Questions Asked on
May 25, 2008

  1. maths

    x=tcost & y=t+sint then find dx2/d2y

    asked by rohit singh
  2. chemistry

    Taking note of the equilibrium 4HCl(g) + O2(g) ----> 2H2(g) + 2Cl2(g). What would be the the equilibrium law expression for the balanced chemical equation?

    asked by Johnathan
  3. MAT 116 Algebera 1A

    What similarities and differences do you see between functions and linear equations studied in Ch. 3? Are all linear equations functions? Is there an instance when a linear equation is not a function? Support your answer. Create an equation of a nonlinear

    asked by shelly, k
  4. calculus

    identify the conic section. Write in standard form and graph. 5x^2-6y^2-30x-12y+9=0

    asked by chelsea
  5. physics

    A dime .334 m away from, and on the optical axis of, a concave spherical mirror produces an image on the same side of the mirror as the source. The image is .093 m away from the mirror. If the dime is moved on the axis to .229 m from the mirror, how far

    asked by help?
  6. Math

    find the are of a regular octagon whose sides are 12cm long.

    asked by Tareena
  7. Calculus

    Sketch a graph of a function f(x) that is differentiable and that satisfies the following conditions. c) f'(-3) = 0 and f'(1) = 0 Please show me, step by step, how to sketch the problem!

    asked by Anonymous

    determine the mass of CO that is produced when 45.6g of CH4 react with 73.2g of O2. 2CH4 + 3O2 ---->2CO + 4H2O nCH4 = 45.6 g/16.05 g/mol =2.84 mol nCO=2.84 mol mCO=n*M =2.84*28.01 =79.5 grams

    asked by Nicole
  9. physics

    An object whose height is 3.5 cm is at a distance of 8.5 cm from a spherical concave mirror. Its image is real and has a height of 11.2 cm. Calculate the radius of curvature of the mirror. How far from the mirror is it necessary to place the above object

    asked by help?
  10. physics

    By what length is a light ray displaced after passing through a 4.7 cm thick sheet of material (n=1.38) with an incident angle of theta = 33.5°.

    asked by help?
  11. MAT116- Algebra 1A

    What is the difference between domain and range? Describe a real-life situation that could be modeled by a function. •Provide feedback about your classmates’ answers. Describe the values for x that may not be appropriate values even when they are

    asked by shelly, k
  12. MATH

    solve traingle ABC if A=63 degrees 10minutes, b=18 and a=17. Mark all solutions clearly.

    asked by Tareena
  13. math

    7y=2x-5, the x equals what?

    asked by Cheri
  14. Science

    I have to write a paper on what I consider to be "bad science" and proved an example of what is bad science such as something from the media, commericals, scientist's statement. I was wondering if someone could help me find an example of "bad" science

    asked by Amanda
  15. Oral Presentations

    I've got an upcoming speech to prepare, and my teacher has hardly given any preparation time and I'm the type of person who is very conservative and quiet. I'm afriad of being boring with my speech because our teacher has told us to make it interesting,

    asked by TP
  16. chemistry-confirm please

    Only a chemist can be trusted with the combination to the safe containing a ton of money. The combination is the pH of solution A, followed by the pH of solution C. (for example: is the pH of solution A is 3.47 and the pH of solution C is 8.15 the

    asked by Tom
  17. History

    How much is an Italian Florin worth, compared to current American Money?

    asked by Danielle
  18. English Expression

    There is a book at the back of the box. There is a book at back of the box. ----------------------------- Which idiom should I use?

    asked by John
  19. Math~Algebra

    11. A black racer snake travels 46.0 km in 20 hours. What is the speed in km/h?

    asked by Sahara
  20. Fallacys

    can any one please check thisfor me? Fallacy Type Fallacy Statement Ad hominem/genetic 8. From one politician about another: “He’s a two-faced, liberal, anti-family, anti-values idealist!” Wishful thinking 15. Sure, I’ve heard that it’s better to

    asked by Gerik
  21. Economics

    write a lecture that explains the gold standard and addresses the functions of the world’s major foreign exchange markets.

    asked by Max
  22. Intermediate algebra

    Seven times the difference of six and a twice a number yields the same result as the same number decreased by one.

    asked by Rene
  23. physics

    A laser beam enters a .125 m thick glass window at an angle of 39° (from the normal). The index of refraction of the glass is 1.46. At what angle from the normal does the beam travel through the glass? that answer is 25.53 deg the second part asks How

    asked by help?
  24. physics

    At 08:00hrs a 2.0- m-long vertical stick in air casts a shadow 1.8 m long. If the same stick is placed at 08:00hrs in air in a flat bottomed pool of salt water half the height of the stick, how long is the shadow on the floor of the pool? (For this pool, n

    asked by help?
  25. Algebra

    A long distance trucker traveled 280 miles in one direction during a snow storm. The return trip in rainy weather was accomplished at double the speed and took 5 hours less time. Find the speed.

