# Questions Asked onNovember 7, 2009

1. ## Physic

A violin string has a standard length of 32.8 cm. It sounds the musical note A (440Hz) when played without fingering. How far from the end of the string should you place your finger to play the note C (523Hz)? answer should be in cm.

A firm is assigned the network part 128.171. It selects an 10-bit subnet part. a) Draw the bits for the four octets of the IP address of the first host on the first subnet.

3. ## Physics

A Doppler blood flow meter emits ultrasound at a frequency of 5.0 MHz. What is the beat frequency between the emitted waves and the waves reflected from blood cells moving away from the emitter at 0.15m/s? Assume that v_sound=1540m/s in blood.

4. ## chemist ry

if 500 g of KCLO3 decomposes and produces 303 g of KCL, how many grams of O2 are produced?

5. ## Physic

A fan at a rock concert is 30 m from the edge of the stage. The sound intensity level at the edge of the stage is 110 dB. The fan's eardrums have a diameter of 8.4mm. How much energy is transferred to each eardrum in one second? (Hint: It may help to asume

6. ## Chemistry

A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. What element should you look at first in balancing this equation? A. oxygen

7. ## math

At noon, ship A is 40 nautical miles due west of ship B. Ship A is sailing west at 18 knots and ship B is sailing north at 23 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

8. ## Physic

A wave pulse travels along a string at a speed of 160cm/s. Note that part a is independent and refer to changes made to the original string. Part A:What will be the speed if the string's tension is doubled? I was thinking that it should be 320...but i

9. ## History

How did geography affect arab life

10. ## Physic

A 2.2 m-long string is fixed at both ends and tightened until the wave speed is 50 m/s. What is the frequency of the standing wave shown in the figure? Answer in Hz. I've been working on it for a while but cant figure out...

11. ## Physics

A child has an ear canal that is 1.3cm long. At what sound frequencies in the audible range will the child have increased hearing sensitivity?

12. ## physics

A 2.00 kg ball is attached to a ceiling by a 1.40 m long string. The height of the room is 3 m. What is the gravitational potential energy of the ball relative to the ceiling? What is the gravitational potential energy of the ball relative to the floor?

13. ## chemistry

The following redox reaction occurs in basic aqueous solution. When balanced with the smallest whole number coefficients, what is the coefficient for OH-(aq)? Mn(OH)2(s) + MnO4-(aq) = MnO42-(aq). - after doing the question i got 1..but i don't know if im

14. ## Math

Show that sinx = (square root of) 1 - cos^2x is not an identity

15. ## Physics

A whistle you use to call your hunting dog has a frequency of 24 kHz, but your dog is ignoring it. You suspect the whistle may not be working, but you can't hear sounds above 23 kHz. To test it, you ask a friend to blow the whistle, then you hop on your

16. ## physics - HELP ASAP!

A 3.60 kg ball is dropped from the roof of a building 184.8 m high. While the ball is falling to earth, a horizontal wind exerts a constant force of 12.1 N on the ball. (acceleration of gravity = 9.81 m/s^2) How far from the building does the ball hit the

Prove that cscx / cosx = tanx + cotx

18. ## Math

Draw a diagram to represent the identity (a + b)2 = a2 + 2ab + b2.

19. ## Physics

Pleae help! A uniform 2m long plank is supported at each end by ropes. The plank has a mass of 300grams and a 1 kg weight is attached 0.5m from one end. Find the tension in each supporting rope.

20. ## Calculus

The linear approximation at x = 0 to sin (5 x) is A + B x. Find A and B?

21. ## Math

1.If a person jogs at a rate of 5 1/2mi/h for 3 1/2 h in a week, how many calories do they burn? 2. If a person runs in place for 15 minutes, how many calories will be burned? 3. If a person cross-country skis for35minutes, how many calories will be

22. ## History

Can you please explain to me what this means. This is what I think that it means. Jackson did not agree with states having any right to nullify a federal law. An ordiance was passed by the people of South Carolina because they felt that the Tariffs of 1828

23. ## Calculus

Use linear approximation to estimate the amount of paint in cubic centimeters needed to apply a coat of paint cm thick to a hemispherical dome with a diameter of meters

24. ## math

The value of a car decreases at a constant rate as it grows older. When the car is 2 years old, it is worth \$23,000. When the car is 5 years old it is worth \$15,500. Write and equation relating y (value of the car \$) to x (age of car). Is it

25. ## math

Mr. hernandez had to interview a total of 63 households in his assignment. H has already finished 28. what percentage of the households in his assignments has he finished? (round your answer to the nearest tenth of a percent.)

