Questions Asked on
January 30, 2007

  1. Chemistry check

    Could someone please just check my answers for this? I want to make sure I did these right. 1. A student reported the mass of ten glass beads as 2.507 +/- 0.015 g. What should the student report as the mass of one bead? Explain your answer. A: The student

    asked by Bryant
  2. Chem II

    2.5 mol NOCl(g) was placed in a 2.50 L reaction vessel at 400 degrees C. After equilibrium was established, it was found that 28% of the NOCl had dissociated according to the equation: 2NOCl(g)2NO(g)+Cl2(g) Calculate the equilibrium constant, Kc, for the

    asked by Rick
  3. World History

    what is the danger of Lenin's idea of party leadership? Lenins idea of party leadership was dangerous because in such a corrupt system, a party was terrible for the local environment. Many people would fight for the top leadership position. thanks. why did

    asked by Dennis
  4. proverb

    What is the meaning of this proverb?: "He who is afraid of the leaves must not go into the forest." Maybe it has the same meaning as she who fears rejection should never fall in love. Sometimes to reach our goals we have to overcome the fears in reaching

    asked by Anonymous
  5. Physics... Please help me

    A shell is shot with an inital velocity of 20m/s at an angle 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment whose speed is immediately after the explosion zero falls

    asked by Brian
  6. Physics

    100000W of power is delivered to the other side of a city by a pair of power lines with the voltage difference of 15000V. a) how much current flows in the lines? 100000/15000 = 6.9 A b) Each of the 2 lines has a resistance of 10 ohms. What is the voltage

    asked by Belle
  7. unscramble

    what is anldegn unscrambled Try England

    asked by Anonymous
  8. Chemistry? Q's

    Which of the following elements is chemically similar to Oxygen? a. flourine b. nitrogen c. Sulfur d. Hydrogen Which of the following is smallest? a. proton b. electron c. neutron d. nucleus The number "a million trillion" can also be written as 1015 True

    asked by A student who needs help
  9. science

    A shell is shot with an inital velocity of 20m/s at an angle 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment whose speed is immediately after the explosion zero falls

    asked by Brian
  10. Physics... Please help me

    A shell is shot with an inital velocity of 20m/s at an angle 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment whose speed is immediately after the explosion zero falls

    asked by Brian
  11. algebra3

    can u solve the equation 1)1.2x= 2.3x-2.2 2)[x-4]= 15 3)[13+2x]= 5 1) 1.2x = 2.3x - 2.2 2.2 = 2.3x - 1.2x 2.2 = 1.1x x = 2 2) x - 4 = 15 x = 15 + 4 x = 19 3) 13 + 2x = 5 2x = 5 - 13 2x = -8 x = -8/2 x = -4 it's all about getting the same variables to the

    asked by WOLF
  12. Social Studies

    Witch country brought basball to the central american countries? Who brought slaves to the central american countries? Witch Country brought The religan Roman Cathlic to the central american countries? witch country brought ecomic aid to the central

    asked by Nate
  13. someone correct my work please? fun, fun chemistry

    Okay. I'm very, very confused. The initial question is: predict the products of the electrolysis of a 1 mol/L solution sodium chloride. This is my work: The four different possible equations are: 2H2o + 2e- -------> H2 + 2OH- (V= -0.83) O2 + 4H+ + 4e-

    asked by Rienna
  14. physics

    As you look out of your dorm window, a flower pot suddenly falls past. The pot is visible for a time t, and the vertical length of your window is L_w. Take down to be the positive direction, so that downward velocities are positive and the acceleration due

    asked by nick
  15. Physics

    A 0.165kg cue ball with an inital speed of 2 m/s bounces off the rail in a game of pool. For x and y axses located the counce reverses the y component of the ball's velocity but does not alter the x component(the angle is 30 in the negative x axis and it

    asked by Brian
  16. chemistry

    how do i calculate %of arsenic and oygen by mass and chem composition of the oxide that has been formed 0.702 sample of arsenicheated, material in boat, oxide of arsenic with mass of 0.927g please help %As = [(mass As)/mass oxide]x100=?? %O = [(mass

