Questions Asked on
April 30, 2011

  1. physics

    If an observer is traveling parallel to a rod at twice the speed of the rod, what is does the observer perceive the length to be? Choose one answer. a. The length of the rod remains the same. b. The length of the rod will become twice its original value.

    asked by ashley --
  2. physics

    The period of a simple pendulum is measured to be 4.0 seconds in a frame of reference. Which of the following is correct when the period of the pendulum is measured by an observer moving with 0.4 times the speed of the light? Choose one answer. a. The time

    asked by ashley --
  3. physics

    Marks: 2 The time taken by the space craft moving at a speed equal to half the velocity of light to go from star A to star B is 2 years as calculated at the Earth station. Which of the following is correct for the time measured by the astronaut in the

    asked by ashley --
  4. physics

    Marks: 2 The time taken by the space craft moving at a speed equal to half the velocity of light to go from star A to star B is 2 years as calculated at the Earth station. Which of the following is correct for the time measured by the astronaut in the

    asked by ashley --
  5. physics

    An observer measures the length of an object. In which of the following cases is the measured length at a minimum? Choose one answer. a. The observer and the object move with the same speed v in the same direction. b. The observer and the object move with

    asked by ashley --
  6. math

    Can you tell me if I have the correct answer to this problem. A formula to determine the area of a person’s skin in square inches is s=15.7w^0.425 h^0.725 where w is weight in pounds and h is height in inches. Use S to estimate the area of a person’s

    asked by patiance
  7. Physics Urgent!!!!!

    Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in

    asked by Abi
  8. math

    if john mowes his lawn in 2 1/2 hours how much of the lawn does he mow in 1 hour?

    asked by lisa
  9. Physics (please help)

    A planet is in circular orbit about a remote star, far from any other object in the universe. Which of the following statements is true? a. None of the other statements are true. b. There is only one force acting on the planet. c. There are two forces

    asked by Catherine
  10. calculus

    Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.

    asked by Todd
  11. calculus

    Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.

    asked by Todd
  12. Calc 2

    Consider the line passing through the points (2, 1) and (-2, 3). Find the parametric equation for y if x = t + 1.

    asked by Vance
  13. Calc 2

    Find the second derivative (d2y/dx2) for the curve given by x = 2·cos() and y = sin()

    asked by Vance
  14. Calc 2

    Find the corresponding rectangular coordinates for the polar point (4, -/6).

    asked by Vance
  15. statistics

    an employee earning $10.85 per hour has been awarded a 3.5 percent increase. What is the hourly salary

    asked by Anonymous
  16. Math

    Mary B deposits $8500 into a savings account, compounded monthly at a nominal interest rate of 9 percent, as part of a savings plan that she would like to undertake in 5 years. 1) What is the effective interest rate per annum? 2) How much money would she

    asked by Randi
  17. spanish-college essay!

    Se puede revisar mi ensayo por favor? Es un ensayo de colegio. Gracias! Cuando la mayoría de la gente oye la palabra “El machismo” se la asocia con el sexismo. Se piensa que las mujeres y hombres son desiguales. Se pregunta: ¿por qué las mujeres

    asked by Talia
  18. Maths

    Peter invests $12500 for 5 years at 12 percent per annum,compounded monthly foe the first two years, and 14 percent per annum compounded simiannually for the next three years. How much will Peter receive after five years?

    asked by Randi
  19. Math

    Dominic was 8 years old when his sister was born. Now the sum of their ages i 56. How old is Dominic now?

    asked by HELP!!!
  20. Mathematics

    What are consecutive numbers? -The sum of TWO consecutive whole numbers is 99. What are they? -The sum of THREE consecutive whole numbers is 99. What are they? Can someone please show me if there is working out? (if needed)

    asked by Crissy XD
  21. math

    4,35,60,440 expand in words

    asked by padma
  22. English

    I still have the following doubts. I included the various alternatives. Thank you 1) Prospero calls Caliban a lying slave instead Miranda calls him a horrible slave. Is "instead" correct? I would have used "while, whereas" or I would have started a new

    asked by Henry 1
  23. CHEM (HELP PLS)

    Suggest the syntheses of putrescine and cadaverine from ethyl bromide I don't think I can use Grignard can I? PLEASE HELP. CH3CH2Br + CH3CH2Mg/EtoEt -> CH3Ch2Ch2Ch2MgBr + NaN3/EtOH -> CH3Ch2Ch2Ch2N=N=N + LiAlH4/H20 CH3Ch2Ch2Ch2NH2? Then what? does this

    asked by lauder
  24. CHEM (HELP PLS)

