# Questions Asked onJuly 9, 2011

1. ## physics

15 beats are heard in 5 seconds when a piano key and a tuning fork of slightly higher frequency (440 Hz) are struck at the same time. What is the frequency of the sound emitted by the piano key?

2. ## Physics

A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that its distance from the cave wall is 19m.

Sam Monte deposits \$21,500 into Legal Bank which pays 6 percent interest that is compounded semiannually. By using the table in the handbook, what will Sam have in his account at the end of 6 years?

4. ## math

jim and alice moore decided to plant a garden with 3 hosta plants, 6 lavender plants, 60 tulips, and a dogwood. the cost of the plants is as follows: hosta- \$3.00 each or 3 for \$8.00 lavender- \$1.00 each or 3 for \$2.00 tulips- 10 for \$4.00 dogwood-\$14.00

5. ## math

Correct 0.04945 to two significant figures

6. ## Chemistry

x+y=9.0 0.50x+0.20y=3.90 What is the value of x and y?

7. ## math

simplify 2log4(9)-log2(3)

8. ## math

simplify 3^(2log3)

9. ## math

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 21 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per

10. ## Chemistry

1.The density of solid Fe is 7.87 g/cm3. What volume per atom of Fe? 2.As a solid Fe adopts a body centered cubic unit cell. What is the volume of a unit cell of this metal? 3.What is the edge length of a unit cell of Fe?

11. ## Physics

Two insulated charged metallic spheres A & B have their centres separated by a distance of 50cm in air. Calculate the force of electrostatic repulsion between them. If the charge on each is +5.0*10^-8c. The radii of A & B are negligible compared to their

12. ## GRAMMAR

Punctuate and capitalize the following sentences appropriately. 1. next year the company plans to open offices in seattle washington boise idaho and harrisburg pennsylvania ANSWER: Next year the company plans to open offices in Seattle, Washington, Boise,

13. ## Physics

I am having trouble with the last portion of this question. If someone can help me, I would sincerely appreciate it. A bicycle wheel has a radius R = 32.0 cm and a mass M = 1.82 kg which you may assume to be concentrated on the outside radius. A resistive

14. ## Chemistry

1. The vapor pressure, P of a certain liquid was measured at two temperatures, T. from this data: T(K) and P(kpa) 275 3.57 825 6.57 for the enthalpy how would this be plotted on the graph point 1: point 2: 2. What is the rise, run, and slope 3. What is the

15. ## Calculus

There are two neighboring points P and Q on the curve f(x)=x^2 (a) Determine m(h), the slope of the straight line PQ (b) The slope, S, of the tangent at P is defined as S=lim h->0 m(h). Find the value of S. (c) Use this value of S to show that the equation

16. ## accounting

Fill in the blanks in the following separate income statements a through e. Identify any negative amount by putting it in parentheses. a b c d e Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \$60,000 \$42,500 \$36,000 \$ ? \$23,600

17. ## Physics

At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 2.85m/s^2. At the same instant a truck, traveling with a constant speed of 19.0m/s, overtakes and passes the car. A)

18. ## Grammar

Determin if the following sentences are: run-ons, fragments, or correct as is. 1. Because subtle changes can reveal future abnormalities. FRAGMENT 2. The neck is prone to injury, especially with repetitive motion and awkward positioning. CORRECT as is

19. ## math

how to find which angle lies in which quadrant ex: 7pi/6 3pi/2 or any one

20. ## math

which of the following expressions shows the equation to use in finding the dimensions of cube n by n by n by n with a volume of 125? 1. n to the third power =125 2. n to the second power= 125 3. 3n=125 4.n=125/3

21. ## phy

A golfer gives a ball a maximum initial speed of 37.0 m/s. 1-What is the highest tree the ball could clear on its way to the longest possible hole-in-one?

22. ## Physics

The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women's

23. ## Chemistryor

Will Zn(NO3)2 react in a metathesis reaction with NACl, BACL2, NAIO3 or AL2(SO4)3

24. ## intermediate algebra

Simplify the following expressions, and rewrite it in an equivalent positive exponents -14x^4y^6/7x^3y^5

25. ## GRAMMAR

Determine if the following sentences are run-ons, fragments, or correct as is. 1. It is great news that the new laptop arrived yesterday after I had waited one week and I made several calls to check on it in shipping billing and invoicing. RUN-ON 2. Heart

26. ## Finance

The Do-All-Right Marketing Research firm has promised payments to their bondholders oneperiod from now that total \$100. The company believes that there is a 85% chance that the cash flow will be sufficient to meet these claims. However, there is a 15%

27. ## Grammar

Determin if the following sentences are: run-ons, fragments, or correct as is. 1. Because subtle changes can reveal future abnormalities. FRAGMENT 2. The neck is prone to injury, especially with repetitive motion and awkward positioning. CORRECT as is

28. ## chemistry 101

given the reaction: 2mg + o2-----> 2mgo . when 4.32g of oxygen react with magnesium 327kj of energy is produced. the heat of reaction for 1 mole of oxygen is???

