# Questions Asked onAugust 7, 2010

1. ## science

a 5.o kg book is sitting on a table. which describes the forces acting on the book? a)there are no forces acting on the book b)the net force on the book is zero Since the weight of the book is cancelled out by the support of the table. does that mean a)

2. ## college chemistry

When solutions of AgNO3 and NaOH react, the balanced molecular equation is 2AgNO3(aq) + 2NaOH(aq) Ag2O(s) + 2NaNO3(aq) + H2O(l) How much Ag2O is produced when 0.200 g of AgNO3 and 0.200 g of NaOH react?

3. ## math

The amount of corn chips dispensed into a 12-ounce bag by the dispensing machine has been identified as possessing a normal distrubution with a mean of 12.5 ounces and a standard deviation of 0.2 ounces. What porportion of the 12 ounce bags contain more

4. ## physis

The range of human hearing is roughly from twenty hertz to twenty kilohertz. Based on these limits and a value of 343 m/s for the speed of sound, what are the lengths of the longest and shortest pipes (open at both ends and producing sound at their

5. ## Microeconomics

A sporting goods store has estimated the demand curve for a popular brand of running shoes as a function of price. Use the diagram to answer the questions that follow. a. Calculate demand elasticity using the midpoint formula between points A and B,

6. ## math

In a quadrilateral ABCD, the diagonal AC bisects angle BAD and AB = BC = CD. Prove that the other diagonal, BD, bisects angle ADC.

7. ## chemistry

how many grams of 5%NaNO3 will be required to prepare 250ml solution

8. ## math

a solid alumimium casting for a pulley consists of the discs each 1 1/2 cm thick of diameters 4 cm, 6 cm,and 8 cm.a central hole 2 cm in diameter is drilled out .if the density of the alumimium is 2.8g/cm^3,calculate the mass of the casting

9. ## Chemistry

which of the following equations is the one represented by this experiment? Justify your answer by comparing the moles of iron consumed(Fe 0.139/0.0419= 3.32) and the moles of copper produced(Cu 0.0419/ 0.0419 =1) to the coefficients in the equation of

10. ## organic chemistry

which of the 3 solvent would not be suitable recrystallization solvent for acetanilide? Why? - water as recrytallization solvent for acetanilide - chloroform as recrystallization solvent for acxetanilide - methanol as recrystallization solvent for

11. ## US History

In the Watergate Scandal, I know that 5 men broke into the Democratic National Committee headquarters and Nixon did not want to give up the tapes that revealed that he wanted to cover up the break in... why? 1) Did Nixon put up the tape recording system in

12. ## science

a certain's plant root contain higher concentrations of nitrate than the soil that surrounds them. Which mechanism explains the movement of nitrates form the soil into the plant's roots? a)osmosis b)facilitated diffusion c)active transport d)filtration I

13. ## math

In a pentagon ABCDE, AB = AE, BC = ED and BD = EC. Prove that AC = AD.

14. ## math

Let ABC be a triangle such that angle ACB = 135 degrees. Prove that AB^2 = AC^2 + BC^2 + ¡Ì2 x AC x BC.

15. ## algebra

Write interval notation for the set {x|-4 < x < 4 -

16. ## sociology

Focus of the Research Paper Select one social institution family, health-care, religion, education, mass media, political, or economic (family being my choice) as defined in the text. Using the three Sociological theories listed in chapter one of the text

17. ## medicine

What is the main difference between a stem cell and a cancer cell? A. A stem cell grows at a faster rate than a cancer cell B. A stem cell obeys signals to stop growth, but a cancer cell doesn't C. A stem cell is usually external; a cancer cell is usually

18. ## biology

What is the source of energy driving the hydrolic cycle? a. evaporation of the ocean water b. heat conducted from the earth's core to the surface c. radiant heat from the sun d. air currents returning to the earth's surface I chose a) evaporation of the

19. ## elementary math

A student has a penny, nickel, dime, and quarter distributed two coins apiece to his front two pants pockets. What is the probability that the front right pocket has more than 30¢ in it?

20. ## algebra

Soybean meal is 16% protein: cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320-lb. mixture that is 14% protein?

21. ## Statistics

a random sample of 10 minature tootsie rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were 3.087, 3.131,3.241,3.270,3.353,3.400,3.411,3.437,3.477 a.) construct a 90 percent confidence intervalfor the true

22. ## asessment

a very young child takes off his socks. the caregiver puts it back on, the child takes it off again repeating it. child is engaged in play (d) (a)functional b. constructive c, rule-based d. dramatic 2. which of the foll. is best suited to a formative

23. ## math

Let P and Q be the points on the sides AB and BC of a triangle ABC respectively such that BP = 3PA and QC = 2BQ. Let K be the midpoint of the segment PQ. Prove that the area of the triangle AKC is equal to 11S/24, where S is the area of the triangle ABC.

24. ## Math

a roof rises 1.9 feet vertically and 9.1 feet horizonally. what is the grade of the roof?