    Suggest the syntheses of cadaverine (pentane-1,5-diamine) from 1,5-Dibromopentane

    asked by lauder
  25. English

    i forgot to include the following sentences. Thank you. 1) You keep mispelling the word "together". Rewrite it correctly at least 10 times. 2) Particular attention was paid to the setting (was given is a mistake?) 3) The novels are preceded by a preface,

    asked by Henry 1
  26. English

    The problem is I don't know how to answer this question. Many writers create characters who are blissfully unaware of how they are perceived by others. One of the most complex examples of this is Chaucer's Pardoner. In one character we see a complex mix of

    asked by Chrystal-Jhean
  27. Maths

    From this past 4 results 17-90-48-84-41. 46-6-15-64-85. 78-41-65-50-54. 52-70-30-42-29. Can anyone predict the next 5/90 lotto winning numbers please

    asked by Steve
  28. chemistry

    describe how you can crystallize potassium nitrate from its aqueous solution

    asked by ziki
  29. probability

    Ryan spent a dollar on a Tri-State Megabucks ticket, enticed by a big jackpot. Ryan chose six different numbers from 1 to 40, inclusive, hoping that hey would be the same numbers draw later by lottery officials. Sad to say, none of Ryan's choices were

    asked by jane
  30. maths

    cos(a+b)=m(cos(a-b) then tan a=?

    asked by pooja
  31. islam

    a.What does “seven earths” as implied in verse 12 surah at-Talaq actually mean? b.Why does the Quran use only a singular noun(al-ardhu) when describing the earth(or seven earths) in this case whereas when describing seven heavens a plural noun

    asked by fidah
  32. English

    1. He made them be quiet in the library. 2. He made them quiet in the library. 3. He had them be quiet in the library. 4. He had them quiet in the library. 5. He watched them be quiet in the library. 6. He watched them quiet in the library. (Which ones are

    asked by rfvv
  33. Math

    Could someone answer this question so I understand it. Thanks Find the supply function: p = S(x)=5(e^0.02x - 1) Find the average price (in dollars)over the supply interval [31,36]. Round to decimal places as needed. The average price in dollars is ?

    asked by Jules
  34. English

    1. I would prefer not to eat that. 2. He slaved at his job so his family would have everything they needed. 3. Your cholesterol balance is good. 4. He slipped into the room. 5. Clip two sheets of paper together. 6. The whole universe knows it. 7. I won't

    asked by rfvv
  35. Chemistry

    Suppose a compound could point in any of two directions in the solid and still have the same energy. How many molecules would there be if the total entropy of a solid sample of this compound was 8.174e-9J/K I used S= klnW and got lnW = 5.92e14. How do i

    asked by Jude
  36. College math

    Highwq curves. If a circular curve without any banking has a radius of R feet, the speed limit L in miles per hour is L = 1.5 aqrt(R) (a) Find the speed limit for a curve having a radius of 400 feet. (b). If the radius of a curve doubles, what happens to

    asked by Shin
  37. com156

    courses per year the total comes to $8,760. With this information financial aid does not begin to cover my tuition for a year. The only other option I have is to apply for a student loan, scholarship, or a credit card. There’s a downside to using a

    asked by kim
  38. physics

    If an observer is traveling parallel to a rod at twice the speed of the rod, what is does the observer perceive the length to be? Choose one answer. a. The length of the rod remains the same. b. The length of the rod will become twice its original value.

    asked by ashley --
  39. physics

    The period of a simple pendulum is measured to be 4.0 seconds in a frame of reference. Which of the following is correct when the period of the pendulum is measured by an observer moving with 0.4 times the speed of the light? Choose one answer. a. The time

    asked by ashley --
  40. Chemistry

    The free energy change for the dissolution of cuco3 at 25celsius is 56.246KJ/mol. What is the solubility of this compound. I used delta G/-RT = lnKsp but the answer i got was wrong.

    asked by Jude
  41. math

    2 questions please 6x

    asked by wayne
  42. algelbra 2

    I have a 3.50 but have 7 disks problem and can't think straight, my last class before i graduate. I need answers to Math 117 week six quiz? Can u Help, just put $ in pay PaL.

    asked by Deb
  43. Life orientation (research)

    Research one factor that causes ill health , accidents , crises or disasters: 1) alcoholism

    asked by Bheki
  44. Math(Please help)

    1) h(t)=20(5/8) - 16(5/8)^2 + 10 = 65/4 All I need to know for this is how to calculate the fraction parts to get 65/4. I am not good with fractions. 2) A manufacturer's profit from producing x units of a product is given by P(x)=0.002x^3 - 0.01x^2 + 0.5x.

    asked by Hannah
  45. art

    Titles of works and company names should be treated as singular nouns. For example: “The Secret Life of Bees is a novel that was made into a movie last year.” true or false

    asked by Anonymous
  46. AP Chemistry

    So... this is the question which is from AP chem 2006 past paper. Suppose that a stable element with atomic number 119, symbol Q, has been discovered. a) write down the ground-state electron configuration of Q, showing only the valence-shell electrons.

