Questions Asked on
March 17, 2008

  1. math

    why do dragons sleep during the day

    asked by aaron
  2. Chemistry

    1. Which of the following is not true? a. The freezing point of sea water is lower than the freezing point of pure water. b. The boiling point of a water sample from the Salt Lake is lower than the boiling point of pure water. c. The freezing point of 0.1

    asked by Cameo
  3. Astronomy

    If you lived on Mars, which planets would describe retrograde loops? Which would never be visible as crecent phases?

    asked by Lindsay
  4. physics

    The automobile is originally at rest at s = 0. If its speed is increased by dv/dt = (0.05t2)ft/s2, where t is in seconds, determine magnitudes of its velocity and acceleration when t = 18 s.

    asked by shan
  5. Algebra

    Can someone help me, I am stuck and do not know how to complete. Maybe my first part is wrong, I don't understand by looking at my example if I am doing it right or not. Square root Property 2k^2 +144=0 2k^2 +144-144=0-144 2k^2=-144 This is where I am

    asked by Bethany
  6. math

    While on vacation, Kevin went for a swim in a nearby lake. Swimming against the current, it took him 8 minutes to swim 200 meters. Swimming back to shore with the current took half as long. Find Kevin's average swimming speed and the speed of the lake's

    asked by jason
  7. organic chem

    Please help! It's one of the prelab questions. **Exp. Ethanol from Sucrose The diethylacetal of acetaldehyde can be detected by gas chromatography. How does this impurity arise in fermentation? **Exp. Acetaminophen In the reaction between p-aminophenol and

    asked by Vivian
  8. Chemistry

    The theoretical percent of Copper (II)Oxide is 79.9%. What are two reasons why the percent of Copper in Copper (II) may vary from 79.9%

    asked by Shaun
  9. math

    Suppose you are starting an office-cleaning service. You have spent $315. To clean an office, you use $4 worth of supplies. You charge $25 per office. How many offices must you clean to break even? I don't understand this. I just made an equation, 4x + 25y

    asked by johnny
  10. Trigonometry

    Hello, everyone: I am working on finding the exact values of angles that are less common and are therefor not found easily on the Unit Circle (at least, they are not labeled). For example, the problem I am asking about is: 10) Find the exact values of the

    asked by Timothy
  11. Chemistry

    Is it always apparent in a solution which component is the solute, for example, in a solution of liquid in a liquid?

    asked by Tyran
  12. science

    chemical analysis shows that citric acid contains 37.51% C, 420% H, and 58.29% O. What is the empirical formula for citric acid?

    asked by john
  13. Math

    A pizza shop has 6 meat toppings, 5 vegetable toppings, and 3 cheese toppings. How many different pizza's (one meat, one veg. and one cheese topping) can be made?

    asked by Sandy
  14. Astronomy

    If a space probe were sent into orbit around the sun that brought it as close as 0.5 AU to the sun and as far away as 5.5 AU, what would its orbital period be? Can I use Kepler's 3rd law for this? I'm not sure how to take into account both AUs...

    asked by Lindsay
  15. Science

    What is a common mineral in solid form? A rock _ _ _ _?

    asked by Violet
  16. algerbra

    AN ORCHESTRA CONSISTS OF STRINGS INSTRAMENTS AND WIND INSTIMENTS IN A RATIO OF 9 TO 4. THERE ARE 91 STRINGS AND WIND INSTRUMENTS IN THE ORCHESTRA. hOW MANY STRING INSTRUMENTS ARE THERE? how many wind instruments? Use a system of equation to model each

    asked by kelly
  17. Math

    One positive number is 8 more than another. The sum of their squares is 104. Find both numbers.

    asked by Ben
  18. Algebra

    A student opens a math book to 2 facing pages. The product of the page numbers is 930. Find the page numbers.

