Questions Asked on
November 7, 2008

  1. Physics

    A child's game consists of a block that attaches to a table with a suction cup, a spring connected to that block, a ball, and a launching ramp. By compressing the spring, the child can launch the ball up the ramp. The spring has a spring constant k, the

    asked by rachel
  2. chemistry

    A 2.91 gram sample of a gaseous compound that contains only boron and hydrogen has a volume of 1.22 L at 25°C and 1.09 atm. What is the formula of this compound? (Atomic Weight: H = 1.01, B = 10.8 amu) I am not sure but it is B6H10? But I am nto sure if

    asked by songyi
  3. Chem

    Hi everyone, I'm having problems with effective nuclear charge. Regarding these problems. Calculate Zeff for a valence electron in an oxygen atom. and Calculate Zeff for the 4s electron in a copper atom, . and Calculate Zeff for a 3d electron in a copper

    asked by Vinny
  4. Calculus

    (a) Find dy/dx given that x^2+y^2-4x+7y=15. (b) Under what conditions on x and/or y is the tangent line to this curve horizontal? Vertical? For part A, I simplifid it to -(2x+4/2y+7) For part B,I am confused on what to do?

    asked by George
  5. intermediate algebra

    Write the equation of the line containing (-3,4) and perpendicular to y = 2/3x + 2. Write your answer in slope-intercept form. Not sure how to do this one. please help.

    asked by jennifer
  6. Physics

    At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at

    asked by Samantha
  7. math

    solve by the substitution method 3x + 6y = 27 -2x + y = 12 what is the solution of the system..(type an ordered pair, or N if there is no solution)

    asked by mikey123
  8. physics help

    1. A roller coaster car starts from rest and rolls down a frictionless track, reaching speed fv at the bottom. a. If you want the car to go two times as fast at the bottom, by what factor must you increase the height of the track? b. Does your answer to

    asked by joyce
  9. 6th grade

    What is the height of the Washington Monoment in 1882?

    asked by Casrniesha
  10. 6th grade English

    How does point of view affect a story?

    asked by Emma Leigh
  11. chem

    a compound containing only boron, nitrogen and hydrogen was found to be 40.3% B, 52.2%N, and 7.5% H by mass. If 3.301g of this compound is dissolved in 50.00g of benzene, the solution produced freezes at 1.30 degrees celsius. If Kf(freezing point

    asked by tomi
  12. math

    The makers of Crinkle Crackers had a special offer: "collect 8 labels and get 1 bag free." Jim asked his friends for their labels. He collected 85 labels in all. How many free bags of crinkle crackers did he get? How did you solve? I think the answer is 10

    asked by Paige/Colton
  13. Math

    If you start with one penny, and double it each day (1c, 2c, 4c, 8c, 16c...) how many days will it take to reach one million dollars? Same thing with a nickel (5c, 10c, 20c, 40c...). How many days to reach one million dollars?

    asked by Dono
  14. chemistry

    What is the theoretical yield in grams of the precipitate starting with 1.250 moles of iron ions (charge is +3) and 60.00 grams of hydroxide ions?

    asked by matt
  15. physics

    is the force of gravity stronger on a piece of iron than on a piece of wood, if both have the same mass?

    asked by Lee
  16. Algebra

    The table list data regarding the average salaries of several professional athlets in the year 1991 and 2001 Year Average Salary 1991 $252,000 2001 $1,350,000 a) Use the data points to find a linear function that fits the data. b) Use the function to

    asked by PJ
  17. physics

    If you weighed yourself on regular bathroom scale outside, then again inside the Empire State Building and inside your weigh about 350 grams less, why would this be?

    asked by Lee
  18. 8th Grade Algebra1

    I don't understand this question, so if anyone can answer it, that would be great! We are doing motion problems, so as you probably know, the formula is d=rt. (distance equals rate times time.) We have to make a chart to answer the following question... A

    asked by Nicole C.
  19. math

    could you tell me the easiet way to do this problem : 3/4 + 1/5

    asked by Anonymous
  20. intermediate algebra

    Write the equation of the line containing (-3,4) and perpendicular to y = 2/3x + 2. Write your answer in slope-intercept form. Not sure how to do this one. please help.

    asked by jennifer
  21. science

    Somewhere between Earth and the Moon, gravity from these two bodies on a space pod would canel. Is it closer to the Earth or the Moon? why?

