# Questions Asked onOctober 14, 2007

1. ## CHEM

Many home barbeques are fueled with propane gas C3H8. What mass of carbon dioxide (in kg) is produced upon the complete combustion of 18.9L of propane (approximate contents of one 5-gallon tank)? Assume that the density of the liquid propane in the tank is

2. ## Math

A 15 ft ladder leans against a wall. The bottom of the ladder is 3 ft from the wall at time t=0 and slides away from the wall at a rate of 3ft/sec. Find the velocity of the top of the ladder at time t=3.

3. ## physics

A box of books weighing 300N is shoved the floor of an apartment by a force of 400N exerted downward at an angle of 35.2 degrees below the horizontal. If the coefficient of kinetic friction between box and floor is .570, how long does it take to move the

4. ## Organic Chemistry

How does acetaldehyde impurity arise in the fermentation?

5. ## Social studies repost for Anonymous

Posted by Anonymous on Sunday, October 14, 2007 at 5:26pm in response to social studies. Julius was named after what part of the United States

6. ## PHYSICS REPOST

Consider a heavy rope with mass per unit length 2.10 kg/m; a length L=18.00 m of the rope is hanging vertically from a support, as shown. If the support and rope are placed in an elevator accerlerating downward with a=0.800 m/s^2, what is the tension in

7. ## grammar

would the sentence "she has been working at the hospital for 2 years" or "she had been working at the hospital for two years" which is correct?

8. ## Calculus

I have a project and part of it has to do with revenue, demand and profit. I know that Revenue=price x quantity but can profit equal price x quantity demanded? I have both written down and I am getting confused because I was supposed to find the profit but

9. ## Physics Questions

Can you please help me with some and check my answers? Thanxs! 3.Which is stronger, the electrical force between an electron and a proton or the gravitational force between these particles? -I got that the electrical force between an electron and a proton.

10. ## algebra

Superman the Escape in CAlifornia is the fastest roller coaster in the world. Riders fall 415 feet in 7 seconds. Speeds reach a maximum of 100 miles per hour. If x represents the average rate of fall of the roller coaster, write an expression to represent

11. ## Physics

Please help with these problems, I don't understand them. Thanks! Suppose the circumference of a bicycle wheel is 2 meters. If it rotates at 1 revolution per second when you are riding the bicycle, then your speed will be? Suppose you're on a Ferris wheel

12. ## Science, Biology

One parent is heterozygous and one is homozygous dominant for a gene that causes DIDS. These two parents have children (F1) The alleles for this gene are S (dominant) and s(recessive). To have this disease, the child has to be homozygous recessive (ss).

13. ## Ms. Sue HELP ASAP - history

Thank you so much but can you help me a little more??? Go Beyond voting. Heres a couple of questions we came up with to help answer the previous qestion. What are the constitutional changes that have expanded the right to vote and how did they do that???

14. ## history

what does this quote from the book "gates of Fire" mean? "The wooden door, alone will not fall"

15. ## Science repost for Tomari

science - Tomari, Sunday, October 14, 2007 at 3:26pm what element is atomic number 11 ?

16. ## Computer Science

Help me please! I need help with Floating Point Notation when converting biary and regular numbers! Please. I just need some help and would appreciate it greatly. Also instant message me at TRbal10. Thank you

17. ## Geometry

write an equation of the line in slope-intercept form containing the given point A(2,6), B(3,8)

18. ## Physics

A train slows from 25m/s to 14m/s in 5.0s. Calculate the work done on the train....so I calculted the displacement and the force and put them together to get an answer of 5.0 x 10^7J, but my textbook says it should be 1.1 x 10^7J? Am I right, or is the

19. ## Algebra 2

A rental car costs a minimum charge plus a fixed charge per mile driven. One customer was charged \$60 for 160 miles of use. Another customer drove 280 miles and paid \$90. Write an equation relating the total cost, C (in dollars), to the miles driven, x.