    asked by --
  47. English

    Can you please check if the two answers to the questions (3/4) are correct? It's really urgent. Thank you. 1)Jamal is planning a trip around the world on his motorbike with his friend Simon. 2)They are going to leave from London next week. Then they will

    asked by Henry1
  48. world history

    is pennsylvania's government a monotheistic or not?

    asked by Seth
  49. Calc

    Consider the line passing through the points (2, 1) and (-2, 3). Find the parametric equation for y if x = t + 1.

    asked by Alex
  50. physics

    These are problems I have been stuck on and can't figure out. Help would be greatly appreciated. 1. Blue and yellow light combinte to produce white light because ______ (Please explain what it's the correct answer) a.they absorb each other's wavelengths b.

    asked by Josh
  51. Math(Please help)

    1) where is the function f(x)= 5 / (2x-4)^3 increasing. I know the answer is for all of x but I do not know how to get this. I know that you can write the equation as 5(2x-4)^-3 2) Let a, b, and c be fixed with a>0 and let f(x)=ax^2 + bx + c. Which of the

    asked by Hannah
  52. calc

    Find the corresponding rectangular coordinates for the polar point (4, -/6).

    asked by Alex
  53. chemistry

    What mass of the following would be needed to make 50 ml of 0.100 M solution? (i) KOH (ii) Na2CO3 (iii) NaHCO3 (iv) Na2CO3•10H2O (v) Ba(OH)2 (vi) KMnO4

    asked by Anonymous
  54. English

    In my previous post I didn't include the USA when mentioning the countries they are travelling through. Shall I include it? Can you please check again? Thank you. 1) Which countries are they travelling through? They are travelling through Ukraine,

    asked by Henry1
  55. calc

    Let f(3) = 0, f '(3) = 6, g(3) = 1, and g '(3) = 1/3. If h(x) = f(x)*g(x), find h '(3).

    asked by Todd
  56. math

    how do i find the cubed root of anumber

    asked by steve
  57. math

    is it possible for two rays to be parsllel to each other is it possible for two rays to be parallel to each other

    asked by esha
  58. Etymology

    So I posted like 3-4 weeks ago that I was doing a project about fascinating etymology stories and I got a few great websites:) I only could find a few really funny and interesting stories that my classmates would actually enjoy/ want to listen to. I have

    asked by Rebekah
  59. science

    what is the state of matter in which particles have lowest energy

    asked by loser
  60. math

    Interest= 472.50 principal= 750 rate=7% time=???

    asked by sasha
  61. science

    the ______ value indicates the amount of resistance in 1cm of insulation

    asked by loserisuck
  62. English

    I forgot to include the following sentences. They are really urgent. 1)He hadn't read a book since he was a boy/ "by the time he was a boy he hadn't read a book (is a mistake?) 2) She told me she had dumped him/broken/finished with him. (are they all

    asked by Henry1
  63. math

    If $3000 is deposited at the end of each half year in an account that earns 6.2% compounded semiannually, how long will it be before the account contains

    asked by yeah
  64. math

    If $3000 is deposited at the end of each half year in an account that earns 6.2% compounded semiannually, how long will it be before the account contains $130,000?

    asked by yeah
  65. Algebraic Expressions

    2 / (x-1)^3 + 3 / (x-1)^2 + 4 / x-1 Two of us get 4x^2 - 5x + 3 / (x-1)^3 The book gives 4x^2 - 5x + 3 / (x-1)^3 Can anyone help with this one.

    asked by tish
  66. Chemistry

    So I am writing a lab report and Im stuck with calculating the enthalpy change of combustion of the following reaction: Mg+2HCl--> MgCl2+H2 .I am given the mass of Mg which is 5g and the concentration of HCl which is 2M and the volume of HCl which is 50

    asked by Ashley
  67. science

    A stretched string has a third harmonic frequency of 600 Hz. What is the frequency of the second harmonic?

    asked by Anonymous
  68. science

    What travels the slowest? Sound waves in water, steel, air, helium or visible rediation?

    asked by Anonymous
  69. science

    One person talking softly in a room is about 60dB. If 100 people in the room are all talking at the same level the intensity is now?

    asked by Anonymous
  70. science

    The major difference between transverse and longitudinal waves is the?

    asked by Anonymous
  71. science

    An object is 15 cm from a converging lens forms a real image 15 cm from the lens. The magnification is?

    asked by Anonymous
  72. science

    A sound produces an intensity of 1 W/m2 at a distance of 10 m from a source. What would be the intensity at a distance of 5 m from the source?

    asked by Anonymous
  73. science

    Which of the following travels the fastest? sound waves in air, sonar, microwave radiation, waves produced by a sonic boom, Ultrasonic waves?

    asked by Anonymous
  74. science

    The intensity of a 50-dB sound is reduced by one-half. What is the new intensity of the sound in dB?

    asked by Anonymous
  75. science

    Unpolarized light is shown through two polarizing filters that are at 90 degrees. What fraction of light will pass through both filters?

