# Questions Asked onJuly 15, 2011

1. ## math

Calculate the consumers' surplus at the indicated unit price p for the demand equation. HINT [See Example 1.] (Round your answer to the nearest cent.) p = 150 − q; p = 30

2. ## chemisrty

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt). 2Na(s) + Cl2(g) 2NaCl(s) If 3.6 moles of chlorine react with sufficient sodium, how many grams of sodium chloride will be formed?

When pi/2

4. ## chemistry

How many grams of CuCl2 are required to make 75 mLof a 0.20M solution?

5. ## science**

many birds eat butterflies for food. however, the monarch butterfly has a bad taste and is therefore avoided by birds. the viceroy butterfly looks very much like monarch butterfly, but it does not taste bad to the birds. tiger swallowtail butterflies do

6. ## chemistry

How many grams of KMnO4 should be used to prepare 2.00 L of a 0.500M solution?

7. ## Math-Algebra 1

The price of a gallon of unleaded gas has dropped to \$2.80 today. Yesterday's price was \$2.87 . Find the percentage decrease. Round your answer to the nearest tenth of a percent.

8. ## Physics

A 10kg ball ‘A’ moving at a speed of 8m/s collides with a 20 kg ball B initially at rest. After The collision, the balls A and B move along the direction of 30 & 45 respectively with the initial direction of motion of A. Find the final speed of balls A

9. ## science**

which of the following situations would be mist similar to an electrical current passing through a metal wire in a closed circuit? A. hot water moving through a pipe B. an automobile traveling through a tunnel C. an airplane flying through clouds D. a

10. ## science**

what is the best course of action to follow after receiving a preliminary weather advisory of hazards such as tornadoes, hurricanes, or serve storms? A. evaluate your home after disconnecting water and gas lines B. move into a basement or cellar with

11. ## Physics

A horse pulls on a crate with a 1,000 N force, causing it to move at constant velocity. What is the acceleration of the cart? A 44-kg child steps onto a scale. What is the magnitude of the force that the scale exerts on the child

12. ## science**

which of the following situations would be mist similar to an electrical current passing through a metal wire in a closed circuit? A. hot water moving through a pipe B. an automobile traveling through a tunnel C. an airplane flying through clouds D. a

13. ## Math-Algebra 1

Pablo has scored 64, 77, and 82 on his previous three tests. What score does he need on his next test so that his average (mean) is 79?

14. ## science

The specific heat of solid gold is 0.13J/gC.How much heat is needed to raise the temperature of 25.0g of gold from 23C to its melting point at 1063C

15. ## Math

Write the compound statement in symbols. Let r = The food is good, p = I eat too much, q = I'll exercise. If the food is good and I eat too much, then I'll exercise.

16. ## chemistry

What volume of 0.25M solution can be made from5.0 gof KCl?

17. ## englirsh

what is the function of the expression what made her choose me

18. ## Chemistry

which of the following quantities is not required to calculate the amount of heat energy required to heat water from 25^OC to 55^OC? A-the mass of water sample. B-the initial temp. C-the heat of vaporization for water. D-the final temp. E-the specific heat

19. ## Physics

A charge q =+ 4.11 x 10 - 9 C is placed at the origin, and a second charge equal to -2q is placed on the x axis at the location x = +1.00 m. (a) Find the electric potential midway between the two charges. (b) The electric potential vanishes at some point

20. ## Physics

In successive experimental measurements, the refractive index of a glass turned out to be 1.54, 1.45, 1.53, 1.56, 1.44, 1.54. Calculate: i. Mean refractive index ii. Mean absolute error iii. Fractional error iv. Percentage error

21. ## biology

How is bacterial cell different from an onion peel cell ?

22. ## Math-CONFUSING!!

Write the compound statement in symbols. Let r = The food is good, p = I eat too much, q = I'll exercise. If the food is good and I eat too much, then I'll exercise.

