Popular questions and responses by bb
  1. Language Arts

    What is the topic sentence of this paragraph from life without gravity?

    asked on October 6, 2017
  2. physics

    A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball approaches the cushion with a velocity of +2.30 m/s and rebounds with a velocity of -1.90 m/s. The ball remains in contact with

    asked on November 11, 2013
  3. Chemistry

    what is the Ka for ethylammonium cation,C2H5NH3^+, at 25 celsius?(Kb for C2H5NH2=4.7x10^-4 at 25 Celsius)

    asked on March 21, 2013
  4. English

    Please help me come up with some ideas for this, need to find appeals to emotion and appeals to reason In "All Together Now," Jordan uses Appeals to emotion and appeals to reason to try to persuade her readers that her views are important. In a paragraph,

    asked on December 3, 2018
  5. AP Chemistry

    Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation is given below. C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 (a) What mass of acetic anhydride is needed to completely consume 4.40 102 g

    asked on August 30, 2010
  6. chemistry

    A 0.12-mole sample of nitrogen gas occupies a volume of 2.55 L. What is the volume of 0.32 mol of nitrogen gas under the same conditions?

    asked on December 9, 2011
  7. math help

    A number game is played with a number cube and a number line. The figure shows a number line. The numbers on the number line range from negative 10 to 10 in increments of 1. When it is your turn, you roll the number cube twice. The first roll tells you how

    asked on October 9, 2019
  8. Astronomy

    The great galaxy in Andromeda has an angular diameter along its long axis of about 5 degree. Its distance is about 2.2 million light years. What is its linear diameter?

    asked on March 29, 2010
  9. Physics help please!!!

    In February 2004, scientists at Purdue University used a highly sensitive technique to measure the mass of a vaccinia virus (the kind used in smallpox vaccine). The procedure involved measuring the frequency of oscillation of a tiny sliver of silicon (just

    asked on March 29, 2012
  10. chmistry

    3O2(g)---> 2O3(g) Delta H = +284.6 kJ what is the sign of delta G and delta S

    asked on February 5, 2013
  11. Chemistry

    the ka of hypochlorous acid hclo is 3.5 x 10^-8. What is Kb for the hypochlorite ion?

    asked on March 21, 2013
  12. Physics help

    A light rope is wrapped several times around a large wheel with a radius of 0.435 m. The wheel? A light rope is wrapped several times around a large wheel with a radius of 0.435 m. The wheel rotates in frictionless bearings about a stationary horizontal

    asked on February 27, 2012
  13. college

    The expected number of heads in 160 tosses of an unbiased coin is ___.

    asked on September 14, 2009
  14. Physics

    3. Calculate the amount of gravitational potential energy at the top of each hill and at the bottom of each valley. Be sure to convert your distance measurements to meters.Use an approximated value of 58.0 g for the mass of the tennis ball, and 9.81 m/s2

    asked on February 25, 2018
  15. Math

    Suppose you take out a 45​-year ​$100,000 mortgage with an APR of 6​%. You make payments for 2 years ​(24 monthly​ payments) and then consider refinancing the original loan. The new loan would have a term of 20 ​years, have an APR of 5.9​%,

    asked on April 18, 2019
  16. plagiarism workshop

    Now that you have developed an in-text citation for a summary, paraphrase, and a direct quote, and created a reference for the paragraph provided in Exercise 2, reflect on the thought processes you used for each aspect. How did your approach differ when

    asked on May 12, 2011
  17. math

    Sarah has a collection of nickels, dimes, and quarters worth $9.25. She has 10 more dimes than nickels and twice as many quarters as dimes. How many coins of each kind does she have?

    asked on July 13, 2015
  18. Physics

    Suppose you used a 300 Hz tuning fork to produce resonant frequency in a tube whose diameter is 3.0 cm. At what length of the tube will you the resonant frequency if the air temperature inside the tube is 25 C. Assume that the tube is closed at one end.