    asked by Anonymous
  76. science

    Polarized sunglasses operate on the principal that?

    asked by Anonymous
  77. science

    Transverse waves can propagate through which of the following? solids, liquids, gasses, or what combination of these?

    asked by Anonymous
  78. physics

    What is the critical angle of light traveling from benzene (n=1.501) into air? Choose one answer. a. 40.05o b. 48.22o c. 41.78o d. 62.63o

    asked by ashley --
  79. science

    Three different resistors: 10 ohm, 20 ohm, and 20 ohm are connected in series, the overall resistance is:

    asked by Anonymous
  80. science

    Three different resistors: 10 ohm, 20 ohm, and 20 ohm are connected in parallel, the overall resistance is:

    asked by Anonymous
  81. Calc

    dy/dx of xy^2=tan(2x+4y)

    asked by ardi
  82. science

    Which one would be the safest? a. a current of 0.001 amps at 120 volts b. a current of 0.0001 amps at 24,000 volts c.a 5 volt source with unlimited current potential

    asked by Anonymous
  83. Business Statistics

    A company employs 10 people and plans to select a group of 4 of these employees to receive advanced training. How many ways can the group of four employees be selected? I thought this would be rather simple and I am completely stuck.. Any help with a

    asked by Shelley
  84. algebra 2

    what is the rule for the geometric sequence: 5000, 500, 50, 5?

    asked by sky
  85. pre school

    The comparison to children with adhd-hi, children with the subtype adhd-pi are greater risk for? A.ANTISOCIAL BEHAVIOR B.REJECTION FROM OTHERS C.ANXIETY AND MOOD DISORDERS D. PLACEMENT IN SPECIAL EDUCATION CLASS *I THOUGHT C BUT WASN'T SURE

    asked by mallory
  86. Algebra

    Find a power function of the form y=ax^b whose graph passes throught the points (2, 5) and (8, 12). How do i solve this??

    asked by Brittney
  87. Algebra

    Solve the equation and check for extraneous solutions. 10^((x^2)+1)=100,000 How do i handle this when the exponents have exponents?

    asked by Brittney
  88. Spanish

    How do you say "make a mess" in spanish?

    asked by Delaney
  89. Chemistry

    What is the total energy transfer(in KJ) when 10.00 pounds of water vapor at 110 degrees C becomes ice at 253K? Assume that the specific gravity of water = 1.00. The answer I got was around 12,000 KJ. Is this correct?

    asked by Tyler
  90. Math

    Consider the line passing through the points (2, 1) and (-2, 3). Find the parametric equation for y if x = t + 1.

    asked by Missy
  91. Chemistry

    How many grams of Li2SO4 are needed to prepare 250.0 mL of a 4.0% m/v Li2SO4 solution?

    asked by Debbie
  92. Algebra

    Expand the expression of log5x^(1/3)y^6 5 is the base of the log. this is pretty tricky stuff and im not sure how to attempt it..

    asked by Brittney
  93. Physics Urgent!!

    Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in

    asked by Abi
  94. english- news report

    Pls i need help with this newsreport. can you pls tell me if it sounds like it or not and you can also advice me on somethings to make it good. Headline: The death of King Duncan. Byline: Victoria Sinec. Lead paragraph: Duncan, the King of Scotland killed

    asked by ted
  95. Algebra

    ok did i do this right? evaluate the expression log(base4)(16)(4) log(4) 16 + log(4) 4 ? can you do that?

    asked by Brittney
  96. Math(Please help)

    Logarithmic differentiation f(x)=(2x-1)^-2 (x+3)^4 at x=1 f'(x)= -2*2/2x+1 + 4*1/x+3 [(2x-1)^-2)(x+3)^4 and then I plug in 1. I am having trouble getting an answer when I plug in 1.

    asked by Hannah
  97. Advanced Algebra

    Solve the equation 4e^x -2=14 I got it this far... 4e^x=16 But now what?

    asked by Kenya
  98. physics

    A 0.50 kilogram ball is thrown vertically upward with an initial kinetic energy of 25 joules. Approximately how high will the ball rise ?

    asked by lucy
  99. Quotes about English language origin

    So I wanted to start my etymology paper about fascinating word origins with a quote as my attention grabber. I am looking for a quote that talks about the english language and the origin of most of its words. Some interesting quote. I don't even know if

    asked by Rebekah
  100. math

    The perimeter of a rectangle is 194 inches. the length exceeds the width by 31 inches. find the L&W

    asked by Renee
  101. science

    Which of the following compounds has more than one some; PtCl_5NH_3, Co(BH_3)_4Cl_2, Pt(Co)_2Cl_2, Rb_3[Cr(CN)_6]

    asked by kyle
  102. 6th grade english

    Please tell me if I have identified the following the sentences correctly as being declarative, exclamatory or impeative: The Italian word fo "moon" is luna Declarative Wow, that's how you say it it Spanish, too Exclamatory I have heard the words lunatic

    asked by Linda
  103. chid psychology

    which of the following is not true of the meta-analytical finding of reseach theory with children? A. changes achieved by children reciving treatment are greater than those for children not receiving treatment b. treatment effects are larger for problems

    asked by alicia
  104. Geology 245

    I am in need of help with my final project in Geology. I have to create a 12-15slide powerpoint presentation on Factors and Forces of Geological Features, The Barnett Shale. I have the final rubric Final Rubric: |Factors and Forces of Geological Features

    asked by Joe
  105. probability

    you have 16 coins that are heads up and 18 coins that are tails up. After you add some coins that are tail up the ratio of heads up to tails up is 1:1.5. How many are tails up?

