Questions Asked on
February 12, 2009

  1. physics

    a remote controlled car's wheel accelerates at 22.4 rad/s^2. if the wheel begins with an angular speed of 10.8 rad/s what is the wheel's angular speed after exactly 3 full turns?

    asked by luke
  2. Please Help Fast

    A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mL mark on the neck of the flask was reached. The flask was then shaken until

    asked by anonymous
  3. Chemistry

    is CH3CH2N or NO2 a lewis acid?

    asked by Anonymous
  4. Chemistry

    Consider a .900 M Al(NO3)3 solution. This solution has a nitrate ion concentration of:

    asked by Chris
  5. Chemistry

    How many grams of NaC2H3O2 (M=82.034 g mol-1) should be dissolved in 400 g of water to prepare a solution which is 11.28% NaC2H3O2 by mass?

    asked by Chris
  6. Reiny! Reiny! Reiny! Answer Check and HW Help!

    Translate to a system of equations and solve: 1) The sum of two numbers is 36. One number is 2 more than the other. Find the numbers. Answer: (17,19) 2) Find two numbers whose sum is 66 and whose difference is 18. Answer: (37,29) These ones I am not sure

    asked by Britney
  7. 9th grade

    A 5-kg rock is lifted 2 meters in 5 seconds. How much work is done? How much power is done?

    asked by Lindsey
  8. social studies

    How did the geography of ancient Greece cause it to separate into independent communities?

    asked by Shan
  9. chemistry: equations and reactions

    identify the products when the following substances decompose: 1) binary compoound 2) metallic hydroxide 3) metallic carbonate 4) the acid H2SO3

    asked by Stephanie
  10. physics

    I'm not sure how to solve this..a baseball is popped straight up into the air and has a hang-time of 6.25s. Determine the height to which the ball rises before it reaches its peak.

    asked by jona
  11. world geo

    An isthmus is a narrow strip of land located between two water bodies that connect two larger land areas.find a central american country that is an isthmus. i do not know how 2 answer this question:( please please help:) thank u

    asked by eleny
  12. physics

    need HELP!! which of the following exhibits parabolic motion a. stone thrown into a lake b. space shuttle orbiting Earth c. leaf falling from a tree d. train moving along a flat track which of the following does NOT exhibits parabolic motion a. frog

    asked by y912f
  13. Stoichiometry Test

    3.Empirical formula is C4H5N2O.Its molecular weight is 194.19g/mole.The "empirical formula weight is about 97.1g/mole.What is the molecular formula ?

    asked by Cool Dom
  14. Stoichiometry Test

    What is the percentage of oxygen in____? Mg(OH)2

    asked by Cool Dom
  15. chemistry

    the thing that is troubling me is that NO2 is not (NO2)- does that change it from being considered a lewis base to a lewis acid?

    asked by Anonymous
  16. Chemistry HELP!

    A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mL mark on the neck of the flask was reached. The flask was then shaken until

    asked by anonymous
  17. Intermediate Algebra Word Problem

    A map's key indicates that 3/4 of an inch represents 60 miles. How many miles does 2 1/4 inches represent? in/mi 3/4 / 60 = 2 1/4 / x 3/4x = 60(2 1/4) .75x = 60 (2.25) .75x/.75x = 135/.75 x = 18mi. Is this correct?

    asked by Jennifer
  18. Chem 12

    Given the two reactions: 5Fe2+(aq) + MnO4-(aq) + 8H+(aq) --> 5Fe3+ (aq) + Mn2+(aq) + 4H2O(l) 2MnO4-(aq) + 5C2O42-(aq) +16H+ --> 2Mn2+(aq) + 10CO2(g) + 8H2O(l) A.) Which reaction will occur at a faster rate? B.) Explain the reason for this result by

    asked by Sam
  19. math

    the roots of 2x^2 - 3x = 4 are a and b. find the simplest quadratic equation which has roots 1/a and 1/b

    asked by isha
  20. chem

    An aqueous solution of nitric acid has a density of 1.084 g mL-1 and a measured concentration of 2.580 molar. What is the percent weight of nitric acid in the solution.