    asked by SuziQ
  19. math

    When Beth finishes college, she has a balance of $2876.37 on a credit card with an annual percentage rate (APR) of 17.3%. She decides not to make any additional purchases with her card until she has paid off the balance. Assuming the minimum payment is 2%

    asked by linna
  20. physics

    pulsar is a rapidly rotating neutron star that emits radio pulses with precise synchronization, there being one such pulse for each rotation of the star. The period of rotation is found by measuring the time between pulses. At present, the pulsar in the

    asked by shelby
  21. Physics

    One volt is the potential difference between two points if 1 joule of energy is needed to move _____ coulomb of charge between the two points.

    asked by Anonymous
  22. Physical Science

    If you poked 3 holes in a vertical line in a bottle filled with water, which hole will spurt water the furthest? Why? -thanks so much for your help!

    asked by Ellen
  23. Math

    5 coins are tossed. How many outcomes are possible?

    asked by Jesse
  24. business

    For a given nominal interest rate, an unexpectedly low inflation rate ______ the real interest rate. a. increases b. decreases c. has no impact on d. may either increase or decrease e. is subtracted from

    asked by Drew
  25. Chinese

    Do you know any good, free audio dictionary-type websites that speack chinese?

    asked by Kurst
  26. Fractions / math

    Okay, for these two questions I have the answers - but I can't figure out the process. HOW did they get these answers? 1. There are 132 members of the Volunteer Fire Dept. At a recent alarm, 1/4 of the volunteers responded. How many volunteers did NOT

    asked by Claire
  27. English Grammar

    Which is correct: She is in her office. or She is at her office.

    asked by Diane
  28. chemistry

    Define a lewis base. Can OH- function as a Lewis base?

    asked by Anonymous
  29. english

    visions shadow by simon ortiz what are the concerns for the environment, love of nature, or the symbol of the eagle.

    asked by kayla
  30. Algebra II

    Solve: (1/81)^t=243^t-2 The book states to get the same base but I don't understand. Thanks for any help.

    asked by Lucy
  31. science

    please explain the difference between pitch and volume in sound

    asked by matt
  32. 5th grade math

    how do I multiply 18 x 3/5= 18/1 x 3/5, do i find common denominator, then straight across?

    asked by Melissa
  33. Chemistry

    Calculate the theoretical yield of MnO3 when 2.0 moles of Mn react with 2.0 moles O2. Write a balanced equation for the reation.

    asked by AR
  34. math

    $4,000 at 10.5% for 6 months

    asked by Sandy
  35. Physics

    Lucky you have been commissioned to design a Bobsled Run for the new theme park Walrus of Fun going up in Anchorage, Alaska. You get a maximum of 1500 meters of track to work with. Except on the turns the coefficient of kinetic friction is .15. Here is

    asked by Ashley
  36. calculus

    does the series from n=1 to infinity of 1/arctan(2n) converge? I said yes but I didn't know what to

    asked by john
  37. Maths

    A circle C passes through the point (-12,9) and is given by the equation (x-a)^2 + (y-b)^2 = r^2. If the equation of the tangent to the given circle at the point (-4,1) is given by x-y+5=0, find the values of a,b and r. The answers have to be a=-8, b=5

    asked by Claire
  38. religions of the world

    how are newer religions different from older one? How are they similar?

    asked by Attivia
  39. Biology

    Why does the blood go from the lungs to pick up oxygen and then return back to the heart to be pumped around the body ? Why can't it just get out of the lungs from the first pump and then pick up an artery and go around of the body instead of returning ?

    asked by ASA
  40. physics

    A wheel, starting from rest, has a constant angular acceleration of 1.3 rad/s2. In a 2.5-s interval, it turns through an angle of 98 rad. How long has the wheel been in motion at the start of this 2.5-s interval?