23. ## science: chemistry

When a sample of potassium nitrate is heated, oxygen gas is produced. This gas, collected in a 750 milliliter flask, has a pressure of 2.8 atmosphere and the temperature is recorded to be 53.6°C. How many moles of oxygen gas are produced in this reaction?

24. ## science: chemistry

How much faster will neon effuse than krypton, given that the molar mass of krypton is 83.8 grams and that of neon is 20.18 grams?

25. ## Physics

An automobile travelling with a speed of 60km/hr, can apply brake to stop within a distance of 20m. If the car is going twice as fast then calculate the stopping distance and stopping time? (b) Given R1 = 5.0 ± 0.2 and R2 = 10.0 ± 0.1. calculate the

26. ## biology

in what way are chloroplast and mitochondria

27. ## MATH

FIND A PERIMETER OF A TRIANGLE WHERE ONE SIDE IS 2 INCHES, ONE SIDE IS 6 INCHES, ANOTHER SIDE IS 10 INCHES???

28. ## College Algebra

A farmer has 100 yeards of fencing with which to enclose two adjacent rectangular pens both bordering a river. The farmer does not need to fence the side with the river. What should the dimensions of the two pens together (a rectangle) be in order to yield

29. ## Physics

A particle of mass 1.6 x 10-27 kg is revolving on a circular path of radius 10cm under the Influence of a centripetal force of 2.5 x 10-12. Find out the angular velocity?

30. ## Algebra

An initial investment of \$1000.00 is appreciated for 5 years at 15% interest compounded semiannually. How much money is in the account after the period ends?

lines 44, 48, 54, and 60: 44-It had to smell like oil, like metal and often like the sacks of fertilizer stacked in the back room 48-it had to have unstained wood floors, sometimes sprinkled with sawdust, and high cabinets bolts, screws, nails, and small

32. ## math

Solve the following system of equations using matrices x = -2y + 6 2x + 2y = 16

33. ## Resources for Educating young Children Part 2

I was wondering if someone could please help? My questions are: 5. Which one of the following statements about adapting a curriculum to children with learning differences it true? a) when teaching mathematics, always try to relate the concept to its use in

34. ## biology

in what way are chloroplast and mitochondria similar ?

35. ## Math

An artifact was found and tested for its carbon-14 content. If 88% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years. ? yr

36. ## ethics and values

1.What is egoism? What is psychological egoism? What is the difference between the two? 2.What is the difference between utilitarianism and egoism? Need some ideas

37. ## Physics

A centrifuge is a device in which small container of material is rotated at a high speed on a circular path. Such a device is a used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum

38. ## algebra II

\$9000 is invested at 8% compounded quarterly. In how many years will the account have 20) grown to \$11,000? Round your answer to the nearest tenth of a year.

39. ## algebra 2

log 5 ã5 log7 (1/49)

40. ## algebra 2

What will be the amount in an account with initial principal \$6000 if interest is compounded continuously at an annual rate of 3.25% for 9 years?

41. ## Physics

A centrifuge is a device in which small container of material is rotated at a high speed on a circular path. Such a device is a used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum

42. ## geometry

triangles ABF and EDG are congruent. triangles ABF and GCF are equalateral. AG = 24 and CG = 1/5 AB. find the total distance from A to B to C to D to E

43. ## Organic Chem

You have a bottle of cyclohexane and a bottle of cyclohexene, but they are unlabelled. Which of the following reagents would be the best choice to use to distinguish which was which? a. KOH/H2O b. KOH/CH3OH c. CH3ONa/CH3OH d. CH3CH2ONa/CH3CH2OH e.

44. ## biology

in what way are chloroplast and mitochondria similar ?

45. ## algebra 2

Rewrite as a single logarithm. 5 logb m -6/5 logb n +1/3 logb j - 2 logb k

46. ## algebra

10 cm^3 of a normal specimen of human blood contains 1.2 g of hemoglobin. How many grams does 17 cm^3 of the same blood contain?