25. ## Physics

A uniform solid sphere of mass 4kg and diameter 20cm initally at rest, begins to roll without slipping under the influece of gravity, down an incline that makes an angle of 15degrees to the horizontal 1 calculate the angular acceleration of the sphere 2

26. ## Inverse Functions & Trig. Equations

7. Evaluate sin[sin^-1(-1/2)]. a. 1/2 b. ð /6 c. -1/2 d. - ð /6 8. Evaluate cos[tan^-1(5/12)]. a. 12/13 b. 12/5 c. 5/12 d. 5/13 9. Evaluate cos[sin^-1(-3/5)]. a. -4/5 b. 5/4 c. 4/5 d. -3/4

27. ## MTH233/statistics UOP

You work for the public relations department of the Social Security Administration. In an effort to design better advertising campaigns, your department decides to conduct a survey to find out the opinions people in the United States have about the Social

28. ## Chemistry

Which of the following has the higher ionization energy and why: Li or Ba? I cannot figure this out because they are in different periods but Ba is down on the periodic table telling me that it may have a higher ionization than Li. Help please?

29. ## math

Thank You for taking the time to look at this. If x = 2cos^2(theta) and y = sin2(theta), show that (x -1)^2 + y^2=1

30. ## math 30 applied

A small aircraft leaves Calgary on a heading of E30deg S (30 degrees south of east) travelling 200 km/h. it is affected by a 40 km/h wind blowing toward S60deg W (60 degrees west of south). After one hour the plane’s position relative to Calgary will be?

31. ## Algebra

Five-Sixths of a number is -60. What is the number?

32. ## Statistics

Thomas economic forecasting, Inc. and Harmon econometrics have the same mean error in forecasting the stock market over the last ten years. However, the standard deviation for Thomas is 30 points and 60 points for harmon.At the .05 signifcance level can we

33. ## English 30-1

Hi there, i am writing an analytical essay for William Shakespeare's "Hamlet". My essay topic is this.... In Hamlet, Shakespeare reveals the effect of conflict on a person’s character. Write an essay demonstrating how Shakespeare uses a character's

34. ## Statistics

Here are heart rates for a sample of 30 students before and after a class break. At á = .05, was there a significant difference in the mean heart rate? Heart Rate Before and After Class Break (a) State the hypotheses. (b) State the decision rule and

35. ## english

briefly summarize the four stages of the transformational learning cycle

36. ## elementary math

How many different ways can a committee of 9 be selected from a larger organization of 20 people?

37. ## algebra

Solve by elimenation 0.3x -0.27 =4 0.2x + 0.3y = -37/17

38. ## nursing

What type of information appears in a histology report? A. Tissue structure B. Synechia C. Blood type D. Bone health I think it's C but at this point i'm guessing. I really need help!

39. ## CHEM 1B

Carboxylic acids are stronger acids than alcohols A. This is because the carboxy anion is delocalised. B. This is because the hydrogen atom is delocalised. C. The O-H bond in carboxylic acids is very strong. D. This statement is not true One characteristic

40. ## medical terminology

A patient is diagnosed with Addison's disease, which is caused by decreased functioning of the adrenal cortex. Which of the following medications may be prescribed? A. Glucotrol B. Humulin C. Solu-Cortef D. Pitressin My answer is C (i think)

41. ## Algebra

I am working on Factoring the Trinomial and need help to solve this equation: t=3t^3+22t^2+8t

42. ## Popular American Culture

Prepare a 350 to 700-word paper in which you examine trends in popular American culture. In your examination, be sure to describe at least one trend from the following areas: a. Social b. Political c. Personal d. Religious

43. ## psych

Can you tell me if I have this right? Are the major schools of psych? Structuralism, Behaviorism, Functionalism, Psychoanlysis, and Humanism? Just want to make sure I have the right ones. Thank you

44. ## math

Solve 2 + cos^2(theta)=3sin^2(theta) for 0=< theta < 360

45. ## algebra

Hockey teams receive 2 points when they win and 1 point when they tie. One season, a team won a championship with 61 points. They won 11 more games than they tied. How many wins and how many ties did the team have?

46. ## algebra

Determine whether the given numbers are a soluation of the inquality. 3,-12,-17,-1 y - 9 > 2y - 4

47. ## US History

There was this website that said that one of the conflict of Roosevelt v Supreme Court was NRA. Would NRA be the National Recovery Act? I think it is since it is related to the Roosevelt and the Supreme Court based on the websites that I searched. Just to

48. ## Chemistry

what is the final temp of the combination when 50 grams of chromium at 15 degrees celcius is added to 25 milliliters of water at 45 degrees celcius?

49. ## stats

Compute the following and show your steps 7! /5!.

50. ## math

Find the exact value of sin(cos^-1(-1/3))

51. ## math

Simplify sin(theta)* sec^2(90-theta)

52. ## medicine

A patient has unrealistic thoughts and behaviors despite an awareness that they're inappropriate. She's experiencing A. Phobia B. paraphilia C. panic attack D. obsessive-compulsive disorder I think it's D

53. ## math

Factor: x^8 + 2x^4 y^4 + 9y^8

54. ## math

For which real values of b do the equations x^3 + b x^2 + 2bx - 1 = 0 and x^2 + (b-1)x + b = o have a common root?