26. ## United States government

If the issue is whether a person's civil rights were violated in a court decision,through what levels of courts might that person appeal

27. ## To Ms. Sue

Ms. Sue you said that I answered this adequately. I want to add more, it doesn't look complete, I will really appreciate it, if you could help me out a little,thanks. Before the uprising in Haiti, would Europeans have believed that a slave revolt on this

What kind of heat transfer cause Earth's najor wind pattern?

29. ## Math

Use linear approximation, i.e. the tangent line, to approximate 1.6^3 as follows: Let f(x) = x ^3. The equation of the tangent line to f(x) at x = 2 can be written as y=12x-16 Using this, we find our approximation for 1.6 ^3 is ???????

Show that tanx= (sinx/ cosx) can be written as: tan(x-y) = (tanx - tany) / (1+ tanxtany)

31. ## chemistry

The redox reaction below occurs in acidic solution. Balance it with the smallest whole number coefficients and determine the coefficient for H+. MnO4-(aq) + HNO2(aq) ---> Mn2+(aq) + NO3-(aq) when i did it..i got the answer as1...but im not to sure..help?

32. ## science

If a cube of Jello is cut into two pieces, what property of the pieces did not change?

33. ## social studies

what impact did the French and Indian War have on Forida?

34. ## algebra

A wholesaler mixed coffee beans worth \$6/kg with another kind worth \$8.80/kg. The 16kg mixture was worth \$6.70/kg. How many kilograms of each type was used?

35. ## Organic Chemistry

How is the rate of adjusted when using a sand bath as a heat source?

36. ## Algebra 2

solve. If the equation has no real solutions, say so. Square root of 3x+4= x

37. ## Math

A fence 4 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

38. ## college

how can you differentiate between oxalic acid, citric acid and tartaric acid with CaCl2 test? show the chemical reaction?

39. ## math213

Wally kept track of last week’s money transactions. His salary was \$150 plus \$54 in overtime and \$260 in tips. His transportation expenses were \$22, his food expenses were \$60, his laundry costs were \$15, his entertainment expenditures were \$58, and his

40. ## statistics

A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the

41. ## Socials-Ms. Sue

What was the purpose of the continental system? Did it succeed or fail? Imagine that you are a senior advisor to Napoleon. You have been asked to prepare a memo outlining the advantages and disadvantages of disrupting Britain's trade with Europe. Your memo

42. ## Math (calc)

Given the function: f(x)=x^3(x-2)^2 , on the interval [-1,3] find the domain and Asymptotes ...Isn't the domain (-1

43. ## human resource managment

4. Script for orienting new employees o You may use the following opening sentence to start your script: “We, in HR, feel that it is important to address some sensitive issues during your early employment with our company.” o Create a script that can

44. ## Calculus

Determine where the absolute extrema of f(x)=-3(x^2)+7x on the interval [1,3] occur. 1. The absolute maximum occurs at = 2. The absolute minimum occurs at =

45. ## Chemistry (lab)

What are the units of retention time in gas liquid chromatography? Minutes or seconds?

Tom has half as many pennies as Sue. Sue has 20 pennies. How many pennies does Tom have ?

47. ## Cost Accounting

Katherine Company's Sales Budget Has The Following Unit Sales Projection For Each Quarter Of The Calendar Year 2009. January -March 540,000 April-June 680,000 July-September 490,000 October-December 550,000 Total 2,260,000 Sales for the first quarter of

48. ## Chemistry

I need some help with net ionic equations. I can do single replacement, double replacement, etc., but I don't get stuff like gas forming-reactions or the trends when stuff like a strong acid and water are the reactants. Examples: 1. Moist sodium hydroxide

49. ## Physics

Hi, I had some questions about Physics and Newton’s Three Laws of Motion and was wondering if someone could possibly help me. I wasn't sure if my answers were correct and I need to make sure they are. #1 Write out in words what “acceleration ~ net

50. ## human rescource management (am i correct)

For your final project, you will develop documentation for human resources professionals to manage a specific employment position. The materials you create would assist HR professionals in the four functions of job analysis, selection, orientation, and

51. ## physics

A particle is released on the smooth inside wall of a cylindrical tank at A with a velocity v which makes an angle beta with the horizontal tangent. When the particle reaches a point B a distance h below A, determine the expression for the angle theta made

52. ## Chemistry

Which of the following elements does not form bonds easily because it has a full outer shell? A. Aluminum B. Carbon C. Helium D. Calcium

53. ## Literature

I had to write an essay analyzing a short story. I chose The Birds by Daphne du Maurier and this is what I got: Daphne du Maurier’s short story The Birds is a story of an old war veteran, his family, and how they battle fierce birds. It starts out on the

54. ## Calculus

The circumference of a sphere was measured to be 74.000 cm with a possible error of 0.50000 cm. Use linear approximation to estimate the maximum error in the calculated surface area? Also Estimate the relative error in the calculated surface area.

