Questions Asked on
December 2, 2007

  1. physics

    A refrigerator has a coefficient of performance of 2.25, runs on an input of 95 W of electrical power, and keeps its inside compartment at 5 degrees celsius. IF you put a dozen 1.0 L plastic bottles of water at 31 degrees celsius in the refrigerator, how

    asked by Jen
  2. physics

    A Carnot engine is operated between two heat reservoirs at temperatures 520 K and 300 K. (a) If the engine receives 6.45 kJ of heat energy from the reservoir at 520 K in each cycle, how many joules per cycle does it reject to the reservoir at 300 K? (b)

    asked by Jen
  3. physics

    A refrigerator has a coefficient of performance of 2.25, runs on an input of 95 W of electrical power, and keeps its inside compartment at 5 degrees celsius. IF you put a dozen 1.0 L plastic bottles of water at 31 degrees celsius in the refrigerator, how

    asked by Jen
  4. chem

    A 1.00 L flask containing 450 torr of H2 is connected to and mixed with a second flask with a volume of 0.500 L containing 250 torr N2. What is the final pressure of the resulting mixed gas system? a) 250 torr b)383 torr c) 450 torr d) 575 torr e) it

    asked by Matt
  5. physics

    A Carnot engine is operated between two heat reservoirs at temperatures 520 K and 300 K. (a) If the engine receives 6.45 kJ of heat energy from the reservoir at 520 K in each cycle, how many joules per cycle does it reject to the reservoir at 300 K? (b)

    asked by Jen
  6. calculus

    A baseball pitcher throws a baseball with an initial velocity of 133 feet per second at an angle of 20° to the hoizontal. The ball leaves the pitcher's hand at a height of 5 feet. Find parametric equations that descrive the motion of the ball as a

    asked by john
  7. science(chem)

    I did a dehydration rxn with 1.424g of 4-methylcyclohexanol with .40ml 85% H3PO4 and 6 drops of concentrated H2SO4. I have to calculate the limiting reagent even though I do suspect it to be the 4-methylcyclohexanol. I do know the ratio is 1mol H3PO4: 3mol

    asked by ~christina~
  8. Algebra

    Can someone check my answers? 1. Write the equation of the line that passes through point (–2, 3) with a slope of –4. Answer: y = -4x - 5 2. Find the slope and y-intercept. x = –8 Answer: Slope: undefined; y-intercept: none 3. Write the equation of

    asked by Shirley
  9. Chemistry

    Write the net ionic equation for the reaction between sulfuric acid and potassium hydroxide. I got 2H^+ + 2OH^-1 ==> 2H2O. Is this correct?? Thanks.

    asked by Lucy
  10. Chemistry

    why do some combinations of ionic compounds form a precipitation while others do not

    asked by Jenna
  11. physics help please :)

    From a height of 35.0 m, a 1.25 kg bird dives (from rest) into a small fish tank containing 50.0 kg of water. What is the maximum rise in temperature of the water if the bird gives it all of its mechanical energy? (delta)T= ?? degrees C

    asked by Christina
  12. chem

    Consider the following cyclic process carried out in two steps on a gas. Step 1: 48 J of heat is added to the gas, and 20. J of expansion work is performed. Step 2: 70. J of heat is removed from the gas as the gas is compressed back to the initial state.

    asked by mel
  13. Math Quantitive Reasoning

    The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $12. What percentage of her phone bills are between $14 and $86?

    asked by Lindsey
  14. physical science

    If the absolute pressure of a gas is 550.280 kPa, its gage pressure is A. 101.325 KPa B. 277.280 KPa C. 448.955 KPa D. 651.605 Kpa

    asked by Josh
  15. area of a rectangle, i think?