    asked by Patty
  21. organic chemistry

    in a reaction with 9-fluorenol and sodium hypochlorite (with acetic acid) that is supposed to yield 9-fluorenone, what could be a possible reason for error if the solution of 9-fluorenol, sodium hypochlorite, and acetic acid was heated too high? (around 80

    asked by Anonymous
  22. Geography

    Name a large bay east of maine?

    asked by Anonymous
  23. Stoichiometry Test

    4.A compund is found to have(by mass)48.38% carbon,8.12% hydrogen and the rest oxygen.(What % is missing to make the sum 100 %?) That is,figure % oxygen.What is its empirical formula?

    asked by Cool Dom
  24. algebra

    when the temperature stays the same, the volume of the gas is inversely proportional to the pressure of the gas. If a balloon is filled with 87 cubic inches of a gas at a pressure of 14 pounds per square inch. Find the new pressure of the gas if the volume

    asked by tonya
  25. sociology perspective

    Every four years in the United States there is a presidential election, and after the election, nearly half the population readily accepts the leadership of the person for whom they did not vote. This is an example of: egalitarian authority charismatic

    asked by dean
  26. Pre-Cal (verifying trig identities)

    How would you verify the identity? sin^1/2x-cosx-sin^5/2xcosx=cos^3xradsinx

    asked by Crystal
  27. Algebra

    Write a system of inequalities to describe the shaded area of the graph. This is the question on my homework today that i just don't get. My teacher said to use point slope form. y=y1+m(x-x1) The coordianate points of the triangular area are line 1:

    asked by Katy
  28. Chemistry! Please Help!

    What mass of propanoic acid, CH3CH2COOH, pKa= 4.87, should be dissolved in water to 2.00L volume in order to produce a pH of 2.50? THANKS! -J

    asked by Jude
  29. math

    How do you find the definite integral of an absolute function? ∫_0^3|2x-3| lower limit= 0 upper limit = 3

    asked by Stephen
  30. Quick Spanish

    Complete the sentence with an appropirate adjective. Follow the model. modelo: David es un chico 'trabajador porque le gusta trabajar los sábados y domingos. 1. Nosotros somos los estudiantes más_______________del señor Unamuno. Please help with this

    asked by Larry
  31. Math-Algebra

    i don't understand how to graph an equation. can anyone help me please? i'll greatly appreciate it. Example: 3x+4y=12

    asked by Amy
  32. Spanish

    Fill in the brackets with a correct definite or indefinite article. 1. Nosotros somos (los) estudiantes de Buenos Aires. 2. Ellos son (los) amigos de Gisela. 3. Ustedes son (unas) personas estudiosas e inteligente. 4. Tu eres (el) hombre de Vallodolid. Are

    asked by Larry
  33. math

    does anyone know how to do pizzazz worksheets, i'm having trouble with mine.

    asked by alex
  34. SCI 245

    Discuss in 200 to 300 words, the importance of the science of geology to us as a civilization. Give at least two examples. For example, the ability to predict earthquakes and other disasters, or understanding mining and the use of natural resources

    asked by troyer0269
  35. Engineering

    Determine the required nominal diameter of a threaded steel rod to carry an axial load of 16,000 pounds in tension if the tensile stress of 20,000 psi is permitted.

    asked by David
  36. Math

    Which example is a function and which is not? Explain why. 1. Each student takes a selection of art classes. 2. Each student is placed in a math class. Please Help!! Thank You so much!!

    asked by Happy Face!
  37. Chemistry!! Please Help!