    asked by mickey
  17. Science

    The speed of sound in a gas depends upon the average speed of the gas molecules. Why is such a relationship reasonable? The greater the density of the medium ie gas pressure, temperature, the better sound traves through it. Why? because there are more

    asked by Lacy
  18. odd and even functions

    Using f is odd if f(-x) = -f(x) or even if f(-x) = f(x) for all real x, how do I 1)show that a polynomial P(x) that contains only odd powers of x is an odd function 2)show that if a polynomial P(x) contains both odd and even powders of x, then it is

    asked by Jen
  19. chemistry

    what is the atomic number of ununhexium and the full symbol is this a transitional element that is a metal and what is its highest hydride and highest fluoride of ununhexium thanks What is known about Uuh can be found here. Look for element number 116. Go

    asked by mickey
  20. chemistry

    what evidence supports the clarification that H2Se 03 is an acid and how do i identify the positive ions present inthe aqueous solution I am a little confused by the word "clarification" in your question. What evidence do you have? Could you measure the pH

    asked by mickey
  21. math-PLEASE HELP ME!

    # of words: 36 72 108 144 180 216 # of sec: 10 20 30 40 50 60 PLEASE HELP ME!!!!!!!

    asked by jennie
  22. Science

    Does increasing the frequency of a wave also increase its wavelength? If not, how are these quantities related? high frequency. low wavelength That answer may be confusing. A high frequency has a short wavelength; i.e., 14 MHz is about 40 meters. 28 MHz is

    asked by Tammy
  23. Chemistry

    Why are combustion reactions always exothermic? Is it just because it gives off heat? Thanks ahead of time Exothermic MEANS it gives off heat; therefore, I don't think that can be a reason. Think of wood burning. Magnesium strips burning. A wax cancle

    asked by Mercedes
  24. research paper

    Does anyone know what arguments could come from nuclear energy? An argument for nuclear energy is that it is more efficient than coal or gas for generating electricity. There are more reasons in favor of it, of course. An argument against it is the

    asked by sam
  25. chemistry

    write a balanced chemical equation for the reaction of aluminium selenide with water (to include physical states of reactants and products)to include brief decription of the strategy used and the sequence of partially balanced equations needed to reach

    asked by rikki
  26. Social Studies

    Why did Thutmose III try to get rid of everything that had to do with Queen Hatshepsut? Because he envied her and hated her and stuff, and because he wanted to be the only ruler, not to rule aside Queen Hatshepsut. I looked it up in a book. You should too!

    asked by Julia
  27. Science

    Under what circumstances, if any, will a converging lens form an inverted image of a real object? Under what circumstances, if any, will a diverging lens forms an erect image of a real object?

    asked by Mae
  28. criminology

    Can someone help me think of physical, environmental, and social factors that might affect criminal behavior. Any websites would be greatly appreciated.

    asked by jeff
  29. Physics

    A 75 kg man on a 39kg cart traveling at a speed of 2.3 m/s. He jumps off with zero horizontal speed realative to the ground. What is the resulting change in the speed of the cart? I tried using m1v1=m2v2 but that didn't work out since I was expose to get

    asked by Brian
  30. math

    Use the table to estimate how long it took Stella Pajunas to type 100 words # of words: 36 72 108 144 180 216 # of sec: 10 20 30 40 50 60 Its a nice linear line, so no statistical estimation technique required. For every 10 seconds, Stella can type 36

    asked by Susie
  31. Math(Count Iblis PLease help me again)

    5y^8 - 125 *you have to factor completley 5y^8 - 125 = 5(y^8 - 25) = 5(y^4 + 5)(y^4 - 5)= 5(y^4 + 5)[y^2 + sqrt(5)][y^2 - sqrt(5)]= 5(y^4 + 5)[y^2 + sqrt(5)]* [y + 5^(1/4)][y - 5^(1/4)] good work, good explaination

    asked by Margie
  32. Geog

    How many minutes does it take for the earh to rotate through 1 degree of longitude? The earth has 360 degrees of longitude. It rotates every 24 hours. There are 1440 minutes in a day. Divide 1440 by 360 to get your answer.

