Questions Asked on
July 6, 2010

  1. chemistry

    Calculate the pH for each of the following solutions: (a) 0.10 M NH3 (b) 0.050 M C5H5N (pyridine)

    asked by G
  2. Physics

    A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?

    asked by Anonymous
  3. chemistry

    thanks Dr.Bob, I got that question. I also have another question that I am having trouble on. I am being asked to arrange the oxides in each of the following groups in order of increasing basicity: (a) K2O, Al2O3, BaO (b) CrO3, CrO, Cr2O3 I know the

    asked by G
  4. Science - Physics

    A meter stick is balanced at the 50-cm mark. You tie a 20-N weight at the 20-cm mark. At which mark should a 30-N weight be placed so that the meter stick will again be balanced?

    asked by Jen
  5. Physics

    "An airplane is climbing at an angle of 15 degrees to the horizontal with the sun directly overhead. The shadow of the airplane is observed to be moving across the ground at 200 km/h. How long does it take for the plane to increase its altitude by 1000 m"?

    asked by Stuck
  6. business law

    Ruth carelessly parks her car on a steep hill, leaving the car in neutral and failing to engage the parking brake. The car roles down the hill, knocking down an electric line. The sparks from the broken line ignites a grass fire. The fire spreads until it

    asked by Kristy
  7. Phosphorus cycle

    Explain how the phosphorus cycle differs from the carbon cycle. The phosphorus cycle differs from the carbon cycle by the phosphorus being an essential element in molecules which carries energy to plant and animal cells. The phosphorus helps plants with

    asked by Amanda
  8. chemistry

    Rolaids consumes 47 times its weight in excess stomach acid. Can this be tested using quantitative measurements?

    asked by wesley
  9. Economics - Please Help

    Suppose the economy has been producing its potential, but it is now experiencing a recession. Which of the following is a discretionary fiscal policy that would bring the economy closer to its potential output? Check all that apply. 1) A tax cut 2) A tax

    asked by BC
  10. Physics

    A force vector F of magnitude 12N is applied to a FedEx box of mass m2=1kg. The force is directed up a plane tilted by theta=37 degrees. The box is connected by a cord to a UPS box of mass m1=3kg on the floor. The floor, plane, and pulley are frictionless,

    asked by Rick
  11. Allied Health

    What is a doctor’s responsibility if a patient requests restrictions on the use of his or her PHI? A. The doctor must comply with the patient’s wishes. B. The doctor need not comply with the patient’s wishes if HIPAA would otherwise permit

    asked by Jessica
  12. Physics

    A -4.0-µC charge is located 0.30 m to the left of a +6.0-µC charge. What is the magnitude and direction of the electrostatic force on the positive charge?

    asked by Marie
  13. Nitrogen cycle

    explain how the phosphorus cycle differs from the nitrogen cycle. The phosphorus cycle does not exist in a gaseous state and does not enter in the atmosphere. It cycles from land to sedimants in the ocean and back to land. The nitrogen cycle exists is a

    asked by Amanda
  14. geometry

    A pizza is cut into 10 equal slices. What is the measure of each central angle (the part first eaten)?

    asked by zacarra
  15. Chemistry

    Uranium hexafloride is a solid at room temperature, but it boils at 56C. Determine the density of uranium hexafloride at 60C and 745 Torr.

    asked by Victoria
  16. Carbon

    #1 where and in what form does carbon enter long term stores? It enters long-term stores in the form of Carbon dioxide, and is found in intermediate and deep ocean waters. On land, it is found in coal-deposits and in oil and gas deposits. #2 where and in

    asked by Amanda

    SPARTAN. Which atom (a, b, c, d, e, f, g, h) in the haloacetic acid below has the maximum electrostatic potential? i cant copy the picture A. a B. b C. c D. d E. e F. f G. g H. h we all know we have the same one... just whats the answer????

    asked by Anonymous
  18. algebra II

    Suppose a car door lock has a five-button keypad. Each of the buttons includes two digits. How many different five-button patters are possible?? (Hint: Each button can be used more than once.)

    asked by Lola
  19. Example of Carbon

    Give an example in which carbon moves from the abiotic to the biotic part of an ecosystem. An example which shows that carbon moves from the abiotic to the biotic part of an ecosystem is it being in the atmosphere and getting removed by producers which

    asked by Amanda
  20. geometry

    Which is the area of a circle with a circumference of 37.68 units? (use 3.14 for pi)

    asked by Superman
  21. Food Web

    A food web contains green plants, rebbts, squirrels, mice, seed-eating birds, hawks, and owls. Which organisms in this food web would contain the greatest biomass? Explain KK. I don't know how to do this. I think that the green plants would contain the

    asked by Amanda
  22. chemistry

    4.The Kb of ammonia, NH3, is 1.8x10^-5. What is the pH of a 2.000 millimolar solution of ammonia , to 3 significant digits.