47. ## Math

Determine which, if any, of the three statements are equivalent. Give a reason for your conclusion. I) If the garden needs watering, then the garden does not need weeding. II) Either the garden needs watering or the garden does not need weeding. III) If

48. ## math

can please somebody check my answer: Q. A tuning fork produces a sound that has a wavelength of 136 centimetres. What is the frequency of the tuning fork? (Take the speed of sound to be 340 metres per second.) A. f= velocity/wavelength f= 340/1.36 f=250Hz

find m

50. ## biology

1 mole of an element or compound contains 6.20 times 10 to the 23rd power atoms or molecules of the element or compound. 1 mole of an element or compound has a mass equal to its mass number (or molecular weight) in grams. For example, 1 mol of hydrogen gas

51. ## math

List the terms, coefficients, and degree of the following polynomial: 7x^4 – 3x^2 + 5x + 2/3 Can someone help me with this please. Thank You! :)

52. ## Organic Chem

I had posted this question yesterday morning at 4:58am. Any possibility someone can help? I just completed a lab called "Acid-Catalyzed Dehydration of an Alcohol: Synthesis of 2-Octenes." I started with 2-octanol and the lab instructions said the product

53. ## geometry

A square measures 18feet 6inches in length. If an octagon is inscribed in the square, then how long should each side of the octagon be?

54. ## Math

Multiply: Try to recognize the type of product to be multiplying. (x-4x^3)^2

55. ## Math

Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.19 10-6 watts/cm2 D= ? db

56. ## Math

If the argument below is valid, name which of the four valid forms of argument is represented. If it is not valid, name the fallacy that is represented. If I catch the bus on time, then I am not late to work. If I am not late to work, then I will get a

57. ## Chemistry 2

An aqueous solution of CuSO4 has a density of 1.3g/ml and is 1.16 molal. Calculate the Molarity of this solution.

58. ## Math

Create a Euler diagram to determine whether the syllogism is valid or invalid. Some musicians stay up late. Greg is a musician. Greg stays up late.

59. ## Math-this 1 is confusing :(

Given p is true, q is false, and r is false, find the truth value of the statement (q ^~r) ->~p.

60. ## biology

a student used water as a medium in a temporary blood stick. he could observe only ruptured cell under microscope. why doese this happen ? plzzzz tell flash.

61. ## Physics

A charge +Q and -2Q were placed on first and third of three very large parallel plates. The middle plate is earthed. Find the chargeon right extreem plate

62. ## computers/it

2011-07-15 18:30:34: DB Settings - ORACLE_HOME was located and set to E:\ORACLE\ORA92 2011-07-15 18:31:04: Failed to connect to DBSettings Service instance 2011-07-15 18:31:04: Failed to connect to the settings service, aborting login...

63. ## Math-Algebra

Consider the line 9x+4y=-9 What is the slope of a line parallel to this line? What is the slope of a line perpendicular to this line?

64. ## math

Shark teeth are shape like a triangle. The height of a certain shark is 2cm longer than the base. The area is 24cm^2. Find the height and base

65. ## Health

I am having trouble understanding this. I am writing a paper on childhood obesity and I am to cover the following: Ethical and legal considerations How population characteristics influence vulnerability. Could you put in simpler terms. Thank you.

66. ## Math

The half-life of 234U, uranium-234, is 2.52 105 yr. If 97.7% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed? ? yr

67. ## Math

Determine the exact value of: sin30° + cos225° + sin150° + cos330°

68. ## Math

Determine which, if any, of the three statements are equivalent. I) If the carpet is not clean, then Sheila will run the vacuum. II) Either the carpet is not clean or Sheila will not run the vacuum. III) If the carpet is clean, Sheila will not run the

69. ## MATH

cos(x)=2 and sin(x)=5 Thanks for your previous answers mathmate. No. It's not a typo. I was wondering if someone could explain to me when in real life would I need to solve such problems, or similar, besides answering problems from a textbook. When ever I

70. ## algebra

dr Jones saw 824 patients on the first year of his practice, the second year he saw 1024 patient, what would be the increase in ratio????

71. ## Physics

How does an object's speed affect its aerodynamics. How can these aerodynamics be optimized?