29. ## american government

According to James Madison, the source of most interest groups or factions is

30. ## human service

Can you tell me where I might find the answer to this question. In assessing risk to benefit, on what bases do you make the ultimate determination of how much risk is acceptable and how much benefit is necessary

31. ## GRAMMAR

Punctuate and capitalize the following sentences appropriately. 1. the psychiatric resident asked the patient why she came to the hospital to which the patient replied i have no idea ANSWER: The psychiatric resident asked the patient why she came to the

32. ## math(algebra)

solve by elimination method. 5x+6y=3 10x+12y=6

33. ## chemistry

State whether each of the following will increase,decrease or unchange when catalyst is added to the reaction and give an explanation for your answer please a) rate of reaction b)activation energy c)reaction enthalpy d)equilibrium of reaction

34. ## GRAMMAR

Answer: The psychiatric resident asked the patient why she came to the hospital, to which the patient replied, "I have no idea." Answer: People in the order-processing department, you must admit, process orders promptly. I believe these are now properly

35. ## statistics

If a sample with M = 50 and s = 10, the X value corresponding to z = 1.50 is X = 65?

36. ## Chemistry

Two 20.0g ice cubes at -10.0 C are placed into 275g of water at 25.0 C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts.

37. ## Chemistry

A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? I need help in setting the problem: I got 56.21/8.3145j/mol.k(1/T1-1/T2)?

38. ## Literature

In the story Julie of the wolves, what are two lessons that Julie learns?

39. ## solving rational equations

4-a-5/a+5=a^2-15/a+5

40. ## CAL

use implicit differentiation to find the slope of the tangent line to the curve (y)/(x-7y)=x^6+5 at the point (1,6/43)

41. ## CAL

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4000 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 11500 centimeters

42. ## chemistry

When 15.0 g of steam drops in temperature from 275.0 degrees c to 250.0 degrees, how much heat energy is released

43. ## algebra 2

use analytical and graphical methods to solve the inequality. x^3+10x^2+31

44. ## Medical

Write a medical report describing the history, symptoms, and physical examination findings of a patient with pancreatitis. Make sure to include the following terms in your report. Acute Chronic Gallstones Furosemide Azathioprine CT Scan Stethoscope Amylase

45. ## intermediate algebra

Simplify. Assume that no denominator is 0 and that 0º is not considered. (5a)ˆ2

46. ## Grammar

Five sentences about the role of education in successful financial planning, using different verb tense in each sentence with the verb in bold. Can you please tell me if the following sentences are correct? My husband and I were talking about our financial

47. ## algebra

If you drive 253 miles on 11 1/2 gallons of gas, what is the simplified ratio of miles to gallons?

48. ## math

what is the arranging number from greatest to least

49. ## statistics

In this summer school class there are 28 male students and 15 female students. An experiment is done that consists of selecting a student at random, and recording their gender. This is done 4 times WITH REPLACEMENT. 1) Fill in the following probability

50. ## phy

Snowballs are thrown with a speed of 11 m/s from a roof 6.0 m above the ground. Snowball A is thrown straight downward; snowball B is thrown in a direction 20^\circ above the horizontal. 1-Find the direction of motion of the two snowballs just before they

51. ## phy

A soccer ball is kicked with a speed of 9.15 m/s at an angle of 55.0^\circ above the horizontal. 1-If the ball lands at the same level from which it was kicked, how long was it in the air?

52. ## his103

In a two- to three-page paper discuss the Mediterranean society under the Greeks and Romans. How were they alike? How were they different? How did they each influence the western world? Your paper must be in proper APA format with a separate title and

53. ## PreAlgerbra

Simplify and show work: 9x*2y+7x(4/2)

54. ## bio

explain what will happen to a sugar cube when it is placed in a sugar glass of water.

55. ## marketing

Explain the importance of an organized new-product development process and illustrate how it might b used for (a) a new hair care product, (b) a new children’s toy, and (c) a new subscribers-only cable television channel.