    asked by mike
  33. College Algebra

    Goemetry Find the area of a triangle whose altitude is 7 ft & whose base is 22 ft. Complete each sentence. Can anyone help me.... Isn't the area of a triangle 1/2 the base times the altitude?

    asked by Ana - confused
  34. Bus.Law

    Why are formal legal rules alone not an aclequate ethics system for business? Society is based on ethics systems as well as formal rules. This applies to businesses and individuals. In the long run, a business is hurt and loses customers if it's shown to

    asked by mike
  35. factoring

    a^2-2ab-15b^2 a^2-2ab-15b^2 = (a - b)^2 - 16 b^2 = [a - b + 4 b]* [a - b - 4b] = (a + 3b)*(a - 5b)

    asked by lelani
  36. Chemical

    Which is the theoretical effusion of NH3 and the theoretical effusion of HCl? The rate of effusion is proportional to 1/(square root of the molar mass).

    asked by Geisha
  37. Exploring Quadratic Graphs

    ok, I totally did not get this question at all. Complete each statement. Assume the variable a does not equal 0. a. The graph of y=ax^2+c intersects the x-axis in two places when ______. b. The graph of y=ax^2+c does not intersect the x-axis when ______.

    asked by Emily
  38. reading

    does anyone know the climax of Stuck in Neutral by Terry Trueman? please help me!

    asked by Ginger
  39. Equivalent Fractions

    what or how do you get at least one equivalent fraction 1/4 = ___ what about 30/120 ? I don't know.. How did you get that? Multiply the numerator and denominator by the same number. 1/4 = 2/8 = 3/12 = 4/16 = 5/20 If you multiply the numerator and

    asked by Joseph
  40. Chemistry

    Can someone explain the different gas laws to me(Boyle's, Charles, and Avogadros)Thanks There are links to each in this article

    asked by Chrissy
  41. humanities

    give examoples of cultural valves in art form

    asked by Anonymous
  42. chemistry check

    What is the sum of the coefficients (including “1”) of the following reaction? Sodium sulfate + calcium hydroxide ??? Na2SO4 + Ca (OH)2 --> 2 NaOH + CaSO4 a. 4 b. 5 c. 6 d. 7 e. 9 the sum of coefficients are = 1 + 1 + 2 +1 = 5 Goodness, you add the

    asked by key
  43. internationa business

    I need to know where can I find information about nike organization. Are Nike production facilites centralized or edcentralized?, Does Nike standardize products or adapt them for different markets?, Thank you for using the Jiskha Homework Help Forum. Here

    asked by dre
  44. A Tale of Two Cities

    In Cahpter 3 " A disappointment" What was the evidence that was in Darnay's handwriting? I really recommend that you read that chapter, in fact I recommend reading the whole book.... it is GOOD! Here is a site that will help you.

    asked by Gina
  45. Science

    What types of waves can be refracted? Under what circumstances does refraction occur? When a wave travels from one medium to another in which the refractive index is different. Air to glass, for example, or glass to air. air to water or water to air.

    asked by Tindy
  46. Math 4 (Count Ibilis)

    Solve by factoring: One of the solutions to the quadratic equation 2x^2 - 9x – 5 is -1/2. What is the other solution? 2x^2 - 9x – 5 = (2x + 1)(x - 5) So, it's x = 5.

    asked by Margie
  47. Science

    I don't noe ne thng about fluids. test is in two days If you repost your question and spell the words right, I'll help you. lol pwnT

    asked by Sana
  48. Geog

    if each time zone is 15 degrees in width who many time zones are there around the earth? Simple math problem. There are 360 degrees around the world. Divide 360 by 15.

    asked by mike
  49. Geog

    why does each time zone extend 7 1/2 degrees oneach side of central meridian rather than extending from 0 degrees to 15 degree? Please tell us what you think, and we'll be glad to critique your answer. i have no idea ..

