Questions Asked on
December 8, 2007

  1. physics

    A 1200-kg car is being driven up a 5.0degrees hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f=524N. A force F is applied to the car by the road and propelsthe car forward. In addition to these two forces,

    asked by ajo
  2. physics

    A horizontal force of 210 N is exerted on a 2.0 kg discus as it rotates uniformlyin a horizontal circle (at arm’s length) of radius 0.90 m. Calculate the speed of the discus. is the answer 9.7

    asked by joo
  3. Physics and movies

    we are supposed to relate physics to movies, and state mistakes or errors found in the movies based on physics principles. I am trying to do Willy Wonka the 1971 version...I need help trying to prove that Violets becoming a blueberry is impossible and an

    asked by Please McHelp me!
  4. Calculus 3

    Hello, Please help!! Show that the parabola y=ax^2 has its largest curvature at its vertex and no minimum curvature. (Note: since the curvature remains the same if the curve is translated or rotated, this result is true for any parabola)

    asked by JDH
  5. physics

    The radiation curve of the sun shows that the brightest light fro the sun is yellow- green. Why, then, do we see the Sun as whitish instead of yellow green?

    asked by Matt

    CAN someone please give me a good idea as how to find information for this problem: we are supposed to relate physics to movies, and state mistakes or errors found in the movies based on physics principles. I am trying to do Willy Wonka the 1971

    asked by Please McHelp me!
  7. physics

    Suppose that sunlight falls both on a pair of reading glasses and on a pair of dark sunglasses. Which pair of glasses would you expect to become warmer?

    asked by Matt
  8. multivariable calc

    Please help! Find the point where the curve r(t) = (12sint)i -(12cost)j +5k is at a distance 13pi units along the curve from the point (0,-12,0) in the direction opposite to the direction of increasing arc length. (Hint: ty -13pi for arc length)

    asked by Chris
  9. science

    A total solar eclipse is visable anywhere the Moon's umbra ? the earth?

    asked by connie
  10. Physics

    A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic frictions are 0.23 and 0.12 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the

    asked by Lindsay
  11. science

    what happens to your internal organs if you swallow acids or bases? what happens to your skin if it comes in contact with bases and acids?

    asked by anonymous
  12. algebra

    Find the slope of any line perpendicular to the line through the points (0,5) and (-3,-4) Write the equation of the line passing through each of the given pairs of points. Write the answer in slope-intercept form, where possible. (-1,3) and (4,-2)

    asked by anonymous
  13. Math

    I still do not understand how to solve the following problem. Please show step-by-step. x = Integral (0 to v) dv/(q^2-v^2) where q = constant the answer is --> x = 1/2q ln (q+v/q-v) 1) Where 1/2q came from? 2) Where ln came from? Is there a formula for it?

    asked by Anthony
  14. calculus

    calculate ă/Äx and ă/Äy. ƒ(x,y) = xy² + x²y

    asked by Anibal
  15. physics

    Why will a magnet attract an ordinary nail or paper clips but not a wooden pencil?

    asked by Anonymous
  16. Waves (Physics)

    I have trouble with these 2 problems, can anyone assist me to answer them? 18) What is the speed of a periodic wave disturbance that has a frequency of 3.50 Hz and a wavelength of 0.700 m? 21) A periodic longitudinal wave that has a frequency of 20.0 Hz

    asked by Wenmar
  17. Essay Help

    I have to do an 2-page essay on "Carbohydrates". I need help on outlining the essay. Anyone can give me assistance on that? Thanks.

    asked by Wenmar
  18. sci 275

    provide a brief summary differentiating conservation and preservation. do you believe that human can harvest forest resources in a environmentally friendly way/ or should national forest be left in their natural state in which resources are not used to

    asked by anaya
  19. Calc

    How do you factor -2x^2+60x-120. I got -2(x^2-30x+60) but I need to factor it further.