    asked on November 18, 2017
  19. physices

    A sound wave has a wavelength of 3.0 m.? The distance from a compression centre to the adjacent rarefaction centre is:

    asked on February 4, 2013
  20. chmistry

    a solutiona solution is made by dissolving 3.75g of a pure nonvolatile solute in 95g of acetone. the boiling point of pure acetone was observed to be 55.95 Centigrade that,and that of the solution was 56.50 Centigrade.if the molar boiling point elevation

    asked on November 20, 2012
  21. business

    how to do Legal Research for this Issue Employment Discrimination 2. Textbook reference: Chapters 5, 35 3. Possible search terms: ethics, employment discrimination, Title VII, past discrimination 4. Here is the situation: ABC Corporation decides to respond

    asked on November 28, 2011
  22. chemisty

    I have to convert the following pressures into torr: 1. 2.48x10^-3atm 2. 4.75x10^6atm 3. 7.60x10^6 i have no idea how to convert it when there are scientific notations involved. please help =]]

    asked on March 6, 2010
  23. Math

    You want to purchase a new car in 8 years and expect the car to cost ​$21,000. Your bank offers a plan with a guaranteed APR of 5.5 % if you make regular monthly deposits. How much should you deposit each month to end up with ​$21,000 in 8 ​years?

    asked on April 18, 2019
  24. Chemisrty

    Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25°C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in mole fraction of

    asked on December 1, 2011
  25. chemistry gas laws

    In a science demonstration, 4 to 6 plastic garbage bags are arranged under a 2 m by 2 m piece of plywood. A volunteer stands on the plywood and others blow into the bags to "levitate" the volunteer. If four bags are used and a 140 lb person is on the

    asked on December 4, 2006
  26. a person stands on a bathroom scale that rest on t

    a person stands on a bathroom scale that rest on the floor of an elevvator. when the elivetor is stationary the scale registers 50kg. when the lift acclelerates up ward the scle registers 60kg .taking g=10m/s^2, the best estimate acceleration of the lift

    asked on February 4, 2013
  27. Chemistry

    A sample of gas at 57C and 1.02atm occupies a volume of 2.20L. What volume would this gas occupy at 107C and 0.789atm?

    asked on March 27, 2016
  28. Retailing

    The steps in a retail strategy are: A. interdependent of each other. B. independent of each other. C. organized by specific and then general factors. D. organized by short- and then long-term factors.

    asked on August 25, 2016
  29. permutations and combinations

    Four men and four women are to be seated alternatively at a round table. In how many ways can this be done?

    asked on January 2, 2006
  30. chemistry

    What is the molar solubility of silver carbonate, Ag2CO3?

    asked on November 9, 2016
  31. MATH

    you have 4 blue crayons, 2 red and 3 orange, what is the probablity of pulling a red crayon and then an orange without replacement?

    asked on December 10, 2010
  32. Chemistry

    Compare the diffusion rates of hydrogen and oxygen gases.

    asked on March 27, 2016
  33. science

    A student needs to mix 50 ml. of glycine with 950 ml. of distilled water. This student has only a 25 ml. graduated cylinder. How many times will the student have to use the cylinder both glycine and water to prepare the solution?

    asked on July 5, 2015
  34. Chemistry

    A sample of gas is collected by water displacement. The atmospheric pressure in the room is 757mmHg and the vapor pressure of water is 17.5mmHg. What is the partial pressure of hydrogen under these conditions?

