Questions Asked on
December 11, 2007

  1. chemistry

    how do i write a net ionic equation for Lead (II) Nitrate and Sodium Carbonate react to form Lead Carbonate and Sodium Nitrate??

    asked by caren
  2. physics

    A water slide is constructed so that swimmers, starting from rest at the top of the slide leave the end of the slide traveling horizontally. There is still a height between the surface of the water and the end of the slide. One person hits the water 5.00m

    asked by ajo
  3. pre-cal... compound interest and modeling data

    Please help me with these 2 problems! 1. Complete the table for the time t necessary for P dollars to triple if interest is compounded continuously at rate r. r= 2%, t=? r= 4%, t=? r= 6%. t=? r= 8%, t=? r= 10%, t=? r= 12%, t=? 2. Draw a scatter plot of the

    asked by anonymous
  4. Chemistry

    All of the following are weak acids except HF H3PO4 H2SO4 HNO2 HC2H3O2

    asked by Lauren
  5. PLEASE HELP

    with the following problem: A wagon was used to move a 90 lb rock 120 yds. It took 40 seconds and 70 lbs of force. Find Horsepower and Efficiency % THANKS.

    asked by Heather
  6. physics

    A horizontal plank (m = 2.0 kg, L = 1.0 m) is pivoted at one end. A spring. (k = 1.0 x 10. 3. N/m) is attached at the other end find the angular frequence for small oscillations?

    asked by shan
  7. math

    what is the square root of x4

    asked by Hillary
  8. Chemistry

    Which of the following is a weak base HOCl LiOH Ba(OH)2 KOH NH3

    asked by Lauren
  9. College Math

    Express each decimal of integers, in simplest form. 0.1 with the repeating decimal 1

    asked by Pumpkin
  10. Chemistry

    When an aqueous solution of lithium chloride is mixed with an aqueous solution of ammonium sulfate a precipitate forms a new salt is formed a gas is evolved an acid and base are formed no reaction occurs I either thought it was a precipitate forms or no

    asked by Lauren
  11. Julia - Green's theorem

    Sorry, I did not see your question ================================= Posted by julia on Monday, December 10, 2007 at 9:15pm. Can someone show me step by step how to work this problem out please. Let C be the triangle with vertices (0,0), (1,0), and (1,2).

    asked by Damon
  12. Ethics

    Asian Americans and Pacific Islanders are a model minority. Asian Americans and Pacific Islanders belong to a single “Asian American” culture.

    asked by Mikalah
  13. Math Word Problem

    Counting Chicken Wings At Annie's Home-Cooked Chicken Wings Restaurant, chicken wings are served by the bucket. The Biggest Bucket O'Wings is really big! Figure out how many wings are in the bucket. If the wings are removed two at a time, one wing will be

    asked by Linda
  14. college math

    A couple plan to have exactly three children. (a) Construct a tree diagram and list the sample space. (b) Find the probability that the family has at least two girls.

    asked by Rose
  15. Chemistry - 1st Yr College Level

    The corrosion of iron can be thought of as an electrochemical cell reaction. Calculate the voltage difference between two points of corroding iron differing only in their partial pressures of oxygen: 0.20 atm of oxygen at one point and 0.0010 atm of oxygen

    asked by Anne
  16. chemistry!

    Indicate the type of intermolecular forces expected with each of the following compounds. H2 Li2CO3 LiOH C3H7OH choices include: Hydrogen Bonding,Ion-Molecule and vanDerWaals. help me! please!!!! im so stuck!

    asked by daniella
  17. english

    can someone explain how to use the word serenity in a sentence? examples please? Would you say someone is filled with serenity?

    asked by Anonymous
  18. US History

    Describe Thomas Jefferson's view of the federal government and its responsibilities.

    asked by Anonymous
  19. AP Chem

    a 4.22 gram sample of copper II sulfide was added to excess hydrocholoric acid with hydrogen sulfide gas being generated and collected over water. What volume of hydrogen sulfide gas would be collected at 32 degrees Celcius and 749 torr? The vapor pressure

    asked by Susan Shoemaker
  20. compound interest

    How do I solve these problems? Complete the table for a savings account in which interest is compounded continuously. 1. Initial Investment: $1000 Annual % Rate: 3.5% Time to Double: ? Amount After 10 Years: ? 2. Initial Investment: $750 Annual % Rate: ?