55. ## Physics

Hi, I had some questions about Physics and Newton’s Three Laws of Motion and was wondering if someone could possibly help me. Some of the questions I wasn’t sure about the answers. #1 Write out in words what “acceleration ~ net force” means. My

56. ## English

i need poetic terms for the song thriller by Michael Jackson? It's close to midnight and something evil's lurking in the dark Under the moonlight, you see a sight that almost stops your heart You try to scream but terror takes the sound before you make it

57. ## spanish

how do u anwser this question in spanish ¿Qué haces los sábados?

58. ## MATH

Rename each fraction as a mixed number. 17/4.

59. ## Math

Write each of the following ratios in simplest form. The ratio of 5 3/5 to 2 1/10

60. ## Math

Business and finance. A store has T-shirts on sale at 2 for \$5.50. At this rate, what do five T-shirts cost?

Solve. If the equation has no real solution, say so. Square root 3x+4 =x

62. ## Physics121

What are the three longest wavelengths for standing sound waves in a 124-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other?

63. ## science

please list out 6 functions of the blood and please write the reference of it

64. ## sat

if i don't finish my essay, how many scores will i get?

65. ## Psy

In three-to five-paragraphs, describe a time when you tried to learn a good habit or to unlearn a bad one. Whether or not you are still working on making this change, describe the patience it takes to stick to your goals and make a change for the better.

66. ## Geometry HELPP

I need a conclusion and reason for the following statements. 1. Angle C is supplementary to angle R Angle D is supplementary to angle R Conclusion: ? Reason: ? 2. XY - 9 = ST - 9 Conclusion: ? Reason: ? 3. Ray CD bisects angle BCR Conclusion: ? Reason: ?

67. ## math

Rationalise the expression 1/(ã2 + ã3).

68. ## Math

Use Pascal’s triangle to read off the coefficients of the powers of x in the expansion of (1 + x)n for different values of the positive integer n. Check the results for n = 3 by expanding (1 + x)3.

69. ## English

R for run on sentence, CS for comma splice, F for fragment, and C for correct sentence. Some correct sentences can be punctuated more effectively, however. 1. Carlos took the job and he was happy to get it. 2. Tono loves Chinese food, he eats it three

70. ## World History

Is the story of how the Trojan war started with Helen, and Paris in the Iliad? Thanks:)

71. ## College Chemistry

Are my calculations correct of i came up with 50.71g of CaH2 to the question, "How many grams of are needed to generate 54.5 of gas if the pressure of is 815 at 22?"

72. ## History

After the election of 1828 why did people consider andrew jackon "the rise of the common man"? I have searched put I cant find anything that says why he was known as the common man.

73. ## Art

i need to choose a paint where design element and visual element in 1 paint could you help me to choose that paint and telling me what elements in it thank you

74. ## economic

I HAVE AN ASSIGNMENT WHERE I HAVE TO PLOT POINTS ON A GRAPH IN EXCEL, THE INFORMATION GIVEN IS QS=2P-20 AND QD=80-2P AND I WAS TOLD TO USE PRICES 10,20,30,40,50 AND QUANTITIES 5,10,15,20,25,30,35,40 FOR THE GRAPH. I HAVE NO CLUE WHAT TO DO FOR THE CHART IN

75. ## English

I have a question. When your using a quote is it if it's 5 or more lines its indented in 5 spaces and if it's 4 or less lines it goes into your paragraph. How does that go again.

76. ## homework

Airline work: Topic: Philippines 1. Does Philippine Airlines check your ticket before take off or when your in the sky? (there is a posiblitiy that they could do both or none at all) 2.Did Philippine Airlines change there seat and improve there seats to

77. ## math

Suppose a license plate contains four digits.The probability of a license plate having an even or odd digit is the same.What is the probabilty of having a license plate with all even digits.

78. ## english

who becomes panchito's friend?

79. ## law ethics in medicine

when must employee be trained in a hipaa

80. ## Math

Consider the function f(x) = 7 x + 3 {x ^ -1 }. For this function there are four important intervals: (-infinity, A], [A,B),(B,C), and [C,infinity) where A, B and C are either critical numbers or points at which f(x) is undefined. Find A, B and C

81. ## Math

Determine whether each pair of fractions is proportional. 5 75 _ ? __ = 8 120

82. ## math

12 gallons of paint 9 gallons of paint _______________ =_____________ 8,329 ft2 1,240 ft2

83. ## Algebra 2 URGENT

Solve. Square root of 3x+4=x BobPursely can you please show me the work

84. ## writing ASAP-.

i'm work on a book project on ameila earhart.The queston on my book report is ...How is the provied by the author imporant or relatable to today's modern society ?Please tell what this means and give an example.