    asked by mike
  50. algebra

    In most businesses, increasing prices of products can negatively impact the number of customers. A bus company in a small town has an average number of riders of 800 per day. The bus company charges $2.25 for a ride. They conducted a survey of their

    asked by Anonymous
  51. physics/biology

    Determine the number of uncompensated ions (both total number and as a percentage of the bulk ions) required to establish a charge of 100mV across a membrane of a spherical cell that is 25 ƒÊm in diameter. Assume that the total number of ions inside and

    asked by Ann
  52. math/What is a interval in math terms?

    doe sanyone know what a interval is in math terms? i need the real definition and it is hard and i can not find it anywhere? can anyone help me? thanks,you rule Kayla an interval is "a mathmatical expression of 'betweeness' a---------b or a

    asked by Kayla
  53. dr.bob222

    when you get a small little chance can you check my math in last message i posted. thank you. I read the post earlier but didn't post a response because I was confused by the c in the formula.

    asked by Jasmine20
  54. Math2

    Factor: 2xy – xz + 2wy – wz (x+w)(2y-z)

    asked by Margie
  55. algebra3

    can u graph the inequality in a coordinate plane 1)y>3x-1 2)-x>2

    asked by WOLF
  56. History

    Can one explain to me what was the outcome of the Greeks revolt against the Ottoman Turks.. and the outcome of when charles X tries to set up an absloute monarchy in France.. Thanks in Advance.... Thank you for using the Jiskha Homework Help Forum. The

    asked by Bryan
  57. Geog

    In one minute of time how far does the earth rotate in minutes or seconds of longitude? Please use the answer I posted in my last answer to calculate this answer.

    asked by mike
  58. Geography

    If you left New Orleans ( 30 degrees N, 90 degrees W) at 4:00 am on Friday Dec. 31, and traveled for 12 hours before arriving in Baku, Azerbaijan ( 40 degrees N, 30 degrees E) , at what time and on what day would you arrive in Baku? ( show work pleas)

    asked by matt
  59. SPORTS

    What does these colleges have in common... Samford, Georgia, Marshall, Illinois State, Murray State, Cincinnati, UTC besides the same sports? Your question is unclear. Stanford and the others may all be higher education insitutions in the United States. I

    asked by Cindy
  60. Chemistry

    Hello, please could someone help? Will calcium chloride (CaCl) granules be a suitable drying agent for drying hydrogen selenide (H2Se) gas? Or, will the calcium chloride granules also absorb the H2 from the H2Se? Thank you. Calcium chloride is CaCl2. It is

    asked by Junior
  61. algebra

    7 -y _____ Y - 7 Does this factor to 1???? Assuming that the two Ys (y and Y) indicate the same unknown, it would be -1. (7 - Y)/(Y - 7) = -1(Y - 7)/(Y - 7) The (Y - 7) terms cancel each other out, leaving -1. I hope this helps. Thanks for asking.

    asked by deborah
  62. English

    Literature during this period (1840-1860 "The American Renaissance) is permeated by the doctrine of individualism. Explore the expression of individualism in the work of one of these figures: Ralph Waldo Emerson, Henry David Thoreau, or Emily Dickinson. is

    asked by Missa
  63. Science-mixtures

    How do you separate sand from salt in a homogeneous expeiriment? Add water to dissolve the NaCl, pour through a filter paper. The sand will be in the paper. Dry to recover the sand. Evaporate the water separately to recover the NaCl.

    asked by ashley
  64. Modern World History

    Can some one explain to me the ouctome of this action dealing with ethe uprising in Europe. Action: French citizens' armies with their revolution for liberty and equality. Who fought in the French and Indian War?

    asked by Bryan
  65. ethics

    Need Major differences and commonalities apparent between Mexican Americans and Puerto Ricans Thank you for using the Jiskha Homework Help Forum. The first site will give you information about the different areas of the U.S. where they tend to live:

    asked by sue
  66. math

    What polygon has 20 diagonals?I don't know how to figur this out. THANKS!!!! A rectangle (4 sides) has 2 diagonals. A hexagon (6 sides) has 3 diagonals. An octagon (8 sides) has 4 diagonals. A _____ (20 sides) has 20 diagonals.

