# Questions Asked onFebruary 27, 2008

1. ## Physical Science

A 0.6-g peanut is burned beneath 50 g of water, which increases in temperature from 22degreesC to 50 degreesc. What is the exact food value of the peanut? (Assuming a 40% efficiency)

2. ## Chem

Consider a salt of the composition, A2B3. For this salt, pKsp=82.55. What is the logarithm of the molar concentrtion of this salt? I'm really at a loss of where to begin. We didn't have any examples like this in class. Thanks!

3. ## Chem

Calculate the mass of baking soda, NaHCO3, needed to neutralize 3.0mL of 3.0 M hydrochloric acid.

4. ## PHYSICS

Two planes fly from toronto to philadelphia. Plane a flies via pittsburgh whereas passenger on plane B have a direct flight. Pittsburgh is 350km due south of Toronto and 390km due west of Philadelphia. The airspeed of both planes is 400km/h and a steady

5. ## speaker vs. poet

What the importance of knowing the difference between the speaker and the writer in a poem?

6. ## General Chemistry

Vinegar is a 5.0% solution by weight of acetic acid in water. Given that the pH for vinegar is 2.41 and that Ka= 1.8E-5 and the density s 1.00g/mL, what is the percent dissociation of acetic acid in vinegar? I know the % dissociation equals the amount

7. ## physics

In a rescue, the 64.0 kg police officer is suspended by two cables,the cable on the left made a 35 degree angle, the rope on the right made a 48 degree angle. What is the tension in the left cable? Find the tension in the right cable.

8. ## physics

A tetherball leans against the smooth, frictionless post to which it is attached.The string is attached to the ball such that a line along the string passes through the center of the ball. The string is 1.20m long and the ball has a radius of 0.120mwith

9. ## Physics

Consider a perfectly inelastic head-on collision between a small car and a large truck traveling at the same speed. Which vehicle has a greater change in kinetic energy as a result of the collision? Since the vehicles stick together after the collision and

10. ## bio

In summer squash, white fruit color is dominant. Yellow is recessive. A squash plant that is homozygous yellow one. Predict the appearance of: (a) the F1 generation, (b) the F2, and (C) the offspring of a cross between an F1 individual and homozygous white

11. ## Community Corrections

Explain the Correctional Officer subculture. How does this subculture create ethical issues for correctional officers?

12. ## Algebra

If a is 50% larger than c and b is 25% larger than c, then a is what percent larger than b?

13. ## ap chemistry

Some reactions that are predicted by their sign deltaG to be spontaneous at room temperature do not proceed at a measurable rate at room temperature. A suitable catalyst increases the rate of such a reaction. What effect does the catalyst have on deltaG

14. ## Uh Biology :)

Ectothermic organisms have body temperatures that vary with the temperature of their surroundings. Discuss the effect this variation might have on the functioning enzymes in these organisms. Suggest ways ectothermic organisms might cope with this problem.

asked by Biology Lover Needs help fast!

Question: hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the website :(, search on google liver lab

16. ## physics

In Figure block 1 of mass m1 slides from rest along a frictionless ramp from height h = 3.10 m and then collides with stationary block 2, which has mass m2 = 5.00m1. After the collision, block 2 slides into a region where the coefficient of kinetic

17. ## Algebra

All the even numbers from 2 to 98 inclusive, except those ending in 0, are multiplied together. What is the rightmost digit, that is, the units digit of the product?

18. ## chem

The accepted value for the universal gas constant is 0.0821 L atm/mol K. Wat would it be if the pressure was measured in torr and the volume in milliliters?

19. ## Biology for school

What is the effect of substrate concentration on enzyme activity? How does enzyme activity change as substrate concentration decreases? Explain on a molecular basis. I am not sure what the question wants from me. Would this be right, and is there anything

20. ## Latin

What does videtisne mean?

21. ## managerial economics

Tots-R-Us operates the only day-care center in an exclusive neighborhood just outside of Washington, D.C. Tots-R-uS is making substantial economic profit, but the owners know that new day-care centers will soon learn of this highly profitable market and

22. ## Chem

What is the pH of the resulting solution if 30.00 mL of 0.100M acetic acid is added to 10.00mL of 0.100 M NaOH? For acetic acid, Ka=0.000018. I know that NaOH is a strong base and acetic acid is a weak acid. What is the equation: C6H5COOH+NaOH C6H5COOH

23. ## algebra 1

Got a test tomorrow... Say you have a system of equations (linear), that you can solve using substitution, graphing, or elimination. Without solving the equations, can you tell if there is one solution, many solutions, or no solution?

