# Questions Asked onJuly 15, 2013

1. ## pcc

A volume of 40.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 21.7mL of 1.50 M H2SO4 was needed? The equation is

2. ## Physics

The femur of a human leg (mass 10 kg, length 0.9 m) is in traction, as shown in the figure below. The center of gravity of the leg is one-third of the distance from the pelvis to the bottom of the foot. Two objects, with masses m1 and m2, are hung using

3. ## American Literature

What do the pieces you read by Richard Rodriguez, Amy Tan, and Julia Alvarez illustrate about the immigrant experience in twentieth-century America? How are the children in these works different from their parents? Works read are: Complexion - Rodriguez;

4. ## finance

Tangshan Mining is considering issuing long-term debt. The debt would have a 30 year maturity and a 12 percent coupon rate and make semiannual coupon payments. In order to sell the issue, the bonds must be underpriced at a discount of 2.5 percent of face

5. ## maths

the distance between two stations is 340 km two trains start simultaneously on parallel tracks to each other . the speed of one of them is greater than that of the other by 5 km/hr. if the distance between the two trains after 2 hrs of their start is 30 km

6. ## college trig

find the radius of a pulley if rotating the pulley 108.03 degrees raises the pulley 37.3mm

7. ## MATH

Given that logbase2 a+logbase2 b=3 , calculate all the possible integer values of a if b is also an integer value. Explain your reasoning.

8. ## Economics

The well known nationally syndicated columnist David Broder reported the recent findings of two academic political scientists. These scholars found that voters are quite turned off by negative campaigns of politicians. Many people went as far as not voting

9. ## Calculus

Evaluate the integral below by interpreting it in terms of areas. In other words, draw a picture of the region the integral represents, and find the area using geometry. ç6 −6 36−x^2dx

10. ## Economics

Thomas Schelling, an expert on nuclear strategy and arms control, observed in his book The Strategy of Conflict (Cambridge, MA: Harvard University Press, 1960), "The power to constrain an adversary depends upon the power to bind oneself." Explain this

11. ## chemistry

Calculate the pH at the equivalence point for the titration of 0.25 M CH3COOH with 0.25 -5 M NaOH. (For CH3COOH, Ka= 1.8 â‹… 10 )

12. ## chemistry

If a hot air balloon has an initial volume of 1000 L at 70∘C, what is the temperature (in ∘C) of the air inside the balloon if the volume expands to 1900L ?

13. ## statistics

A hypothetical HIV vaccine trial involving 20,000 participants—10,000 in the vaccine group and 10,000 in the placebo group—had the following results: 6.3 infections per 1000 in the vaccine group and 9.0 infections per 1000 in the placebo group. I ran a

14. ## Statistics

The effect size in this hypothetical trial (2.7 fewer infections per 1000 vaccinated) is slightly smaller than the effect size found in the real 2009 HIV vaccine trial (2.8 fewer infections per 1000 vaccinated); so why is the p-value smaller? The

15. ## physics

how long does a car with and acceleration of 2.0m/s2 take to go 10m/s to 30 m/s.

16. ## math

Two radar stations at A and B, with B 6 km east of A, are tracking a ship which is generally to the north. At a certain instant, the ship is 5 km from A and this distance is increasing at the rate of 28 km/h. At the same instant, the ship is also 5 km from

17. ## chemistry

How many grams of NaOH would be needed to react with 199 g of HCl? NaOH + HCl --> NaCl + H2O

18. ## chem

What mass of KCl in grams is formed when 2.00 lbs of KC103 is decomposed? KClO3 --> KCl + O2

19. ## chem

Calculate the mass in grams of carbon needed to produce 160 g of CO2 in burning: C + O2 --> CO2

20. ## Calculus

Find the point on the line 7x+5y−2=0 which is closest to the point (−6,−2).

21. ## economics

are there any current subsidy or welfare issues that are being discussed or addressed in parliament or in municipalities

22. ## Calculus

For the function f described by the following table, estimate ç40 0 f(x)dx using the following. Enter each answer as a sum to show your work. 5 left rectangles 5 right rectangles 5 midpoint rectangles x 0 4 8 12 16 20 24 28 32 36 40 y 7 -46 -50 45 -7

23. ## Geography

I don't get any of it! Assume that a parcel of air is forced to rise up and over a 6000-foot-high mountain (see page 79 in the Laboratory Manual). The initial temperature of the parcel at sea level is 76.5°F, and the lifting condensation level (LCL) of

24. ## chem

Once made by heating wood in the absence of air, methanol (CH3OH) is now made by reacting carbon monoxide and hydrogen at high pressure: CO(g)+2H2(g)→CH3OH(l) How many grams of CH3OH can be made from 40.0g of CO if it all reacts?