    asked by cole
  67. Langusage Arts

    My 4th grades needs HELP with (Show the possession of the subject.)the car of the principals The principal's car principal's shows that the car belongs to the principal.

    asked by J.R.G.
  68. Chemical

    How i make a graphic about Pressure v/s 1/Volume? Make a table with two colums. Column 1 contains Pressure. Column 2 contains volume. P   1/V ------------------ Then place values of P and 1/V. Then plot those numbers. I can't draw it on the

    asked by Geisha
  69. Geography

    Explain the purpose of a key on a map The key lets you know what the symbols mean. For example a little tree may mean a state park. A picnic table and tent may mean a campgroung with a picnic area.

    asked by cindy
  70. math-PLEASE HELP!!!!!

    Use th etale to estimate how long it took Stella Pajunas to type 100 words # of words= 36 72 108 144 180 216 # of secs.= 10 20 30 40 50 60 You can see from the table that the relation is exactly linear. One word takes 10/36 seconds, 100 words takes 1000/36

    asked by Samantha
  71. science

    What is the phase of neon at room temperature? This will give you all the information you ever wanted about Ne. Click on element #10

    asked by T
  72. rhetoric

    What is the role of rhetoric in influencing people's attitudes and beliefs? How can readers distinguish between prejudicial and non-prejudicial use of rhetorical devices? Please check out the following posts and links: Posted by Ms. Sue on Tuesday, June

    asked by julie
  73. expressing as odd & even functions

    Express P(x) = x^5 + 6 x^3 - x^2 - 2x + 5 as the sum of an odd function and even function. Podd(x)=x^5 +6x^3- 2x Peven(x)= -x^2 + 5

    asked by Jen
  74. math,correction

    can someone correct this for me please. Directions: Evaluate each function for the value specified. f (x)=x^2+7c+10, f (-2) so then this is what i did: f(-2)=-2^2-7(-2)+10 = 4+14+10 = 28 so then that means that f(-2) = 28 sorry the formula should read.

    asked by Jasmine20
  75. Language Arts/ English

    Henry Wadsworth Longfellow, James Russell Lowell, Oliver Wendall Holmes and John Greenleaf Whittier belong to the group known as the fireside poets. Your book states that "the fireside poets wrote for a family audience, usually on subjects of general

    asked by Missa
  76. Help me!

    What are the most significant similarities between the Chinese American and Japanese American (cultural) experiences? What are the differences? (Schaefer, 2006, p.352) Choose from any of the following topics when considering similarities and differences:

    asked by Letitia
  77. algebra

    Identify the period and amplitude of each function. y=3cosÈ y=-2cos2t y=2cos1/2t

    asked by Natasha
  78. Math 3

    Solve by factoring: One of the solutions to the quadratic equation x^2 - 13x + 30 is 3. What is the other solution? Is it:(x+3) If 3 is a solution, then the quadratic contains a factor (x-3). The other factor is thus (x-10), and it follows that the other

    asked by Margie
  79. Geography

    A traveler leaves Lima, Peru ( approximately 12 degrees S. Lat. And 90 degrees W. long.) at 8:00 am on Tues. Oct. 3rd and travels for 14 hrs before arriving in Sydney, Australia ( approx. 34 degrees S and 150 degree E). what time and what day would the

    asked by matt
  80. math,help

    What does it mean to factor an algebraic expression into prime factors? Prime factors are factors that cannot be further factored. Do you know what a interval is in math terms? i need the definition yeah so what do you mean it should be put in help not

    asked by jasmine20
  81. Conic Sections

    How do you find the equation for this problem? Conic Center(1,3) directrix x =7 snd corresponding focus (3,2)

    asked by Bob
  82. algebra

    -5k + 15 _________ k2 - 9 Does this facot to -5(K+3) _______ k^2 -9 Is this right? Nope. You have to factor the denominator to (k+3)(k-3) The numerator you factored should have been -5(k-3), you missed a sign.