    asked on March 27, 2016
  35. Comm. Arts

    Toulmin Model and Campus Gun Control? I'm getting really confused about this. I need to break down an article according to the toulmin model within the next few hours. It's about gun control on campuses. So far I've got: Claim: Guns should be allowed on

    asked on March 24, 2008
  36. uop

    Choose some numbers and work in a small group to figure out how to apply the tests for divisibility by 4, 6, 7, 8, 9, and 11 given on pp. 211–214. a. Use a calculator to select some numbers that are and some that aren’t divisible by these numbers. Give

    asked on December 8, 2010
  37. chemistry

    In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B. How many molecules of substance B are produced when 26.5 g of substance A reacts? The molar mass of substance A is 21.9 g/mol. Step 1: Convert the mass of A

    asked on September 24, 2013
  38. algebra2

    Suppose it takes 3 days for a space vehicle to travel from Earth to the moon. About how long would it take for the same vehicle traveling at the same speed to Jupiter? Moon - 240,000 mi Jupiter - 391,000,000. The space vehicle would take how many days to

    asked on February 2, 2008
  39. extraction

    How to distingush organic layer and aqueous layer? The organic layer is the one on top. Most organic solvents are less dense than water. (NOte: Non-hydrocarbons such as chloroform, methylene chloride, carbon tetrachloride etc are more dense than water.)

    asked on August 21, 2007
  40. chemistry

    h2s + HNO3 -->s+ no+H2O balance by oxidation number change

    asked on February 14, 2013
  41. algebra

    What is the common denominator? 3 2 - + - 1 a-1 ------- 4 3 - - - 1 a+1

    asked on January 30, 2008
  42. geometry

    A parallelogram ABCD has perimeter equal to 124. Let E be the foot of the perpendicular from A to BC, and let F be the foot of the perpendicular from A to CD. If AE=7 and AF=24, what is the area of the parallelogram?

    asked on March 12, 2013
  43. Insurance Forms

    I need help with a few questions. Could you let me know if I'm going in the right direction. 1- CHAMPVA would be considered a primary payer for a patient who has ______ coverage. A- Medicaid B- fee-for-service C- Medicare D- SSI Answer: A 2- You should

    asked on March 15, 2011
  44. Algebra HELP:(

    I am terrible at word problems. How do I work this? A large park is to be built in the shape of a rectangle. The length is to be 5 m shorter than three times the width. The perimeter of the park is to be 750 m. What will be the length and width of the

    asked on June 8, 2010
  45. Algebra

    The denominator of a fraction is 2 less than twice the numberator. If the numerator is decreased by 2 and the denominator is increased by 3, the resulting fraction simplifies to 1/3. Find the original fraction. Have no idea what to do.

    asked on February 5, 2008
  46. Chemistry

    A sample of gas at 57oC and 1.02atm occupies a volume of 2.20L. What volume would this gas occupy at 107oC and 0.789atm?

    asked on March 27, 2016
  47. com 155

    Write a 100-word passage to Susan Anker, the author of the course’s textbook, in which you describe five details from her book that are good and five details about the book that are written well.

    asked on September 26, 2010
  48. Chemistry

    What is the percent ionization of a solution prepared by dissolving 0.0286mol of chloroacetic acid, in 1.60L of water?for choloroacetic acid, Ka=1.4x10^-3

    asked on March 22, 2013
  49. chmistry

    balance each of the following chemical equations ,using the change in oxidation number method. cu +h2so4=cuso4+so2+h2o

    asked on February 14, 2013
  50. Genetic engineering and Gene splicing

    what's the difference between genetic engineering and gene splicing?

    asked on May 23, 2011
  51. algebra


    asked on December 15, 2007
  52. Chemistry

    what is Kc at 25 celsius for the following equilibrium? CH3BH3^+ +H2O CH3NH2 + H3O^+ Kb=4.4x10^-4 I got 4.0x10^4 / 1.0x10^-14 = 4.0x10^-10 (correct)?

    asked on March 22, 2013
  53. math

    List all the subsets of S. You may use "C" for chocolate, "V" for vanilla, and "M" for mint. 1. {} 2. C 3. V 4. M 5. CV 6. CM 7. VC 8. VM 9. MC 10.MV 11. CVM Is this correct.

    asked on April 15, 2010
  54. Physics

    A Car moving North at 9 m/s strikes a stationary car of equal mass. The first car moves off after the collision at an angle of 30 degrees West of North, with a speed of 6 m/s. What is the speed of the second car after the collision? My resources have poor

    asked on September 18, 2014
  55. math

    Describe what happens to the three points of concurrency that determine the Euler line when the triangle is (a) isosceles, (b) equilateral.

