Questions Asked on
February 18, 2007

  1. Physics/Math

    At time t1 = 2.00 s, the acceleration of a particle in counterclockwise circular motion is (9.00i + 8.00j) m/s^2. It moves at constant speed. At time t2 = 3.00s (3/4 of a revolution later), it's acceleration is (8.00i - 9.00j) m/s^2. Find the radius of the

    asked by COFFEE
  2. econ

    Suppose the production function for widgets is given by: Q = KL - 0.8K^2 - 0.2L^2 where Q represents the quantity of widgets produced, K represents the annual capital input and L represents annual labor input. (a) For K = 10, what is the average

    asked by Vincy
  3. algebra

    Can someone please help me do this problem? That would be great! Simplify the expression: sin theta + cos theta * cot theta I'll use A for theta. Cot A = sin A / cos A Therefore: sin A + (cos A * sin A / cos A) = sin A + sin A = 2 sin A I hope this will

    asked by Valerie
  4. Re: Physics/Math

    At time t1 = 2.00 s, the acceleration of a particle in counterclockwise circular motion is (9.00i + 8.00j) m/s^2. It moves at constant speed. At time t2 = 3.00s (3/4 of a revolution later), it's acceleration is (8.00i - 9.00j) m/s^2. Find the radius of the

    asked by COFFEE
  5. physics

    How would you calculate the diameter of an oil molecule.A droplet of oil of given volume (cm cubed)is dropped onto a surface of water and spreads to fill area (cm square).The thickness of water is equal to the diameter of the molecule.Is there a formula to

    asked by mo.
  6. Physics/Math

    A sphere of mass 2.7 x 10^-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 41 degrees with the vertical. Find the magnitude of the push provided by the breeze and Find the tension in

    asked by COFFEE
  7. Comman Sense

    What are symbols of love. (Im doing a crossword puzzle) _E_ _ _ S Can you fill the blanks? H E A R T S

    asked by Sammy
  8. Math

    Which is True? A 3/5 > 1/2 B 1/2 < 4/9 C 5/11 > 1/2 D 1/2 > 5/8 How do I determine? Thanks for the help! The shortcut for doing these is as follows: Cross-multiply by multiplying the numerator of the first times the denominator of the second. Then multiply

    asked by Mikayla
  9. Chemistry

    A gaseous reaction mixture contains SO2, Cl2, and SO2Cl2 in a 2 L container with the gases having the following partial pressures: P(SO2)=0.35 atm, P(SO2Cl2)=0.19 atm, P(Cl2)=0.24 atm. Kp=91 for the equilibrium system: SO2 (g) + Cl2 (g) -> SO2Cl2 (g) Is

    asked by Hannah
  10. history

    What is the troubled Caribbean island nation where a president's murder led Wilson to send in the marines and assume American control of the police and finances? Mexico's president was assassinated in 1913. Almost two years later the U.S., under President

    asked by Mandy
  11. Writing

    i need a idea about a story novel, it has to have the following somewhere in the story it has to mention the hawiian king it has to be realist fiction it had to be charater vs charater i need the CONFLICT OF THE STORY!! please if can i need it by tomorrow

    asked by Anonymous
  12. column chromatography

    A student loaded a mixture, dissolved in 1cm3 of dichloromethane, CH2Cl2, onto a small flash chromatography column and then proceeded to elute with hexanes/ethyl acetate 10:1. He/she found that all of the mixture came off in the first 4 fractions, with no

    asked by sue
  13. physics

    check my anwsers please. How do we detect black holes? I think you observe their gravitational influence on things around them Is that correct? Respectively, Einstein's special theory of relativity and his general theory of relativity replace Newton's

    asked by korey
  14. supply and demand

    -what happens if a shortage of a product currently exists in the market? -what happens if a priceincreases? -when a firm advertises products, what does it atten too? -in a market, conpetitive forces guarantee that any price other than the equilibrium price

    asked by techguy
  15. Re: Physics/Math

    A sphere of mass 2.7 x 10^-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 41 degrees with the vertical. Find the magnitude of the push provided by the breeze and Find the tension in

    asked by COFFEE
  16. history

    what are the two towns near boston that in 1775 the first battles of the american revolution fought in? See below. =) Whatis the answer? you said see below but there's no answer. Writeacher wants you to look at the Wikipedia website that she linked in her

