Questions Asked on
November 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.

    asked by K.
  2. adult education

    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.

    asked by rocky
  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.

    asked by N.
  4. chemist ry

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

    asked by barbie
  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

    asked by Jimmy
  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

    asked by William
  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

    asked by adrienne
  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

    asked by Arooj
  9. History

    How did geography affect arab life

    asked by Nick
  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...

    asked by Danny
  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?

    asked by A,
  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?

    asked by Anonymous
  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

    asked by John
  14. Math

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

    asked by Anonymous
  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

    asked by AP
  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

    asked by Desperate Help!
  17. advanced functions

    Prove that cscx / cosx = tanx + cotx

    asked by ariza
  18. Math

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

    asked by Mota
  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.

    asked by Inascent
  20. Calculus

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

    asked by Salman
  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

    asked by Anonymous
  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

    asked by Carla
  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

    asked by Salman
  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

    asked by sophia
  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.)

    asked by Anita
  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

    asked by laura
  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

    asked by Sara
  28. 4th grade science

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

    asked by Damian
  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 ???????

    asked by Salman
  30. adv functions

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

    asked by -
  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

    asked by John
  32. science

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

    asked by Duane
  33. social studies

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

    asked by florida studies weekly
  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?

    asked by Joe
  35. Organic Chemistry

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

    asked by Nicole
  36. Algebra 2

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

    asked by Trisan
  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?

    asked by Salman
  38. college

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

    asked by Anonymous
  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

    asked by brina
  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

    asked by ronnie
  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

    asked by Sara
  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

    asked by Elizabeth
  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

    asked by scooby
  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 =

    asked by Salman
  45. Chemistry (lab)

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

    asked by Anonymous
  46. maths grade 1

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

    asked by dommini
  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

    asked by Jessi
  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

    asked by Nikki
  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

    asked by Hannah
  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

    asked by scooby
  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

    asked by Jessi
  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

    asked by William
  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

    asked by mysterychicken
  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.

    asked by Salman
  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

    asked by Hannah
  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

    asked by Arishdeep
  57. spanish

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

    asked by katie
  58. MATH

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

    asked by Bradley
  59. Math

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

    asked by Anonymous
  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?

    asked by Anonymous
  61. Algebra 2 URGENT PLEASE HELP

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

    asked by Anonymous
  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?

    asked by Barry
  63. science

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

    asked by jolomi skinn
  64. sat

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

    asked by Mercedes
  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.

    asked by shannen
  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: ?

    asked by Anonymous
  67. math

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

    asked by Mota
  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.

    asked by Mota
  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

    asked by Jess
  70. World History

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

    asked by Rebekah
  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?"

    asked by Jena
  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.

    asked by Carla
  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

    asked by Ahmad
  74. economic


    asked by jay
  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.

    asked by Meghan
  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

    asked by garrick
  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.

    asked by melrose
  78. english

    who becomes panchito's friend?

    asked by ashwaq
  79. law ethics in medicine

    when must employee be trained in a hipaa

    asked by dori
  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

    asked by Salman
  81. Math

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

    asked by Anonymous
  82. math

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

    asked by Anonymous
  83. Algebra 2 URGENT

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

    asked by Trisan
  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.

    asked by lauren
  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

    asked by Dan
  86. statistics

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

    asked by k
  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)

    asked by loreta
  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

    asked by Alyssa
  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?

    asked by meshelle
  90. calculus

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

    asked by Jackie
  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.

    asked by Mota
  92. limits

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

    asked by Reen
  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

    asked by Erin
  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

    asked by Amelia
  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

    asked by phil
  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

    asked by Ryder
  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?

    asked by logan
  98. integrated physics and chemistry

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

    asked by logan
  99. Math

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

    asked by Anonymous
  100. college

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

    asked by Luke
  101. Math

    Find each rate 240 pounds of fertilizer __________________ 6 lawns

    asked by Anonymous
  102. science

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

    asked by tommy
  103. Math

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

    asked by JEFF BOMB
  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

    asked by Carla
  105. Algebra

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

    asked by Myra
  106. math


    asked by Nat
  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.

    asked by Anonymous
  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

    asked by Anonymous
  109. Math

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

    asked by Anonymous
  110. science

    what are the four major fields of earth science? please help and thank you

    asked by needhelp
  111. Algebra 2 URGENT PLEASE HELP

    Solve. Square root of 3x+4=x

    asked by Trisan
  112. gr9science

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

    asked by becca
  113. algebra

    Whats 5 10ths of a dollar?

    asked by Alexia
  114. 3rd grade

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

    asked by sheila
  115. Math

    Find each rate 240 pounds of fertilizer __________________ 6 lawns

    asked by Anonymous
  116. math

    what is 15% of 250,000$

    asked by christina
  117. Math

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

    asked by Anonymous
  118. science

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

    asked by logan
  119. Math

    The ratio of 7 times to 3 quarters

    asked by Anonymous
  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.

    asked by Anonymous
  121. algebra two

    square root of 3x+4=x

    asked by Sarah
  122. 6th grade

    name the weakness for article of conferation

    asked by Anonymous
  123. 7th grade

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

    asked by Deion
  124. essay

    what are some good topic to do a personal statment on for an college application?

    asked by kate
  125. maths

    if f(x)=(x^2)(e^x) prove by induction that the nth derivative is (x^2 +2nx +n(n-1)(e^x) thanks

    asked by claire