    asked by Crystal
  106. Philosophy

    The very large increase in allergies over the last thirty years is due to the great success of immunizations administered over this time period. Since immunizations have nearly eliminated life-threatening diseases such as polio, the human immune system

    asked by Jean
  107. 6th grade english

    How would I change the following sentences to exclamatory? The moon travels at more than 2,300 miles per hour Some people thought the moon was made out of green cheese

    asked by Linda
  108. Chemistry 20

    The mass of calcium hydrogen carbonate that would be found in 52.0L of hard water in a bathtub is _______________ g. The amount concentration of calcium hydrogen carbonate in the hard water is __________mmol/L

    asked by Cheryl
  109. Chemistry

    Dilute H3PO4(aq) and NaOH(aq) are mixed in chemically equivalent quantities. Write the formula equation for the reaction

    asked by Donna
  110. eth/125

    Write a 1,050- to 1,400-word research paper in which you identify the linguistic, political, social, economic, religious, and familial conventions or statuses of four Hispanic groups living in the United States. Your paper must address Mexican Americans,

    asked by meka
  111. Math(Please help)

    Find: the integral (x^2/4 - 4) dx I know that the answer is x^3/12 -4 +c but I do not know how to get this

    asked by Hannah
  112. Chemistry 20

    Sorry, the 1st part to those 2 questions are: Hard water contains metal ions, most commonly calcium and magnesium ions. Some moderately hard water is found to contain 200ppm of calcium hydrogen carbonate.

    asked by Cheryl
  113. geology 245

    Power point on factors and forces of geological features for the Barnett Shale

    asked by Joe
  114. Math(Please help)

    Determine the integral by making an appropriate substitution integral of 8x cuberoot srqt(4x^2-9) dx let u= 4x^2-9 du= 8x dx I do not know what to do now

    asked by Hannah
  115. Math(Please check)

    evaluate the integral integral of 3 to 2 x/(x^2-2)^2 dx u=x^2-2 du=2x dx 1/2 du = x dx integral of 1/u^2 du -1/(x^2-2) Then I plug in 3 and 2 and subtract them form each other -1/(3^2-2) - (-1/(2^2-2) Is this correct?

    asked by Hannah
  116. History

    What were the economic and social differences between the North and the South around the 1830s? What types of classes lived there, and what kinds of labor and stuff did they do?

    asked by Bobby
  117. math need help

    Find the future value of an annuity due of $100 each quarter for 2½ years at 11%, compounded quarterly.

    asked by eek
  118. math

    A house is rented for $2000 per quarter, with each quarter's rent payable in advance. If money is worth 2%, compounded quarterly, and the rent is deposited in an account, what is the future value of the rent for one year?

    asked by plz help
  119. math

    What is the size of the payments that must be deposited at the beginning of each 6-month period in an account that pays 6.6%, compounded semiannually, so that the account will have a future value of $140,000 at the end of 17 years?

    asked by plz help
  120. finite math

    A young executive deposits $400 at the end of each month for 7 years and then increases the deposits. If the account earns 7.2%, compounded monthly, how much (to the nearest dollar) should each new deposit be in order to have a total of $400,000 after 25

    asked by distressed
  121. physics

    Jack and Jill blow their whistles at the same time producing sound waves at frequencies of 400 Hz and 404 Hz respectively. How many beats per second are heard from the superposition of the two waves? Choose one answer. a. 400 b. 404 c. 4 d. 8

    asked by ashley --
  122. physics

    What is the magnification of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? Choose one answer. a. 0.33 b. -0.33 c. 1.33 d. -1.33

    asked by ashley --
  123. physics

    What is the image distance of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? Choose one answer. a. -13.3 cm b. 13.3 cm c. -40.0 cm d. 40.0 cm

    asked by ashley --
  124. math

    whats the excluded value of 30k - 20 over 90k

    asked by Charnai Smith
  125. physics ---- really dnt get this at all

    A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the image distance? Choose one answer. a. -21.4 cm b. 21.4 cm c. 65 cm d. 35 cm

    asked by ashley --
  126. Really Confused

    About the Trading posts...HBC and NWC. Why were many posts of the rival companies placed next to each other? This is so confusing. I am thinking that it might be for business matters, but I would like the whole thing please. And no sites, since they do not