    asked by Randy
  22. Science

    Why can multicellular organisms be more complex than unicellular organisms?

    asked by Edwin
  23. physics

    you slide down a pole at a mass of 80kg with an acceleration of 4m/s^2, How do you show that the friction force that acts on you is 480N?

    asked by Madison
  24. Science

    A boxer punches a sheet of paper in midair, bringing it from rest to a speed of 25m/s^2 in 0.05 secind. The mass of the paper is 0.003 kg. Show the force of the punch on the paper is only 1.5 N.

    asked by Madison
  25. physics

    Consider the 59 N weight held by two cables The left-hand cable is horizontal. What is the tension in the cable slanted at an angle of 51◦? Answer in units of N. What is the tension in the horizontal cable? Answer in units of N.

    asked by Greg
  26. physics

    Consider the 59 N weight held by two cables The left-hand cable is horizontal. What is the tension in the cable slanted at an angle of 51◦? Answer in units of N. What is the tension in the horizontal cable? Answer in units of N.

    asked by Greg
  27. calculus

    find the derivative of the function g(x) = (1 + 3x)^6(5 + x - x2)^8

    asked by mark
  28. Science

    4.Which characteristic property must two solids differ if they are to be separated merely by being dissolved at room temperature and filtered?

    asked by Christopher
  29. math

    Calculus Question: Find the derivative of this function: g(x)=ln(ln(x+1))+e^(x^(3/2)+(x/3)) Teacher didn't show how to do a problem like this and my book doesn't show anything like it either. Any help with this will be greatly appreciated.

    asked by courtney
  30. calculus

    Find the derivative of: g(x)=ln(ln(x+1))+e^(x^(3/2)+(x/3))

    asked by brittany
  31. spanish

    How do you conjugate?

    asked by Chel'Sey
  32. Physics Really Need Help Please

    At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at

    asked by Samantha
  33. Homework (in general)--help!

    I was an A/B student a few years ago, and now there's a problem. I'm a 6th grader whose "homework forgetting level" is increasing. For some reason, I often leave some of my homework home. Can you help me so I will then rarely forget my homework?

    asked by frantic
  34. chemistry

    A sample of acid (C,H,O) massing 1.000 g burns to give 1.466 g of carbon dioxide and 0.6001 g of water. The molecular mass is approximately 120 g/mol. Calculate the molecular formula of the acid

    asked by jason
  35. Science

    How can differences in solubility be used to separate a mixture of solids?

    asked by Christopher
  36. essay novel study need ideas and advice

    Jane Austen's novels Pride and prejudice and Persuasion both illustrate the challenges of being a woman in the 1900s. The need to find security, obtain wealth, status and marriage becomes necessary for survival and fulfillment. Unfortunatly, Austen shows

    asked by cin
  37. homework

    In what ways are expository essays similar to business communication? In what ways are they different? What part do facts play in the expository essay? What part does opinion play? Explain your answers in two paragraphs (one discussing similarities and

    asked by Anonymous
  38. spanish

    need to wrote ten sentences using vocab words - vocab word is in brackets can you check these 1. Yo vivo en (la calle) nombre Doheny. 2 Yo tengo (la calculadora) por mathetmatica 3. Por favor (llamar) en el noche 4. El officina tengo dos (el fax) 5. (La

    asked by sam
  39. chemistry

    Calculate the number of grams of reactant left over when 28.35 grams of silver reacts with 50.0 liters of air at STP which is 20.9476 % oxygen by volume. The density of air at STP is 1.292 g/L. attemt at a solution: m = dv = 64.6 g of air moles silver

    asked by jason
  40. Eng

    I really need help on finding the comparsion and contrast of two poets named Andrew Marvell and Matthew Arnold and their Motivition and Method. I been trying for two days now and still have nothing can you help please? Thank You

    asked by LaTarial
  41. accounting

    who do bookkeepers report to? and who reports to the bookkeepers?

    asked by kay
  42. social studies

    what is vimy ridge's significance to canada?

    asked by janette
  43. Implicit Functions

    Find the slope of the tangent to the curve at the point specified. x^3+5x^2y+2y^2=4y+11 at (1,2) So far I simplified it to -(3x^2-10y/5x^2+4y-4) which I think then simplifies to -(8/3). What do I do from here....?