    asked by shelby
  41. English Grammar

    base verb basic verb base from of the verb the dictionary form root verb verb root root of the verb bare infinitive infinitive without the 'to' ----------------------------- Are they all the same? Are there any words which are not correct? What is the

    asked by John
  42. math

    Hi, How could I find the line of best fit? I plotted each of the equations I had for a problem I'm solving. The equations were linear (y=ax+b) and quadratic (y=ax+b+c). I'm supposed to find out which line is the most appropriate for the data that is given

    asked by Irene
  43. Biology

    I am doing an essay about the nuclear envelope. However, I can't find very good information about the function of this organelle. For example, how does the nuclear envelope protect the nucleus?

    asked by Natalia
  44. English Pronunciation

    He washes the dishes every day. How do you pronounce 'washes the' in fast speech? Do we have to pronounce /wash the/ or /wshes uh/?

    asked by John
  45. Math

    Please help me Place each of the following sets in ascending order 3/7, - 6/7, 1/7, - 1/2,2/7 Perform the indicated operations (-9)(5) / -3 16/(-2)*(-4) / 2*2*2+4 4-(-3)+1 / 2-2divide(-2)

    asked by Sherri
  46. Chemistry

    Why is CH2CL2 a polar molecule even though it is a symmetrical molecule?

    asked by Anonymous
  47. advanced math

    I'm not sure how to find the line of best fit. I have two equations, linear and quadratic. I graphed them on my calculator, but now I don't know which one is the best fit. Can I tell by the r^2?

    asked by Irene
  48. language arts

    a person who studies and collects rocks for fun

    asked by Luke
  49. equations and inequalities

    2x/x-3-1/2=2/2x-6

    asked by jasmine
  50. AED 200

    Teachers need to have skill in using a variety of technologies. Learn to use a technology that you have not used before, or learn a new application of a technology you have used before. Use the technology to develop a teaching product that you might be

    asked by Dawn
  51. science [help please]

    Why can salt water be considered both a mixture and a solution? Describe what is happening at the particle level when an M&M dissolves.

    asked by astrid
  52. economics

    The U.S.-dollar-per-euro exchange rate was 0.8703 on Monday and 0.8807 on Tuesday. Did the euro depreciate or appreciate relative to the dollar? How much in percent did it appreciate or depreciate?

    asked by Jim
  53. Pre Cal

    2cos*2x-cosx=1 find all solutions to the equation on the domain [0,2ð] i got ð/4, 7ð/4, 3ð/4, and 5ð/4 but only got two out of four points... what did i do wrong?

    asked by Kindell
  54. calculus

    does this series converge, and if so is it absolutely convergent? the series from n=1 to infinity of ((-1)^*n+1))/n^4 I found that by the ratio test it was inconclusive, so no abs. conv is this right? and how do i know if it is simply convergent?

    asked by matt
  55. advanced math

    Hi, My equation is 4x^2-8. I think the independent variable for the equation is 4 and the dependent is x. Is that right? I also have to find the domain and range but I'm not sure how to find those for this equation.

    asked by Melissa
  56. pre-algebra

    You are working on a polynomials problem with algebra tiles. You have five big squares, seven rectangles, and eight small squares on your desk. your classmate leans over and borrows three big squares, one rectangle, and five small squares. Write an

    asked by Dj
  57. american history

    What were 10 problems facing america after the civil war and why were they problems?

    asked by sami
  58. social studies

    what are the five social scientist

    asked by rynesha
  59. geometry

    all sides different lengths name the polygon8

    asked by alisa
  60. Ethics

    Since I never got any real help with this. I'll repost the question, reworded. I have to compare and contrast two theories in ethics. So I've chosen Utilitarianism and Hedonism. Explaining what each are, how they are used today, and a summary of how they

    asked by George
  61. Algebra II

    Use the equation of the exponential function whose graph passes through the points (0,-2) and (2,-50) to find the value of y when x = -2. I know the formula is y=ab^x but I don't know what numbers to plug in. Any help would be great. Thanks.