    asked by Anonymous
  127. physics

    Monochromatic light of wavelength 550 nm passes through a diffraction grating that has 55000 lines/m. A bright line appears on the screen at an angle of 12.23o from the central bright fringe. What is the order of this bright line? Choose one answer. a. 5

    asked by ashley --
  128. physics ---- really dnt get this at all

    The third harmonic of a guitar string has a frequency of 170 Hz. What is the length of the guitar string if the speed of the waves on the string is 125 m/s? Choose one answer. a. 1.103 m b. 2.206 m c. 0.368 m d. 2.040 m

    asked by ashley --
  129. physics

    Marks: 2 Light cannot be linearly polarized by: Choose one answer. a. transmission b. reflection c. diffraction d. scattering

    asked by ashley --
  130. physics

    Marks: 5 In an experiment conducted using the Young's double-slit apparatus, the separation between the slits is 20 µm. A first-order constructive interference fringe appears at an angle of 2.5o from the zeroth order (central) fringe. A. What wavelength

    asked by ashley --
  131. physics

    What is the angle of refraction of a light ray that enters the surface of a calm lake from air at an angle of 45o to the normal? The refractive index of water is 1.333. Choose one answer. a. 32.04o b. 45.00o c. 59.99o d. 33.76o

    asked by ashley --
  132. physics

    What is the critical angle of light traveling from benzene (n=1.501) into air? Choose one answer. a. 40.05o b. 48.22o c. 41.78o d. 62.63o

    asked by ashley --
  133. physics

    Which of the following statements is not true about resonance? Choose one answer. a. It is easy to get an object to vibrate at its resonant frequencies but difficult to get it vibrate at other frequencies. b. A simple pendulum has many resonant frequencies

    asked by ashley --
  134. Philosophy ( Critical Thinking)

    1. The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses (Points : 1) Jerry with

    asked by Jean
  135. Science

    A vibrating string produces the highest pitch if it's; A) loose and long B) loose and short C) tight and long D) tight and short

    asked by Lekeisha
  136. Physics Urgent!!

    Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in

    asked by Abi
  137. Trading Posts, dont get it.

    What were the effects of having to use rivers to complete such long journeys? I don't know. Please help.

    asked by Anonymous
  138. Engliu

    I have a few more doubts. I also wanted to know if the sentence "It was three days since I had last met him" is a mistake. I just applied a grammar rule according to which "it was ... is followd by the past perfect with the meaning "I hadn't met him for

    asked by Henry1
  139. Math

    Select a variable (mean or proportion) to determine if there is a difference in the two groups. Samples must be independent. Select a sample of data values (20 to 50) for each group. Then address the following (and a little more) in your project. a. Write

    asked by bill
  140. English

    I'm posting you my questions again since I mispelt the word English before. Thank you very much for your help! I have a few more doubts. I also wanted to know if the sentence "It was three days since I had last met him" is a mistake. I just applied a

    asked by Henry1
  141. Trading Posts

    About the Trading posts...HBC and NWC. Why were many posts of the rival companies placed next to each other? This is so confusing. I am thinking that it might be for business matters, but I would like the whole thing please. And no sites, since they do not

    asked by Anonymous
  142. Math

    Below are the amounts of money a waiter earned each day last week. $120 , $170 , $150 , $190 , $130 , $200 , $160 . What is the interquartile ?

    asked by Edwin Rodriguez
  143. pLZ help

    Select a variable (mean or proportion) to determine if there is a difference in the two groups. Samples must be independent. Select a sample of data values (20 to 50) for each group. Then address the following (and a little more) in your project. a. Write

    asked by bill
  144. Math

    Whats 6 x 4 ?

    asked by Katrina Alex
  145. Chemistry

    The Hydrolysis Reactions - Write net-ionic equations for the reaction of each salt with water below. If there is no reaction, write N.R. 1. NH4C2H3O2 2. NH4Cl 3. NaCl 4. Na2CO3 5. NaC2H3O2 6. NaHSO4 7. FeCl3 8. NaH2PO4 9. NaHCO3

    asked by K
  146. Critical Thinking (philosophy)

    1. 21{1[2(24)24]}> The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses (Points : 1)

    asked by Jean
  147. Chemistry

    A mixture of KCI and KClO3 weighing 1.80g was heated. The dry O2 generated occupied 140ml at STP. What percent of the original mixture was KCl03?

    asked by Lisa
  148. chemistry

    How many grams of sodium are contained in 10 grams of sodium sulfate?

    asked by Anonymous
  149. chemistry

    OF THE FOLLOWING SUBSTANCES, WHICH HAS THE LARGEST AVERAGE SPEED AT 25DEGREES. CO, NH3,H2,N2?