    What mass of propanoic acid, CH3CH2COOH, pKa= 4.87, should be dissolved in water to 2.00L volume in order to produce a pH of 2.50? THANKS! -J

    asked by Jude
  38. 5th grade

    The Texas state dish is chili. Alexi made 6 quarts of chili and served it at a party. He had 1/3 of the chili leftover. How many quarts did he have left? I can't figure this out! Please help, my math worksheet is talking about equivalent fractions!

    asked by asia
  39. science

    Why do most streams in NY state have a greater stream discharge runoff in spring than in summer? 1 Potential evaporation and transpiration is greater in spring than in summer. 2 More transpiration occurs in spring than in summer. 3 Most area of NY state

    asked by Anonymous
  40. juvenile justice

    What are the major differences between the contemporary criminal (adult) justice system and the juvenile justice system? Are the major differences appropriate, given the differences between adults and children? Explain your answer.

    asked by susan
  41. chemistry

    how much heat is absorbed if 200g of water changes from 20 C to 80 C?

    asked by Renita
  42. art history help please!

    If you could please check these and just let me know which ones are correct! also if you have any input on a better answer, or atleast where i can find a better answer, i would greatly appreciate it! This artist painted scenes of upper-class recreation:

    asked by jeffery
  43. computers

    2. Final Project: Bead Bar Systems Development Project • Resources: Appendix A, Information Systems Technology • Due Date: Day 7 [Individual] forum • Plan a systems development project for the Bead Bar, using the seven standard systems development

    asked by Anonymous
  44. college

    the relationship between the dosage, x, of a drug and the resulting change in body temperature is given by f(x)=x squared(4-x) for 0 greater than or equal to x greater than or equal to 4. make sign diagrams for the first and second derivate and sketch the

    asked by Olivia
  45. science

    measurement of an average classroom door is closest to 1 meter

    asked by dj
  46. Chemistry!!

    At what initial concentration would a solution of acetic acid (ka=1.8x10^-5) be 2% ionized? THANKS! -J

    asked by Jude
  47. 6th grade

    where can i get help with the geometric shapes

    asked by daniel
  48. math

    can anyone help me with this problem? 6x-5y+20=0

    asked by Nidia
  49. Unscramble a word

    Can you unscramble these two valentines words for me? IENGTGER, AND RMIEDAR

    asked by Sarah
  50. Chemistry

    At what initial concentration would a solution of acetic acid (ka=1.8x10^-5) be 2% ionized? I am stuck. Thanks -J

    asked by Jude
  51. Physics

    A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot was in view for a total of 0.37 s, and the top-to-bottom height of the window is 2.20 m. How high above the window top did the flowerpot go? S= ut +(1/2)at^2 S=

    asked by Andrew
  52. Precalculus

    what is the area of a pastry used to cover a slice of bery pie having outer crust arc of 7.6 cm and a central angle of 30 degrees? My answer: 661.88 cm sqr Answer: 55.2 cm sqr Thanks.

    asked by Tri
  53. government

    What determines who holds the postion of speaker of the house?

    asked by bri
  54. chemistry

    can you check if I did the problems correctly? thanks! a soln of NaOH is prepared by dissolving 5.0g of NaOH in 500mL of water, the nadding additional water to make 1.0 L of soln. What is the pOH and pH of this soln? [OH-]=(5g/40g)mol/1L pOH=-log(1/8)=.90

    asked by Anonymous
  55. statistics

    I don't understand how to answer this: relate the three measures of central tendency to a normal distribution- I looked it up online and it said that the mean, median, and mode are all the same but i don't understand how that can be

    asked by katie
  56. statistics

    How do ethics affect your chosen level of significance? I am not sure if I understand what the instructor is wanting can some look at my answer and see if I am close and if I am missing something Answer: The level of significance to my understanding is

    asked by JOHN
  57. 5th grade

    how do you write a ten paragraph essay?