    asked by Britt
  20. Biology

    The Irish survived for generations by eating potatoes as their main staple. What is the main biomolecule in potatoes that allowed them to do that and what is its primary function for the potato plant?

    asked by Brittany
  21. math

    Stan invested $5,000, part at 8% and part at 17%. If the total interest at the end of the year is $490, how much did he invest at 8%?

    asked by Anonymous
  22. science

    What kind of a dull disk does the moon appear as during a lunar eclips?

    asked by connie
  23. mean, mediem, mode

    Whay is the mean , mediem and mode in a series of number?

    asked by Sabrina
  24. English

    I have to write a final paragraph for this story.Please help! Battle of Manassas By Callie Hackett Everbody thouht that today,July 21,was going to be a wonderful day,since we were going to have a quick and easy battle,but that all changed.That morning I

    asked by Callie
  25. Reading

    I'm currently reading a novel and I want to learn how to speed read through it and still remember the info I have read. Anyone know how I can do that?

    asked by Wenmar
  26. English Grammar

    1. Ignore the words in-between because they do not affect agreement. 2. If the two subjects are joined by ¡°and¡±, the verb will be plural in most situations except that when the joined subjects are preceded by ¡°every,¡± ¡°no,¡± or

    asked by John
  27. reflective journal

    my teacher gave us an assignment about the ff: perceptualism conceptualism behaviorism developmentalism how will i start my reflective journal??? please help me...

    asked by klar maesen
  28. Math x-int's

    How do I algebraically find the x-intercepts for this equation y = x^3 - 3x^2 + 3. I know I need to plug in y = 0 to solve for x. x^3 - 3x^2 + 3 = 0 But where do I go from there? I don't think I can factor, and I don't think I can use the quadratic

    asked by jeff
  29. Research Paper

    My topic was Jim Crow Laws. I have to write a 5 page research paper. ANY criticism would help. This my first one so its pobably very bad. Could you reveiew my first paragraph and my thesis statement: In 1890, a new Louisiana law required railroads to

    asked by Mark
  30. spin of a electron

    I have to know the spin of a electron and what I have in my notes has me confused. 1. If the # of neutrons and # protons of a element are odd the element has a whole spin # (1, 2, 3) examples given: 2 H 11 B 14 N 17 O 33 S 35 Cl (I think those are mass

    asked by ~christina~
  31. Calculus length of curve

    Hi--can anybody show me how to do this? Find the length of the curve r(t)= (sqrt2)i + (sqrt2)j + (1-t^2)k from (0,0,1) to (sqrt2, sqrt2, 0). Thank you!!!!!!!

    asked by Madison
  32. college algebra

    The graph of a power function is f(x)=kx^p, where k and p are constants. Do you expect k to be positive or negative ? Explain please.

    asked by cedric benson
  33. English Grammar

    If the subjects are joined by ¡°nor¡± or ¡°or,¡± the verb agrees with the closer subject (the last one). 1. Either you or I _____ to go there. (be) 2. Neither the prices nor the quality _____ changed. (have) (Explanation) In Sentence 1, the

    asked by John
  34. VERBS .name of structure


    asked by LEWIS

    why is Fe2O3 = Iron III oxide and FeSO4 = Iron II Sulfate

    asked by sam
  36. science

    What shape are the images that are cast on the ground as light filters through foliage during a solar eclipse?

    asked by connie
  37. math 162

    is f(x)= x^2+2^x+1 a polynomial? Explain

    asked by Steven Jackson
  38. Gov.

