Questions Asked on
February 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)

    asked by Rachel
  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!

    asked by Barbie
  3. Chem

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

    asked by kelly
  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

    asked by LILY
  5. speaker vs. poet

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

    asked by jen
  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

    asked by Matt
  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.

    asked by Erin
  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

    asked by Erin
  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

    asked by Jim
  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

    asked by Anonymous
  11. Community Corrections

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

    asked by Kish
  12. Algebra

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

    asked by PRIDE
  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

    asked by kali
  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!
  15. PLEASE RESPOND!!

    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

    asked by Rory
  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

    asked by gia
  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?

    asked by PRIDE
  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?

    asked by shawn
  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

    asked by Huckabee
  20. Latin

    What does videtisne mean?

    asked by Anonymous
  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

    asked by jean
  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

    asked by Sarah
  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?

    asked by Lily
  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]

    asked by trixie
  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?

    asked by Raj
  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

    asked by Tim
  27. Understanding Business

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

    asked by Alvis
  28. Physical science

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

    asked by Rachel
  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

    asked by ~christina~
  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

    asked by Rory
  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

    asked by Gilmore
  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

    asked by Leo
  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)

    asked by Anonymous
  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

    asked by Vanessa
  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

    asked by annika
  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

    asked by jean
  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

    asked by Sarah
  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

    asked by jenny
  39. Cultural Diversity

    What other measurements sociologists use to calcalculate prejudice?

    asked by Scooby
  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!

    asked by Angelica
  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

    asked by Alarice
  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'?

    asked by John
  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

    asked by Christi
  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

    asked by Suzi Q
  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

    asked by Alex
  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

    asked by Amanda
  47. history

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

    asked by monica
  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

    asked by daniel
  49. English

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

    asked by Anonymous
  50. molarity

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

    asked by erica
  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....)

    asked by sarah
  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

    asked by Raymond
  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

    asked by laura
  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?

    asked by william
  55. Mathematics

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

    asked by Josh
  56. music

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

    asked by Carlyn
  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.

    asked by lizi
  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?

    asked by Anonymous
  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

    asked by Huckabee: repost
  60. Social Studies

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

    asked by Maddie
  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

    asked by laura
  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)

    asked by maria- HELP PLEASE
  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,

    asked by jenny
  64. Algebra

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

    asked by PRIDE
  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=?

    asked by Micah
  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...

    asked by Ben3
  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

    asked by jessie
  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

    asked by Seana
  69. chemistry

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

    asked by matt
  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

    asked by Anonymous
  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

    asked by sarah
  72. Algebra

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

    asked by Jon
  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

    asked by Katie
  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?

    asked by sarah
  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....)

    asked by sarah
  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?

    asked by Cindy
  77. science

    how many bones are there in the human skeletal

    asked by marc
  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

    asked by Arianna
  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.

    asked by lizi
  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'?

    asked by John
  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

    asked by John
  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

    asked by jm
  83. Algebra Check

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

    asked by Marysvoice
  84. Algebra

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

    asked by Marysvoice
  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

    asked by jenny
  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

    asked by Christi
  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?

    asked by PRIDE
  88. chem

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

    asked by Jon
  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

    asked by Alex
  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

    asked by John
  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

    asked by Sarah
  92. Math: Cross Product

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

    asked by Anonymous
  93. Algebra

    How can you determine if two lines are perpendicular?

    asked by Patrick
  94. physical science test tommorrow

    what is the difference between constant acceleration and uniform acceleration

    asked by sam
  95. BioChemistry

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

    asked by Lisa
  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?

    asked by Linda
  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

    asked by John
  98. english

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

    asked by Cynthia
  99. Alegebra

    w=Cr^-2 solve for r

    asked by avincent
  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?

    asked by Anonymous
  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.

    asked by PRIDE
  102. english

    prefecalel

    asked by anonymous
  103. ETH 125

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

    asked by sugrbare24
  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?

    asked by sarah
  105. social studies

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

    asked by Chance
  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]

    asked by Trixie
  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?

    asked by anum
  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.

    asked by Kish
  109. Physical Science

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

    asked by Rachel
  110. math

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

    asked by Cynthia
  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,

    asked by Starr
  112. math

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

    asked by selina
  113. algebra

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

    asked by jimmy
  114. german

    what is good morning in german?

    asked by morgan
  115. science

    what do you get from cinnabar

    asked by sharney
  116. english

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

    asked by sugrbare24
  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

    asked by Miley
  118. eth 125

    bilingualism in education, cons and pros of, disadvantages and advantages

    asked by AXIA
  119. global history

    why did austria declare war on serbia?

    asked by jayda
  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

    asked by bugz and manzz
  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?

    asked by sarah
  122. writing/reading

    How do u write a good extended response ??

    asked by Jessica
  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

    asked by ami
  124. math

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

    asked by Anonymous
  125. math

    first was w=Cr^-2 solve for r I came up with r=sqrt of C/w Now I have imputed numbers that were provided to come up with the equation 3,963=sqrt c/100 I squared both sides to come up with 15,705,369=c/100 Now I am stuck. Trying to solve for C. Am I on the

    asked by avincent
  126. History

    what made the Works Progress Administration so important?

    asked by Amanda