56. ## Physics

A football player runs the pattern given in the drawing by the three displacement vectors , , and . The magnitudes of these vectors are A = 6.00 m, B = 13.0 m, and C = 15.0 m. Using the component method, find the (a) magnitude and (b)direction of the

57. ## algebra

Simplify the following expression, and rewrite it in an equivalent form with positive exponents. 10x^3y^3 -------- 40x^-3y^-4

58. ## Chemistry

Does Na2CO3 have a methatesis reaction with NaCl, NaIO3, or Al2(SO4)3. If it does which one and why.

59. ## physics

A rocket flies upward with a velocity of 1050 km/h and at an angle of 30 degrees to the vertical. If the rocket runs out of fuel determine: (i) The maximum additional altitude, h. (ii) The corresponding time. (iii) The horizontal distance at this time The

60. ## algebra

Short answer. Raise the quanitity in parentheses to the indicated exponent, and simplify the resulting expression. Express answers with positive exponents.{-37x^-1y^-2 ^-2 {----------- 74y^3

61. ## English

Thanks for your help in English.Writeacher.I have passed my examination which is Japanese Government Scholarship examination.Your advise helped my examination.Writeacher Thank you very much.^.^

62. ## algebra

short answer. Raise the quanity in parentheses to the incated exponenet, and simplify the resulting expression. Express answers with positive exponents.{-37x^-3y^2}^-2 {148x^0y^-5} }

63. ## chemistry

ionic strength of barium chloride?

64. ## algebra

short answer. Raise the quanity in parentheses to the incated exponenet, and simplify the resulting expression. Express answers with positive exponents.{-37x^-3y^2}^-2 {----------} 148x^0y^-5

65. ## maths

how to write 9th july 2011 in 5 alphabets without using numbers?

66. ## algebra

convert to scientific notation: 0.000243

67. ## bio

explain what will happen to a sugar cube when it is placed in a glass of water.

68. ## Math 209

If a cylindrical container has a volume of cubic feet, then its surface area S in square feet (excluding the top and bottom) is given by S = s=(2π )/r where r is the radius of the cylinder. (a) Calculate S when r =1/2 foot (b) What happens to this surface

69. ## algebra

use scientific notation to multiply the following two numbers. Express the answer using scientific notation; retain all nonzero decimal places. (8.1*10^8)*(4.2*10^3)

70. ## Chemistry

Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) If 2.00 g of Mg reacts completely with 50.0 mL of HCl solution, what is the molarity of the HCl solution?

71. ## intermediate algebra

Subtract the complex expressions, and simplfy. (-4.6-2.4i)-(-7.8-10i)

72. ## Spanish

MATCHING Encuentra la definición apropiada para los siguientes términos del vocabulario. Choices A) dar por sentado B) descomponerse C) comprensivo D) el caparazon E) herir Statements to Match With Choice 1. Usualmente los amigos son así si tenemos

73. ## intermediate algebra

Simplify the following product of complex numbers (-10+3i)*(-2)

74. ## Spanish

Multiple Choice Escoge el mandato correcto para las siguientes oraciones. Nota el tono, formal o informal. 6. Chicas por favor ____ (venir) conmigo a la pelicula. No quiero ir sola. A) venid B) vengais C) vengan D) vengamos 7. Estimados senores y senoras,

Engineering Economics Essay Question: You wish to purchase a home for \$150,000 and you can put down 10% of this price as down payment. You can get a 20 year fixed rate mortgage loan for 6.0% with no points. You can optionally decide to pay 2 points to

76. ## Economics

Engineering Economics Essay 1: You wish to purchase a home for \$150,000 and you can put down 10% of this price as down payment. You can get a 20 year fixed rate mortgage loan for 6.0% with no points. You can optionally decide to pay 2 points to bring the

77. ## chemistry

How do I find out how many ml of NaOH i need to titrate H3PO4. I used the ice table to knock off the two protons but im using a .2200M NaOH and do not Know how to determine the volume needed before hand. In other words i need some pre-calculations for

78. ## intermediate algebra

Simplify the following quotient of complex numbers into the form a+bi 1+8i ---- -6+i

79. ## algebra

raise the quanity in parentheses to the indicated exponent, and simplify the resulting expression (-3x^6y)^3

80. ## intermediate algebra

short answer.Simplify the following expression,and rewrite it in an equivalent form with positive exponents. (-2x^-2)^-4

81. ## intermediate algebra

Simplify the following expressions; express in terms of i. square root-44

82. ## intermediate algebra

multiply the expressions, and simplify (-6x^-4y^4)(-2x^4)

83. ## intermediate algebra

Simplify the following expression. square root-8 square root -24

84. ## intermediate algebra

use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places (8.4*10^6)/ (5.97*10^2)

85. ## intermediate algebra

short answer: convert this number to scientific notation 1,800,000

86. ## algebra

add the complex expressions, and simplify. (1.9-7¡)+(4.2-2.3¡)

87. ## algebra

short answer. Simplify the following expressions; express in terms of ¡ square root of -25

88. ## biology

1.explain how the code that is found in the organism`s genes works 2.describe how the genetic code controls the production of proteins 3.find diagrams to help explain thankyou!