    Where can I find a website to answer this question: What is a current issue between Native Americans and the federal government? Identify the legislation that you think is linked to the issue.

    asked by Paul
  39. physics

    Which has the longest wavelengths-light waves, x-rays, or radio waves?

    asked by Anonymous
  40. Cal

    Find the equation of the line containing (7,11) and parallel to y=6. Find the equation of the line having x-intercept of 5 and y-intercept of -5. I know that y=mx+b, b=y-mx, and parallel lines have the same slope

    asked by Britt
  41. Excel

    How am i to Calculate the appropriate discount using the IF function with an absolute reference to the value listed in cell I1( which is 10%) for any order with a quantity of two or more; otherwise the discount is zero. Place the calculated discount value

    asked by Tiler
  42. Linear or nonlnear

    how do i tell if my graph is linear or nonlinear...

    asked by LT
  43. Graphing

    what are outliers and influential points in graphs dealing with data

    asked by LT
  44. math

    If a guy works. For every 40 hours, he gets 2 hours of vacation days added to his vacation. So, how many days of vacation does he get if he works 1446 in total?

    asked by Cilly
  45. english

    where do we see references to camelot and the arthurian cycle in our modern world....

    asked by maggie r.
  46. Business

    Should Boeing and other companies go along with China’s terms, or should they risk losing sales by refusing to transfer technology?

    asked by lee
  47. Geometry

    Please help me! I have a proof that is very difficult

    asked by Ashley
  48. science

    MgCl2 = magnesium chloride FeCl3 = Iron chloride why is cl on one with a 2 and on the other with a 3 Thanks

    asked by sam
  49. financial management

    This si a question I have to answer and am not sure of the answer and would like to work with someone on this can i write with anyone through email so i can send my attachment without going through here for maybe another class mate to see? Discuss net

    asked by alley
  50. Biology

    What is a qood website for free high school science fair project ideas that can be done very quickly?

    asked by ishka


    asked by RAY
  52. Biology

    Why does eating excess carbohydrates or proteins cause you to gain fat?

    asked by Brittany
  53. science

    In the first phase of any solar elipse what begins covering the Sun?

    asked by connie
  54. culture

    Why are some countries reluctant to have contact with other cultures? What do these countries lose by limiting contact with other cultures? What do they gain?

    asked by Virginia
  55. science

    explain how the processes of erosion, deposition, and cementation affect the rock cycle?

    asked by nana
  56. science

    What if one type of rock was missing from the rock cycle. How would the absence of this rock affect the earth's crust and other geologic formation on our planet?

    asked by nana
  57. algebra

    Rewrite into standard form (0,5), m=-3/5. Write the equation of the line passing through each of the given pairs of points. Write the answer in slope-intercept form, where possible. (2,-3) and (2,4)

    asked by anonymous
  58. science

    Why are Metamorphic rock important to our planet?

    asked by nana
  59. Cal

    circle x^2 +y^2 = 1. r(t) = (sint)i +(cost)j at both pi/4 and pi/2 Find velocity & acceleration Thx!

    asked by Jaime
  60. math

    Hi This is a three-part question: a. the graph y = f(x) in the xy-plane has parametrization x=x, y=f(x), and vector formula r(x) = xi + f(x)j. Use this to show that if f is twice-differentiable, then ((absvalue f''(x))/[1+((f'(x))^2]^3/2 b. use the formula

    asked by Jaime
  61. educ-3

    how can i make a reflective journal for the ff: perceptualism developmental i don't find their meaning yet...

    asked by stunning gurl
  62. math

    solve for the indicated varialbe a=1/2h(B+b) solve for b

    asked by keauanna
  63. math

    someone please help please help don't understand solve each literal equation for the indicated variable. (solve for s) d=c-s ______ n

    asked by allen
  64. social studies

    What is the payment of capital called?

    asked by derika
  65. nervous system

    a drawing of the process of sensory experiences that result to behavior in your nervous system???......

    asked by klar maesen
  66. English

    Can someone help me find a song or other piece of interpretive art that directly correlate to the king arthur legends?

    asked by maggie r.
  67. math

    whats 49% times 50%

    asked by michael
  68. math

    whats 49% times 80%

    asked by michael
  69. History

    How did J.!@#$%^& influence america?

    asked by anon
  70. Math

    Solve the simultaneous equation x+y=1 x squared + y squared=25

    asked by Greg