Questions Asked on
June 22, 2009

  1. chemistry

    The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is:

    asked by matt
  2. physics

    The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what?

    asked by jane
  3. Physics

    The engine of a motorboat delivers 30.0 kW to the propeller while the boat is moving at 15.0m/s. What would be the tension in the towline if the boat were being towed at the same speed? I know to use P=Fv and solve for F so P = 3000kN right because 1 kW =

    asked by Sarah
  4. chemistry

    How do I prepare 10% w/v HCl from 37%(w/w) HCl (density 1.19g/ml)? Thanks.

    asked by Carol
  5. physics repost bobpursley

    The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what? Responses * physics -

    asked by jane
  6. Physics

    A 61 kg skier on level snow coasts 184 m to stop from a speed of 12.0 m/s (A) use the work energy principle to find the coefficient of kinetic friction between the skis and the snow. B) suppose a 75 kg skier with twice the starting speed coasted the same

    asked by Sarah
  7. Calculus

    A Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of the rectangle. What is the area of the largest possible Norman window with a perimeter of 22 feet?

    asked by Z32
  8. Physics

    A 1200 kg car is moving on the freeway at 65 mph. (A) find the magnitude of its momentum and its kinetic energy in SI units. (b) if a 2400 kg SUV has the same speed asthe 1200 kg car, how much momentum and kinetic energy does it have?

    asked by Sarah
  9. Calculus

    A cylinder is inscribed in a right circular cone of height 8 and radius (at the base) equal to 2. What are the dimensions of such a cylinder which has maximum volume? Radius? Height?

    asked by Z32
  10. organic.chem

    Compound X, C8H17Cl, is a chiral product of the radical chlorination of 4-methylheptane. X reacts in SN2 fashion with NaI in acetone to form Z, C8H17I. When the reactant is the R-enantiomer of X, only the R-enantiomer of Z is formed. What is the structural

    asked by melvin
  11. Algebra

    Suppose a farmer has 120 feet of fencing to make a rectangular barnyard enclosure. If the enclosure is x feet long, express the area A of the enclosure as a function of the length x.

    asked by Angie
  12. Math

    The question is this: You know that a number is divisible by 6 if it is divisible by both 3 and 2. So why isn't a number divisible by 8 if it is divisible by both 4 and 2? My answer is this: The only prime factors of 6 are 2 and 3. So, if a number is

    asked by B.B.
  13. Calculus

    A rancher wants to fence in an area of 5189400 square feet in a rectangular field and then divide it in half with a fence down the middle parallel to one side. What is the shortest length of fence that the rancher can use?

    asked by Z32
  14. Calculus

    If 6075 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box. Volume=??? cubic cm

    asked by Z32
  15. 8math

    What are the odds in favour for this event? getting a perfect square when two number cubes labelled 1 to 6 are rolled and the numbers are multiplied. i don't understand how to do this. please help. thank u :)

    asked by rebecca
  16. Calculus

    The manager of a large apartment complex knows from experience that 90 units will be occupied if the rent is 370 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 5 dollar increase in rent.

    asked by Z32
  17. Calculus

    A fence 5 feet tall runs parallel to a tall building at a distance of 7 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? [Hint: Determine the length of a ladder

    asked by Z32
  18. Mircoeconomics

    A significant difference between monopoly and perfect competition is that: A. free entry and exit is possible in a monopolized industry but impossible in a competitive industry. B. competitive firms control market supply but monopolies do not. C. the

    asked by Nick
  19. Finance. PLEASE HELP ME

    1) growth rates The stock price of the company is $76 investors require a 14% rate of return on similar stocks If the company plans to pay a dividend of $5.00 next year the expected growth rate of the company's stock price is ______ percent 2) non constant

    asked by Heidi
  20. Physics

    a fun loving 11.4kg otter slides up a hill and then back down to the same place. If she starts up at 5.75 m/s and returns at 3.75 m/s, how much mechanical energy did she lose on the hill and what happened to that energy

    asked by Sarah
  21. history

    how were the truman doctrine and the marshall plan relevant to the american foreign policy goal of containment?

    asked by y912f
  22. Statistics

    In a blood clinic, each donor is asked to write on a piece of paper if they are HIV positive or not. To maintain privacy, before the donor writes on the paper, he throws a six-sided dice. If the dice is 6, then he is supposed to write “HIV Positive”

    asked by Razor
  23. Algebra

    Simplify: Write answers in the form of a + bi, where a and b are real numbers. a. (1-2i)(1+3i) b. (3-5i)(8-2i)

    asked by Breanna
  24. math 209

    Area of a sail. The area in square meters for a triangle is given by A(x)=x^2 +5x +6. a.) Find A(5) b) if the height of the sail is x+3 meters, then what is the length of the base of the sail when area is x^2 +5x+6m^2?

    asked by trina
  25. Medical Coding

    What is the two subheadings within the Cardiovascular System subsection?

    asked by Michelle
  26. catering

    Which of the following is the fermenting agent that converts the wort into beer?

    asked by newkid
  27. Math

    I do not understand this problem can somebody please help me with it? Fill in the missing digits in as many ways as possible so the number will be divisible by 6. 3 _ 2 _ Thanks for the help.

    asked by B.B.
  28. Calculus

    A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y=2-x^2 What are the dimensions of such a rectangle with the greatest possible area? Width=? Height=?

    asked by Z32
  29. linear programing.