20. ## Calculus

Evaluate the limit, if it exists. lim (sqrt(x+2) -3)/(x-7) (x -> 7) I tried multiplying the numberator and denominator by the conjugate of the numberator (sqrt(x+2) +3) but, unless I multiplied wrong, I still ended up getting 0/0, when my calculator and

22. ## CHEMISTRY

If 142.38 g of l water at 21.7 degrees C is placed into a syrofoam cup with 174.36 g of ice at -27.5 degrees C what would be the final temperature of the entire contents at equilibrium? If it is partially frozen, how many g of the ice has melted? given

23. ## Chemistry

I'm not doing so well in ap chemistry. i think i'm not studying the right way. can anyone suggest how i can raise my grade? i do my homework but it doesn't seem to help.

24. ## Science

How do laundry detergents remove grape juice stains?

25. ## english

is runaway love by ludicris a ballad?

26. ## Physics

v(y)=v with letter y below normal line. "Explain why you can use the formula v(y)=g(t/2) to calculate the initial vertical velocity." My teacher claimed he explained the answer to this, but I didn't catch it. I would appreciate any help I get. THANKS!!!

27. ## Math- Math Analysis

In a rectangular piece of cardboard with a perimeter of 20ft, three parallel and equally spaces creases are made (so the piece is divided into four equal sections.) The cardboard is then folded to make a rectangular box with open square ends. a. Write a

28. ## S.S.

how did george vancouver learn about being a explorer?

29. ## ACCOUNTING plz help thnx

I have to prepare an adjusting entry for Dec 31, 2008 for prepaid insurance from this: An analysis of the company's insurance policies provided these facts: Policy A Purchased on April 1, 2007 for 24 month at \$11400. Policy B Purchased on April 1, 2008 for

30. ## S.S>

What were George Vancouver's goals and aspirations?

31. ## science (chem) Rf values

consider a sample that is a mixture of biphenyl, benzoic acid, and benzyl alchohol. The sample is spotted on a TLC plate and developed in a methylene chloride cyclohexane mixture. Predict the relative Rf values for the three components in the sample. For

32. ## ecconomics

why are taxes so high on cigarettes

33. ## physics repost

sorry! I never noticed..the mass should be 52000kg sorry about that!

34. ## S.S.

I'm really sorry, but do you know a website where it shows George Vancouver's timeline?

35. ## SCIENCE

i need a 14 letter word for a scientist that studies fossils....

36. ## Civics

What are some disadvantages of a democratic government?? Thanks for helping me!!!

37. ## Just a repost, in case the old isnt seen

sorry! I never noticed..the mass should be 52000kg sorry about that! For Further Reading physics repost - Alexis, Sunday, October 14, 2007 at 6:07pm so it should be a 52000kg train slows from 25 m/s to 14m/s in 5.0 s. Calculate the work done on the train.

38. ## Biology

Which solute out of protein, urea, glucose, chloride, ammonia, "substance x" cannot be filtered into the nephron? Why? I know that urea, protein, and chloride ions can be filtered. I don't know about glucose, ammonia or substance x. Is glucose found in the

Sergio bought 250 shares of Silicon Acme @ 20 through his margin account. Then the stock plummets to \$7.50 a share. Calculate the market value, debit balance, and customer equity if his brokerage firm's margin rate is set 60%. I got... market value = \$1875

40. ## economics

Will firms in a price-taker market be able to earn profits in the long run? Why or why not? What determines profitability? Discuss.

41. ## simplify

y-5=1/2(x+2)

I'm really, really, really, sorry but I seriously need help. I can't find a TIMELINE of George Vancouver's special journeys and events. PLEASE HELP ME!!! IT WILL MEAN SO MUCH TO ME!

43. ## CHEMISTRY

Why does the solvent move upward in thin layer chromatography

44. ## Geometry

This is Parallel lines and angles. The measure of angle (3x+17)? the measure of angle (4x+12)?