    asked by katy
  58. chemistry -IMPORTANT-

    we have to make an instrctinal packet showin relationships between moles and concentration. i cant find the following 1)how is the number of moles dissolved in a set amount of solvent related to the molarity? 2)how to determine the amount of solvent in

    asked by lyne
  59. math

    (dy/dx)=X^3/8 - 1/2x^3. what is sqrt( 1+(dy/dx)^2 ) and that multiplied by (dy/dx)

    asked by jesse
  60. art

    does anyone know where the yellow cow painting by Franz Marc i displayed?

    asked by sophie
  61. science

    As the temperature of soil decreases from 10 degree celcius, what will most likely happen to the infiltration rate of water through it? please help i have no idea about it. thank you.

    asked by Anonymous
  62. To Stephanie -- Com130

    I've removed your post because it doesn't apply to the Jiskha forum. We have no way of reading your peer's posts on any Axia board. Please repost with your ideas about proposal writing and we'll be glad to critique them.

    asked by Ms. Sue
  63. science

    As redioactive material decays and the percentage of new material in the original sample increases, does the age of the sample substance increase, decrease, or remain the same?

    asked by kerri
  64. chem

    how do you prepare a solution using the proper lab equipment(both from dry solid and a stock solution) i researched it but all i found was the definition for stock solution any help please!!

    asked by lyne
  65. college

    How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another

    asked by linda
  66. important operations

    simplify (2x+3)(x-4)= HELP !!

    asked by gamefrog
  67. algebra

    How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions?

    asked by linda
  68. college

    I need a full sentence outline on a thesis. The thesis is "Although children are taught the basics in school there needs to be more emphasis on the lower grades to be susre children who have difficulties are discovered early to get the help needed to stay

    asked by Anonymous
  69. math

    if the ones digit ofa numbre greater than 1 is 0, what factor or factors must that number have? a.2 only b.5 only c.2 and 5 d.neither 2 or 5

    asked by Carol
  70. homework

    where can I find more information on the stages of the general adaptation syndrome?

    asked by Malkia
  71. math

    what would the antiderivative of e^-2x be? and if the antiderivative of that is -1/2e^-2x, what would that antiderivative be?

    asked by Lauren
  72. chem

    A water solution which contains magnesium chloride as the only solute measured 232 parts per million chloride on an analytical instrument using a specific ion electrode as the sensor unit. When converted to moles per liter what value would you get for the

    asked by Patty
  73. science

    measurement of an average classroom door is closest to 1 meter

    asked by dj
  74. Intermediate Algebra Solve

    x + 1 / x = 3/2 x + 1(2) = 3x 2x + 2 = 3x -2x -2x 2/1 = 1x/1 2 = x Is this correct?

    asked by Jennifer
  75. Stoichiometry Test

    THIS TEST IS DUE IN 15 MINS AND I JUST NEED HELP ON HOW TO DO IT LIKE THE STEPS FOR THEM ??

    asked by Cool Dom
  76. Biochemistry

    I need to copare and contrast gel electrophoresis and paper strip electrophoresis... I know what both of them are, but I need to explain in terms of the charges on the proteins.. and I need to describe the polyacrylamide gel electrophoresis method in terms

    asked by Andrew
  77. Algerbra

    Help please show steps to solve. Two records and three tapes cost $31. Three records and two tapes cost $29. Find the cost of each records and each tape. No examples to guide me. thanks, Carol

    asked by Carol
  78. Science

    If a block could be molded into a flatter and longer shape, then which one would happen and can you explain? a. mass, volume, and density all would change. b. volume would change, but the mass and density would remaine the same. c. mass and volume would

    asked by rachel
  79. Algebra

    i need help on my homework. how can i graph this equation? y-3=0

    asked by Kia
  80. Chemistry

    At what initial concentration would a solution of acetic acid (ka=1.8x10^-5) be 2% ionized? Thanks

    asked by Needs help, please!
  81. 9th grade algebra

    how do you solve and graph variable inequalities?

    asked by ryan
  82. Maths

    State the minimum or maximum value of Y and the corresponding value of X of Y=9-(2X-1)^2. Hence sketch the curve, indicating the Y-intercept. Thank you a lot in advance.