    asked by Samantha
  23. physics 2

    The electric field across a cellular membrane is 1.0x10^7 N/C directed into the cell. What is the magnitude of the electric forse on the sodium ion flowing into the cell? The charge on the sodium ion is +e.

    asked by mrs. austin
  24. English

    What are examples of Irresponsible Persuasion? Other than peer pressure

    asked by Jr.
  25. advanced math

    A train traveling at 460 watts from England by the circumference of the city of Wisconsin Rapids terminating an airspeed to ground rate ratio.In what city in France will the trains collide?

    asked by Alan Zamora
  26. Government Check

    What is the primary claim made by those who oppose hate crimes legislation? a)There is no way to catch all perpetrators of hate crimes, so all perpetrators should be punished equally. =b)There is no way to determine the motivations behind a crime, so all

    asked by Ariel
  27. economics

    If chocolate is found to have positive health benefits, would this lead to a shift in the demand curve or a movement along the demand curve

    asked by Anonymous
  28. Math 115

    Is the following set of numbers a perfect triple? 8, 10, 12. (2)Add -3/5+(8/35) (3).Which of the following are not like terms? (A)2b and 2b,(B)3c and 2c,(C)2b and 3b,(D)2b and 2c. Which number shown in parentheses is a soultion of the given equation?

    asked by Jerome
  29. PHL 251

    describe the role of critical thinking and language/language diversity in persuasion.

    asked by Denise
  30. surveying

    how to solve for radius of horizontal curve with coordinates(NE) for points A,B, C on the curve

    asked by Stacey Graham
  31. AP Biology for Kate, etc.

    To save your looking for these AP Biology sites, I now have ready: AP Central, AP Fees, Study Tips, Reviews, Test-Taking Tips, Practice Quizzes, Sample AP Bio Tests & Scoring Guidelines and books either to purchase or to find in a library. Just let me know

    asked by SraJMcGin
  32. Shelled marine organisms

    How do the shelled marine organisms contribute to the carbon cycle? They contribute to the carbon cycle by releasing carbon dioxide back into the atmosphere by converting carbohydrates and oxygen into carbon dioxide and water.

    asked by Amanda
  33. chemistry

    how many moles of HCl are needed to react with 2.3 moles of Zn in the following reaction? 2HCl + Zn --> ZnCl2 + H2

    asked by Anonymous
  34. math

    Calculate the volume of a sphere with a radius of 4.0 cm. Use pi=3.14 in your calculations. Assume the units are cm3 and do not include them in your answer. Round your answer to the nearest tenth.

    asked by moe
  35. General knowledge

    You are trapped in a room with two doors. One is to death and other lds to freedom. You don't know whic 1. There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.You can, however, ask one robot

    asked by evaa
  36. algebra

    please explaing reversing the digits. Find the product of 2 two digit numbers and reverse the digits and find the product. The products are the same. Does this happen with any pair of two-digit numbers? Eplain your thinking in solving this problem and

    asked by Robin
  37. Math

    Use a table of values of f(x) to estimate the value of the limit to four decimal places. lim_(x->-infinity)(sqrt(2 x^2 + 4 x + 1) - sqrt(2 x^2 + 2 x + 7)) 1

    asked by Stella
  38. chemistry

    2.Glycolic acid is often used in “facial peels” and has a Ka of 1.5x10^-4. If a movie star is to have a solution of pH 2.1 applied to her face at night, what concentration of glycolic acid solution should be made up (assuming that it is a monoprotic

    asked by GWM
  39. chemistry

    1.0 mol of nitrogen oxide NO and 1.0 mol of oxygen were mixed in a container and heated to 450 oC. At equilibrium the number of moles of oxygen was found to be 0.70 mol. The total pressure in the vessel was 4.0 atm. Calculate the value of Kp for the

    asked by jemy
  40. Math

    If 7y+9 represents an odd integer, which of the following represents the next smallest odd integer? a. 7(y-2)+1 b. 7(y-2) c. 7(y+3) d. 7(y+2) e. 7(y+1)

    asked by Anna
  41. surveying

    how to solve for radius of horizontal curve with coordinates(NE) for points A,B, C on the curve Point A : N1405.4018 E1256.7569 Point B : N1283.3703 E1294.7027 Point C : N1225.9373 E1286.6137

    asked by Stacey Graham
  42. Cycle question

    Is rock cycle also known as the phosphorus cycle? They are the same thing I'm guessing.