    asked by anonymous
  21. economics

    Fill in the blanks. 1. Reason for unemployment: _____________________________ Type of uneployment: very low employment 2. Reason for unemployment: a healthy economy that is working properly Type of unemployment: _____________________________

    asked by anonymous
  22. pre-Algebra

    Write the following as a fraction and show your work. 0.83 (the three is repeating) I don't know how to do it with only one of the numbers repeating and it is not in my book.

    asked by Greg
  23. math

    express the following in form of a+bi: (5i)(-3/5i)

    asked by aru
  24. Chemistry

    Which if the following compounds is insoluble in water (NH4)2CO3 AgBr CuSO4 KI LiNO3 I thought it might be AgBr

    asked by Lauren
  25. ALGEBRA

    1, Factor each expression x^2 - 10x - 24 A. (x + 4)(x - 6) B. (x + 6)(x - 4) C. (x + 2)(x - 12) D. (x + 12)(x - 2) 2, x^2 - 36 = 0 A. (1 + square root of 3, 1 - square root of 3) B. (-6,6) C. No solution D. None of these 3, Factor each expression 49 x^9 -

    asked by STUCK
  26. WRITING

    What differences did you notice between your logical reasoning process and your moral reasoning process?

    asked by LILI
  27. algebra

    On Monday, Voltaire drove to town at 60 miles per hour. On Tuesday, he drove to town at 40 miles per hour. If the totaling traveling time for both trips was 15 hours, how far was it to town? I know distance=(rate)(time).so I set it up like

    asked by Anthony
  28. geometry

    what is the equation of the line whose slope is -3 and which passes through (0,5)?

    asked by sara
  29. Science

    How does a raw banana relate the second law of thermodynamics to the changes in energy observed in Appendix C. How did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth trophic levels? Considering the

    asked by Danny
  30. science

    What is the importance of decomposers in the carbon cycle? Explain why nitrogen is important to organisms?

    asked by LISA
  31. social studies

    what does a search engine do?

    asked by kyesha
  32. Science

    A wagon was used to move a 90 lb rock 120yds. It took 40 sec and 70 lbs of force to do this. Find horsepower and efficiency

    asked by Heather
  33. physics

    Two blocks of mass m1 = 1.2 kg and m2 = 1.7 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.45. Calculate the speed of the blocks

    asked by anonymous
  34. college math

    A box of chocolates contains 20 identically shaped chocolates. Five of them are filled with jelly, three are filled with caramel, and twelve are filled with nuts. What is the probability that one chocolate chosen at random is filled with jelly, caramel, or

    asked by Rose
  35. physics!

    A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 40.0m/s. The bat does nonconservative W=70.0J on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0m above

    asked by kabo
  36. Bobpursley for this question please, physics

    I don't understand though why you can make w/mlambda I thought it was the otherway around? (in regards to this w/N sinTheta= m lambda N= w/(m lambda) * sinTheta N= w/(m lambda) * x/L

    asked by URGENT
  37. college math

    How many different four-digit numbers can be formed from the digits 0 through 9 if the first digit must be even and cannot be zero?

    asked by Rose
  38. english

    ok i have to write a research essay on the viet cong but i don't no how..... plez help me today if u can thanks

    asked by no name
  39. Science

    Please help with the formula for efficiency in realtion to horsepower?

    asked by Heather
  40. Chemistry

    Which of the following indicates the exsistence of stron intermolecular forces of attraction in a liquid? a very low boiling point a very low vapor pressure a very low critical pressure a very low viscosity a very low heat of vaporization

    asked by Lauren
  41. grammar

    In the following sentences, what are the common and nouns? First sentence: Often on October outings, Otto offers oranges to officers. In this sentence I am confused by October. It seems like it should be a proper noun, but in a way it seems like it is

    asked by Lisa
  42. College Algebra~Can someone check my answers pls

    f(t)=log(t-5) t-5>0 t>5 g(x)=5e^x all real numbers g(x)=In(t+4) t+4>0 t>4 g(t)=5^t all real numbers

    asked by Alicia
  43. chemistry

    2.5 moles of Cl2 reacts with a large excess of P4. The actual yield of PCl5 is 0.50 moles. What is the percent yield? P4(s) + 10 Cl2 (g)-> 4 PCl5 (g)

    asked by Bryan
  44. Hearing Loss/Causes

    If a deaf person HAS A DB loss of 76.1 for their right ear and a DB loss of 82.2 for their left ear than what is the persons DB loss? I don't understand how I would find the persons DB loss.