    asked by Zeba
  83. social studies

    what natural resources made portland a good location for a city?

    asked by stacey
  84. Algebra

    Suppose that x = 2-t and y = 4t+7. a. If x=7, what is y? b. If x=-3, what is y? c. Find y in terms of x. I don't know how to solve this, since x and y are in different equations. Could you please walk me through it? Thanks!

    asked by Olivia
  85. Engineering

    5. Two pieces of steel are held together with six bolts. One end of the first piece of steel is welded to a beam and the second piece of steel is bolted to the first. There is a load of 54,000 pounds applied to the end of the second piece of steel. The

    asked by David
  86. college

    What is the molecularity of the elementary reaction? SO_3(g)-->SO_2(g)+O(g)

    asked by s1175
  87. Intermediate Algebra Simplify

    Simplify: this is a triple decker fraction 1/a + 1/c divided by a^2 - c^2 divided by ac I am stuck on this one please help.

    asked by Jennifer
  88. law of motion

    the strongest fundamental force.

    asked by Sam
  89. Math

    How long one can hold their breath can be calculated using the formula y=1.4g where y is the amount of time one can hold their breath in seconds and g is the size of their lungs in cubic centimeters. Is this a relation or a function? Explain why. Please

    asked by ~{HAPPY FACE!!}~
  90. Math

    Which example is a function and which is not? Explain why. 1. Each student takes a selection of art classes. 2. Each student is placed in a math class. Please Help!! Thank You so much!!

    asked by ~{HAPPY FACE!!}~
  91. spelling

    analogy for fly that has four letters

    asked by westin
  92. english

    can anyone find me chapter summaries for the book "the sturdy oak" please

    asked by sam
  93. Intermediate Algebra Solve

    Solve: -1/3 - 5/4t = 3/4 - 1/6t would I cross multiply? (-1)(4t) - (3)(5) = (3)(6t) - 4 I am stuck here, please help.

    asked by Jennifer
  94. Algebra

    I am thinking of a number.It is a multiple of 3 but not 6.It is greater than 25^2 but less than 30^2.The units digit is a perfect square and the sum of the other two digits is the square root of 81. What is my number? A three-dimensional model of a city

    asked by Christina
  95. Algebra 2

    Can someone helpe me solve this equation . Help me break it down please..becuase i have tried to do it mnay times but have fallen short... [SQRT(x + 3)] - [SQRT(x - 2)] =1

    asked by George
  96. SOSE

    WHY DID THE 1962 AVALANCH OF PERU HAPPEN

    asked by ALEX
  97. math

    how do I simplify? (secө/ (secө-tanө)) - secөtanө

    asked by kayla
  98. lit.

    persue:contract::

    asked by elisha
  99. math

    how do u solve x+3=0? its very confusing.

    asked by Jessica
  100. math

    x+5=-3

    asked by jr
  101. chemistry

    A student adds 1.00x10^-8 moles HCl to a liter of soln. The resulting soln will be acid, basic, neutral, or impossible to determine? I believe that it is impossible to determine, because it does specify that the temperature was at 25*C. Which of the

    asked by Anonymous
  102. physics

    1.if frequency increases twice, how it change the energy carried by one pulse? (It may have no effect) 2. if the humidity of the air increased, what quantities will be affected: frequency, period, speed, and wavelength

    asked by jaden
  103. math

    how do I do this? I think I have to simplify it? (sin^2ө + cos^3ө/sinө + cosө)+ sinөcosө

    asked by maggie
  104. physics

    which is the X axis and which is the y axis. Is there a way to remember it?

    asked by d
  105. Science

    How can you divide a mixture of iron and iron sulphide, without using a magnot?