    Okay, so Spot the dog is on a 10 foot leash. The leash is attatched to the CENTER of a 24ft by 8ft rectangular shed. So basically, imagine a 24 by 8 rectangle, with a leash attatched to the CENTER of the 24in side. K? - I NEED TO ANSWER THESE 2 QUESTIONS

    asked by sarah
  16. physics

    A satellite has a mass of 5850kg and is in a circular orbit 4.1*10^5m above the surface of a planet. The period of the orbit is two hours. the radius of the planet is 4.15*10^6m.What is the true weight of the satellite when it is at rest on the planet's

    asked by ajo
  17. Religion/English

    so there's this poem.. God's Grandeur: The world is charged with the grandeur of God. It will falme out, like shinning from shook foil; It father to a greatness, like ooze of oil Crushed. Why do men then now not reck his rod? Generations have trod, have

    asked by helpmeplease
  18. please check it Writeteacher

    Sorry I meant gustatory imagery but how is the rest of the essay thanks

    asked by Ace
  19. chem

    A balloon is filled with He to a pressure of 1.06 atm. The volume of the balloon at 25oC is 1.30 x 104 L. How many cylinders of He gas are needed to fill the balloon if the pressure in the cylinder at 20oC is 98.5 atm and the volume of the cylinder is 40.0

    asked by Corey
  20. chemical test

    I'm going to do the Baeyer test (Pottasium permanganate) Instructions say to disslove 25mg of unknown or 2 drops of liquid unknown in 2ml of 95% ethanol. Slowly add 1% aqueous solution (weight/volume) of potassium permanganate, drop by drop with shaking,

    asked by ~christina~
  21. Topics For A Ballad

    Does anyone have any ideas for a funny topic for a ballad? Thanks in advance :)

    asked by Tina
  22. Physics

    A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic frictions are 0.23 and 0.12 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the

    asked by Lindsay
  23. Chemistry

    I have no idea how to work this problem can anyone help explain this to me? 2H2O=2H2+O2 if 30mL of hydrogen are produced in the reaction above, how many militers of oxygen are produced?

    asked by Ryan
  24. english

    nevertheless,as a nation we are being more and more concerned with housing that does far mjore than support physical survival. if you rewrote sentence 7 beginning with housing that does far more than support physical survival the next words would be:

    asked by JESSICA
  25. physics

    Conventional engines ignite their fuel by using the spark from the spark plug. But in a diesel engine, the air enthers the chamber at the temperature of the atmosphere and is compressed by the piston until it reaches 550 degrees Celsius, at which time the

    asked by Jen
  26. SCI 275

    I can not find anything these: any opposition to water pollution. proposes other water or land problems that might occur from water pollution challenges,limitations, or implications of the plan. provides how the plan affects the community in terms of jobs,

    asked by dawn
  27. works cited page

    I am doing a works cited page in MLA format. If I have two articles that are from the same website, just different places, do I document it as one source or two different ones?

    asked by Mischa
  28. lab equipment (chem)

    Why is it that in particular experiments they say to use a Hirsch funnel while we have both the Hirch funnel and the buchner funnel at our disposal. In my opinion I prefer to use the buchner funnel to using the Hirch funnel because product gets stuck in

    asked by ~christina~
  29. Math

    A census taker came back to a house where a man lived with his three children. The census taker asked, "What is your house number?" The man replied, "The product of my children's ages is 72 and the sum of their ages is my house number." "But that's not

    asked by Anonymous
  30. Physics

    Conventional engines ignite their fuel by using the spark from the spark plug. But in a diesel engine, the air enthers the chamber at the temperature of the atmosphere and is compressed by the piston until it reaches 550 degrees Celsius, at which time the

    asked by Jen
  31. Chemistry

    Kirsten is in her lab, and reacts two unknown gases (A(g) and B(g)) to get nitrogen dioxide (NO2). Using her data, she is able to write the following balanced equation: 2A(g) + B(g) --> 2NO2(g) If she started with 8 L of A(g) and 3 L of B(g), how many

    asked by Grant
  32. Math: Factoring

    I'm having a hard time factoring polynomials, especially 3rd degree. -x^3+2x^2+4x-8 -x^3-5x^2+20x+12 I don't know how to begin. I thought long division, but what would I divide by?

    asked by Amelie
  33. pre algebra

    i am having trouble understanding how to do this math problem 4/3x=160

    asked by mykayla
  34. English

    I have The Great Gatsby test tomorrow and I'm wondering where can I find some RELEVANT short answer questions (relating to Hamlet, to society and questions about the novel itself).