    asked by deborah
  83. ethnics

    What is a current issue between Native Americans and the federal government. What legislation is linked to the issue, and why you think there is a connection. You can look into many of these linked

    asked by Anonymous
  84. algebra

    help me use the number 'e' as a natural base. You have to be much more specific. This question cannot be answered, it is very general. Any number can be used as a base, including 10, commonly used in the US. Can you walk me through this problem:

    asked by amanda
  85. Geometry

    Find x in terms of y e-zgeometry. com/pow/pictures/25.gif It would be helpful if the verticies had letters at the site you left: The two smaller triangles are similar to the larger one (the altitude y)

    asked by Seth
  86. computers

    what happens if the hotfix you are installing is older than the systemscurrently installed service pack?

    asked by shaylkj
  87. chemistry

    why is the molecular formula of oide of arsenic in its gaseous state is not neccessarialy the same as its empirical formula what does this mean and how do i do it Molecules are known to dimerize or trimerize. We actually don't know what the molecular

    asked by donald
  88. social studies- articles of confederation

    what can the congress do Lots of information here. =)

    asked by christine
  89. rate law expressions

    could anyone tell me a good website that teaches how to find rate law expressions? thank you!! I hope this helps. It will get you started, anyway.

    asked by confusedstudent
  90. geometry

    draw a diagram to explain how it is possible for 2 central angles to be congruent, yet their corresponding minor arcs are NOT congruent. Please help! thanks! (3z-5)degrees (5z-47)degrees Find the value of z and m

    asked by marco
  91. algebra

    6x +2 _____ 8 Reduce ??? Is it 2x+1 ____ 4 Am I doing this right? Correct.

    asked by deborah


    asked by JAYLEE
  93. chem

    how is the oxide of arsenic worked out when its in its gas state please help im flumuxed Please clarify your question? What do you mean by "worked out? the question states determine the molecular formular of the oxide of arsenic when it is in its gaseous

    asked by donald
  94. Math Help

    3x^2 + 17x + 10 *I really don't get this but you have to factor completley. (3x+2)(x+5) thanks. - can you help me with my other problems.? I'll take a look. I'll have more time in about 2 hours from now. ok. - but I don't have that long can you try to help

    asked by Margie
  95. life

    what is boredom??? and why do i have it doing homework??? You can find the answer by tyoing my name in google :) The short answer is that you wouldn't need to do homework if you could download everything you need to know directly into your brain.

    asked by sam
  96. math HELP PLEASE!!!!!

    Use the table to estimate how long it took Stella Pajunas to type 100 words # of words: 36 72 108 144 180 216 # of sec: 10 20 30 40 50 60 it would take 27.2 seconds. youre welcome

    asked by Aj
  97. geometric mean

    what is the ngeometric mean of 4 and 4 by definition, sqrt (4*4) or 4 how do you find the geometrical mean of a right triangle?

    asked by sam
  98. algebra

    Reduc x^3 - x^2 ___________ x^4 Is it x-1 _____ x^2 Is this right? yes

    asked by deborah
  99. algebra

    8a + 8b _______ 12c + 12d factor to a + b _______ c + d Is this right? No, what happend to the 8/12 ? would it be 2 (4a + 4b) _____________ 6 (2c + 2d) Is this right??? No. what about ..lets see, 8/12 reduces to 2/3, so 2(a+b)/3(c+d)

    asked by deborah
  100. English

    Can a fable have gods that are directly involved with the plot of the story? Are all fables really short and not descriptive? Fable: A short moral story, often with supernatural or animal characters. Remember in the Old

    asked by samantha
  101. sats

    what are the topic the students are doing for their englsih sats rather than macbeth Whenever you have questions about AP tests and/or SATs, you can go to and wander around until you find answers. I found this:

    asked by laiba

    noone is helping.Please help me. - get a life. YOu posted the question 15 min ago. We don't just sit here waiting for questions.

    asked by Margie
  103. chem please help

    when the oxide of arsnic is heated it sublimes and becomes a gas at 650oc and a pressure of 690mmHg the 0.927g sample of the oxide has a volume of 194cm calculate the volume in cm3 that the sample would have at 0oc and 760mmHg(ie at STP)if it were to

    asked by john
  104. math

    what is the percent of 7 over 10 (7/10)x100=70% 7 - 10 or 70 - 100

    asked by nick