    asked by Amanda
  43. Algebra

    Hi, here is a question and my answer I have done so far, not sure about the end result so any help appreciated 5a-2 (5+4a)=-9 Multiply out brackets 5a-10+8a =-9 Add 10, 5a+8a=1 Collect like terms 13a = -9 Divide by 13 = a =1/13 I am pretty sure the answer

    asked by Sam
  44. MATH


    asked by ANNA
  45. Math 115

    I need some help on 2 anwers 1)is the following set of numbers a perfect triple? 8, 10,and 12. 2)Which pair of fractions is proportional (A)0.6/0.3=?3/18,(B)0.6/0.3=?2.4,(C)0.6/0.3=?2.4/1.8, (D)0.6/0.3=?3/15

    asked by Jerome
  46. chemistry

    How many grams of ammonia are formed when 1.34 grams of nitrogen react with an excess of hydrogen(3 H2 + N2 reacts to form 2 NH3)(Answer to tenths ex. 2.5)?

    asked by derek
  47. allied health

    I want to say D. Not sure here Which of the following is true in regard to limited data sets? A. Patients must authorize the use of limited data sets. B. Those who receive limited data sets can pass them on without restrictions. C. Limited data sets

    asked by james
  48. math

    if n is an integer and 3

    asked by Julie
  49. mat 101

    What would my balance be if I had $100 in a savings account that had a 2% interest rate and I kept the account for a 5 year period, using continuos compounding?

    asked by keith
  50. Products formed

    what are the products formed as a result of nitrification. What about dentrificiation. Nitrification = Nitrate Dentrification = Nitrogen gas

    asked by Amanda
  51. English

    Create a Topic Sentence where the blank space is. __________________________________________________________________. The goal of the Web Privacy Project is to make it simple for users to learn the privacy practices of a Web site and thereby decide whether

    asked by Jr.
  52. Math 115

    How do perform the indicated operation.15/13-13/15

    asked by Jerome
  53. math

    Victoria has two tea sets that are similar in size. The larger teapot is 12in tall and 6in wide. if the smaller teapot is 8in tall, how wide is it?

    asked by Tiffany
  54. math check answer

    Solve by elimination method 3x - 6y =4 3x - 6y =5 is the answer x=9 and I think it is inconsistant and not consistant

    asked by Christy
  55. algebra

    ms.sue, how would you solve the square-root of two manually, without a calculator?

    asked by Alisa
  56. geometry

    in triangle abc angle b is 3 times angle a and angle c is 8degrees less than 6 times angle a?

    asked by dj
  57. Nitrogen Cycle

    KK I know that the Nitrogen cycle is the way that nitrogen in nature is changed into many different forms that are used by living organisms, but I have to explain how the phosphorus cycle differs from that cycle, and I don't know about that. Is it possible

    asked by Amanda
  58. professiona education

    how good is a test?

    asked by michelle
  59. algebra

    media service charges $20 for a phone and $30/month for its economy plan. The equation C =30t + 20 decribes the total cost, C of operating a media service phone for t months. The total cost for two months of srvice is $_______.? If a customer has oly 90

    asked by Jim
  60. chemistry

    3.The solubility product for silver (I) chloride is 1.6x10^-10 while that for sliver (I) iodide is 8.5x10^-17. Suppose 5g of AgCl is put in a liter of 0.1M sodium iodide solution. If a solid is eventually isolated, what is it, and how did it form?

    asked by Cindy
  61. physics

    a man walks 12 m due noth , 4 m due east and finally climbs up a vertical pole up to a height of 3 m . find his displacement.

    asked by rucha
  62. Physics

    A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?

    asked by Anonymous
  63. Physics

    A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?

    asked by Anonymous
  64. Maths

    Hi, I have a formula for modelling the variation in population density in terms of distance from a town centre; y= -3x^2 +6x+9 where y represents the population density (in thousands per km^2) and x represents the distance (in km) from the town centre I

    asked by Mario
  65. Production and Operations management

    A ball bearing assembly firm wants to set up an assembly line which must have an output of 60 units per hour. The work elements are A to J and the task times are 40, 30, 50, 40, 6, 25, 15, 20, 18 and 30 seconds respectively. a. Determine the cycle time

    asked by Special
  66. law

    I am a bit confused about this question, can someone help please! What is unusual about a case involving res ipsa loquitor? A. The defendant assumes the burden of proof. B. The injury is usually caused by the plaintiff. C. An injury results even though no

    asked by linda
  67. Physics

    I have two different questions I can't figure out. 1) Projectile motion: At what initial speed must the basketball player throw the ball at an angle of 55 degrees above the horizontal, to make the foul shot? The horizontal distance from the ball to the

    asked by Pat
  68. business law

    The state legislature where Brighton was governor passed a statute giving him the power to nullify the Bill of Rights of the U.S. Constitution. Brighton exercised this power by eliminating the First Amendment. He then shut down all state newspapers that

    asked by Kristy
  69. Algebra

    Explain why x^2 +5x + 8 is prime(not factorable) How do you know? Give 2 examples of a prime polynomial(can't be both binomials) Give 2 examples of polynomials that are not prime(they can't be both binomials),factor them,explain what you did to factor

    asked by Jaz
  70. Chemistry

    0.37 moles of xenon gas (Xe) are captured in a 1.0-L container at 25 degrees celcius. Given the van der Waals constants for Xe, calculate the pressure of Xe gas inside the container?