    asked by Anonymous
  35. social studies

    it says write a position paper explaining how british polocies spurred the growth of representative government during the colonial trade

    asked by john
  36. Sin/Cos

    I'm having trouble with a concept. I don't understand how the answer was found. 1. Find three other angles, such that cos[beta] = cos [25]. Answers are -25, 335, -335. In my Calc class, the teacher showed it by using a circle, with an angle. Can anyone

    asked by Joey
  37. Math

    A plane that can fly 275 mph in still air for 3 hours against a wind and for 2 hours with the same wind. The total distance it covers is 1300 miles. Find the rate of the wind.

    asked by Adam
  38. math calculus

    Please explain how it is (ln 4) ¡Ò^8 2 x^-1 dx= (ln 8) ¨C (ln 2) =(ln 4)

    asked by Scott
  39. physics help please :)

    From a height of 35.0 m, a 1.25 kg bird dives (from rest) into a small fish tank containing 50.0 kg of water. What is the maximum rise in temperature of the water if the bird gives it all of its mechanical energy? (delta)T= ?? degrees C

    asked by Christina
  40. English

    Thus, the Nurse sees the purpose of the asylum as a place to be conformed is to persuade the patients to accept and function in the Outside world of rewards and punishments. How do I reword "to be conformed"? I don't like the idea of using "to be" in any

    asked by Anonymous
  41. Physics

    A railroad flatcar is loaded with crates. The coefficient of static friction between the crates and the floor is 0.27. If the train is moving at 59.7 km/hr, in how short a distance can the train be stopped with a constant acceleration without causing the

    asked by Lindsay
  42. English

    Can you check whether my first three sentences in my introduction makes sense or not? “One flew east, one flew west, one flew over the cuckoo’s nest”. This epigraph from One Flew Over the Cuckoo’s Nest, represents opposite philosophies and

    asked by Anonymous
  43. Am I correct on this question (accounting)

    The question is: which accounts normally require an adjusting entry: Choices to choose from were: Salaries payable, Land, Dana Cates Drawing, Accumulated Depreciation, Unearned Rent and Supplies. The ones that i chose for the question were: Salaries

    asked by Megan
  44. calculus

    Solve the system by the method of your choice. Identify systems with no solutions and systems with infinitely many solutions, using set notation to express their solutions: (0 ,-5) (0 , 0) (-2 ,-1) (-2,-3)

    asked by kelly
  45. Algebra

    Name the line which have the following characteristics: 1) Passes through (2,3) & (0,-9) 2) Perpendiculat to the line 4x-2x=7 and through (1,-3) 3) Perpendicular to the segments with endpoints (2,1) & (-4,-1) and through the midpoint of the segment. If

    asked by Krissy
  46. Literature

    I need help on writing an essay on the poem The Death of Santa Claus by Charles Webb

    asked by Ashley
  47. Science Fair

    What can i do for related topics in my science fair for preserveation of cucumbers

    asked by Cam
  48. US history

    identify PANIC OF 1837! please help!

    asked by estrella
  49. Chemistry

    Find the concentration of H3O if the pOH of a solution is 11.700: So far I have: pH= 14.000- pOH which is 14.000-11.700=2.300 pH = -log[H3)] -2.300 = log[H3O] Lost after that!!! Help please.

    asked by Lucy
  50. calculus

    Solve the system by the method of your choice. Identify systems with no solutions and systems with infinitely many solutions, using set notation to express their solutions: x + y = 3 -2 + y = -3 (0 ,-5) (0 , 0) (-2 ,-1) (-2,-3)

    asked by kelly
  51. history

    the president of the united states is elected by electoral college.what type of system is this? a)dictatorship b)monarchy c)oligarchy d)pure democracy e)represenative democracy

    asked by JESSICA
  52. U.S. GOVERNMENT

    i need a Civil War issue that has been present in the past 6 months in America.

    asked by I NEED HELP!!!!
  53. English

    The sweetest honey Is loathsome in his own deliciousness is this a pun?

    asked by Jennifer
  54. Help

    can someone just please find info. for me on how to get from paterson to 505 ramapo valley road Mahway,N.J because those other websites keep giving me directions to the college from N.Y and the place is in N.J!