    asked by Mack
  17. Chemistry

    Based on the fact that calcium carbonate is an ionic compound, why is it insoluble in water???? Look up your solubility rules. I'm not really sure why, but I know my book states right off that Most sulfide, carbonate, and phosphate salts are only slightly

    asked by Dave
  18. writing inequalities

    sum of twice a number and 5 lies between 7 and 11 Here is how you would write that: 7 < 2x +5 < 11 You can subtract 5 from each term and divide each term by 2 while keeping the < signs in the same direction. This results in 2 < 2x < 6, and then 1 < x < 3

    asked by sma
  19. physics

    For a particular type of wave in a particular medium why must f and lambda be inversely proportional. Frequency deals with the number of waves per second, while wavelength deals with the distance from peak to peak. It would be inversely proportional

    asked by susan
  20. PHYSICS

    When a particle moves on a circle at constant speed, its acceleration vector: a) is zero m/s^2 b) points toward the center of the circle. c) points parallel to its velocity vector. It's zero m/s^2 since it's moving at a constant speed, right? No. Remember,

    asked by Technoboi11
  21. english

    i need some information about satire and epic in 17 and 18 century...characteristics and so on.. thank you [PDF] SATIRE AND POWER IN SEVENTEENTH-CENTURY FRANCE: THE CASE OF BOILEAU File Format: PDF/Adobe Acrobat on the predicament of the

    asked by marry
  22. TLC

    The following two solvents systems were found to separate compounds x and y by flash column chromatography: X- hexanes/ethyl acetate 10:1 Y- hexanes/ethyl acetate 10:4 which is more polar X or Y? Which solvent system must be used first?

    asked by sue
  23. Economics

    One of the important changes in the world economy over the past three decades has been the rapid increase in capital investment in the countries of the Pacific Basin (notably Japan and Korea). What are the implications of this investment for the commodity

    asked by Tia
  24. MATH PLEASE CHECK IT!!2

    m-2/m-5*m+5/m-2=-1 If your problem is this: (m - 2)/(m - 5) * (m + 5)/(m - 2) = -1 (m - 2) cancels out in both the numerator and denominator on the left-hand side since you are multiplying. That leaves us with this: (m + 5)/(m - 5) = -1 To solve for m:

    asked by Margie
  25. Science

    Could someone please explain to me in a simple way how FM, AM, and XM radio signals work? No one I ask seems to know. Thanks for the help. Radio waves are part of a general class of waves known as electromagnetic waves. In essence, they are electrical and

    asked by Jenna
  26. Physics/Math

    What are the x and y components of a vector a in the xy plane if it's direction is 215 degrees counterclockwise from the positive direction of the x axis and its magnitude is 12.9 m ? you would be in the third quadrant, so both x and y are negative. The

    asked by COFFEE
  27. trig integration

    i'm having trouble evaluating the integral at pi/2 and 0. i know: s (at pi/2 and 0) sin^2 (2x)dx= s 1/2[1-cos(2x)]dx= s 1/2(x-sin(4x))dx= (x/2)- 1/8[sin (4x)] i don't understand how you get pi/4 You made a few mistakes, check again. But you don't need to

    asked by christine
  28. chemistry

    are the noble gases of NCCN cyanogen = Argon HCN hydrogen cyanide = Neon thanks I don't know how to answer this. There are 10 electrons, all bonding electrons in HCN. In the case of F, for example, we say its ion is isoelectronic with Ne; i.e., there are

    asked by bex
  29. brain teaser

    7 c in the r 3pc 12 e in a d 32 t in the a EXAMPLE: 60 m in a h go minutes in an hour PLEASE HELP ME How about this one? 12 e in a d 12 eggs in a dozen 7 cups in the recipe? 7 colors in the rainbow

    asked by lola
  30. math

    A cue shaped box fits exactly around a soccerball with a diameter of 22.28 cm. What percent of the box is empty space? Help understand how to get to the answer, and wat it would be Cube shaped box*

    asked by thomas
  31. Valentin Frech

    need to know what a card with the picture of a boy hiding behind a heart might be. I got: Carte de _ _ _ H _ I _ _ I don't know what it is :( 1.) Dis a tes _ _ _ _ combien tu les amies. 2.) Ce qu'on ressent pour ses amis. 5.) On en envoie une a celui qu'on

    asked by Sammy
  32. Writing

    i need a idea about a story novel, it has to have the following somewhere in the story it has to mention the hawiian king it has to be realist fiction it had to be charater vs charater i need the CONFLICT OF THE STORY!!