    asked on January 24, 2010
  56. language arts

    I am looking for a word that discribes this. This makes a room messy, carries a sick person, or is another name for a lot of puppies.

    asked on August 18, 2008
  57. algebra

    is this right? Divide and check: 12x^3y^2/2x^5y^2 answer: 6x^-2

    asked on February 6, 2008

    1. What volume of O¬2(g) is consumed in the combustion of 50.0 L of butane (C4H10) if both gases are measured at STP?

    asked on March 29, 2018
  59. algebra

    Is this correct? subtract (4a^3+2b^3)-(6a^3+5a^2b-2ab^2+2b^3) answer: -2a^3-5a^2b+2ab^2

    asked on February 6, 2008
  60. algebra

    Factor c^2+3c-54 v^2-4v-21

    asked on February 6, 2008
  61. government

    When the Court decides a case, it bases its decision on

    asked on February 21, 2015
  62. geometry

    find "d" in the radical form of a right square pyrmid with equilateral triangular faces. I have three measurements of 8.

    asked on June 16, 2010
  63. Algebra: did I do this right

    find the other endpoint of a line segment with the given midpoint (6,4) endpoint ((3, 5). 6= 3/2 and 4 = 5/2 12=6 and 8 = 10 12-6 and 8 - (-10) End Point = (6, 18)

    asked on June 8, 2010
  64. college

    Two parallel plates, each with zero mass and an area of 10,000 cm2 are set 0.1 mm apart and the space between them is filled with a Newtonian fluid. The upper plate is pushed in the direction shown with a constant force sufficient to accelerate a mass of 1

    asked on March 28, 2010
  65. algebra

    The length of a rectangle is 9 in. more than twice its width. If the perimeter of the rectangle is 48 in., find the width of the rectangle. a) 4 in b) 5 in c) 6 in d) 7 in

    asked on January 10, 2008
  66. algebra

    Rewrite the equation 2x-3y=-6 A) f(x)=2/3x+2 b) f(x)=3/2x-3 c) f(x)=3/2x-6 d) f(x)=2/3x+6

    asked on January 10, 2008
  67. Health

    The difference between dysthymic disorder and major depressive disorder is that ________. A. Symptoms of Dysthymic disorder are usually less severe than those of major depression B. Symptoms of Dysthymic disorder are usually shorter than those of major

    asked on July 23, 2015
  68. phy

    calculate the work done on the system when 1.00mol of gas held behind a piston expands irreversibly from a volume of 1.00dm cube to a volume of 10.0dm cube against an external pressure of 1.00 bar

    asked on March 4, 2015
  69. economics

    What is the effective marginal tax rate of a government antipoverty program that guarantees every family a minimum income? Explain. Why might trying several antipoverty benefits to income level lead to an effective marginal tax rate of greater than 100

    asked on November 22, 2014
  70. geometry

    If a quadrilateral has 4 congruent sides and congruent diagonals. Could it immediately be concluded to be a square?justify the answer. If not was is a counterexample

    asked on March 30, 2011
  71. algebra

    Find the slope and y-intercept x=-9 a) slope:0;y-intercept: (0,-9) b) slope: undefined; y-intercept: (0,-9) c) slope: 0;y-intercept:none c) slope: undefined;y-intercept:none

    asked on January 15, 2008
  72. algebra

    Write the equation of the line passing through (2,-3) and (2,4). Write the answer in slope-intercept form.

    asked on December 9, 2007
  73. SOC120: Introduction to Ethics & Social Responsibi

    The ethical emotivist would most agree most which statement?