25. ## algebra

A bank teller has 35 bills in \$5, \$10, and \$20 denominations. The total value from these bills is \$370.The total number of \$10 bills and \$20 bills is 7more than the number of \$5. How many bills of each denomination?

26. ## Economics

When McDonald’s Corp. reduced the price of its Big Mac by 75 percent if customers also purchased french fries and a soft drink, The Wall Street Journal reported that the company was hoping the novel promotion would revive its U. S. sales growth. It

27. ## algebra

Solve the system using elimination X+3y=5 4x+4y=4 I tried to work this problem and this is what I came up with. x+3y=5 x+4y=20 7y=15 y=7/15 and x= (5+y)/4 (5+7/15)/2 2/15 x=2/15 x=2/15, y=7/15 I would like for someone to check to see if it is correct.

28. ## Math

alex estimates that if he lies in the sun for k hours it will take him (10+10k) to get to sleep at night because of the sunburn . If Alex wants to get as much sun as possible without taking more than half an hour to get to sleep, how many HOUR CAN he lie

29. ## math

according to ohm's law the current I is equal to the voltage V divided by the resistence R

30. ## velocity

what does velocity mean in physics?

31. ## algebra

A non toxic floor wax can be made from lemon juice and food grade linseed oil. the amount of oil should be twice the amount of lemon juice. how much of each ingredient is needed to make 36 ounces of floor wax. let x represent the number of ounces of lemon

32. ## Calculus

Consider the function f(x)=(8)/(x^2)−(8)/(x^5) . Let F(x) be the antiderivative of f(x) with F(1)=0. Then F(2) equals ?

33. ## algebra

2 12(p+1) +13(p+1)+3 could this be done in quadratic form? the the (p+1) after 12 is cubed.

34. ## English

1. Last year, we had a school festival in fall. I couldn't join the school festival because I was sick and absent from school. 2. Last year, we had a sports day. I couldn't join the sports day because I had to go abroad with my parents. (Would you check

35. ## Algebra

Determine whether the equation defines y as a function of x. y=-17

36. ## MATH

Consider the expression logbase5 a=n a) For what value(s) of a will n be a positive number? b) For what value(s) of a will n be a negative number? c) For what value(s) of a will n be undefined?

37. ## English

1. Sightseeing is best done either by tour bus or by bicycle. 2. Sightseeing is best done either by tour buses or by bicycles. 3. Sightseeing is best done either by a tour bus or by a bicycle. 4. Sightseeing is best done either by the tour bus or by the

38. ## alg2 check?

solve for n:6(5n-1)=2(15n-3) I got 30n-6=30n-6 but I think I was suppose to keep going but don't know how. Do I divide or multiply

39. ## Math

3,4,9,12,16,18 two integers are related if they share a factor other than 1. which of the following numbers is related to every number in the list above. A 10 B 9 C 6 D 4 E 3 Is it 10? Since like 30,40,90,120,180 all have factor of 10?

40. ## Math

if the sum of the positive integers x and y is 12 then x can be equal to all of the following except 5y 4y 3y 2y y

41. ## English

Where did you go? I went to Gwangalli Beach. When did you go? I went there about two weeks ago. How did you get there? I took a bus to get there. What did you do there? I changed clothes and ran into the water to swim. I took a banana boat with my friends.

42. ## MATH

Consider the expression logbase5 a=n a) For what value(s) of a will n be a positive number? b) For what value(s) of a will n be a negative number? c) For what value(s) of a will n be undefined?

43. ## geometry

Determine the value of x for which a || b if m

44. ## MacroEconomics

1. The money supply is \$1 trillion,the price level =2,and real GDP is \$5 trillion in base year dollars. What is the income velocity of money ?

45. ## math

After selling 160 copies of the program to a school play, an usher had fewer than 40 copies left. how many copies of the program did the usher have originally?

46. ## algebra

A store sold 29 sweatshirts. White ones cost \$ 9.95 and yellow ones cost \$ 11.50 If \$ 305.05 worth of sweatshirts were sold, how many of each were sold. Let x=the number of white sweatshirts Let y= the number of yellow sweat shirts Complete the system of

47. ## Economics

Some states have had laws restricting the sale of most goods on Sunday. Consumers, by and large, oppose such laws because they find Sunday afternoon a convenient time to shop. Paradoxically, retail trade associations frequently support the laws. Discuss

48. ## Math

In triangle ABC, D is the midpoint of BC. E is the foot of the perpendicular from C to AD. If CD=7√,DE=3√, what is the measure (in degrees) of ∠BED?