    asked by Mack
  55. Calculus

    Problem 12. Find the derivative of the function. f(x)=e^(x)^1/2 My answer is: [e^(x)^1/2]/2x^(1/2) Is this correct?

    asked by Molly
  56. physical science

    If the absolute pressure of a gas is 550.280 kPa, its gage pressure is A. 101.325 KPa B. 277.280 KPa C. 448.955 KPa

    asked by Josh
  57. chem

    Yesterday, Jason had a sample of helium indoors (T = 23oC) in a sealed container, with a pressure of 760 mm Hg. He got bored and took the container outside, where the temperature was a blistering 35oC. He calculated the new pressure to be 750 mm Hg. Jason

    asked by Tom
  58. chem

    Suppose that Quebec had managed to succeed from Canada and became an independent country. Just to be difficult, they decreed that they will only measure pressure in mm Hg and volume in cm3. What value for R, the ideal gas constant, would students in Quebec

    asked by Matt
  59. Literature

    Book on Every day heroes. was trying to find book to have at home, teache won't let us take home. Need to do an essay.

    asked by Nick
  60. English

    The authoritarian, middle-aged woman, imposes conformity to imprison the men that she exerts power to benefit herself and not others so she can feel superior. Can you check this sentence to see if it makes sense? -- I'm saying that the woman uses her

    asked by Anonymous
  61. Bowling

    Where can I download free score-keeping sheets for bowling?

    asked by Diana
  62. Reposted: Maths - Trig

    I've been told that sin(c+h)=sin(c)xcos(h)+cos(c)xsin(h) but how? please explain

    asked by xX_Supaman_Xx
  63. math

    kim put i chair around the table .two sides of the table have 5 chairs. two sides of the table have 2 chairs. how many chairs did kim use

    asked by ceema
  64. MATH

    BACKPACKING ASLO HAS ITS BASIC FOUR,THESE BEING IN IMPORTANCE,HIKING SHOES,THE BACKPACK,SLEEPING GEAR,AND SHELTER. WHAT CORRECTION SHOULD BE MADE TO THIS SENTENCE? A)change being to are b)change its to it's c)change the colon to a semicolon d)no correction

    asked by JESSICA
  65. Communication

    What distinguishes “administrative” from “critical” approaches to the study of communication? Organize your response around representative researchers or scholars, as well as their findings, contributions or insights.

    asked by Joey
  66. french

    When someone asks me Ou travailles-tu? Is it okay to say Je ne travaille pas?

    asked by Kary
  67. Physics

    I was just wondering, since cathode ray tubes arent being made, are the only types of TVs available the plasma and the LCD?

    asked by Meredith Mcneeds Help!
  68. algebra 2

    how do u factor 5w^2-35w+60=0 if u could...can y plz explain it..i keep getting 3 ansers instead of 2

    asked by gabs
  69. english

    discuss how the methaphor of death operate in Chinua Achebe's "dead men's path" with specific reference to culture identity

    asked by sam
  70. Science

    what makes a crystal a gem?

    asked by Fawn
  71. L/S/N Government

    Why are most public official elected represent the two parties? What factors contribute to the difficulty of third party candidates being elected? Provide details and explain to support your answer.

    asked by Aminata
  72. French

    Is the verb s'appeler and appeler different? Is it correct to conjugate appeler as: J'appelle tu appelles il appelle nous appelons vous appelez ils appellent

    asked by Miche
  73. English

    Can you check if my explanation is weak, moderate or strong? Tell me why is it weak, moderate or strong. If it's weak, what can I do to improve my explanation? -- Point 2: In addition, the Nurse intimidates the patients to show how powerful she is and that

    asked by Anonymous
  74. REPOST URGENT!! PLEASE ANSWER

    I was just wondering, since cathode ray tubes arent being made, are the only types of TVs available the plasma and the LCD?

    asked by Meredith Mcneeds Help!
  75. Communication

    Can anyone help me find out what is the differnce between administrative approach and critical approach? I know that critical is oriented toward critiquing and change society as a whole. Does administrative mean using laws approach?

    asked by Joey
  76. Science

    What is an environmental problem that you feel is significant. What are some causes? Are any of these causes related to human values and environmental ethics? Explain.

