Questions Asked on
December 15, 2007

  1. Physics-help please!

    You decide to use your body as a Carnot heat engine. The operating gas is in a tube with one end in your mouth (where the temperature is 37.0 C) and the other end at the surface of your skin, at 30.0 C. What is the maximum efficiency of such a heat engine?

    asked by Christina
  2. Physics

    The Wall of Death in an amusement park is comprised of a vertical cylinder that can spin around the vertical axis. Riders stand against the wall of the spinning cylinder and the floor falls away leaving the riders held up by friction. The radius of the

    asked by Lindsay
  3. statistics

    7) (8 pts) Construct a histogram and a frequency polygon for the following frequency distribution Miles Miles Number of Commuters Class Frequency 0 - 24 4 25 - 49 10 50 - 74 11 75 - 99 5 100 –124 1

    asked by Rose
  4. statistics

    11. (4 pts) The following statistics provide information about the scores on a national mathematics exam. Mean 312 First Quartile 201 Median 296 Third Quartile 423 Mode 326 49th Percentile 307 a) What score did half of the test takers surpass? b) What was

    asked by Rose
  5. spanish

    hey i'm having a bit of trouble with spanish. Any help with differentiation the two would be great. hace + period of time + que + present tense AND hacía + period of time + que + imperfect tense. I have my spanish book with me, and it tells me the

    asked by Krissy
  6. chemistry

    Why doesn't the hydrogen produced in the Lithium/water reaction catch fire?

    asked by Rebecca
  7. art

    what art movement is william morris associated with

    asked by hannah
  8. sra McGuin HELP PLEASE

    Como hacer un batido de fresas y kiwis 1. Primero, necesitas tener una licuadora, cinco kiwis, seis fresas, jugo de nuranjo, hielo, un cuchillo, y unos vasos. 2. Despues, corta las fresas 3. Ahora corta en rodajas los kiwis en el medio y saca afuera los

    asked by sam
  9. spanish sra Mcguin

    where do i put in distribuye thanks

    asked by sam
  10. science fair project

    what would happen if i left a sunflower in a place with only a little bit of sun what would happen would it stretch or just die from the little sunlight

    asked by tiffany jasper
  11. Physics

    Three very small spheres are located along a straight line in space far away from everything else. The first one (with a mass of 2.43 kg) is at a point between the other two, 10.60 cm to the right of the second one (with a mass of 5.17 kg), and 20.70 cm to

    asked by Lindsay
  12. sra mcgin

    are you on the site this morning sam

    asked by sam
  13. is this correct spanish

    Finalmente, les distribuye los vasos a los invitados. is this correct now???

    asked by sam
  14. sci 275

    propose a hypothesis to explain how limbless salamanders evoled according to Darwin's theory of natural selection

    asked by anaya
  15. sra JMcGin

    Como hacer un batido de fresas y kiwis Please help me put in the accents and any changes - we are going ot kinkos in 5 mins thanks 1. Primero, necesitas tener una licuadora, cinco kiwis, seis fresas, jugo de nuranjo, hielo, un cuchillo, y unos vasos. 2.

    asked by sam
  16. spanish

    is this correct is there something wrong with spoon Como hacer un batido de fresas y kiwis 1. Primero, necesitas tener una licuadora, cinco kiwis, seis fresas, jugo de nuranjo, hielo, un cuchillo, y unos vasos. 2. Después corta las fresas 3. Ahora corta

    asked by sam
  17. Physics Questions!