24. ## algebra..urgent!!!!

MArta has \$6000 to invest. She puts x dollars of this money into a savings account that earns 2% interest per year. With the rest, she buys a certificate of deposit that earns 4% per year. i need 2 different equations. [using a=prt and/or a=p(1+r/n)^nt]

25. ## Chemistry

In the reaction PCl3 + Cl2 ---> PCl5. If the rate doesn't increase when the concentration of PCl3 is doubled and the rate increases by a factor of four when the concentration of Cl2 is doubled, how would I write the rate law for the reaction?

26. ## chemistry

I am confused on how to do the last question. Calculate molarity of HCl from the volumes of acid and base at the equivalence point and the molarity of NaOH from the titration curve. (M of Acid)x(v of acid)= (m of base)x(v of added base) M1= 0.50M of NaOH x

What does this case teach you about the need for constant change in marketing?

28. ## Physical science

After a car is driven for some distance, why does the air pressure in the tires increase?

29. ## science (chem)

I have a question. I'm forming Isopentyl acetate by the esterfication of acetic acid with isopentyl alcohol. The rxn is shifted so that the ester is produced by using excess acetic acid. In isolating the ester, the excess acetic acid and and isopentyl

30. ## Labs: Biology 12

Question: hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the website :(, search on google liver lab

31. ## This is grade 12 biology

What is the effect of enzyme concentration on enzyme activity? Explain how much enzyme activity changes as enzyme concentration decreases, and discuss why this occurs (on a molecular level). Is this right (and can you add more): As enzyme concentration

32. ## biology -urgent...highly confused

How does pH affect the activity of catalase? Consider both high and low pH, and explain your observations by discussing the effect of pH on protein structure. I cannot find anywhere in my notes, or text book, or even on the internet how pH affects

33. ## chemistry

Gaseous arsine reacts according to the balanced equation. If a total of -3663 KJ of heat is produced in the reaction as written, how many grams of AsH3 are consumed? (Enthalpy= -1867.2) 2 AsH3(g) + 3 O2(g) --> As2O3(s) + 3 H2O(l)

34. ## math

I am having trouble solving this problem. In 1994, the population of the Las Vegas metropolitan area was about 1,076,000 with an average annual growth rate of 6.5%. Assume this growth rate continues into the future. I have to estimate the population of Las

35. ## english

I'm trying to study satire. I found this poem online Now if you take an orange And hold it in your hand, It isn't really there at all - Or so I understand. A sensationalist will prove to you That though you know it's there, It's only just sensations Of

36. ## managerial economics

The New York City Parks Department doubled the annual fee for the hot-dog pushcart that had the exclusive license for the spot just south of the Metropolitan Museum of Art to \$288,000. Why would anyone pay almost \$300,00 for a pushcart license? Who is

37. ## chemistry

Which of these ions may be precipitated as sulfides? Assume neutral aqueous solution, pH=7. Silver (I) ion Sodium ion Calcium ion Lead (II) ion Manganese (II) ion Ammonium ion I think the silver I ion, lead II ion, and manganese ion may be precipitated as

38. ## english

please help revise In the research analysis paper I will write about black women and their oppression. I will focus on how black women have overcome oppression and look at women in power such as Oprah, Condalisa Rice, and other. The body of the paper will

39. ## Cultural Diversity

What other measurements sociologists use to calcalculate prejudice?

40. ## American History

How did isolationist beliefs affect immigration policy during 1920s? Is nativism similar to isolationism? I only know how the nativist sentiment affected the immigration policy, but I don't know about the isolationist beliefs. Please explain. THANKS A LOT!

41. ## English II

Read The Following Anecedote And Give Examples From Modern Life Illustrating How A Catastrophe Occured Because Of Some Insignificant Event. Napoleon's army was defeated at Waterloo because one of his strongest units of cavalry was misdirected by a peasant

42. ## English expression

A: I haven't seen you in ages. How have you been? B: I'm fine. -------------------------- Is this dialogue correct? Do we have to answer,'I'm fine.' or 'I've been fine.'? Can we say 'in an age' instead of 'in ages'?