    asked by Mack
  45. opinion question: ATM fees

    Should banks be allowed to charge ATM fees? Why?

    asked by anonymous
  46. physics

    describe the death of a massive star (10 solar masses)

    asked by Rosio
  47. physics

    what is a black hole and how does a black hole form?

    asked by Rosio
  48. Physics

    A wagon was used to move a 90 lb rock 120 yds. It took 40 sec and 70 lbs of force. Can someone help me solve for efficiency and horsepower????? PLEASE :)

    asked by Heather
  49. physics

    true or false: according to einstein, a gravitational field is equivalent to an accelerating frame of reference.

    asked by rosio
  50. Hearing Loss/Causes

    I need notes on the category's of hearing loss and a persons DB Loss.

    asked by Mack
  51. English paper

    Anti-!@#$%^& feminist Andrea Dworkin suggests that !@#$%^&ography is a new genre used by men to humiliate and subjugate women. Her essay “The New Terrorism” opens with rape and wife beating statistics committed against women by men in the United

    asked by Christi
  52. College Math

    12 base 5 divide by 4021 base 5

    asked by Pumpkin
  53. inflation

    how does inflation affect each of the following? *fixed income *savings

    asked by anonymous
  54. economics vocab.

    Key terms: *frictional unemployment *seasonal unemployment *structural unemployment *cyclical unemployment *census *unemployment rate *full employment *underemployed *discouraged worker 1. My cousin Harold is used to ______________, since he works for a

    asked by anonymous
  55. FINANCING

    What are some areas or businesses, besides the government, where we may see value in cash accounting strategies? Incidentally, there is one country that does not use cash basis accounting. Does anyone know the country using accrual accounting methods?

    asked by Jess
  56. French

    for summer...ete or l'ete, how do i know which one to use?...sometimes its cet ete...sometimes its l'ete...its confusing.

    asked by Miche
  57. HEEEELLLLLPPPP!!!!!!

    Can soneone please help me where it says Hearing Loss/Causes

    asked by Mack
  58. Communication

    Identify a source of miscommunication with which you are familar. How can this type of miscommunication be effectively addressed or completely avoided?

    asked by Sonya
  59. math

    simplify (4a4)-3/2/(b2)

    asked by Hillary
  60. chemistry

    if [OH-]=10-pOH. NAd the pOH=7.85 then what does [OH-]equal?

    asked by Hillary
  61. sci275

    considering the amount of energy required to produce animal based foods and goods, should humans change their habits so they consume products closer to the bottom of the food chain because it is more efficient?

    asked by melly
  62. chemistry

    Two acids have the following pKa values:3.85 and 5.65. what are the corresponding Ka values?

    asked by Hillary
  63. englisg

    who were the viet cong????????????????????????????????/

    asked by bre bre
  64. chemistry-last one i swear

    calculate the normality of Ca(OH)2 in a solution made by dissolving 4.75 g Ca(OH)2 in enough water to a make 250 mL of solution

    asked by Hillary
  65. Math - Working with Logs!!

    On September 26 2001, an earthquake in North Bay measured 5.0 on the Ritcher scale. What is the magnitude of an earthquake 3 times as intense as North Bay's earthquake? I would post my answer, but in text, it's just confusing and I can't post picture links

    asked by Anonymous
  66. math

    simplify r2/3r-1/r-1/2

    asked by Hillary
  67. U.S. History

    Where can I find statistics for the Trail of Tears? I've found plenty of generalizations and estimations, but I would also like to know how many white army people went along and how many of them died.

    asked by Anonymous
  68. math

    is the answer to r2/3r-1/r-1/2 r7/6/r1

    asked by Hillary
  69. PreCalc

    Solve the system by the addition method -10x^2 + 10y^2-320=0 30x^2 + 6y^2 - 336 = 0

    asked by LT
  70. PHYSICS!!!HELP£¡£¡

    A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 40.0m/s. The bat does nonconservative W=70.0J on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0m above

    asked by kabo
  71. math

    simplify: (2x1/3y-2/3)6/(x-4y8)1/4

    asked by Hillary
  72. Science/Biology

    Pick the BEST answer: A)Which Of The Following Is An "Excitable Cell"? 1) Neuron 2) Electron 3) Hormone 4) Both 1 & 2 5) All Of The Above B)What Is The Popular Molecule That Energizes Many Activities In Cells? 1) Adenosine Triphosphate 2) Adenosine

    asked by Biomed
  73. government

    I need to compare/contrast the Illinois judicial branch to the national judicial branc and give at least three good similarities and three differences.

