# Questions Asked onDecember 15, 2007

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?

2. ## 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

3. ## 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

4. ## 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?

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

6. ## 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

7. ## 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

8. ## 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

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

10. ## 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

11. ## persuasive paper

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

12. ## 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

13. ## 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

14. ## 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

15. ## math

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

-3x+4y=11

17. ## chemistry

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

18. ## 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?

19. ## 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?

20. ## 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?

21. ## math

how do u find probability?

22. ## 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!

23. ## 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

24. ## algebra

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

25. ## math

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

26. ## 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?

27. ## Math Analysis

How would I solve: x^4=81

28. ## 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

29. ## 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?

30. ## 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

31. ## 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

32. ## 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

33. ## hum 130

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

34. ## 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
35. ## 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

36. ## Math

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

37. ## 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

38. ## geometry

4 sides a polygon?

39. ## 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?

40. ## algebra

f(x)=-2x-5

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

42. ## math analysis

how would I simplify: -3i^4

43. ## Math Analysis

How would I simplify: i^57

44. ## chemistry

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

45. ## art

what art movement is william morris associated with

46. ## 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.

47. ## 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

48. ## Pigskin Geography

Who knows numbers 1-5 on week 15?

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

50. ## 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

51. ## algebra 2

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

52. ## 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?

53. ## 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?

54. ## english

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

55. ## not exactly school-related

What are some safe kids web search engines?

56. ## 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

57. ## 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?

58. ## 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

59. ## math

is 2/3 closer to 0.67 or 0.667?explain

60. ## geometry

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

61. ## 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.

62. ## science

what speeds up chemical reactions in a cell

63. ## Composition

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

64. ## 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?

65. ## 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

66. ## 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

67. ## Chemistry

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

68. ## 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

69. ## Math Analysis

Which is equivalent to 6-i/2i

70. ## Math Analysis

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

71. ## Math Analysis

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

72. ## Math Analysis

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

73. ## 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.

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

75. ## 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

76. ## 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

77. ## spanish sra Mcguin

where do i put in distribuye thanks

78. ## sra mcgin

are you on the site this morning sam

79. ## is this correct spanish

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

80. ## sci 275

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

81. ## hum 130

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

82. ## hum 130

Explain the desire for liberation from earthly existence.

83. ## 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