# Questions Asked onDecember 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,

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

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

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)

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?

6. ## REPOST

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

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?

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)

9. ## science

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

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

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?

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)

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?

14. ## calculus

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

15. ## physics

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

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

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.

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

19. ## Calc

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

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?

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%?

22. ## science

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

23. ## mean, mediem, mode

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

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

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?

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

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...

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

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

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

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!!!!!!!

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.

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

34. ## VERBS .name of structure

I AM PLAYING TENNIS WITH MY BROTHER ON SUNDAY

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

36. ## science

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

37. ## math 162

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

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.

39. ## physics

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

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

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

42. ## Linear or nonlnear

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

43. ## Graphing

what are outliers and influential points in graphs dealing with data

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?

45. ## english

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

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

48. ## science

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

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

50. ## Biology

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

51. ## SOCIOLOGY

HI, WHAT IS CONFLICT THEORY?

52. ## Biology

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

53. ## science

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

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?

55. ## science

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

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?

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)

58. ## science

Why are Metamorphic rock important to our planet?

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!

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

61. ## educ-3

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

62. ## math

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

64. ## social studies

What is the payment of capital called?

65. ## nervous system

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

66. ## English

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

67. ## math

whats 49% times 50%

68. ## math

whats 49% times 80%