    asked by Ian
  74. Chemistry

    How many protons, neutrons, and electrons are in 24 +2 Mg 12 is it 12p, 14e- or 10 e?

    asked by G
  75. Environmental

    environmental sustainability

    asked by Bailey
  76. Architecture

    When you draw an elevation from a floorplan, how do you determine the vertical height of windows and doors?

    asked by Tay
  77. microeconomics

    Describe some of the opportunity costs when you decide to do the following. Attend college instead of taking a job Watch a movie instead of studying for an exam. Ride the bus instead of driving your car

    asked by gina
  78. microeconomics

    how would you use principle of marginal analysis to make a decision.

    asked by lisa
  79. sci

    provide a descipitation and temperature for summer and winter. Then identify the characteristics of a plant and animal that is seen regularly in your region. How do the characteristics relate to the amount of rain or sunlight in your region.

    asked by jamie
  80. Microeconomics

    Consider a competitive firm that produces tomatoes. The total fixed costs are $10 and TVC is related to output according to the followin scheduele Quantity TVC 0 0 1 45 2 85 3 120 4 150 5 170 1)Compute ATC and MC 2) What is quantity if P=40 3)what is

    asked by Mark
  81. Algbra I

    how do i do a problem like this and other problems like this: Write an equation in point-slope form of the line that passes through the given point and has the given slope. (-8,-2) M=2

    asked by Mike
  82. MATH

    HOW DO YOU TURN A PERCENT IN TO A DECIMAL???

    asked by JOEY
  83. chem.

    Hydrogen Chloride and Sodium Carbonate react to produce Hydrogen Carbonate and Chloride Sodium how do i write that in net ionic form?

    asked by michelle
  84. macroeconomics

    i have a college macroeconomics question due tommorow can u help?? economy decribed as follows: C=14,000+.5(y-t)-40,000r I=8000-20,000r G=7000 NX=-1800 T=8000 Y=40000 1)find a numeric equation relating planned aggregate expenditure to output and the real

    asked by sam
  85. Algebra 1

    126a(-1/9a)(1/7a cubed) and the answer to this in my book says -2a to the fith. How does it work, i've tried multiple times.

    asked by Elizabeth
  86. math

    can someone help me with this? find the next three terms? -100, -40, -16, -6.4,......

    asked by andy
  87. Never Mind

    I'm just gonna call my friend, she's really good in math. THANKS FOR ALL THE HELP!!!

    asked by Elizabeth
  88. English Expressions

    1. Curiosity and concentration are important components in memorizing items. If you have a strong desire to learn and memorize, you can memorize it better. 2. Bisarre association is important. If you want to memorize two items together using association,

    asked by John
  89. Chemistry

    how could I figure out which molecule has the stongest bond if I am given some such as HF AND HI.

    asked by Susi
  90. Religion Research Paper

    1. Considering that Hinduism lacks a uniting belief system, what makes up the Hindu religion? 2. What are the cultural and societal influences that have made Hinduism vital to the region in which it originates? 3. Explain the desire for liberation from

    asked by Danny
  91. spanish

    preocuparse darse prisa ok what do they mean and would i have to change them if i say like: por la manana no olvidarse de darle de comer al perro??

    asked by chelsea
  92. math

    when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees?

    asked by robert
  93. English

    Can someone check over the grammatical errors in my riddles. Do you have any suggestions on how to improve them? Often revered for my beauty, I am put on the spot. King Arthur’s lover is what I am suspected to be but the truth is I see in Lancelot what

    asked by Anonymous
  94. College Algebra~ Check answer please

    Can someone check my answers please. The formula for calculating the amount of money returned for an initial deposit into a bank account or CD (certificate of deposit) is given by A=P(a+r/n)^nt A is the amount of the return. P is the principal amount

    asked by Alicia
  95. social studies

    how did the cotton gin affect production?

    asked by angel
  96. law

    How long is the term for a federal Circuit Judge? I can't seem to find the answer anywhere.

    asked by Anonymous
  97. Math

    Could you help me with this problem? -2 5 Sorry couldn't type the problem correctly. The problem is 5 to the negative 2. I got 0.04 is the answer. Is this correct. Thank you.