    asked by Lucy
  62. Algebra II

    Simplify: (s^7ã11)/(sã11) I think it is s^8ã11 Is this correct??

    asked by Lucy
  63. writing..some history involved...

    hi i have to write about why i would or would not join the nazis...i chose not to...but i can't find much info. to support why i wouldn't join. i also need to explain how the nazi propagandas affect me... do u have any info i can use...or good websites??

    asked by tina
  64. AED 200

    Most schools and classrooms in the United States have ELL students. Now is the time for you to begin think- ing and planning for what you will do to make sure ELL students in your classes are successful learners. In 200-300 words outline your list and

    asked by Dawn
  65. alg 2

    I have to simplify this expression. a little three square root 4/ a little 6 root 16. How would i get one.

    asked by Miley
  66. Chemistry

    What are sigma bonds and pi bonds?

    asked by Anonymous
  67. Chemistry

    Why does Aluminum and Sulfur have low ionization energies?

    asked by Anonymous
  68. English really stuck

    Please help I am having a bit of trouble I need to write two separate paragrapghs of eight to twelve sentences each based on the following scenarios. (I can make up details if I need to to make my paragraphs more realistic.... Paragraph 1.. I have applied

    asked by Lucie
  69. Math

    What is the least number divisible by 2,3,5,and 8?

    asked by Angie
  70. Math

    One number is 9 more than another number. If the product of the two numbers is -20, find both numbers.

    asked by Ben
  71. spelling

    When alphabetizing plurals, which comes first, girl's or girls'?

    asked by Ireland
  72. math

    Solve the equation Vx + 7 +5=9 a) -3 b) 9 c) 23 d) 16 V= real number root aka 2nd x2 on graphing calc

    asked by john
  73. science

    Why can salt water be considered both a mixture and a solution? Describe what is happening at the particle level when an M&M dissolves.

    asked by Astrid
  74. health

    the nurse explains that the HIV virus is introuduced to the systemic circulation by the -----------,which are found in the mucous membranes i need so much help on this question i have been trying to figure this put for the past two days please help?

    asked by nick
  75. Math

    12 is 40% of what number?

    asked by Anthony
  76. functions

    hi i was wondering what would be the domain and range restrictions that to the function f(x)=(-1/3)x^2+8, and how to find them, because i don't get it. tnx

    asked by mark
  77. Math: Equations of Lines

    [b]WHERE DID I GO WRONG?[/b] [b]Question:[/b] Find the intersection of each pair of lines. If they do not meet, determine whether they are parallel and distinct or skew. n) [(x - 3)/4] = [y - 2] = [z - 2] [(x - 2)/-3] = [(y + 1)/2] = [(z - 2)/-1]

    asked by Anonymous
  78. algebra

    Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get 360-lb mixture that is 11% protein? How many pounds of cornmeal should be in the mixture? How many pounds of the soybean meal should be in

    asked by Anonymous
  79. algebra

    Solve the equation Vx + 7 +5=9 a) -3 b) 9 c) 23 d) 16 V= real number root aka 2nd x2 on graphing calc

    asked by john
  80. oceanography

    A monster storm located 1200 km north of Hawaii generates wind waves with maximum wavelengths of 150 m. Calculate how much time you have to get to the north shore and surf the first big waves. Assume that the average depth of the North Pacific is 3800 m,

    asked by Dan
  81. math

    I have to plan a route from my hometown to Miami, FL. Gas has to be purchased within 2 miles of starting point, 20 gallon gas tank - 18 miles to a gallon. Round trip completed within 48 hours. I do not know the steps to complete this assignment. I only

    asked by jay
  82. Chemistry

    Why would hexane dissolve benzene but will not dissolve sodium chloride?

