue what i am doing - any and all help would be appreciated - thanks! Finding an Input Giving a Desired Output PROBLEM BACKGROUND In many control problems, the output response of a system to an input is a non-linear function, that function

    asked by Oscar
  69. MicroEconomics

    One of the early economic laws was called Says Law that stated that supply creates its own demand. Using the circular flow chart, explain what this means and how an expanding population results in economic growth.

    asked by Katie
  70. Project Management

    How can a project manager be sure that he or she has chosen the correct metrics to assess project performance?

    asked by Clay
  71. chemistry

    what is the 'big idea of energy'???!

    asked by -
  72. Environmental Science

    Explain the four factors that produce changes in population size. Which factors are affecting the population size in the video?

    asked by Anonymous
  73. 5th grade math urgent

    Okay look: 00-01-$7586 01-02-$8022 02-03-$8502 03-04-$9249 04-05-$9877 Jason started college during the 2001-2002 year and graduated during the 04-05 year. How much did Jason's education cost? How do you do it????

    asked by Andrew
  74. physics

    Explain how the pitch of the roaring sound relates to the length of the tube.

    asked by H
  75. physics

    A seashell is basically an open-closed tube rolled up. Explain why you hear a roaring sound (the sound of the sea) when you place a seashell (or any other kind of tube) up to your ear.

    asked by H
  76. chemistry

    A 2.34L container of H2(g)at 752mmHg and 24 degrees is connected to a 3.17L container of He(g) at 717mmHg and 24 degrees. After mixing, what is the total gas pressure, in millimeters of mercury, with the temperature remaining at 24 degrees?

    asked by tomi
  77. Describe other measurements sociologists use to ca

    Describe other measurements sociologists use to calculate prejudice

    asked by catherine
  78. English

    Who re-wrote the diary of Anne Frank and where can I get a website that has an ebook for it?

    asked by Mariz
  79. government

    propaganda is a technique:

    asked by Anonymous
  80. Writing

    I am trying to write an essay on What ideas are true/untrue of the North.What do it means by ideas. Help??

    asked by Benny
  81. Chemistry

    Chromatography How can I tell which of two mobile phases is more polar? Does the fact that one solvent (e.g. isopropanol/ammonia) moves up the TLC plate slower than another solvent (e.g. hexane/ethyl acetate/ethanol)? Or should I look at how far up the

    asked by Jeannie
  82. science

    how does yeast cause bread to rise?

    asked by erin
  83. Ameician History

    responding to an earlier post that was not clear, I am interesed in a time line of the development of early Americian history of the US. Thank you

    asked by Dana
  84. health care in the US

    What can the United States’ health care system learn from health care systems in other countries?

    asked by jean
  85. english

    Which sentence is correct?why I eat cake, carrots, pizza, and drink soda. I drink soda and eat cake, carrots, and pizza.

    asked by Jenn
  86. International Business

    Does Western Union standardize products or adapt them for different markets?

    asked by Cheryl
  87. Literacy

    These letters are supposed to be unscrambled to make 4 words: eeahtkssatetlg

    asked by Penny
  88. social studies

    what is the vegetation in europe ? are there forest,deserts,jungles,etc

    asked by Syd
  89. IS5

    Plese can you help me with this: describe your strategy for factoring a polynomial, give an example showing all of you steps

    asked by Jazmin
  90. law

    confidentiality of health information final examination. examination 40902600

    asked by nancy