72. ## English

1) My sister is going to spend three weeks, from 4 August to 24 August in the USA. 2)In particular, they will be visiting Disneyworld first, then they'll be flying to Yellowstone Park and finally they will round off (?) their journey with a three-day stay

73. ## expo 105

true or false The students as well as their teacher are excited about the up coming trip to italy

74. ## 218

Engage in some Internet-based research on the relationships between the technical production aspects of film and television. What specific visual film techniques do you see utilized in contemporary television

Find m

76. ## MATH

2+3x10 DIVIDED BY 5x3-9= ????

77. ## MATH

FIND THE AREA OF A TRIANGLE IF THE BASE (b) IS 9 INCHES AND THE HEIGHT (h) IS = 12 INCHES???

78. ## MATH

SIMPLIFY: 2+3x10/5x3-9=???

79. ## HSM260

Forecast personnel expenses for fiscal year 20X5 using moving averages, weighted moving averages, exponential smoothing, and time series regression. For moving averages and weighted moving averages, use only the data for the past three fiscal years. For

80. ## Math

Construct a truth table for (p ^q) ->~q

81. ## anatomy and physiology 1

describle two vision disorders that cause abnormal eyeballshape.

82. ## Psychology/Statistics

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size - 3. Use the formula sqrt(N^ 2/S)

83. ## Psychology/Statistics

For each of the following samples that were given an experimental treatment test whether these samples represent populations that are different from the general population (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

84. ## algebra 2

Use the properties of logarithms to evaluate the expression. 5 log5 (7x)

85. ## Math

Divide and Check 4x^4y-8x^6y^2+12x^8y^6 _______________________ 4x^4y

86. ## algebra 2 logaithms

Use the properties of logarithms to evaluate/simplify the expression. 1. 5^log(7x) 2. 10^x + 2 log(x)=x+2 or log(x)=x-2 ????

87. ## precalc

How would you find the inverse of these two functions: f(x)=4/(x-4)^2 and f(x)=x^2-8x+16 could you please show me step by step i have been trying to figure it out for hours.

88. ## Math

Write the argument below in symbols to determine whether it is valid or invalid. State a reason for your conclusion. Specify the p and q you used. Either the gazebo is made of wood or the vine is growing on the gazebo. The gazebo is not made of wood. The

89. ## College Math

Given the following sets select the statement that is NOT true. A=(l,a,t,e,r) B= (l,a,t,e) C=(t,a,l,e) D=(e,a,t)E=(t,e,a) E=D E=B D=A C=A D=B

90. ## Math

Fill in the heading of the following truth table using any of p, q, ->, ?, V, and ^. P q _____ T T T T F F F T T F F T

91. ## Math

Construct a truth table for ~q ->(p V q)

Construct a truth table for the statement. (p ↔ q) → p

93. ## Math

Multiply: (7x-2)(2x-7)

94. ## math

divide in the indicated base 2 base 3/ 120 base 3

95. ## science: chemistry

What is the temperature of a 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals?

96. ## physics

Drive an expression to calculate the tension and velocity in the motion of a vertical Circle at the 1: highest point and 2: lowest point?

97. ## arithmetic

5+(9-5)3(exponent)= 5+12=17 Is this right? When doing the practice problems I was getting the wrong answer. This is so simple, I don't get what I am not understanding...

98. ## science

is it true that When two identical waveforms of the same frequency are added together, the result will be a waveform with a wavelength that is twice that of the individual waveforms.

100. ## science

if we put a branch of any plant in coloured water thenwhat happened?if it change its color then why it happened tell the reason

101. ## Science

Were can i find a coloured diagram of a aluminum-nickel electrochemical cell?

102. ## chen

1-why should the maximum percent yield never be above 100%?

103. ## Stats

a raw score on a particular intelligence test is known to be approximately normally distributed in a population of 4th graders, with a mean of 95 and variance 81. which score has the property that there are 15% of scores in the population that are above

104. ## math

Find the first three terms of the series.