89. ## intermediate algebra

simplify the following expression square rootof -7 and square root of -105

90. ## MGM

Balancing equation Na+H2o-NaoH+H2+H2o

91. ## SraJMcGin-biology

just wanted to say thankyou :)

92. ## early childhood

Miss Powell's early childhood student are from American,French, and Japanese families whose head of household hold management,professional and executive level jobs. These families have chosen this early learning center because of its excellent reputation

93. ## statistics

A bus company official wanted to estimate the mean time for the trip between two cities. A random sample of such trips gave a mean of 152 minutes and a standard deviation of 12 minutes. Construct a 98% confidence interval for the population mean time.

94. ## math

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 21 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per

95. ## Math-geometry

This is so confusing :( Given U = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}, A = {12, 14, 16, 18, 20}, and B = {11, 13, 14, 15, 18, 19, 20}. Find A′ ∩ B′. Do not skip to the answer. Show your work, finding A’, then B’ then find their

96. ## Math-geometry

I do not understand set-builder notation..... Using correct mathematical notation and symbols, express the following in set-builder notation: Z = {16, 17, 18, 19, 20}

97. ## Education

How could constructivism be used in an integrated approach to teaching science and math

98. ## economics

Suppose that Congress enacts a lump-sum tax cut of \$750 billion. The marginal propensity to consume is equal to .075. Assuming that Ricardian equivalence holds true, what is the effect on equilibrium real GDP? On saving?

99. ## English

What is the agreement error in the sentence: Although they seemed inflamed, the site of the previous carnietomy seemed free of defect.

100. ## economics

At an initial point on the aggregate demand curve, the price level is 100, and real to GDP is \$15trillion. After the price level rises to 110, however, there is an upward movement along the aggregate demand curve, and real GDP declines to \$14 trillion. If

101. ## math

it takes 1 3/8 yards of material to make one shirt. how many shirts can be made from 16 1/2 yards ?

102. ## Algebra 1

A theater group made appearances in two countries. The hotel charges before tax in the second country were \$500 lower than in the first. The tax on the hotel bill was 5.5% in the first country and 4.5%in the second. After the trip, the total tax paid on

103. ## MATHS

Prove that one over one squared plus one over two squared plus one over three squared....... plus one over 1000 squared is smaller than two. Details please.

104. ## algebra

if sarha wants to secure a bookcase by attaching a metal strip from the upper right corner to the lower left corner how long should the metal strip be if the bookshelf is 6 foot high and 8 foot wide?

105. ## math

if paul pays the newspaper company 70% of what he collects, how much would he keep for himself in a month when he collected \$450 ?

106. ## Economics

The lost interest from the savings she used to start her business. -- is this an implicit or explicit cost? Is this a fixed or variable cost?

107. ## General Physics II

A 8.4 kg object oscillates on a spring with an amplitude of 57.7 cm with a maximum acceleration of 9 m/s2. Find the total energy. Answer in units of J.

108. ## General Physics II

Find the length of the arc on a circle of radius 10 ft intercepted by a central angle 276. Answer in units of ft.

16. Which of the following would be the best revision of these sentences? "Our present receivables are in line with last year's. However, they exceed the budget. The reason they exceed the budget is that our goal for receivable investment was very

This is so confusing :( Given U = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}, A = {12, 14, 16, 18, 20}, and B = {11, 13, 14, 15, 18, 19, 20}. Find A′ ∩ B′. Do not skip to the answer. Show your work, finding A’, then B’ then find their

111. ## I don't understand this....

I do not understand set-builder notation..... Using correct mathematical notation and symbols, express the following in set-builder notation: Z = {16, 17, 18, 19, 20}

112. ## Geometry

U = {0, 1, 2, 3, 4, 5,...}, A = {1, 2, 3, 4,...}, B = {4, 8, 12, 16,...}, and C = {2, 4, 6, 8,...}. Determine the following: A′ ∩ C

113. ## college algebra

6y-7x=12, 7x-6y=-12 solve by graphing method. classify as consistent/inconsistent and dependent/independent. i have been working on this problem and i can't figure it out. please help!