45. ## Biology

How do you find chi squared? and how do you find the expected values for chi squared? I understand the formula but i conducted the experiment and it doesnt give me the theoretical value of it?

46. ## Organic Chemistry

Sorry about the first posted request. The question has to do with the fermentation of ethanol from sucrose Please revisit the question and assist if possible. Thanks for your assistance. How does acetaldehyde impurity arise in the fermentation?

47. ## science

What are some problems with the lost or lack of biodiversity?

48. ## Math

What is a good slogan to remember a circle?

49. ## Math

20.A firefighter spraying water on a fire stood on the middle of a ladder. The smoke lessened, so she moved up 3 rungs . It got too htot, so she backed sown 5 rungs. later, she went up 7 rungs and stayed until the fire was out. then, she climbed the

50. ## Literature

I'm currently reading 'The Haunting of Hill House' by Shirley Jackson (and enjoying it very much). However, I am confused by a certain passage. Could anyone who has read the book explain it to me? It's near the end... "Are you two talking about me"?she

51. ## Calculus

So there is no way profit = price x quantity demanded because I have q=-60p+950 and Revenue or profit=-60p^2+950p. I then have to find out the profit made by selling things at 5.50, 10 , and 15 dollars. I was told to plug these numbers into -60p^2+950p to

52. ## accounting

List the following steps of the accounting cycle in their proper order a. Preparing the post closing trial balance b. postint the journal entries c. journalizing and posting adjusting entries d. preparing the adjusted trial balance e. journalizing and

53. ## Physics

I posted something concerning this question earlier.. and thank you for checking and letting me know of my mistake. I said that for a given velocity, the height does not depend on the mass of the ball. How could I explain this, besides the fact that when

54. ## ss

Does anyone know a website that has a good analysis on The Patriot(movie)?

55. ## science-this is urgent, plz help me! its easy too.

we did a lab on chemical change, where we had to see how a chemical change affcts mass. so we measure the mass of 20ml of copper solution, and 2cm(cubed) of steel wool, and then we mixed them into a flask. soon the steel wool turned rusy, and broke apart.

56. ## physics

when excerising using a spring you pull the spring 0.30m with a force of 365N. What distance will the spring stretch from its zero position if you applied a force of 400N?

57. ## Maaaaath

When graphing rational functions, how do I know which directions the graphs go? Example, for equation y = 9/x - x, how would you graph this? Also, why is the horizontal asymptote for f(x)= 2+x / x-7 is 1 instead of 0?

58. ## chemistry

Calculate the mass of sodium hydroxide needed to prepare 500 mL of a 0.10 M solution. I'm pretty sure the answer is 2 grams, but how do I get to that?

59. ## chemistry

Calculate the mass of sodium hydroxide needed to prepare 500 mL of a 0.10 M solution. I'm pretty sure the answer is 2 grams, but how do I get to that?

60. ## math

can someone please help me solve this problem......-3x=3/2 3/2 is a fraction. i tink the answer is -2 while my friend thinks it is -.5 who is rite?

61. ## chemistry

calculate the mass of NaOH neded to prepare 500mL of a 0.10 M solution. I'm pretty sure the answer is 2g, but how do I get to that? Another question: calculate the molar amount of KHP used to neutralize the NaOH solution. .51 g of KHP was added to 50 mL of

62. ## chemistry

calculate the mass of sodium hydroxide needed to prepare 500 mL of a 0.10 M solution.

63. ## Economics

What is the difference between less elastic and more elasic? and which is better?

64. ## SAT Math?

I'm working on a couple of SAT math programs for school, and I have trouble figuring some out. 1. Joe is 3 years younger than Kate. If n represents Nora's age now, what was Kevin's age 4 years ago, in terms of n? A. N + 7 B. N + 1 C. N - 1 D. N - 4 E. N -

65. ## Floating Point Notation

Help me please, anyone understand this topic. For example 1011 1110 in Floating Point = ? and hot to accomplish this. Please!