    asked by Sahara
  26. Math

    Please help me with this math problem. A woman is given a loan of $20,000. for 1 year. If the instrest charged is $800, the was was the intrest rate on the loan? To get the answer I set the problem up like this: R= 800/20,000= 25(1/100)= 25/100= 25% but I

    asked by Angela
  27. science

    do disagree with the increase dependence on nuclear power to solve U.S. energy problems?

    asked by mayday 1
  28. Social Studies

    Explain the economy of China. Include goods and services, resources, trade, and division of labor. no wikipedia

    asked by Dee
  29. chemistry

    What mass of NaCl should be found in 0.51 L of a saturated solution of sodium chloride if the Ksp of NaCl is assumed to be 1.5 x 10-5?

    asked by Johnathan
  30. science

    what is the relation between volts and amps?

    asked by lucy
  31. Math

    The width of a swimming pool is 18.5 ft, and the length is 10.75 ft. Write the ratio of length to width as ratio of whole numbers. Is the right answer 5/9?

    asked by Angela
  32. precalculus

    find the trigonometric form of the following number: -7 + 4i I keep getting the wrong answer for these questions. mine was: square root of 65 (cos330.255 degrees + sin330.255i degrees)

    asked by bill
  33. econ

    True or False? E=exchange rate Suppose E$/euro = 3/2 and E$/pound = 2 and there is no trade friction, the no arbitrage condition implies that E pound/euro = 2

    asked by wilde
  34. science

    do you agree with the find and develop more domestic supplies of oil to solve the U.S. problems?

    asked by mayday 1
  35. Algerbra II

    What formula do you use when dealing with money and interest rates over time? Thanks

    asked by Sue
  36. chemistry

    A solution of potassium chloride has a pH of 7.81.What is the [OH-] in mol/L ? Can you please show steps I would appreciate it very much. Thank you

    asked by Amber
  37. AED

    can anyone suggest on how I could do a conclusion for this paper. Mentoring vs. Induction Programs i did my intro now. Now I need help with the conclusion

    asked by dawn
  38. Critical Thinking

    Fallacy Type Fallacy Statement Ad hominem/genetic 8. From one politician about another: “He’s a two-faced, liberal, anti-family, anti-values idealist!” Wishful thinking 15. Sure, I’ve heard that it’s better to not eat cheeseburgers every day, but

    asked by Gerik
  39. animal art

    raw sienna can best be described as a

    asked by Anonymous
  40. science

    can someone help me answer this question? How is the sickle anemia gene maintained (why doesn't it destroy itself)?

    asked by kate
  41. accounting

    what is the proper sequence for end of the month work with combination journal

    asked by Anonymous
  42. econ

    T or F, and a little explanation would be helpful. Relative PPP (purchasing power parity) is a better approximation of reality when one of the two countries is suffering hyperinflation and the other is not.

    asked by wilde
  43. french

    "a destination de New York" means the plane is going to New York or from New York?

    asked by one
  44. Pre-calc

    Simplify i^51 Im really not sure what they are saying. i to the 51ith power? Wouldnt it already be simplfied or what. It doesnt make sense to me.

    asked by Chels
  45. Genetics

    Hi, If a gene for neprilysin contains 80 000 base pairs, and neprilysin contains only 749 amino acids, can anyone explain the significance of the difference between the numbers ? Can anyone suggest a place where I can read more on this topic ? Thanks.....

    asked by Lewis
  46. chemistry-Please confirm this

    I'm pretty sure that OH- has a bond order of 1. OH+ has a bond oder of 1. confirm this please.

    asked by Tom
  47. History

    During the Renaissance, in Italy, how much money was a lot of money? (using Italian Currency. i.e Ducats, Florins....)

    asked by Danielle
  48. History

    Good afternoon, Here's my question...when were women seen as person and what is the royal comission on the status of women? Thank you so very much :)

    asked by Sabrina
  49. math

    Which rates are equivalent? A. 36 us dollars/48 canadian dollars= 54 us dollars/72 canadian dollars B. 18 us dol./24 can. dol.= 45 usdol./48 can. dol. C. 18 us dol/24 can dol.= 54 us dol/60 can dol. D. 48 us dol./64 Can Dol= 72 US dol./128 can dol.

    asked by Penny
  50. french

    As-tu repondu a la lettre se ta soeur? How would I know whether to use indirect object pronoun or the pronoun y? J'y ai repondu. or Je lui ai repondu. Sorry i don't know how to do the accents.

    asked by french
  51. science

    How is sickle cell anemia maintained in our world (why doesn't it eradicate itself)?

    asked by kate
  52. MATH

    i111. photobucket. com/ albums/ n152/ tamana_02/ Untitled. jpg Find the area of the shaded region.

    asked by Tareena
  53. Science

    Do you agree to Phase out all nuclear power plants by 2020?

    asked by mayday 1