49. ## chemistry

If a 8.6195 g of a mixture which contains (20.0 % of CuSO4.XH2O and 80.0 % of sand) was heated in a crucible then cooled in the desiccator the mass obtained was 7.9976 g. a- Find X the number of water of hydration in the Hydrate (CuSO4.XH2O) (MM of CuSO4 =

50. ## science

give an example of how the cells structure relates to its function in the body.My answer is the structure of the cells determine its function. Am i correct. Thanks

51. ## chemistry

How many moles of H2O are needed to react with 15.0g of CaO forming Ca (OH)2? CaO + H2O --> Ca (OH)2

52. ## english

i need to write an essay on 'the day your neighbour asked you to look after her young baby while she went to market.' please give me some ideas.....

53. ## math

A house and a lot together cost more than \$86,000. The house costs \$2000 more than six times the costs of the lot. How much does the lot cost by itself?

54. ## chemistry

i find it confusing on how to do this question.. what mass of solute is needed to prepare 400 mL of 0.850 M CuSO4 from CuSO4.5H2O

55. ## chemistry

When 30.0g of aluminum reacts with HCl, how many grams of aluminum chloride are formed? Al + HCl --> AlCl3 + H2

56. ## math

Andrew's salary is \$1200 a month plus 4% commission on all his sales. What must the amount of his sales be to earn at least \$1600 each month?

57. ## Statistics

The Centers for Disease Control (CDC) collects yearly statistics on drinking behavior in the United States by surveying a random sample of U.S. adults. The following data display the percent of adults aged 18 years and over who had 5 or more drinks in 1

58. ## economics

what are the costs and consequences of providing the subsidies and welfare

59. ## Physics

You bounce on a huge trampoline and start oscillating up and down with a period of 3 s. After a long while, you come to rest but the trampoline below you is displaced below its natural height. How much is the trampoline bent in m? Model the trampoline as a

60. ## english

need to write a short essay on 'describe a trip you took with your family or friends. It could be to another state, another town, or to a store. You should talk about what happened, why, and when.'

61. ## English

1. I videotaped the scenery. 2. I made a video with the scenery. 3. I made videos regarding the scenery. 4. I made the video about the scenery. (Which expressions are grammatical? Thank you for your help.)

62. ## Vocabulary

The ____ definition of glommy is dismal or depressing A. connotative B. denotative A

63. ## Math

Let ABCDEF be an equiangular hexagon with perimeter 98 such that EF=2CD=4AB and BC=2FA. What is the length of EF?

64. ## physics

how much work is needed to stop a 20g bullet moving with a speed of 150 ms-1

65. ## MATH

Explain the difference between cos^-1x and (cos x)^-1

66. ## Economics

How is risk and uncertainty related in economics?

67. ## Math

How many {(1,1),(1,−1),(2,0)}-lattice paths are there from the point (0,0) to the line x=8? Details and assumptions A lattice path is a path in the Cartesian plane between points with integer coordinates. A step in a lattice path is a single move from

68. ## social studies

Can someone tell me if this is correct my answer has ( ) around it The Articles of Confederation called for which of the following? A. The Northwest Ordinance B. A chief executive (C). A single legislative body D. The right of the legislature to assess

69. ## english

1-have you ever searched for information on the internet?Describe the process you used. 2-Is information from the internet as good as information from a library?explain>

70. ## Algebra

Is the cube root of -1/1000 q^36 -1/10q^12? Am I right?

71. ## science

a ballon is filled with hydrogen at given pressure at 20 degree celsius .what fraction of gas will escape out of the ballon if temperature rises to 40 degree celsius at constant pressue.

72. ## englis novel

in gulliver travels how swift laughs at the weakness of people in the contemporary society

73. ## Physics

You have a piece of copper with a volume of 2 cm3, and wish to form a wire having a resistance of 0.15 ƒ¶. How long should the wire be if the resistivity of copper is 1.72 ~ 10-8 ƒ¶. m?

74. ## Statistics

A batch consists of 20 bad apples and 80 good ones. What is the probability of selecting 2 good apples when two are randomly selected if the first selection is replaced before the second is made?