    asked by George
  44. Calculus

    (A) Find the equations of the tangent lines to the circle x^2 +y^2=25 at the points where x=4. (B) Find the equations of the normal lines to this circle at the same points. (The normal line is perpendicular to the tangent line at that point.) (C) At what

    asked by George
  45. genetics/biology

    Bacteria Y has a mutation within it’s genome, at gene R, that provides resistance to neomycin. Bacteria Z is sensitive to neomycin, however, when Bacteria Y is placed in a mixture with Bacteria Z, Bacteria Z also gains neomycin resistance. One cell of

    asked by bebe
  46. Math

    Engineers and physicists are fond of using the approximation Square root (1+x) = 1+(x/2)? What approximation do you suppose the engineers and physicists would use for the quantity (1+x)^(3/2)

    asked by Paul
  47. CHEMISTRY

    I've been trying to do this problem but I would get confused and stuck.. Consider a sample of a hydrocarbon at 0.959 atm and 298 K. Upon combustion the entire sample in oxygen, you collect a mixture of gaseous carbon dioxide and water vapor at 1.51 atm and

    asked by J
  48. reading articles in english

    could you give me some advice how to read academic articles in english?? english is my second language and also I have to read sociological and philosophical texts in english for my master thesis. do you have any idea??

    asked by asia
  49. physics

    An object starts sliding up a plane tilted at an angle of alpha = 5.0◦ to the horizontal. The object’s initial speed is v = 2.0m/s. How far from the start point does the object come to a stop if μK = 0.20?

    asked by Sandhya
  50. english

    what are the basic forms of speech communication?

    asked by Anonymous
  51. geometry

    In triangle ABC, D is the centroid and M is the midpoint of segment AC. If BD=x+9 and DM=6, find MB.

    asked by hannah
  52. geometry

    The vertices of triangle ABC are A(2,2), B(3,-1) and C(0,1). Find the coordinates of the circumcenter. Answer choices:(23/14,3/14), (3/2,0) or (7/9,11/9)

    asked by hannah
  53. science

    Please help me!!! I need to create an expieriment but I need to find a way to measure the amount of co2 in an enclosed small space....is it possible? is there a way?

    asked by Stephanie
  54. geometry

    Triangle NQP is an equilateral triangle with the measure of angle N=5x-2y and the measure of angle P=x+2y. Find the values of x and y.

    asked by Hannah
  55. ETH 125

    Can someone help me with this question Identify leaders of the Civil Rights and Black Power movements and their contributions to their respective causes. How did these social pioneers forge the way for this important ratification? What legislation was

    asked by jscott1
  56. science

    If i place a clear glass of water on the kitchen table what else would i have to do to illustrate how light gets refracted

    asked by mari
  57. geometry

    In acute triangle ABC, segment AD is an altitude, the measure of angle ADB=2x^2+40, BD=9x-3, and DC=6x+15. Find BC.

    asked by Hannah
  58. organizational behavior

    design a model with methods and procedures for analyzing diversity and how you would implement the results in a cultural diversity training program

    asked by charlotte
  59. accounting

    CAN SOMEONE TELL ME HOW MATERIAL AND CONVERSION IS BROKEN UP IN THIS PROBLEM thanks so much PROBLEM 1 Estrella Company, a company that mass produces a widely used pain medication, uses three processes: mixing, tableting, and bottling. October’s cost and

    asked by amy
  60. Math

    Ray AF bisects angle DAB, Ray AE bisects angle DAF, and ray AD bisects angle CAF. Draw a picture that represents this situation. (I drew a picture but I still do not understand.) If the measure of angle DAB=x, find the measure of angle BAC. Answer choices:

    asked by Emma
  61. intermediate algebra

    A right triangle has two legs and a hypotenuse. One leg of the triangle is 3 feet longer than the other leg. The hypotenuse is 15 feet. Find the length of each leg. I got 12 feet and the other leg is 9 feet Is this correct?

    asked by jennifer
  62. Finance

    I don't have a formula for this question: Purchasing Power= 1280.08 (Nov.1/07) Purchasing Power= 1000.00 (Nov.1/97) What is the annual rate of inflation? I think it can be solved 1280.08/1000 -1 but Im not sure??