    The cheesy company produces two types of cheese with extra sharp cheddar cheese. The cheese spreads are packaged in 120 ounce containers, which are then sold to distributors throughout northeast. The regular blend contains 80% mild cheddar and 20% extra

    asked by cocobunniesfromhell
  30. organic chem

    A student's correctly calculated value for the percent recovery of the purified unknown solid in a recrystallization experiment was 102%. Assume that the student performed all steps of the procedure correctly a) comment of the validity of this result;

    asked by Laura
  31. accounting

    Can someone please tell me how to set these problems up? I am confused! Lear, Inc., has $800,000 in current assets, $350,000 of which are considered permanent current assets. In addition, the firm has $600,000 invested in fixed assets. a.) Lear wishes to

    asked by Angel
  32. college

    imhaving a little bit of trouble starting my reaserch paper and a thesis on kiddnaping can i get an example

    asked by Rosemary
  33. geometry

    how can we prove that an exterior angle of a triangle has measure equal to the sum of the measures of the 2 interior angles remote from it

    asked by Laura
  34. algebra help

    Factor completely 4v^2+1-4v =____ another problem is factor completely 4s^2-81= ____

    asked by shelly
  35. Business

    If you were to purchase stock, what sort of information about the company’s stock would you use to make your decision to buy shares of a certain company?

    asked by Linda
  36. math

    You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2 to power 2 3 to power 3

    asked by thomas
  37. Science

    How do the properties of methane relate to its molecular structure?

    asked by Kelly
  38. medical billing and coding from Penn Foster

    When writing a research paper and writing a reference page, should you include in the paper that you are writing the refence number after the sentence, or can you just list the references on a separate sheet of paper and call it done?

    asked by Shannon
  39. ChECK Homework English

    Homework I Pg.108 (Ex.1)Choose the verb that agrees with its subject according to the conventations for academic and professional writing. 1. There are at least two good reasons for changing motor oil: risk of contamination and danger of addictive

    asked by Cathy
  40. bibliography

    i am doing the reaserch paper on one of my uncles who disapeared if i found information of him on a website how would the bliography would be done and i also interviwed some family

    asked by Rosemary
  41. medical billing and coding from Penn Foster

    I was wondering if someone coould look at this report and let me if you think it is ok to hand in. The questions are: Does HIPAA affect the patient's access to his/her medical record?if so describe the effect and procedure to obtain access 2)under what 12

    asked by Shannon
  42. Algebra

    How can algebra be used to solve this problem? The boy solved 10 problems correctly at 8 cents a problem for a total of 80 cents, and 16 incorrectly at the cost of 5 cents for a total of 80 cents. Therefore, neither the boy nor his father owed each other

    asked by Kate
  43. Algebra

    Please Find the difference quotient f(x+h)-fx/h for f(x)= 4x-9 and simplify

    asked by Bonnie
  44. Grades

    I need some help on calculating my current high school GPA. So far, I've completed 8 classes per year (I'm a sophomore, soon to be junior), making that 16 classes total. I also took two middle school classes that count for high school credit. Here's the

    asked by Anonymous
  45. math

    What characteristic do the numbers 8, 10, 15, 26, and 33 have that the numbers 5, 9, 16, 18, and 24 don’t have? (Hint: List the factors of the numbers.) Give two more numbers that have this characteristic.

    asked by jessica
  46. college

    : Identify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix C. How did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth

    asked by Anonymous
  47. music

    how can i do better at the flute and piano?

    asked by divya
  48. social studies

    i need info for a project of something called boston massacre

    asked by iris
  49. Literature

    Can someone tell me if my statement below is correct? I have to write a paper on The Lottery comparing and constrasting the theme and style. I am not sure if my themes and styles are correct or if I have them mixed up. I have trouble with picking out the

    asked by Tim
  50. infinite mathematic

    Section 6.8: Table1: Customer# Random# Time req. Teller Start time End Time 1 10 8 A 9:00 9:08 2 7 5 B 9:00 9:05 3 2 3 C 9:00 9:03 4 3 3 C 9:03 9:06 5 1 3 B 9:05 9:08 6 6 5 C 9:06 9:11 7 4 3 A 9:08 9:11 8 3 3 B 9:08 9:11 9 1 3 A 9:11 9:14 10 10 8 B 9:11

    asked by ty
  51. SAT

    Is a 480 for math bad? Would the 660 I got on reading componsate for this?