    asked on March 9, 2015
  74. math

    While performing a calculation, you divide a number by 5 two times to get the answer 12. You should have divided by 5 only once. What is the correct result of the calculation

    asked on December 1, 2010
  75. algebra

    Theater tickets are $8 for general admission and $5 for students. During one evening 240 tickets were sold, and the receipts were $1680. How manny of each ticket was sold? This is what I have before I get stuck: G=8 S=5 8(240-S)+5S=1680 1920-S+5S=1680 Now

    asked on December 26, 2007
  76. Chemistry

    Explain the relationship between the various properties of gases including pressure, temperature, volume, amount of gas, molar mass, and particle speed.

    asked on March 27, 2016
  77. math

    Solve for x: 3x − 5 = 2x + 6.

    asked on October 27, 2015
  78. math

    Find the age, to the nearest month, of the people in your class. Use the average age in months as your zero and positive and negative numbers to write the age of each person in relation to the average. Work in a group to find a good visual way to display

    asked on December 13, 2010
  79. math

    suppose square was not a word used in mathematics. How would you descibe the shape that the word represents?

    asked on November 10, 2010
  80. Biology

    I need help with a couple of questions. I have included what I think the answers are. Could you let me know how I did? 1- A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results show an elevated

    asked on September 8, 2010
  81. Health

    I was wondering if anyone could help me with these questions. I have put what I feel are the correct answers. Please let me know if I did ok & thanks. 1- A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood

    asked on September 8, 2010
  82. Chemistry

    I have to convert the following pressures into torr: 1. 2.48x10^-3atm 2. 4.75x10^6atm 3. 7.60x10^6 i have no idea how to convert it when there are scientific notations involved. please help =]]

    asked on March 6, 2010
  83. literary

    you can mix things in it, hold briks together with it, or fire it.

    asked on August 18, 2008
  84. algebra

    (8x-6) - (4x-5)

    asked on March 31, 2008
  85. geography

    Is there a certain rhyme out there to help study state capitals?

    asked on January 24, 2008
  86. algebra

    Solve the system by graphing. x+y=4 -x+y=2 How do I graph this?

    asked on January 10, 2008
  87. Algebra 1

    Solve the following system by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent. 10x+2y=7 y=-5x+3

    asked on December 27, 2007
  88. algebra

    Solve the following by graphing: 2x - y = 4 2x - y = 6

    asked on December 26, 2007
  89. English

    Serious is to careful as nervous is to____________

    asked on September 11, 2011
  90. algebra: please check

    p/3-3p/8=3 p-3p/8=9 p-3p=72 -316 I am not sure if I did this right. Just guessing.

    asked on June 10, 2010
  91. physics

    I am getting 0.144 nm for this but I didn't make use of the force. Do you have to use the force? A force of 4.6 x 10-15 N acts between an electric dipole with dipole moment 2.3 x 10-29 C m and an electron. How far away from the dipole is the electron

    asked on February 6, 2010
  92. algebra

    f(x)=x2(squared)-7x+10, find (a)f(0), (b) f(5), and (c) f(-2)

    asked on December 15, 2007
  93. english

    please help me unscramble this word hippayen Try these: =)

    asked on December 21, 2006
  94. physices

    A sound wave has a wavelength of 3.0 m.

    asked on February 4, 2013
  95. algebra 1

    simplify the following fractions by rewriting them in factored form and finding all the "ones" you can....plis help.. 42/60, 16/80, 51/17, 7/33...

    asked on September 19, 2010
  96. algebra

    Is this right if I substitute -2 for x? f(x)=x^2-7x=10 f(-2)=-2^2-7(-2)+10 f)-2)=-4-(-14)+10 f(-2)=-8

    asked on December 15, 2007
  97. calculus

    f(x) = (3x^3+5x^2+8x-8)/x find the derivative

    asked on January 31, 2013
  98. calculus! please help

    simplify tan^2 theta + 1/ tan^2 theta csc2 theta –1 ~ tan2 theta ~ 1

    asked on May 27, 2012
  99. math

    ã10(ã11-ã7) can you help me multiply and simplify

    asked on October 13, 2010
  100. math

    ã10(ã11-ã7) can you help me multiply and simplify

    asked on October 13, 2010


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