43. ## writeateacher help> english

Maximizing the notion of the presidency, political scientist Richard Neustadt argued that presidential power lies not in the office's legal authority, but rather in the personal and strategic skill of individual presidents (p.2). Neustadt was a professor

44. ## English

I want to know the correct capitalization for black and white, referring to people.. In otherwords, if I say, "He is Black and she is a white woman," is that capitalization correct? Whites and Blacks are the same except for different skin color. If you

45. ## Chemistry

The following equations are intepretations of the evidence from the reactions of four metals with various cation solutions. Make a table of half-reactions and arrange the four metallic ions and the hydrogen ions in order of their decreasing tendency to

46. ## Chem 2

1.057 grams of a substance with a molar mass of 385.336 g/mol are dissolved in 249.92. Ther temperature for the system changes from 83.83 to 52.38 degrees C during the mixing. What is the DH(heat of solution) for this process in kJ/mol. Assume that th

47. ## history

where do bills or ideas for laws come from??? what bills or ideas might each group of people suggest?

48. ## modern algebra

I have two questions... I would really appreciate some help... 1) Suppose phi is a homomorphism from G to G' and that G' has an element of order 8. Prove that G has an element of order 8. (I can show that G has an element g^8 that maps to the identity in

49. ## English

Picking out main sentences from paragraphs in a text, is there something to help spotting the best sentence (in any text)???

50. ## molarity

what mass of sodium hydroxide, NaOH, must be dissolved to make 460 ml of a 1.10 M solution

51. ## math

what is an upper bound on the absolute value of the error? the abs value of (the sum from n=1 to infinity of ((-1)^(n+1))/(n*5^n) where it is -.1826666....)

52. ## arithmetic

Word Problem: A hospital needs to figure the annual budget for an 11 bed facility based on 90% occupancy using a 4 day length of stay. 1st day = \$625.00, 2nd day - \$315.00, 3rd day = \$315.00 and 4th day = \$220.00. How much money can they expect to make for

53. ## english-othello

I have to compare Iago in othello to Ambrose's message in St. Augustine's Confessions. Ambrose's message is to not take the Bible literally, but figuratively so that he can understand the deeper meaning. I must say how Iago's lesson is the opposite of what

54. ## chemistry

say A -> B + 5kJ would reactants have more enthalpy or products have more enthalpy? I think first, the delta H would be negative. So H final must be less than H initial. So reactants have more enthalpy?

55. ## Mathematics

(2x)^2(3x)^3=3.548E82 How do I even do this type of math problem am just totally lost here????

56. ## music

I cant seem to think of any words to complete this sentence: The woodwind section is like because

57. ## literature

My assignment is to find two stories from the 19th century. But the stories have to be good enough to into a musical that my class will actually perform for my highschool. I was looking for some of the darker stories, but I don’t know were to find them.

58. ## biology

In DNA, I know that hydrogen bond connects the nucleotides of each strand, but what type of bond holds the two strands together? is it covalent?

59. ## repost bio

What is the effect of substrate concentration on enzyme activity? How does enzyme activity change as substrate concentration decreases? Explain on a molecular basis. I am not sure what the question wants from me. Would this be right, and is there anything

60. ## Social Studies

What are the immigration and emigration issues in Ireland and what are some population issues that Ireland is dealing with?

61. ## english-othello

It is quoted in Augustine's confessions, "the letter killeth, but the spirit giveth life." if this is so, then I believe Ambrose is telling Augustine the the letter, or the law, or exact words in the bible aren't meant to be taken literally, but

62. ## Algebra

What values for x, if any, must be excluded in each of the following algebraic fractions? 1.17/x 2.3/(x-2)= 3.3x/((x+1)(x-2))= 4.(2x-1)/(3x^2+x-2)

63. ## english?

Im I stating a clear purpose for my paper? In this study, I will write about black women’s oppression. I will focus on sexism and racism and how it causes black women’s daily oppression in addition to how it continues to exist through education,

64. ## Algebra

What is the sum of all two digit positive integers whose squares end with the digits 01?

65. ## Algebra Variation Constant

What does this mean? Do I graph this or what? Find the variation constant and an equation of variation where y varies directly as x and y=12 when x=2 The variation constant =? The equation of variation is y=?

66. ## algebra

An elevator when full holds 20 kids or 15 adults. If 12 kids are on the elevator how many adults can still get on. I need to use an algebraic equation/expression to solve this word problem..I need step by step solutions to explain it...Thank you...