    asked by Barry
  63. health

    Can tea bags be bad for you in any way if you drink tea with them too much? thanks-MC

    asked by mysterychicken
  64. genetics/biology

    Bacteria Y has a mutation within it’s genome, at gene R, that provides resistance to neomycin. Bacteria Z is sensitive to neomycin, however, when Bacteria Y is placed in a mixture with Bacteria Z, Bacteria Z also gains neomycin resistance. One cell of

    asked by bebe
  65. Algebra

    Equation: RCF=NCF/(1+Pi)^t Can somebody show me how to rearrange the equation to solve for Pi.

    asked by Tom
  66. Math

    quick question. what is 27 written as a power of 3?

    asked by Larry
  67. intermediate algebra

    Pat can design a website in 20 hours. His friend can design the same site in 30 hours. How long will it take to design the website working together? I got 12 hrs. Is this correct?

    asked by jennifer
  68. college

    How do I find McDonald's total profit for 2002? I am in Basic Mathematics at Axia on line. Can anyone please help me with this problem?

    asked by MAT 115
  69. Environmental Science

    2 pages Details: Your comments to the editor of your favorite magazine intrigued her enough to call you and request that you write an editorial, for which, you note with a little surprise, you will be well-paid. She provides you with two topics which she

    asked by donna
  70. HCA 270

    Has anyone taken Axia's HCA 270? Need help on Checkpoint: Ration Analysis.

    asked by ERICKA
  71. gov

    what does collective action have to do with interest groups?

    asked by Lauren
  72. math

    find tge mean, meadian, mode, and range for the set of numbers {76, 37, 56, 53, 46, 37, 63, 67, 36, 46, 55, 66}. a) mean= b) median= c) mode= d) range= is a) 53.17 b) 54 c) 37 and 46 d) 40 if they are wrong can you tell me why?

    asked by chase
  73. Math

    The interest rate on a second mortgage was % last year. This year the interest rate is %. How many percentage points has the interest rate increased?

    asked by Anonymous
  74. o chem

    a-D-glucose and b-d-glucose can best be described as? -diasteromers -constitutional isomers -different conformations -enantiomers -keto-enol isomers

    asked by Jake
  75. Differential Calculus

    Find the limit of (10^x - 5^x)/x as x approaches 0

    asked by Kristen
  76. o chem

    Which is not correct? glucose is a reducing sugar glucose has six carbon atoms glucose undergoes mutarotation glucose is a disaccharide glucose is an aldose

    asked by Jake
  77. math

    For a class of 43 students, for a certain test, the mean grade is 67 and the standard deviation is 7. a) how many students should receive a C? b) how many students should receive a B? c) what score would be necessary to obtain an A?

    asked by chase
  78. Differential Calculus

    use the rule that says limit of (e^h - 1)/h = 1 as h approaches 0 to show that the limit of [ln(x+h)-lnx]/h as h approaches 0 = 1/x, where x>0

    asked by Kristen
  79. Math

    Triangle PQR is a 30-60-90 triangle with right angle Q and segment PQ as the longer leg. Find the possible coordinates of R if (2,6) and Q(2,-6).

    asked by Emma
  80. sci 275

    THIS IS THE ASSINGMENT CAN ANYONE HELP 4. CheckPoint: Terrestrial Resource Plan •Resources: Ch. 12-16 of Visualizing Environmental Science and Appendix F •Due Date: Day 5 [Individual forum] •Choose a terrestrial resource issue discussed in

    asked by angela
  81. Chemistry

    My question is, Hund's rule states that the electrons pair up only after each orbital in a sublevel is occupied by ______. I think its one electron, but the more I read I'm confused because it says about an electron with a spin cycle.

    asked by Sue
  82. albegra

    Graph the equation using the slope and the y-intercept. y=9/5x+5 I NEED HELP PLEASE THERE DO I START

    asked by PJ
  83. chemistry

    Calculate the heat of formation of SiO4(s), given that the heats of formation of SiO2(s), -910.90 KJ/mol; H2O(l), -285.8 KJ/mol; HF (g), -271.1 KJ/mol.

    asked by matt
  84. ALGEBRA

    In 1920, the record for a certain race was 46.6 sec. In 1990, it was 45.9 sec. Let R(t)=therecord in the race and t=the number of years since 1920. a)find a linear function that fits the data. b) Use the function in (a) to predict the record in 2003 and in

    asked by PJ