    asked by Andrew
  52. math

    You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2 to power 2 3 to power 3

    asked by thomas
  53. math

    Find the LCM of the numbers 24 and 32 by using a. the listing multiples method.

    asked by thomas
  54. Calculus

    Find the point on the line -5sx+y+3=0 which is the closest to the point (2, 5) (___,___)

    asked by Z32
  55. Editing of Yr 6 exposition

    One of te most common issues that as been endlessly open to debate is relative to ..... "junkfood". Banned of unlimited is the question that I have prepared to discuss in this short easy article including its pros and cons. Whether the sale of junkfood

    asked by Perplexepenny,O
  56. science

    i need to make a p.h indicator in sience but i cant think of any other than.. tea bags, some sort of juice and.. red cabbage anyone got any sujestions?

    asked by sophie
  57. Advanced Mathematics

    verify that cos(90+A)=-sinA is an identity.

    asked by lily
  58. Business

    Why is a company concerned about its stock price in the secondary market?

    asked by Linda
  59. Health

    Who is responsible for paying $250 major medical insurance before a company assumes liability?

    asked by Lauren
  60. acc 260

    Philosophical Approaches to ethical decision making matrix

    asked by unknown
  61. science

    what does "microscopic" mean?

    asked by iormares
  62. Math

    I have a question that I answered and I'm not sure that it is right. Here is my question: Use a calculator to help you write the prime factorization of 51,051. Here is my answer: If the sum of the digits of the number is divisible by 3, then 3 is a factor

    asked by B.B.
  63. Algebra

    Let f (x) = x^2 – 3x + 8 and g(x) = x – 5. Find the sum (f + g) (x) and simplify the results.

    asked by Gertrude
  64. math 209

    Selling shirts. If a vendor charges p dollars each for rugby shirts, then he expects to sell 2000  100p shirts at a tournament. a) Find a polynomial R(p) that represents the total revenue when the shirts are p dollars each. b) Find R(5), R(10), and R(20).

    asked by jericia
  65. math 209

    Swimming space. The length of a rectangular swimming pool is 2x  1 meters, and the width is x  2 meters. Write a polynomial A(x) that represents the area. Find A(5).

    asked by jericia
  66. elementry math

    Find the LCM of the numbers 24 and 32 by using the prime factorization method.

    asked by thomas
  67. elementry math

    The product of two numbers is 180. The LCM of the two numbers is 60. What is the GCF of the numbers? Explain how you know.

    asked by chandice
  68. math

    You know that a number is divisible by 6 if it is divisible by both 3 and 2. So why isn’t a number divisible by 8 if it is divisible by both 4 and 2?

    asked by chandice
  69. math

    Do you think that the formula where n is a whole number, will produce a prime number more than 50% of the time? Give evidence to support your conclusion.

    asked by jessica
  70. crt/205

    Controlling Irrational Fears After 9/11* We present this selection as an example of a fairly well-reasoned argumentative essay. There is more here than arguments—there’s some window dressing and you’ll probably find some slanters here and there as

    asked by jim
  71. Managerial economics

    Which one is the best answer A !@#$%^&-for-tat strategy may be implemented: a. as an attempt to cheat cooperating members of an oligopoly b. as an attempt to acquire market dominance and become a monopolist c. as a punishment strategy for cheating d. a and

    asked by Linda
  72. Managerial Economics

    Which one is the best answer 1.Agreeing to be part of a price-fixing cartel is: a.unlikely to yield maximum prices or profits for very long time b.difficult to maintain, but almost guaranteed to ensure maximum profit c.illegal in most countries d.a and b

    asked by Linda
  73. science

    does anyone know if, orange juice is a pH indicator??

    asked by sophie
  74. Calculus

    Can someone prove (informally) the following theory: If there is a differentiable function, f, that is represented by a Taylor series, T, then the convergence interval for series T is identical to the convergence interval for the term-by-term derivative

    asked by Sean
  75. HCA/270

    what are the rules of thumb?

    asked by TP
  76. 5th grade

    least of possible numberthat rounds to 510

    asked by jm
  77. Cooking

    what is a simple recipe to bake brownies thanks:-D

    asked by Elina
  78. statistics

    There are four entrances to Govt center. The building supervisor wants to know if entrances are equalized. To investigate, 400 people were seen entering the center. The number using each entrances is below. At the .01 significance level is there a

    asked by elm