67. ## english

Please help me to correct my grammar. Thanks Exercise is bodily activity that helps for the development and maintenance of physical fitness and overall health. It strengthens musculoskeletal and cardiovascular system; even the soci-psychological aspects of

68. ## Accounting

I thought a post closing trial balance is when you list all your accounts and their credit/debit amount and then debits should match credits. When I do this they do not match. Is there something Im doing wrong? Cash in bank 4000 Accts Reciev 500 Accts

69. ## chemistry

If the molecular speed of a gas increases, its rate of diffusion will__________.

70. ## Math

This question makes reference to an orthonormal basis (i,j), and an origin O. 1. Consider the triangle ABC, with vertices A(0,-2), B(9,1), C(-1,11). Find: a) a cartesian equation of the altitude from C; b) a cartesian equation of the circle which has BC as

71. ## math

test the series for convergence or divergence. the sum from n=1 to infinity of ((-1)^n*e^n)/(n^3) I said it converges because the derivative of (1/n^3) is decreasing

72. ## Algebra

Solve the matrix equation: |4 -5||m|=|32| |1 2||n|=|-5| I don't get it

73. ## trigonometry

Hello! I was wondering if someone could check my answer and tell me if I'm on the right track: "Find a model for simple harmonic motion satisfying the specified conditions" Displacement(t=0), 2ft Amplitude, 2ft Period, 10 sec This is what I got: y=2cos

74. ## calculus

test the series for convergence or divergence using the alternating series test the sum from n=1 to infinity of (-1)^n/(3n+1) I said it converges, is this true?

75. ## calculus

what is an upper bound on the absolute value of the error? the abs value of (the sum from n=1 to infinity of ((-1)^(n+1))/(n*5^n) where it is -.1826666....)

76. ## Biology

Which plant cells lack a nucleus? A) sieve cells B) xylem C) companion cells D) both companion and parenchyma cells E) both xylem and sieve-tube cells Why is the answer E?

77. ## science

how many bones are there in the human skeletal

78. ## math

Hi, I had a question about exponential functions. If f(x)=ab to the x power, were a does not equal zero, b is greater than 0 and b does not equal one. Therefore if b=1/2, then the graph of the function never crosses the y-axis. What is the answer to this

79. ## literature

My assignment is to find two stories from the 19th century. But the stories have to be written by 2 diferent authors. I was thinking of something dark or horror, but not poe.

80. ## English expression

Have you ever heard of e-pals? I often e-mail my e-pals these days. ------------------------------------- In the sentences above, what is the meaning of 'e-pal'?

81. ## English expression

1. It's a kind of shopping by computer. 2. It's a kind of shopping on the computer. 3. It's a kind of shopping on-line. 4. It's a kind of on-line shopping? --------------------------------- Are they all the same? Can we use 'on the computer' instead of 'by

82. ## english

How can I word these sentences better? 1)Regardless of how misery changes a person, everyone always wants to get rid of it. 2)The characters of the novel demonstrate how misery drives people to do things they would not normally do. 3)While standing near

83. ## Algebra Check

Rewrite the following expression with positive exponents (16xy)^5/6 = 1/(16xy)^5/6?

84. ## Algebra

Multiply (a+1/2)(a+1/4) 1.25a? or 1 1/4a ?

85. ## english

please help revise In the research analysis paper I will write about black women and their oppression. I will focus on how black women have overcome oppression and look at women in power such as Oprah, Condalisa Rice, and other. The body of the paper will

86. ## english help revise

The underlying cause of the northern Uganda rebellion is ethnic conflict. Comparable to what we have recently learned many ethnic groups like the Acholi frequently dislike each other due to one ethnic group’s economic exploitation or political domination

87. ## Algebra

What is the sum of all possible digits that could fill in the blank in 47_021 so that the resulting five digit number is divisible by 3?

88. ## chem

what are Gregor Mednel's two greatest impacts on modern times.

89. ## Chemistry

Predict the most likely redox reaction and use the spontaneity rule to predict whether the reaction will occur spontaneously. 1. An aqueous solution of potassium permanganate was reacted with an acidic solution of sodium bromide and an orange-born

90. ## English

When creating an argument, regardless of type, you must write it to ensure it not just read, but also what? A. Understood B. Utilized C. Heard D. None of the above

91. ## Chem

Which of these ions may be precipitated as sulfides? Assume neutral aqueous solution, pH=7. Silver (I) ion Sodium ion Calcium ion Lead (II) ion Manganese (II) ion Ammonium ion I think the silver I ion, lead II ion, and manganese ion may be precipitated as

92. ## Math: Cross Product

Prove that | a x b | = (sqrt) [(a (dot) b)(b (dot) b) - (a (dot) b)^2]

93. ## Algebra

How can you determine if two lines are perpendicular?