    asked by Saleshia
  83. Math: Equations of Lines

    I DON'T KNOW HOW TO RETRIEVE THE TEXTBOOK ANSWER! QUESTION: Show that the lines: r = (4,7,-1) + t(4,8,-4) r = (1,5,4) + u(-1,2,3) intersect at right angles and find POI. ============================ ATTEMPT: v = (4,8,-4) x (-1,2,3) v = (32,-8,16) v =

    asked by Anonymous
  84. science

    when an electron is displaced in a semiconductor, the hole that's left behind is considered an impurity in the crystal?

    asked by Anonymous
  85. fraction

    Give examples of three categories of fraction models. What real models have you used that correspond to each of these? I pretty much understand the first part of this question: I know that the three models are set model, length or measurement model and

    asked by Ashley
  86. COM 135

    Can anyone help me add more information to this? Changing a baby’s diaper can sometimes be very challenging. This manual will help glide you through the process after you practice, practice, and practice. Sometimes, even people with past-experience need

    asked by Dawn
  87. finance

    What are some potential reasons for a negative growth rate in dividends?

    asked by wizard
  88. Chemistry

    Why will hexane dissolve benzene but will not dissolve sodium chloride?

    asked by Saleshia
  89. chem

    when u pierce a hole in a bottle filled with water, but the cap is on, why doesnt the water spill out through the hole?

    asked by Jacksonb
  90. english

    Although most of us take it completely for granted, the telephone you have in your house is one of the most amazing devices ever created. What type of introduction does the writer use? What is the impact of that kind of introduction in this essay?

    asked by rose
  91. Math: Elementary

    How can children's concepts of partitioning need to be refined to produce a concept of fractional parts?

    asked by Mary
  92. calculus

    what does this series, if it converges, converge to? the series from n=1 to infinity of (2^n + (-1)^n)/3^n

    asked by sarah
  93. calculus-repost-thanks

    Is this correct? determine if absolutely convergent and convergent 1. the series from n=0 to infinity of ((-1)^n)/n! I said it was abs. conv, and therefore conv 2. the series from n=0 to infinity of (-1)^n/(the square root of (n^2+n+1)) I said ratio test

    asked by john
  94. calculus

    does this series converge, and if so is it absolutely convergent? the series from n=1 to infinity of ((-1)^*n+1))/n^4 I found that by the ratio test it was inconclusive, so no abs. conv is this right? and how do i know if it is simply convergent?

    asked by matt
  95. calc- thanks!

    is this series convergent the series from n=0 to infinity of (n^2+1)/(n^3+1) i said it converged at n=1

    asked by matt
  96. French

    what do the phrases "Je veux me battre" and "voulu mettre ton destin à genou" (there not related).?

    asked by Kurst
  97. English Grammar

    1. He tattos a rose on his arm. 2. He woos the girl to marry him. Are the sentences grammatical?

    asked by John
  98. English Grammar

    You work hard. In this sentence, 'work' is the form of the present tense. We use the base form of a verb for the form of the present tense verb. ----------------------------------- Is my explanation above grammatical? Which one is right, base verb or basic

    asked by John
  99. physics

    The uniform rod AB is suspended in air and its two ends are attached to supports by hinges.The rod has a weight of 15 lb and the spring is unstretched when θ = 0°. If θ = 30°, determine the stiffness k of the spring so that the rod is in equilibrium.

    asked by shan
  100. Chemistry

    Of the following, _______ is a correct statment of Boyle's law.

    asked by Angel
  101. ENGLISH

    who is the most interesting famous person

    asked by brandon
  102. American Lit.

    I have to write a 2 page response essay on Babylon Revisited. Any suggestions.

    asked by Ashley
  103. physics

    In a simple model of the wind speed associated with hurricane Emily, we assume there is calm eye 10.0 km in radius. The winds, which extend to a height of 5550 m, begin with a speed of 208.0 km/hr at the eye wall and decrease linearly with radial distance

    asked by shelby
  104. oceanography

    How do temperature and salinity vary in ocean basins?

    asked by Maddie
  105. math

    I need to know how to do percents. Example: what is 6% of 18?

    asked by Megan