85. ## Chemistry

Could some please tell me if I did these problems correctly? (I know that I did not Cancel common aqueous ions yet) Question: Write the net ionic equation for the following 1)Mixing solution of barium acetate and sodium phosphate 2)Mixing solution of

86. ## statistics

a mathematically defined curve that is the comparison distribution used n ANOVA is called the?

87. ## psychology

hi, i need help please can you help me Asahe oves quickly around the restaurant where she works as a waitress, Alicia fnds herself humming in her head the phrase,"Just whistle while you work!" this is an example of a/an A) proposition b) prototype C)

88. ## Vocab.

Okay, so I have to unscrammble these letters to get the final message: w u n o r e v o o s t s r b i o i a e u c o u s h r c r d e d _ _ _'_ _ J_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 20 W_ _ _ _! I'm pretty sure the first two words are

89. ## 330 mgt

Applying information regarding the personality traits, what are the personal characteristics that you believe would contribute to the success of entrepreneurs/intrapreneurs?

90. ## calculus

find dy/dx of y^3-xy=-1

91. ## math

Melons cost QR1.5 each and apples cost QR3.75 per kilogram. A man buys apples and melons at the supermarket. Write a formula to describe the total cost of his purchase. Investigate how many melons and how many kilograms of apples he could buy for QR30.

92. ## limits

lim as x-> infinity sec^2(1/x)

93. ## Algebra

17-Identify the vertex, axis of symmetry and x-intercept(s) of F(x)=(x+5)^2-6. I have no idea how the x intercepts are -5 +/- sq. root 6 and 0. can you show me how this came to be? I factored it so it would be x^2+10x+19, but there's no common factors in

94. ## maths

differentiate using product, chain and quotient rule ln x / 5x-7 and e^x / 2x^3 - 1 could you help me out with the first and just point me in the right direction for the first i cant seem to get the steps in the right order and then it gets all muddled

95. ## french

we have been given a text and have to find words in it. we have to find the word bothers/upsets all i know is that it begins wit 'in' could it be indispose as it is the only word beginning with it we also have to find (here)encounter an it begins with

96. ## religious education

please could someone help me find a websie about a man called billy mccurrie. i need to answer 2 questions about him:- what events made him not believe in God and what events made him believe in God. thankyou for your time to help me

97. ## integrated physics and chemistry

classes of steel and iron are defined by the amount of WHAT? and other elements present in the alloy. is it zinc,tin,carbon,or aluminum?

98. ## integrated physics and chemistry

what is the main ingredient in 22-karet gold? is it copper,tin,gold,or steel?

99. ## Math

Which is the better buy: 5 lb of sugar for \$4.75 or 20 lb of sugar for \$19.92?

100. ## college

Why is it not possible to formulate a model that accurately represents reality

101. ## Math

Find each rate 240 pounds of fertilizer __________________ 6 lawns

102. ## science

Name three freshwater resources and 3 ocean water resources and their descriptions

103. ## Math

x'2+ 10= 3x+17. Use the quadratic formula to solve.

104. ## History

Can you please explain to me what Worcester v. Georgia was. I have searched this and read many articles. But I'm really confused and don't understand it. Your help would be appreciated. Thank you

105. ## Algebra

0.3x-0.2y=4,0.5x+0.5y=-15/9 solve

y=(x+3)(x-1)

107. ## Math

Crafts. Marc took 3 hours (h) to mow a lawn while Angelina took 150 minutes (min) to mow the same lawn a week earlier. Write the ratio of Marc’s time to Angelina’s time as a ratio of whole numbers.

108. ## Marth

Write the proportion that is equivalent to the given statement. If Maria hit 8 home runs in 15 softball games, then she should hit 24 home runs in 45 games

109. ## Math

12 gallons of paint 9 gallons of paint _______________ =_____________ 8,329 ft2 1,2402 ft2

110. ## science

Solve. Square root of 3x+4=x

112. ## gr9science

how do u convert g/ml to Kg/m^3 ?

113. ## algebra

Whats 5 10ths of a dollar?

shelby had \$18.50. She spent \$7.25 at the car wash. Write an expression that shows how much she spent.

115. ## Math

Find each rate 240 pounds of fertilizer __________________ 6 lawns

116. ## math

what is 15% of 250,000\$

117. ## Math

3xsquared-9x-11 How to map unto a graph

118. ## science

how does adding copper to gold change the economic value of the gold and the properties of the gold?

119. ## Math

The ratio of 7 times to 3 quarters

120. ## math

Crafts. Marc took 3 hours (h) to mow a lawn while Angelina took 150 minutes (min) to mow the same lawn a week earlier. Write the ratio of Marc’s time to Angelina’s time as a ratio of whole numbers.

121. ## algebra two

square root of 3x+4=x

name the weakness for article of conferation

I need to write a paper entitled Heritage Research Project, but I am not quite sure how to do this.