    An interference pattern is set up by two point sources of the same frequency, vibrating in phase with one another. A point on the second nodal line is 50.0 cm from one source and 59 cm from the other. The speed of the waves is 35 cm/s. Calculate the

    asked by URGENT
  18. Physics

    My last problem for the day: A) The centers of two 11.00 kg spheres are separated by 0.09 m. What is their gravitational attraction? I got 9.96 x 10^-7 N. B) What is the ratio of this attraction to the weight of one of the spheres (at the surface of the

    asked by Lindsay
  19. hum 130

    Considering that Hinduism lacks a uniting beleif system, what makes up the Hindu religion?

    asked by anaya
  20. hum 130

    What are the cultural and societal influences that have made Hinduism vital to the region in which it orginated?

    asked by anaya
  21. hum 130

    Explain the desire for liberation from earthly existence.

    asked by anaya
  22. Physics

    Someone has already posted this question, but their's was never answered, so hopefully someone can answer this. Thanks. An interference pattern is set up by two point sources of the same frequency, vibrating in phase with one another. A point on the second

    asked by Needs Physics help desperately
  23. Pigskin Geography

    Who knows numbers 1-5 on week 15?

    asked by Aleysha Keys
  24. math

    suppose the graph of f is given . Describe how the graph of the function can be obtained from the graph of f . Y = 4f ( x + 5 )- 3 . How would I work this problem?

    asked by 758
  25. sra JMcGin spanish

    is this good? this is my final copy Como hacer un batido de fresas y kiwis 1. Primero, necesitas tener una licuadora, cinco kiwis, seis fresas, jugo de naranja, hielo, un cuchillo, cuchara y unos vasos. 2. Después corta las fresas 3. Ahora corta en

    asked by sam
  26. Public Administration

    Hi, I would like some assistance with this question. I am stuck between answers C and D. Both appear correct to me. D because I know Strategic Management is about attaining ALL of your objectives Strategic Management is about A. Attaining part of your

    asked by Keith
  27. Public Administration

    Which of the following is an alternative to the bureaucratic paradigm? A. An organization is defined by the resources it controls B> An organization sticks to routine and focuses on its own needs C. An organization empowers front line employees D. An

    asked by Keith
  28. Public Administration

    I believe I have the correct answer for this one, but just want to make sure. According to theories of French and Raven, Martin Luther King Jr exemplified which style of power in his leadership of the civil rights movement? A. Referent power B. Coercive

    asked by Keith
  29. Math- Truth Tables

    Construct a Truth Table for the given statement: 1. p implies ~(pVq) 2. ~(p AND q)Vp I thought this is how to do it, but my teacher marked it incorrect: 1. p q ~(pVq) p implies ~(pVq) T T F T implies T= T T F F T implies F= F F T F F implies F= T F F T F

    asked by Joseph
  30. Math- Truth Tables

    Construct a Truth Table for the given statement: 1. p implies ~(pVq) 2. ~(p AND q)Vp I thought this is how to do it, but my teacher marked it incorrect: 1. p q ~(pVq) p implies ~(pVq) T T F T implies T= T T F F T implies F= F F T F F implies F= T F F T F

    asked by Joseph
  31. math

    If a ball is thrown directly upward with a velocity of 80ft/s, its height (in feet) after t seconds is given by y=80t-16t^2. What is the maximum height attained by the ball?

    asked by lucy
  32. algebra 2

    Evaluate the expression (40/2+i) + (35/2-i). What steps do I take in order to find this answer?

    asked by Louie
  33. Calculus

    Find the volume of the solid whose base is the region in the xy-plane bounded by the given curves and whose cross-sections perpendicular to the x-axis are (a) squares, (b) semicircles, and (c) equilater triangles. y=x^2, x=0, x=2, y=0 I know how to graph

    asked by Anonymous
  34. Maths

    Can some one check this for me..please... The customer wishes to buy a carpet 12.5 sq metres. The cost $C of supply and fitting the carpet has a price of $p per square metre and is given by the formula C= 75 + 12.5P Rearrange this formula to make P the

    asked by Zippy
  35. ged math

    Using estimating.$195 of erin's $1190 monthly check goes for a car payment. What percent of Erin's check is used for this payment?

    asked by toya
  36. chemistry

    the formula for propene reacts with water using potassium permanganate as a catalyst

    asked by Renee
  37. math

    how do u find probability?