    asked by Plse Help
  98. English- textual history

    What does it mean to research a textual history of a work? i.e. Hamlet's textual history

    asked by Nelson
  99. algebra

    solve the following using substitution 8x-4y=16 y=2x-4 8x-4(2x-4)=16 8x-8x+16=16 0x+16=16 so what do i do now?

    asked by Christi
  100. math

    when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees? I really need an answer!!!!!!!

    asked by robert
  101. social studies

    how did places like Saratoga Springs, Montauk Long Island, Lake Erie and Seneca falls get their names?

    asked by kenny
  102. AP Chem

    i always get the error analysis section of my lab wrong so i need a NON human error in an experiment involving the diffusion of gases Experiment: stick cotton ends of a Q-tip (one soaked in HCl and one in NH3) into either end of a drinking straw and

    asked by Blair
  103. pre alg.

    In a pattern, the # of colored tiles used in row x is 3 to the power of x. Find the number of tiles used in rows a, 5, & 6. i don't get this problem & could use some help...

    asked by Anonymous
  104. science

    how does the constellation make stuff?

    asked by karisha
  105. S

    What are some ways we can decrease destruction, fragmentation, or degradation of habitats?

    asked by dawn
  106. social studies

    what is the difference between the kind of information presented by current newspapers and historic newspaper?

    asked by kyesha
  107. SCI 275

    What are some alternatives to destroying tropical rain forests, which may be reducing nature’s ability to replace its species?

    asked by dawn
  108. social studies

    how is the information in newspapers organized?

    asked by malik
  109. S

    What are some ways we can decrease destruction, fragmentation, or degradation of habitats?

    asked by dawn
  110. social studies

    explain the two basic way you can look for information on the internet.

    asked by malik
  111. pre alg.

    In a pattern, the # of colored tiles used in row x is 3 to the power of x. Find the number of tiles used in rows a, 5, & 6. no one has responded to my question yet

    asked by Anonymous
  112. social studies

    which web sites often have more dependable information than other sites?

    asked by malik
  113. Chemistry

    A gas fills 80ml at 740mm. what volume will it have at standard pressure? Stuck on this problem. Please Help. Thanks

    asked by Maggie
  114. math

    when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees This is my answer? Is this right?

    asked by robert
  115. math

    what is an example of a commutative propery of addition

    asked by maddie
  116. Optimization - Calculus

    Find the point closest to the line sqroot(X+1) from the point (3,0). d = [(x - 3) + (y - 0)]^1/2 d = [(x - 3) + (y)]1/2 Do I now substitute in the equation y = sqroot(X+1) and solve?

    asked by Anonymous
  117. pre-alg

    In a pattern, the # of colored tiles used in row x is 3 to the power of x. Find the number of tiles used in rows a, 5, & 6. i don't get this problem & could use a little help, plz!

    asked by kathryn
  118. Physics Lab

    Hello, we are doing a lab dealing with diffraction gratings. The problem I have is that we are supposed to find the number of slits, N, based on gathered information. I have x, L, d, m, and w, just not N, which is what I am trying to find. I also have the

    asked by McPhysics
  119. algebra 1 :(

    The height of a triangle is 8m less than the base. the area is 10m^2. Find the height and base. I really need help on just turning this word problem into an equation!

    asked by nicole
  120. calc

    find dy/dx when x = csc y

    asked by joo
  121. history

    what are the main influences on central America & the Caribbean countries? a)Aztecs & Mayas b)ecotourism & communism c)the spice trade & shipping d)colonialism & slavery

    asked by kathryn
  122. Physics

    An alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the object?

    asked by Anonymous
  123. physics

    n alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the objec

    asked by Anonymous
  124. Chemistry

    Which of the following molecules has polar bonds and is nonpolar? HF ICI3 NF3 SF4 BF3

    asked by Lauren
  125. English

    Hi, I need to cite a source for a paper but I cant tell whether its a paper or an article or an article from a journal or book. Can you please help. "title of work" author from jump cut, no 27, July 1981, pp 27-32 copyright Jump Cut: A review of

    asked by English Urgent Help
  126. une lab de physics

    Hello, we are doing a lab dealing with diffraction gratings. The problem I have is that we are supposed to find the number of slits, N, based on gathered information. I have x, L, d, m, and w, just not N, which is what I am trying to find. I also have the

    asked by URGENT
  127. history

    What do most countries in middle & south America have in common with the U.S.?? How are they different?? i could use some help with this question, plz

    asked by kathryn