Explain the ethics of Jerry Maguire's business both before his revelation and after he composes what he referred to as the company mission statement

67. ## African Amer. Study

The Middle Passage Why was the mortality rate so high? Explain the term seasoning. Explain the term triangle slave routes. How long did the voyage take? (on a regular ship)

68. ## algebra

(2x^2y^-4z^-5)^3 How is the answer 8x^6 _____ y^12z^15

69. ## Maximum and Minimum

Its been awhile since I have done compleating the square, can you please help me? Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point. 19.f(x) = x2 - 2x + 1 And how

70. ## algebra

how do you get that answer???

Please check to see if my answers are correct. Complete each sentence by choosing the correct answer from the list of terms below. You will not use all of the terms. *normal good *complements *income effect *demand curve *ineleastic *inferior good *law of

72. ## algebra

how do I work this? (-4x^12y^7)^2 (2x^-3y^-2)^2 divided by (5x^-3y^10)^-1 i need step by step help

73. ## Physics

The muzzle velocity of a ball bearing was calculated through an experiment (1.22m/s). A student then wants to verify that the velocity calculated is right. So, she conducts an experiment in which she points the ball bearing launcher upwards. She measures

74. ## Physics Word Problems

Could you please explain to me these problems, I don't understand them. Do 100 J of work in 50 s and your power output is? - I got 2, but not sure of the units. A bow is drawn so that it has 40 J of potential energy. When fired, the arrow will ideally have

75. ## Physics

Will you check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s)

76. ## Algebra

Please check my answers. Find the coordinates of the vertex for the parabola defined by the given quadratic function. 1.f(x) = (x - 4)2 - 4 -I got (4,-4) Find the axis of symmetry of the parabola defined by the given quadratic function. 3.f(x) = (x + 2)2 +

77. ## physics

A 5kg bucket of water is raised from a well by rope. If the upward acceleration of the bucket is 3.0m/s^2, find the force exerted by the rope on the bucket. Work: F=(5kg)(3m/s^2) However, the answer given is .64 N.

78. ## French

Je d'accord parce que quelques gens préfèrent dormir jusqu' à l'après-midi. Quelques gens sont des couche-tard. Je ne pas d'accord parce que quelques gens plutôt feraient la fête la nuit et ils ne seront pas attentifs. Quelques gens sont des oiseaux

Please check my answers. Find the x-intercepts (if any) for the graph of the quadratic function. 1.f(x) = (x + 2)2 - 4 I got (0,0) and (-4,0) Find the y-intercept for the graph of the quadratic function. 5.y + 9 = (x + 3)2 I got (0,0) Find the domain and

80. ## physics

Can a resultant of two vectors be negative?

The distance between earth and the moon can be determined from the time it takes for a laser beam to travel from earth to a reflector on the moon and back. If the round-trip time can be measured to an accuracy of 0.19 of a nanosecond (1 ns = 10-9 s), what

82. ## Chemistry

3. What experimental problems would confront you if you attempted to determine the concentration of the metal ions in solutions of each of the following reagents? a. Cr +3 which has a maximum absorbance at 407 nm with absorbtivity of 15 M -1 cm -1 and

83. ## college class

If someone made the statements to you, How would you explain that the statements are misconceptions? Include whether you think that most Americans belive these misconceptions, why or why not? Asian Americans And PAcific Islanders are a model minority Asian

84. ## physics

A dockworker loading crates on a ship finds that a 20 kg crate, initially at rest on horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 60 N is required to keep it moving with a constant speed. Find the

85. ## history

what countries were added to prussia in 1867?