75. ## chemistry

A thermometer scale is calibrated (marked off) in a degree Celsius from 1 oC to 50 oC. Determine how many significant figures should be used to express the outdoor temperature if the temperature is more than 1 oC and less than 10 oC: (A) 1 (B) 2 (C) 3 (D)

76. ## MATH

Given that x=logbase3 5 and y=logbase3 2 , rewrite logbase3 60 in terms of x and y.

77. ## comp/155

I am having problems writing a essay and not really sure how to start.

78. ## Math

When a ball is thrown in the air at 15mps from a height of 1 ft, how long does it take for the ball to hit the ground?

79. ## MATH

Determine an equation of a sinusoidal function that has a maximum at (5, 4) and a minimum at (2, -10).

80. ## CURRENT PROCD TERMN CODING

wHAT IS THE CODING SYSTEM PHYSICIANS USE TO FILE THEIR CLAIMS

81. ## math

Define a variable and write an inequality for each of the following. A. When 3 times a number is decreased by 8, the result is at least 2 times the number. B. Ignatz, the Airedale, and Angus, the Scottie, collect bones. Ignatz has 5 more than Angus. They

82. ## French

What is the difference between "J'ai faim" and "Je suis faim?" By looking at different sources, I found out that most people say "J'ai faim," although I wanted to know if there was anything wrong with using the latter.

83. ## physics

Can a plane mirror ever form real image?

84. ## Math (algebra)

Let x and y be real numbers satisfying 4x^2+5y^2=1. Over all such pairs, let the maximum and minimum values of 2x^2+3xy+2y^2 be M and N respectively. If M+N+MN=a/b, where a and b are coprime positive integers, what is the value of a+b?

85. ## alg 2 check?

1.)solve for n:-7n-21=-63 my answer: n=3 is this correct? please explain 2.)identify the x and y int for te equation 3x-4y=12.

86. ## Math

Brilli the ant has a block of cheese that is in the shape of an equilateral triangle. She is hosting a party, and has invited her two-legged house mates. She insists that all of her guests get a piece of cheese that is in the shape of an isosceles

87. ## american history

Under the _______ system, Spanish conquistadors were rewarded with local villages and control over the local labor force

88. ## MATH

solve for theda given 0

89. ## Math-Algebra

^4√(d-3e)^2 (fourth root of (d-3e)^2)

90. ## MATH

Given that x=logbase3 5 and y=logbase3 2 , rewrite logbase3 60 in terms of x and y.

91. ## MATH

For what value(s) of x does logbase2 (logbase3 (logbase4 x))=0

92. ## simple math

simplify (2x+y)^2 x=2 right? help please

93. ## Math

when a number is multplied by itself the result is equal to 7 times twice the number. What is one possible value of the number So n^2= 7 x 2n? Then can't 0 be one?

94. ## Math

Are these true or false? 1. If s is negative, then the square root of s^2 is -s. 2. If r is positive, then the square root of r^2 is -r. 3. If q is negative, then the square root of q^2 is q. 4. If p is positive, then the square root of P^2 = p. If

95. ## IT/205

Read “The U.S. Census Bureau Field Data Collection Project: Don’t Count On It” beginning on p. 413 of Essentials of Management Information Systems. Answer the following questions in 200 to 300 words: Dose this mean each question 200 to 300 word or

96. ## HIS204

can anyone help on this first quiz?

97. ## Math - Algebra

What is the tenth root of 16u^2v^4wx^5? Note that the exponent of v is 4w.

98. ## math

3/4-1/2n=4/5 Please don't give me the answer, just show me the steps to solve it

99. ## economie

are there any welfare or subsidy payments that šhould be reviewed or added

101. ## alg 2 check?

The polynomial 15xy+3x^3y^4 is what degree? I do not understand how to solve this

102. ## Elementary mechanics

Given that the mass and radius of jupiter are respectively 190000000kg 7150000km.Calculate the escape velocity from the surface of the planet(a)11.2 km/s(b)33.3km/s(c)59.5km/s(d)110.4km/s

103. ## Math

How do I find the Prime Factorization for the number 2002?

104. ## math

The length of a rectangle is 7 cm longer than the width. The perimeter is no less than 38 cm. Find the smallest possible dimensions of the rectangle.

105. ## math

The sum of two numbers is not more than 56. One number is six times the other. Find the greatest possible values for the numbers.

106. ## psy

suppose you wanted to do research on how best to gradually charge the behavior of a fearful child. Which of the following theorist are you likely to come across in your resarch

-6=4x/7+2