    asked by alli
  38. WWII

    When Hitler violated tha agreements of the Munich Agreement, what was he aiming for? What was he planning on gaining when he violated those terms?

    asked by Lena
  39. math

    Find the domain and range of the function f(x)=x^2-12x+2

    asked by Celia
  40. english

    Can someone explain to me the different appeals used in writing (ethos, pathos, and logos)?

    asked by Kim
  41. Caesar

    Hi! I have a packet to do on Caesar and I can't find some of the answers. Does anyone know how Cassius and Brutus are related? Thanks!

    asked by Jen
  42. not exactly school-related

    What are some safe kids web search engines?

    asked by Anonymous
  43. persuasive paper

    when writing a persuasive paper, is it okay to make two points in one paragraph?

    asked by Jessica
  44. Math

    Construct a Truth Table for the given statement: 1. p implies ~(pVq) 2. ~(p AND q)Vp I thought this is how to do it, but my teacher marked it incorrect: 1. p q ~(pVq) p implies ~(pVq) T T F T implies T= T T F F T implies F= F F T F F implies F= T F F T F

    asked by Joseph
  45. Math

    Construct a Truth Table for the given statement: 1. p implies ~(pVq) 2. ~(p AND q)Vp

    asked by Joseph
  46. WWII

    I know that there is not just one answer for this question but in your personal view, what did most countires plan to acheive after WWII? What was the main goal?

    asked by Lena
  47. physics

    Three very small spheres are located along a straight line in space far away from everything else. The first one (with a mass of 2.59 kg) is at a point between the other two, 10.50 cm to the right of the second one (with a mass of 5.03 kg), and 20.40 cm to

    asked by rory
  48. persuasive paper (again)

    I'm having trouble with an introduction. What is the correct way to write an intro and good ways for a leading sentance? please and thanks

    asked by jessica
  49. WWII - editing

    Im writing a diary entry for the events leading up to WWII. Could someone please edit it. I'm not sure if my information is 100% correct. September 12th 1939 Great Britain had declared war on Germany on September 3rd subsequent to Germany’s invasion into

    asked by Lena
  50. math

    is 2/3 closer to 0.67 or 0.667?explain

    asked by lucely
  51. geometry

    a star, is it a polygon? if it is name it by the num,ber of sides... 10 sides i beilieve?

    asked by ceilia
  52. geometry

    4 sides a polygon?

    asked by ceilia
  53. WWII

    The 1st group of Candians that were sent over sea to ritian were sent in December of 1939. Where were they sent in Canada to prepare for WWII?

    asked by Lena
  54. Film Studies Essay

    Hi, I am writing a paper about queer spectatorship in the movie The Wizard of Oz. I have to write a critical analysis five page essay. *I want to know if my thesis statement clearly communicates my argument and its significance, and my method and tools of

    asked by Kelley
  55. Composition

    What will be the best way to start an introduction paragraph when writing a comparison paper, such as comparing adults to adolescents without comparing their age differences.

    asked by Rd
  56. Algebra II

    In an induction proof of the statement 4+7+10+...+(3n-1)=n(3n+5)/2 the first step is to show that the statement is true for some integers n. Note:3(1)+1=1[3(1)+5]/2 is true. Select the steps required to complete the proof. A)Show that the statement is true

    asked by Jon
  57. science

    what speeds up chemical reactions in a cell

    asked by spanky
  58. Composition

    Would it be appropriate to start an introductory comparison paragraph with THE MAJOR DIFFERENCES WITH SINGLE PARENTS AND MARRIED COUPLES IN PARENTING ARE .........

    asked by Rd
  59. algebra

    f(x)=x2(squared)-7x+10, find (a)f(0), (b) f(5), and (c) f(-2)

    asked by BB
  60. Composition

    I can not think of any major differences between adults and adolescents. Could I get any suggestions on starting a paper on some differences?