    asked by Joe
  150. Math

    Determine the integral by making an appropriate substitution integral of 8x cuberoot srqt(4x^2-9) dx let u= 4x^2-9 du= 8x dx I do not know what to do now

    asked by Hannah
  151. physics

    Which of the following statements is true about a mass, which is attached to a spring and moves with simple harmonic motion on a frictionless horizontal surface? Choose one answer. a. The kinetic energy of the mass is maximum at the end positions. b. The

    asked by ashley --- HELP PLEASEE!!!
  152. physics

    A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the image distance? Choose one answer. a. -21.4 cm b. 21.4 cm c. 65 cm d. 35 cm

    asked by ashley --- HELP PLEASEE!!!
  153. math

    A young executive deposits $400 at the end of each month for 7 years and then increases the deposits. If the account earns 7.2%, compounded monthly, how much (to the nearest dollar) should each new deposit be in order to have a total of $400,000 after 25

    asked by worried
  154. math

    Suppose a young couple deposits $700 at the end of each quarter in an account that earns 7.1%, compounded quarterly, for a period of 6 years. After the 6 years, they start a family and find they can contribute only $200 per quarter. If they leave the money

    asked by cant figure this out :(
  155. math

    What is the size of the payments that must be deposited at the beginning of each 6-month period in an account that pays 6.6%, compounded semiannually, so that the account will have a future value of $140,000 at the end of 17 years?

    asked by cant figure this out :(
  156. Religious Studies

    1. What is “the problem of evil,” and why is it particularly problematic for Western, monotheistic religious traditions?

    asked by Lily
  157. Art History

    Help please... What do you believe the amphitheater in Pompeii reveals about the culture that created it?

    asked by Alex
  158. Physics Urgent!!!!!

    Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in

    asked by Abi
  159. Math(Please check. Thank You)

    1) solve:e^x(x^2-4)=0 e^x=0 and then (x+2)(x-2) so x=2, -2 2) differentiate: y=ln(6x^2 - 3x + 1) 1/(6x^2 - 3x + 1) * 12x-3 3) differentiate: y=e^-3x+2 -3 * e^-3x+2 4) evaluate: 2^4-x=8 2^4-x = 2^3 4-x = 3 -x=-1 so x=1 5) differentiate: x^3 + y^3 -6 =0 3x^2

    asked by Hannah
  160. math

    Find a 4-digit number so that if you put a decimal point in the middle the number you get is the average of the two numbers on either side??

    asked by that_chick
  161. calculus

    Find the coordinates of the vertex of the graph of f(x)=2x^2+10-1

    asked by Anonymous
  162. Calculus

    Find the coordinates of the vertex of the graph of f(x)=2x^2+10x-17.

    asked by Anonymous
  163. Religious Studies

    From an academic perspective, when does the Job text first emerge in history?

    asked by Lily
  164. PHYSICAL SCIENCE

    compute the freezing point of 21.6 g CuSO4 in 1.00 x10 to the 2nd power gH2O

    asked by Anonymous
  165. Economics

    Use the following calculations in the relevant formulas to answer the questions Need Help don't know where to start n = 7 ¢²(x − x̄)©÷ = 4,924.00 x̄ =44 ¢²(y − ȳ)©÷ = 904,627.43 ȳ =553 ¢²(y − ŷ)©÷ = 35,168.50 ¢²xy =235,843

    asked by Kieran McCamment
  166. geometry

    I have a triangle garden in my backyard. one side is 4 meters and another side is 6 meters. the angle formed by these two sides is 72 degrees. what is the area of the garden?

    asked by Shauna
  167. Social Studies

    Put these facts in your only words *Metacomet is an indian cheif who hated christianity. * He would always turn down offers to convert to christianity. *He was the second son of Massasoit *Massasoit died in 1661 *Metacom's older brother Alexander was chief

    asked by Frances
  168. Economics

    Use the following calculations in the relevant formulas to answer the questions Need Help don't know where to start n = 7 (Greek)E(x − x̄) = 4,924.00 x̄ =44 E(y − ȳ)= 904,627.43 ȳ =553 E(y − ŷ)= 35,168.50 Exy =235,843 E(ŷ − ȳ)=

    asked by Kieran McCamment
  169. math

    you have16 coins that are heads up an18 coins that are tails up. After you add some coins that are tails up, the ratio of heads up to tails up is 1 to 1.5. How many coins are tails up? How many coins are in all?