    asked by Anonymous
  33. Physics/Math

    Given two vectors, a and b, such that a + b = a - b, find the magnitude of b. Consider the equation a + b = a - b to be n vector notation and both a and b have components. Subtract the a vector from both sides. You are left with b = -b That can only be

    asked by COFFEE
  34. trig integration

    s- integral endpoints are 0 and pi/2 i need to find the integral of sin^2 (2x) dx. i know that the answer is pi/4, but im not sure how to get to it. i know: s sin^2(2x)dx= 1/2 [1-cos (4x)] dx, but then i'm confused. The indefinite integral of (1/2) [1-cos

    asked by christine
  35. Punctuation Question

    Which is right... After someone says something, yell "liar". After someone says something, yell "liar." After someone says something, yell "liar." See the part at this site on quotation marks for words.

    asked by Sarah
  36. Spanish

    I have to translate a sentence to sentence that contains the words "a ticket to Barcelona." Would this be "un pasaje a Barcelona" or would it be correct to use "para" or "por" instead? Thanks. I believe you can use both 'a' and 'para'. I would probably use

    asked by Alex
  37. iambic pentameter english

    can you please put this poem in iambic pentameter In Winter the water begins to freeze then Spring arrives and the birds begin to sing Summer comes fast as you can feel the chinook breeze Fall fast approches as leaves start falling

    asked by anwar
  38. Comman Sense

    What does cupid shooy from his bow to make people fall in love? He shoots an arrow.

    asked by Sammy
  39. english

    I need help unscambling the letters ooqtisum to make an english word that we get from spanish mosquito

    asked by kristen
  40. Microeconomics

    In the context of a supply-demand diagram of the low-skill labour market, a minimum wage above the competitive equilibrium will reduce employment relative to the competitive equilibrium. Show that the total revenue earned by labour may nonetheless

    asked by Juilet
  41. Strategic

    Has the Department of Social Service primary competitor taken advantage of favorable conditions in its internal and external environment? Has this created competitive advantage for them? Why or why not?" What is the Department of Social Service's primary

    asked by Ms Brown
  42. Modern World History

    Where can i find information on the legacy of World War One? Mainly i'm lookin for The American Entrance, The Russian Exit, and The armistice. http://www.bbc.co.uk/history/worldwars/wwone/ Several sections are interesting here, including the one (scroll

    asked by Bryan
  43. history

    http://momo.essortment.com/versaillestrea_reif.htm http://en.wikipedia.org/wiki/Treaty_of_Versailles

    asked by Lance
  44. solution

    5y^2-13y+6 If you wish to factor, the factors are: (5y - 3)(y - 2) Checking using FOIL (First, Outer, Inner, Last): 5y^2 - 10y - 3y + 6 Combining like terms: 5y^2 - 13y + 6 I hope this will help.

    asked by Geoff
  45. English

    Is this a strong thesis statement: Ms Gilman captures the struggle of the narrator as she provides evidence of the journey of the narrator’s changing mental state that is not just about a woman losing her sanity but of a woman who is suffering from a

    asked by Laura
  46. Chem

    If you start with 3.500 g of ZnSO4 (Zinc Sulfate) & 7 H2O and heat it for 10+ minutes to remove the water of hydration, what will be the mass of water removed? Hint: Since you know the number of grams of hydrated salt present you then know the number of

    asked by Angie
  47. history

    is massachusetts the city where british soldiers fired on townspeople, killing five of them. And is massachuetts the city where in 1773 angered citizens dumped british tea into the harbor? http://en.wikipedia.org/wiki/American_Revolution Use Ctrl + F and

    asked by Mack
  48. French

    I need help with the following translations from english to french: Ring- the trick is that its a crossword so the word has to fit. here are the blanks; _ A _ _ E B A G U E thank-you Can you answer another question: I need to know what a card with the

    asked by Sammy
  49. Valentines French

    I solved most of my questions but these stumped me: 1.) Dis a tes _ _ _ _ combien tu les amies. 2.) Ce qu'on ressent pour ses amis. 3.) Qui sera l'elu(e) de ton _o_ _ r. (is it coeur?) 4.) La St-Valentin est la fete de l' _ _ _ _r. 5.) On en envoie une a

    asked by Sammy
  50. math

    wat is 4+5 9

    asked by Anonymous
  51. social studies

    I need help with my homework and its a whole page of questions from the book my culture my nation page 3 could you give me the answers to the whole page. Thanks heaps, Traci Kirk No one here has your textbook. Please post specific questions. Please note

    asked by Traci
  52. AP chem

    How do you propose a mechanism for this reaction: 18H(+) + 4S2O3(2-)-->SO3(2-) + 7S + 9H2O where the rate law: rate=k[Na2S2O3] with first order respect to Na2S2O3...