94. ## physical science test tommorrow

what is the difference between constant acceleration and uniform acceleration

95. ## BioChemistry

What and where is the equivalence point? Is it in the beginning of the experiment or at the reaction point?

96. ## math

I was wondering if this statement is true or false. The statement is 0 times h(4)= h(0 times 4). Is this true or false and why?

97. ## English Grammar

1. Type Jennifer on Google, and you can find a lot of free videos of her. 2. Type Jennifer on Google, and you can find a lot of free videos of hers. 3. Type Jennifer in the address box on Google, and you can find a lot of free videos of her. 4. Type

98. ## english

could you possibly give me a site where i could find the story: silent snow secret snow by conrad aiken?

99. ## Alegebra

w=Cr^-2 solve for r

100. ## bio

I know that hydrogen bond connects the nucleotides of each strand, but what type of bond holds the two strands together? is it covalent?

101. ## algebra

The positive integer 4 can be represented as a sum of 1's or 2's in five ways, such as 1 + 2 + 1 and 1 + 1 + 2. Show all the ways that the positive integer 5 can be represented as a sum of 1's or 2's.

prefecalel

103. ## ETH 125

should united states gov't policy favor certain kinds of immigrants

104. ## calculus

test the series for convergence or divergence. the sum from n=1 to infinity of ((-1)^n*e^n)/(n^3) I said it converges because the derivative of (1/n^3) is decreasing is this true?

105. ## social studies

The mediterranean Sea is almost completely enclosed by land. What three continents boarder it?

106. ## algebra 1

MArta has \$6000 to invest. She puts x dollars of this money into a savings account that earns 2% interest per year. With the rest, she buys a certificate of deposit that earns 4% per year. i need 2 different equations. [using a=prt and/or a=p(1+r/n)^nt]

107. ## Science/ math

A student measures the mass of 8o ml of liquid in a Graduated cylinder. The cylinder alone has a mass of 50.5 g. The cylinder plus the liquid has a Mass of 70.5 g. What is the density of the liquid?

108. ## nutrition

How are food-borne illnesses contracted? What are some ways you can protect yourself and others from food-borne illnesses at home? Give three examples to support your answer.

109. ## Physical Science

On which temerature scale does the average kenetic energy of molecules double when the temperature double?

110. ## math

if u have 5(square root)3^2 what would be your answer/steps to finding it?

111. ## Ap Chem,

1) What kind of chemistry makes it possible for DNA of materials being tested to lodge at only one kind of probe molecule? 2) What is normally the connection between damage to a cell and the p53 protein? 3) From the perspectives of the society as a whole,

112. ## math

(-11) (1/8) find the product

113. ## algebra

could you please tell me if this is a polynomial function.... x^2 square root of 2 +x-5

114. ## german

what is good morning in german?

115. ## science

what do you get from cinnabar

116. ## english

how would you approach creating a negative message for a superior versus creating a message for a colleague

117. ## spanish

Can someone please check to make sure i used the imperfect and pretirite tenses at the right times and please check my grammar. En esta foto, mi familia y you estabamos en Atlantis, Paradise Island Bahamas. Yo era once años y en la nota de sexto. Todos

119. ## global history

why did austria declare war on serbia?

120. ## math

Hi, me and my friend think two completely different answers to the same question the question is 4pq if p = 3 and q = -6 the 2 different answers are a) 4x3x-6 b) 12-24 Please can you tell us which is right or are we both wrong? If so what is the answer and

121. ## math

test the series for convergence or divergence using the alternating series test the sum from n=1 to infinity of (-1)^n/(3n+1) I said it converges, is this true?

How do u write a good extended response ??

123. ## spanish

was wondering if someone could look over these sentences and see if they make sense. en el verano, nosotros fuimos en el excusion. (is there another word for road trip?" despues, cargamos la carro y salimos. ( after we packed the car and left.) gastamos

124. ## math

is 1 + x + (x-1)^2 + (x-2)^3 + (x-3)^4+... a power series?