    asked by Lance
  170. calculus

    Evaluate the Integral ∫1, 0 x^3(1+x^4)^6dx where 1=b 0=a for the limits

    asked by noell
  171. Math grade 11

    An observer in a hot air balloon some distance away from the aqueduct determines that the angle of each depression to each end is 54 degrees and 71 degrees. The closest end of the aqueduct is 270 m from the balloon. Calculate the length of the aqueduct to

    asked by Anonymous
  172. aglbera

    A 125-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 25 ft longer that the height that it reaches on the side of the bridge. Find the horizontal and

    asked by kozy
  173. calculus

    Find the general indefinite integral ∫cosxsin^4xdx

    asked by noell
  174. algebra

    A 125-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 25 ft longer that the height that it reaches on the side of the bridge. Find the horizontal and

    asked by kozy
  175. differential calculus

    use the product rule to find the derivatives of the given function y=(3x^2-8)^2

    asked by ash
  176. healthcare

    What are the benefits and challenges of one technologically based communication modality—e-mail, a web-based forum, and so forth—involving patients and health care providers? at least 2 benefits and 2 challenges

    asked by bobbi
  177. physics

    what is the value of electric field intesity at a point between two co centric sphere

    asked by Anonymous
  178. child psychology

    the only ssri that's currently fda approved for the treatment of depression in children is a.paraxetine(paxil) b.fluxetine(prozac) c.sertraline(zoloft) d.trimoxiphine(xantax) I chose A im still unsure

    asked by alicia
  179. 6th grade english

    I was just checking to see if anyone read my response to the information that you all gave me. I was asked to check back with you all. My post was at 5:49pm Thanks

    asked by Linda
  180. programming logic and design

    what is the output by each psuedocode segments ? 1. a=1 b=2 c=5 while af d=d+1 e=e -1 endwhile output d, e, f 3. g=4 h=6 while g

    asked by michael
  181. Trading Posts

    About the Trading posts...HBC and NWC. Why were many posts of the rival companies placed next to each other? Okay so this is because of competition. Individuals seeked for different benefits. Please Ms. Sue help me expand on this.

    asked by Anonymous
  182. math

    Select a variable (mean or proportion) to determine if there is a difference in the two groups. Samples must be independent. Select a sample of data values (20 to 50) for each group. Then address the following (and a little more) in your project. a. Write

    asked by mike
  183. Science

    What is friction? I don't understand the definition.

    asked by Christina
  184. Algebra

    solve the eauation check for extraneous solutions. log5 x=4

    asked by Ashley
  185. chemistry

    Calculate the pH at each stage in the titration of 25.0 ml 0.10 M KOH(aq) with 0.25 M HCl(aq). 1. Initiall ( before titration). 2. After addition of 5 ml of HCl. 3. After addition of 9.5 ml of HCl. 4. At the equivalent point. 5. After addition of 12 ml of

    asked by jonah
  186. Algebra Unit Analysis

    I am doing Unit Analysis and I can not fugure out how to set the promble up on these 3. I just need to know how to set it up I can figure out the answer. 1.How many cubic meters are there in a cubic mile? (1 mi = 1609.344 m.) 2.My 1967 Encyclopædia

    asked by Shawn L
  187. Algebra

    Solve the equation. 2log3 y = log3 4+ log3 (y+8) Here's what ive got take out the logs and say y^2= 4+ y +8 which simplifies to (y^2)-y=12 how do i simplfy the y?

    asked by Kenya
  188. Math (difficult)

    The value of a new car purchased for $28,000 decreases 8% per year. Write an exponential decay model for the value of the car. Use the model to estimate the value after 5 years.

    asked by Benjamin
  189. Calculus

    Find the derivative of y=x^2/ln3x.

    asked by Anonymous
  190. math

    If $86,000 is invested in an annuity that earns 5.2%, compounded quarterly, what payments will it provide at the end of each quarter for the next 3½ years?

    asked by ughh help
  191. Math

    Suppose an annuity will pay $18,000 at the beginning of each year for the next 8 years. How much money is needed to start this annuity if it earns 6.9%, compounded annually?

    asked by math help plz
  192. math

    A used piece of rental equipment has 3½ years of useful life remaining. When rented, the equipment brings in $300 per month (paid at the beginning of the month). If the equipment is sold now and money is worth 5%, compounded monthly, what must the selling

    asked by math help plz
  193. math

    Suppose an individual makes an initial investment of $1100 in an account that earns 7.5%, compounded monthly, and makes additional contributions of $100 at the end of each month for a period of 12 years. After these 12 years, this individual wants to make

    asked by help me i'm stuck
  194. math

    The terms of a single parent's will indicate that a child will receive an ordinary annuity of $20,000 per year from age 18 to age 24 (so the child can attend college) and that the balance of the estate goes to a niece. If the parent dies on the child's

    asked by stuck on this one ?
  195. Leadership

    “Big Changes for a Small Hospital” As F. Nicholas Jacobs toured the Windber Medical Center facility, he was dismayed by the industrial pink painted walls, the circa 1970 furniture, and the snow leaking through the windows of the conference room.

    asked by Tebbie
  196. CHEM

    What is the number of "UNBOUND" electrons in H2O...its not 0 or 2....is it 1??

    asked by CHEMISTRY
  197. Advanced Algebra

    Find the exponential function of the form y=ax^b whose graph passes through the points (-3, 1/27) and (0,1). I don't know where to begin with this problem??

    asked by Anonymous