    asked by Karla
  106. math

    (dy/dx)=X^3/8 - 1/2x^3. what is sqrt( 1+(dy/dx)^2 ) and that multiplied by (dy/dx)

    asked by jesse
  107. art

    i am doing a project about franz marc an i need some info on one of his animal paintings this info consists of: name: when it was made: how it was made: what it was about: does it tell a story: what is in it: is it happy sad boreing etc: how you feel: and

    asked by sophie
  108. AED

    help please... 350- to 500-word response to the following: You have the ability to choose three or four books for your students. Based on what you have learned in this course, how can you assess the level of bias and stereotypes in the contents of these

    asked by troyer0269
  109. math

    A base raised to a NEGATIVE exponent is equivalent to _______________.??? plz help me with the word. thanks.

    asked by Anonymous
  110. sociology

    G. William Domhoff's view of the power structure of the United States most closely resembles the analysis of which sociological perspective? Functionalist perspective Conflict perspective Interactionist perspective Global perspective it isnt conflict, or

    asked by dean
  111. PHYSCIAL EDUCATON

    ANALYZE THE EMERGENCE OF PROFESSIONAL SPORT?

    asked by MUNIR
  112. repost chemistry

    A student adds 1.00x10^-8 moles HCl to a liter of soln. The resulting soln will be acid, basic, neutral, or impossible to determine? I believe that it is impossible to determine, because it does specify that the temperature was at 25*C. I know that a

    asked by Anonymous
  113. social studies

    Portland, Oregon sorry

    asked by stacey
  114. stats!

    Abe looked at fundraising over the last decade. In the six seasons where the football team won less than 40% of the games (losing seasons) Abe was only able to raise an average of $1.2 million in contributions to the Athletic Department (adjusted to

    asked by Peter
  115. Healthcare

    I need some help with find information on what are the implications for patients? What types of reform efforts are being implemented to improve caregiver’s socialization skills?

    asked by Kia
  116. French

    Can someone tell me if these sentences are all grammatically correct? Merci! elle serait contente de nous conduire au magasin le 8 avril. Nous pouvons y emmener deux personnes.

    asked by MJ
  117. science

    Where does convergent motion take place?

    asked by Emily
  118. 205 ctr

    Sure, I’ve heard that it’s better to not eat cheeseburgers every day, but it’s extra protein and protein is good for you.

    asked by chris
  119. 205 ctr

    It’s disgraceful that a member of the Elks Lodge would go out to fast food restaurants every night. The Elks believe in family values, including home-cooked meals.

    asked by christina
  120. math

    x + 5 > 9 =

    asked by anmol
  121. psy210

    where can I find more information about the steps of general adaptation syndrome?

    asked by Malkia
  122. math

    Can you explain this to me please? sin2 A + cos2 A = 1 ... (1) 1 + tan2 A = sec2 A ... (2) 1+ cot2 A = cosec2 A ... (3)

    asked by Anonymous
  123. Stoichiometry Test

    Thanks Damon i got a couple more lolz 2.Determine the formula mass of (NH4)2C4H4O6

    asked by Cool Dom
  124. Chemistry

    At what initial concentration would a solution of acetic acid (ka=1.8x10^-5) be 2% ionized? Thanks Responses Chemistry - DrBob222, Thursday, February 12, 2009 at 10:00pm Let's call acetic acid HAc. Then the ionization is HAc ==> H^+ + Ac^- We will call the

    asked by Chemistry - Repost for DrBob222
  125. Math

    please explain to me how to figure out what fraction is greater. ex. 5/6 __ 1/8

    asked by Kate
  126. math

    what is one fifth of 123570

    asked by leosha
  127. uop

    : Reflect on your own worldview and compare it with the worldviews presented in the text. Provide examples of the benefits of your view to defend your position.

    asked by brandy
  128. Math

    How long one can hold their breath can be calculated using the formula y=1.4g where y is the amount of time one can hold their breath in seconds and g is the size of their lungs in cubic centimeters. Is this a relation or a function? Explain why. Please

    asked by Happy Face!