    asked by anonymous
  53. english

    some information about The Vanity of Human Wishes?? http://www.google.com/search?q=vanity+of+human+wishes&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA =)

    asked by bill
  54. physics

    is this the strutual formula for hydrogen cyanide H:C:::N and is this correct for cyanogen :N:::C:C:::N any advice woulds be appreciated This is more chemistry than physics. It is important to put the subject line carefully in order for the right people to

    asked by bex
  55. research paper

    can you provide me with other good points that you might think i should discuss in my paper within the outline that you provided me with. I just don't want to miss anything and give everything that is important for the comparing and contrasting of the two

    asked by kLN
  56. Space Science

    I can't seem to understand why lunar eclipses occur only twice a year and not monthly. I have looked up a lot of answers, but I don't understand. Thanks for the help.

    asked by Jenna
  57. history

    What city was the first and second continental congresses and the declaration of independence approved? Philadelphia

    asked by Mack
  58. Math

    Hello. Well, I was wondering how you are supposed to memorize 1 times 1 (easy) through 12 times 12 (hard)! How do you do it?? Repetition is one way.

    asked by Larry
  59. Writing

    i have to write a story novel, it has to have the following somewhere in the story it has to mention the hawiian king it has to be realist fiction it had to be charater vs charater i need the CONFLICT OF THE STORY!! please if can i need it by tomorrow As

    asked by Anonymous
  60. accounting

    The president of Penman Corporation, John Burton, has asked you, the company's controller, to advise him on whether Penman should develop a just-in-time (JIT) inventory system.

    asked by mike
  61. Microeconomics

    Electric utillities often practice second-degree price discrimination. Explain and show diagrammatically why the practice might improve consumer welfare.

    asked by Juilet
  62. Physics

    A coil is wrapped around the full length of a tube through which a soft iron rod is inserted. An aluminium ring is placed over the upper end of the rod. The time for the ring to fall is noted. When an alternating current is passed through the coil the time

    asked by Ishani
  63. Science

    How does solar power work? Since this is not my area of expertise, I searched Google under the key words "solar power" to get these possible sources: http://en.wikipedia.org/wiki/Solar_energy http://home.clara.net/darvill/altenerg/solar.htm I hope this

    asked by Charlotte
  64. Geography

    What two methods are used to represent features on the earth? On a physical map, shades of black to light gray or various colors can show elevations. On three-dimensional maps and globes, the mountains are raised slightly above the oceans.

    asked by May
  65. Chemistry

    Read earlier posts on this question and still find my self confused. The question being H2SO4(aq) -> 2H^+ (aq) + SO4^-2 (aq). A 21g sample of sulfric acid dissolved completely in sufficient water to make a 0.25 l of final solution. Calculate hydrogen ion

    asked by SOS mature student
  66. math

    if someone gave me a dollar every hour, how much money would i have in a year? $1/hr x (24 hr/day) x (365.25 days/yr) = ??

    asked by Mack
  67. math

    if someone gave me a dollar every hour, how much money would i have in a year? answered below. It isn't necessary to duplicate your posts.

    asked by Mack
  68. accouting

    If a firm pays its bills with a 30-day delay, what fraction of its purchases will be paid for in the current quarter? In the following quarter? What if its payment delay is 60 days? It will pay 1/4 of its yearly bills each quarter -- no matter what its

    asked by mike
  69. HIstoRy

    Hi Major help Why did WOrld War One was called (( The End Of World Wars )) something like that ????????/ The war to end all wars. http://en.wikipedia.org/wiki/War_to_end_all_wars

    asked by Amy
  70. Research paper

    Hello, would anyone help me out i have to do a research paper conducting a compare and contrast of two religions. Can anyone be kind enough to give me an outline set up for this kind of paper. I have the information on both relgions but I don't know how to

    asked by kLN
  71. Muscular Energy

    I am working on a project on energy and I can not find a definition of muscular energy. I am in the 4th grade. Can you help? i need the ans htht

    asked by Jen