114. ## medical terminilogy

what is the main difference between a stemcell and acancer cell

115. ## Economics

2. Lucy quits a \$50,000 job to open her waffle business. She makes \$225,000 in revenue from her first year of waffle sales. She pulls \$50,000 out of an account that returns 3% interest per year and invests the entire amount in her business. She also

116. ## Advanced Microeconomics College Level

Information on the price elasticity of demand is particularly importatn to managerial decision making because: A) the higher the price elasticity of demand for a product is, the more profitable it will be to produce more of it. B) depending on the

117. ## Basic Algebra

I am having a hard time trying to figure out this problem, if someone could help me...I'd appreciate it: I have to solve the problem 7x-(6x+4)=4

118. ## Basic Algebra

I have to solve the following equation and check my work. Not sure how to do this if someone oculd help me out. The problem is (17b-5)-8(2b+4)=-6

119. ## science

how grams it would take to fill the buret to 35mL? is this would take more or less than for butane? what do you think causes this value to be different from the value for butane?

120. ## bio

would these substances pass easily through the pores of dialysis tubing? and EXPLAIN why. 1-glucose 2-na^+ 3-insulin 4-estrogen 5-hydrogen ion

121. ## Basic algebra

Solve the equation: 3(-2x+1)=-5(x+1)

122. ## physics

A spring-loaded toy gun is used to shoot a ball of mass m straight up in the air. The spring has spring constant k. If the spring is compressed a distance x_0 from its equilibrium position ( y = 0 ) and then released, the ball reaches a maximum height

123. ## physics

A ray of light is incident on a plane mirror at an angle of 40o with the mirror surface. What will be the angle of reflection?

124. ## Basic Algebra

solve the equation & check your solution: 2/5x-9/25x=5

Should American companies refuse to do business in countries? a) That do not practice democracy? b) That routinely practice discrimination? c) That tolerate or even encourage the abuse of children? Explain.

126. ## Chemistry

Calculate the heat energy released when 19.6 of liquid mercury at 25.00 C is converted to solid mercury at its melting point

127. ## Chemistry

A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? Thank you

128. ## Chemistry

A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? Thank you

129. ## Chemistry

A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? Thank you

130. ## psy 202

what is the comparison between positive and negative reinforcement?

131. ## Algebra 1

A theater group made appearances in two countries. The hotel charges before tax in the second country were \$500 lower than in the first. The tax on the hotel bill was 5.5% in the first country and 4.5%in the second. After the trip, the total tax paid on

132. ## math

u=(3,-4) v=(-5,-2) u-v=?

133. ## early childhood

help me with this question organized environments designed to support activities that meet children's educational goals and the facilitation of their interests, curiosity,and participation are key principles of. A. behavior management planning B.

134. ## algebra 2

use analytical and graphical methods to solve the inequality. x©ø+10x©÷+31 ¡ -30 (2x/x+1)¡(4/x-3)

135. ## early childhood

Ms. Harri's new class includes two native American children, about whose families and tribe she needs to gather more information. her use of home and community resource will enhance her: A. personal relationships B. non-English language skills. C.

136. ## Chemistry

How much energy must be absorbed by 20.0 g of water to increase its temperature from 283.0 degrees c to 303.0 degrees c

137. ## math

x/a+y/b+z/c=1, solve for a

138. ## Math

18 people enter a race, if there are no ties, how many ways can 1st, 2nd and 3rd place result?

139. ## Chemistry practice

x+y=9.0 0.50+0.20y=3.90 What is the valuse of x and y?

140. ## Math

How many passwords can be made using 2 letters and 4 digits (this time the letters don’t have to come first) DDDDLL = 6760000 (w repition) 3276000 (w/o repition) **am i working this correctly**

141. ## Physics

Hi, Which correctly expresses the relationship between wavelength (L), speed (V) and perios (T) of a sinusodial wavform ? a) L = T/V b) L= 2fxV/ T c) L= 1 / V x T D) L= V/T e) L = V x T f) L= V x T/ 2f I feel it is option (d) ..please check for me .. and

142. ## math am i right?

Solve (x+18)(x-18)(x+12)>0 Solution set is {x|-8,-12} Is this correct?

144. ## government

judicial review is the power of the american courts to

145. ## principal of management

what you feel are the three most important concept you learned in principal of management

146. ## algebra 2

use analytical and graphical methods to solve the inequality. x^3+10x^2+31¡Ü-30 (2x/x+1)¡Ü(4/x-3)

147. ## Math-geometry

U = {0, 1, 2, 3, 4, 5,...}, A = {1, 2, 3, 4,...}, B = {4, 8, 12, 16,...}, and C = {2, 4, 6, 8,...}. Determine the following: A′ ∩ C