    asked by Danny
  77. current events

    what is the gov't of Ecuador like currently, is it stable?

    asked by Anonymous
  78. HUM 130

    How did the childhood experiences of Siddhartha Gautama (Buddha) lead to his questioning of the spiritual practices of his time?

    asked by dawn
  79. HUM 130

    How do contemporary* Buddhist practices reflect* the foundations of the religion*?

    asked by dawn
  80. Math: determinants

    If det(A)=-7 A= | a b c | | d e f | | g h i | Find det(2A^-1), det((2A)^-1). Find | a g d | | b h e | | c i f |

    asked by Amelie
  81. s.s

    does anyone know good websites for greek art?

    asked by brittany
  82. math calculus

    Find the are under the given curve y=square root of x + 1 from x=0 to x=9 Please walk me through each step.

    asked by Scott
  83. paper

    can someone read and give their thoughts on my paer The apartheid was much like the Jim Crow laws found here in the United States, but it was much worst. In South Africa blacks had to deal with a lot of hardships that no one should have to put up with. The

    asked by sharon
  84. World History

    What does it mean to "analyze patterns of trade"?

    asked by world history help!
  85. govrenment

    what are some examples of national budget

    asked by sgdsftgfd
  86. References

    In APA citation format, there need to include Retrieved Date. What does Retrieved mean? What date should I put?

    asked by Justin
  87. Ecology help me please.

    Explain how the world would be different if C4 plants and CAM plants had not evolved.

    asked by Tina
  88. english

    what is the significance of jack london's portrayal of the man and the dog in " to build a fire" and how does it relate to naturalism?

    asked by tina
  89. English

    In addition, the Nurse uses her power of intimidation to threaten the men of indefinite incarceration. Does this sentence make sense? I'm saying that the Nurse intimidates men to stay committed in the institution.

    asked by Anonymous
  90. math

    If you make an extra $50.00 principal payment per month, what are the opportunity cost considerations?

    asked by lisa
  91. LITERATURE

    No- trees go wild at the thought. They know what they mean to do. Wild trees, gone out of your head? Do you burn to go south , you too? What figure of speech is being used here?

    asked by sam
  92. English

    illusionsgallery. com/ Rescue-of-Guinevere-Hatherell.html How does the picture above represent chivalry and how does it relate to the Arthurian Cycle?

    asked by jAcKiE
  93. LITERATURE

    Stripped of its summer wealth can the bough be wan as a root go dingy in spells of frost untrimmed of its bird its fruit? no- trees go wild at the thougt they know what they meant to do wild trees, gone out of your head do you burn to go sout too? what is

    asked by sam
  94. Math

    Station QBE played 40 minutes of uninterrupted music. Of the songs played, 2/3 were performed by female vocalists and 3/5 of these were ballads. What fraction of the uninterrupted music was ballads by female vocalists?

    asked by Kaitlyn
  95. english

    selection of hiking shoes should be your first concern.even a one day hike can be misery without comfortable shoes. the most effective combination of sentences 3and4 would include which of the following groups of words? a)concern,also even

    asked by JESSICA
  96. Communication

    Explain how signs matter in the study of communication. What are they made up of and to what do they refer? What role do “codes” play in this “science of signs?” Support your discussion with examples drawn from your perceptions and/or experience.

    asked by Joey
  97. english

    families with limited means are most interested in securing clean,safe, and reasonably comfortable housing than to find quaters that are especially psycholocially stimulating. what correction ahould be made to this sentence? a)change ths spelling of

    asked by JESSICA
  98. accounting

    the question is, Billed client 1800 for cleaning services what two entries to i have to post. im having a blank moment.

    asked by greg
  99. math

    a rectangle and a triangle have equal areas. the lenght of the rectangle is 12 inches ,and its width is 8 inches. if the base of the triangle is 32inches,what is the lenght,in inches of the altitude drawn to the base? a)12 b)16 c)6 d)8 d)9

    asked by JESSICA
  100. literature

    can you please explain the double paradox here in the last two sentences? Can we keep our heads in a world with its yankee wit so lost that the woods are a cry for fire and minding the fire is frost?

    asked by Angie