    asked by Rd
  61. statistics

    3) (2 pts) Half of the numbers in any data set will be larger than the A) mean B) mode C) median D) midrange

    asked by Rose
  62. algebra

    -3x+4y=11

    asked by BB
  63. algebra

    f(x)=-2x-5

    asked by BB
  64. algebra

    Is this right if I substitute -2 for x? f(x)=x^2-7x=10 f(-2)=-2^2-7(-2)+10 f)-2)=-4-(-14)+10 f(-2)=-8

    asked by BB
  65. Can someone check my answer please

    Can someone check this for me? Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is graphed on a rectangular coordinate system where time is on the horizontal axis. Suppose that the number of cars driven on 1st

    asked by Cupcake
  66. math

    There are 9 more quarter then dimes.if the total value of the coins is 6.8, how ,any quarters are there?

    asked by jonathan
  67. Chemistry

    What effect does diluting the sodium hydroxide have on the basicity of the solution?

    asked by Dick Rogers
  68. Algebra 2

    an ice cream store has 31 flavors of ice cream and 10 toppings. A regular sundae has one flavor of ice cream, one topping, and comes with or without whipped cream. How many different ice cream sundaes can be ordered? I'm thinking 310 but how do i figure it

    asked by Jon
  69. Chemistry

    Can someone check these answers for me THANK YOU! 1) Which of the following combinations would most increase the solubility of a gas in a liquid? is it increase the pressure and increase the temperature 2) The concepts of molarity and molality are like in

    asked by anonymous
  70. math

    an apple cost 20 cent and a orange cost 25cent. if the total number of apples and oranges is 20 and the total cost is 4.55, how many oranges are there?

    asked by jonathan
  71. math analysis

    how would I simplify: -3i^4

    asked by greg
  72. Math Analysis

    Which is equivalent to 6-i/2i

    asked by jon
  73. Math Analysis

    Which is equivalent to 5+i/1+3i

    asked by jon
  74. Math Analysis

    How would I solve: x-1/x+2 is greater than or equal to x/x-2

    asked by jon
  75. Math Analysis

    How would I simplify: i^57

    asked by jon
  76. Math Analysis

    How do I solve: 4x^3 is less than x

    asked by jon
  77. math

    there are 50 question in a test. a student gains 2 marks for a correct anwser and loses 1 mark otherwise. if a student has 76 marks, how many question did he answer incorrectly?

    asked by jonathan
  78. math

    Tom is now 25 years older then his son. In 10 years, Tom will me 5 years younger than 3 times his sons age. how old is tome now?

    asked by jonathan
  79. Math Analysis

    How would I solve: x^4=81

    asked by jon
  80. Physics

    A 4610 kg helicopter accelerated upwards at 2 m/s^2. What lift force is exerted by the air on the propellers? I was given this reply: The air force on the prop blades is what accelerates the helicopter upward. Use good old Newton's second law: F = M a

    asked by Einstein
  81. Math Analysis

    When simplifing 1/a-3 - 1/3-a do I procede by multi. by the recipercal or would I just set them equal to each other.

    asked by Greg
  82. Physics

    A constant net force of 406 N, up, is applied to a stone that weighs 33 N. The upward force is applied through a distance of 2.4 m, and the stone is then released. To what height, from the point of release, will the stone rise? I was given this reply: The

    asked by Einstein
  83. PLEASE READ

    ATTENTION TEACHERS AND HELPERS I Am THE REAL Jon I'm not changing my name to greg,jonathan or anything else whenever you see Jon,not jon its me I always give my best answer. I don't just ask questions waiting for someone to give me the answer. Thanks and

    asked by Jon
  84. Double Major / Major + Minor in University

    What's the difference between double majoring and a major + minor in a program? Do employers look at it? Is it "better" to double major than to major and minor in a program?

    asked by Anonymous
  85. Calculus

    Find the volume of the solid whose base is the region in the xy-plane bounded by the given curves and whose cross-sections perpendicular to the x-axis are (a) squares, (b) semicircles, and (c) equilateral triangles. for y=x^2, x=0, and y=0 (a) integral

    asked by Anonymous