86. ## college class

What are the most significant similaritiesbetween the Chinese American and JApanese American (cultural) experiences? What are the differences? Choose from any of the following when considering similarities and Differences: Level of assimilation Relative

87. ## physics

Two objects of masses 10.0 kg and 5.00 kg are connected by a light string that passes over a frictionless pulley. The 5.00kg object lies on a smooth incline of angle 40 degrees. Find the accelerations of each object and the tension in the string. Work:

88. ## math

Rewrite the equation below in slope intercept form y = mx + b. Use fractions for the slope and the y-intercept, as needed. 4x+5y=7

89. ## math

Rewrite the given equation in slope intercept form y = mx + b. Use fractions for the slope and the y-intercept, as needed. 4/5x + 6/5y=4

90. ## math

Rewrite the equation below in general form Ax + By = C where A, B and C are the smallest integers possible and A > 0. Enter the variable expression Ax + By separately from the constant term C. y- 4/7x + 2/13

91. ## math

Find the equation of the line with the following slope and y intercept. Slope = -3, y intercept = (0, 5)

92. ## math

Find the equation of the line passing through the points (-1, 4) and (3, 2).

93. ## math

A line passes through the origin and the point (-6, 4). Write the equation of the line that passes through (-6, 4) and is perpendicular to the given line. Write the final answer in the slope-intercept form y = mx + b. (The slope and y-intercept must be

94. ## MATH _ GRAPHING RATIONAL FUNCTIONS

When graphing rational functions, how do I know which directions the graphs go? Example, for equation y = 9/x - x, how would you graph this? Also, why is the horizontal asymptote for f(x)= 2+x / x-7 is 1 instead of 0?

95. ## calculus

how can I calculate this deriivative: 1/(sin(x-sinx))?

96. ## social studies

im doing a project on indians i can't find any information on the great basin ,my project is due tomorrow,can you help me please?

97. ## Math repost for Jose

Math - jose, Sunday, October 14, 2007 at 12:55pm

98. ## History

Critically analyze Greek and Rome philosophical, political and social contirbution to contemporary western civilization

99. ## accounting

I have to prepare an adjusting entry for Dec 31, 2008 for prepaid insurance from this: An analysis of the company's insurance policies provided these facts: Policy A Purchased on April 1, 2007 for 24 month at \$11400. Policy B Purchased on April 1, 2008 for

100. ## chemistry

how can equivalence points of 2 titration curves not be in the same volume range?

101. ## english

how is vocal expression affected by culture? you can give me an example by comparing your native country with the u.s. culture or new york with another city.

102. ## Biology

Which solute out of protein, urea, glucose, chloride, ammonia, "substance x" cannot be filtered into the nephron? Why? I know that urea, protein, and chloride ions can be filtered. I don't know about glucose, ammonia or substance x.

103. ## Science

I need help writing a procedure for my Earth Science class. Our teacher gave us 5 minerals and told us 5 mineral names, but we have to figure out which is which. We could do tests like specific gravity, luster, streak, and hardness. I decided to do

104. ## social studies

which of the united states was named after Julius Ceasar?

105. ## Algebra Two

From 1840 to 1850, the rate at which the percent of the labor force in nonfarming occupations increased was approx. linear. In 1840,31.4% of the labor force held nonfarming jobs. In 1850, 36.3% of the labor force held nonfarming jobs. Write a linear model

106. ## science

what do taste buds do and where do you find the other taste buds?

107. ## Math

Find the slope m, and y-intercept b of the given equation 1. y=5

108. ## Geometry

Write an equation of the line in slope-intercept form with the given slope and the given point F(-4,1), m=3/4

109. ## Algebra II

A rental cas cost a minimun charge plus a fixed chrger per mile drive. One customer drove 280 miles and paid (0\$. Write an equation relating the total cost, C (in dollars), to the miled driven, X.

110. ## math

Find the five-number summary of the following set of numbers. 0.16, 0.08, 0.27, 0.20, 0.22, 0.32, 0.25, 0.18, 0.28, 0.27 I came up with this 0.08, 0.18, 0.223, 0.27, 0.32 Is this correct? and then this one 2. Find the median of the following set of