55. ## math

Prove that a^4 + b^4 + c^4 ¡Ý b^2ac + c^2ab holds for all real numbers a, b and c.

56. ## algebra

I am a manager at a hospital i have 1,176 hours in a week to be covered by my staff. How many 40 hour people would I need and how many 32 hour people would I need to cover the hours.

57. ## MATH

Could someone please show me how to solve this Prove tan(-theta) = -tan(theta)

58. ## medicine

A patient was admitted in an alternating state of mania and despair. What diagnosis does this statement describe? A. Obsessive-compulsive disorder B. Bipolar disorder C. Posttraumatic stress disorder D. Anxiety I'm not sure if it's B or D

59. ## math

Is it possible to arrange the integers from 1 to 240 in a table with 15 rows and 16 columns so that the sum of the numbers in each of the columns would be the same?

60. ## math

Simplify: 2/1! - 3/2! + 4/3! - 5/4! + ... + 2010/2009! - 2011/2010!, where k! denotes the product of all integers from 1 up to k, that is, 1! = 1, 2! = 1x2 = 2, 3! = 1x2x3 = 6, and so on.

61. ## math

Prove that if real numbers a, b and c satisfy a + b + c > 0, ab + ac + bc > 0 and abc > 0, then each of a, b and c is positive.

62. ## Math

Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in days, is graphed on a rectangular coordinate system where time is on the horizontal axis. Further suppose that the number of cars driven on 1st Avenue can be modeled by

63. ## Math

Could someone please show me how to solve this Prove tan(-è) = -tanè

64. ## math

how many solutions does the equation -2cosX = sqaureroot(X) have?

65. ## KIDNEY!!

The size of loop of Henle in every person is same ???

66. ## math

Gasoline is 2.79 a gallon, if you use 2 3/4 gallons a day driving to and from work, how much should you budget for 20 days? Now, would I multiply? \$2.79 x 2.75 then multiply that number by 20 days?

67. ## english

choose two age groups from different periods in to th the physical development process

68. ## organic chemistry

account the difference in the crystals formed through rapid and slow crystallization.

69. ## math

Solve x = y^3 - 4 for y in terms of x

70. ## math

Prove that if p, q, r and s are odd integers, then the equation x^10 + p x^9 - q x^7 + r x^4 - s = 0 has no integer roots.

72. ## math

P (-1.3 less than or equal to Z less than or equal 0) P (-1.3 ¡Ü Z ¡Ü 0)

73. ## US History

In Richard Nixon v. Supreme Court are the main characters only Nixon and the Supreme Court?

74. ## gemorty

what supplementry means

75. ## health

Who in the organization should be involved in performance improvement projects and why?

76. ## nursing

A patient had a cystectomy. What does the root of this word mean? A. Kidney B. Tube C. Bladder D. Meatus I chose C A pyelogram was performed on a 43-year-old patient. The root word means A. trough, basin, pelvis B. ureter, urethra C. bladder, urine D.

77. ## algebra

what is the solution set to 5x+7=22

78. ## system design

which of the following is on of the four fundamental issues IS managers must address. 1. IS Specialist salaries, career preparation, infrastructure or an organization. I think it is either Infrasture or an Organizations mission

79. ## organic chemistry

describe the crystals formed through slow crystallization

80. ## Math 157

I am having some trouble figuring out these two problems. 1. Calculate the mean, median, mode, range, and midrange for the data set given {-1, 7, 0, 14, -2, -15, 0, 8, 7} Mean=2 Median=7 Mode=0, and 7 Range= Midrange= 2. Calculate the mean, range,

81. ## English

In the New Testament, what word is used to identify letters the disciples sent to each other?

82. ## math

rewrite the statement using percent notation out of every100 eligible people 87 voted in a recent election

83. ## Math

I factored 3.6x^6+2x^6-2.8x^2+3.2x as; 3.6x^7+2x^6-2.8x^2+3.2x However my answer is incorrect. The correct answer should be; 0.4x(9x^6+5x^5-7x+8) How do I get to the correct answer? So that I am able to do similar problems, because every problem that I

84. ## Math

4 3 1 1 2 1 -2 -3 What's the pattern and the next numbers of this sequence?

85. ## algebra, adding rational expressions

2/zy^2+7/z^2y

86. ## psy/220

explan how you believe and individuals attachment style can affect the types of love relationships he or she has.

87. ## math

Prove that: 20^22 - 17^22 + 4^33 - 1 is divisible by 174.

2/3/10=1.8/r

89. ## math

P(Z greater than 2.5)

90. ## organic chemistry

what type of impurity is associated with large crystals? Explain.

91. ## Math

solve the system: y^2=1-x^2 y^2=x^2-3x+2