    asked by Jordan
  71. Algebra

    decide whether the pair of lines are parallel,perpendcular, or neither. 4x + y = 8 3y - 4y = 10

    asked by Fred
  72. English Literature

    I need to write an essay about The Iliad and compare and contrast it to the current war on terror. Do you know any references I can research to help write my paper. Thanks, Michelle

    asked by Michelle
  73. Algebra

    In 1991, the life expectancy of males in ceetain country's was 73.3 years. n 1996, it was 75.8 years. Let E represent the life expectancy in year t and let t reprsent the number of years since 1991. The linear !@#$%^&tion E(t) that fits the data is E(t)=

    asked by Kin
  74. math

    11.6% make it a fraction and a decimal

    asked by sue
  75. business

    which economic system is the best solution to handling a crisis of epic proportion

    asked by nino
  76. chemistry

    The pKa for hydrochloric acid is −6.0. What is the concentration of HCl(aq) we would expect to find in a 1 M solution of hydrochloric acid? What pH would we expect? how do you solve this problem?

    asked by Jin
  77. chemistry

    Which reactants in the reactions below are acting as Br©ªnsted-Lowry bases? NH4 +(aq) + OH−(aq) NH3(aq) + H2O(l) H2PO4 −(aq) + H2O(l) H3O+(aq) + HPO4 2−(aq) is the answer H2O and the H3O+

    asked by Jin
  78. chemistry

    A weak monoprotic acid was calculated, using the usual formula for Ka, to give a pH of 7.4 at a certain concentration. The student who did the calculation was puzzled. What would you advice him/her to do?

    asked by Robert
  79. chemistry

    Why is it that biochemists often remember the pKa of weak acids, rather than Ka?

    asked by Juan
  80. chemistry

    If we suppose that Kw = 1.0x10^-14 at 25C, would it be larger or smaller at 100C? What is the value of K for the reaction 8H + 8OH = 8H2O at 25C? Would this value be smaller, or larger, at 100C?

    asked by Juan
  81. 10th grade

    i want to make an project on safer construction practises for tsunami only want 10questions on this topic

    asked by saima
  82. simple interest rate

    Need simple interest rate (rounded to hundreths) on a loan of $3500 which in two months the maturity value was $3583. What is the formula to figure this problem?

    asked by Lisa
  83. math

    if it takes 8 quarts of ice cream to feed 30 people, how many quarts will it take to feed 75 people?

    asked by Tiffany
  84. math

    Victoria has 2 tea sets that are similar in size. the larger teapot is 12in tall and 6in wide. if the smaller teapot is 8in tall, how wide is it

    asked by Tiffany
  85. Health

    I Feel its B. Or D. Trcky question According to the AMA, what is a key reason behind a physician’s duty of confidentiality to a patient? A. The U.S. Constitution requires a physician’s confidentiality. B. The patient will feel more confident in

    asked by cindy
  86. Health

    This can be C. OR D. couldn't it be? A second hand statement? Dang! or even B. Keep running this through my head Which one of the following statements is an example of hearsay? A. I saw the doctor administer the injection. B. I checked the patient’s

    asked by Jessica
  87. math

    8/30=x/75 solve for x

    asked by Tiffany
  88. UA Flight 93

    Imagine if Flight 93 landed safely on the ground during Sep. 11. What would have happened to the passengers and hijackers?

    asked by AL 92
  89. algebra

    How do you convert the square-root of 2 into a decimal? The question states:"write the numbers in increasing order" The numbers are 1,1/3,and square root of 2. Thanks for your help!

    asked by Alisa
  90. Math


    asked by Arlene
  91. Math

    How do you find factors of a number?

    asked by Mary
  92. math-algebra please help

    The line y=0.15x+0.79 represents an estimate of the average cost of gasoline each year. The line 0.11x-y=-0.85 estimates the price of gasoline in January of each year (“Consumer price index,” 2006). a. Do you expect the lines to be intersecting,

    asked by Michelle
  93. math

    which is equivalent to 1/4 of 1%? a. 0.000025 b. 0.00025 c. 0.0025

    asked by Julie
  94. math

    if (2 x 10^2) + (3 x 10^3) = n x 10^3, what is the value of n? how did you find n?

    asked by Julie
  95. Mechanics

    If an object weighs 39.2 N on Earth, what is its mass?

    asked by Anonymous
  96. algebra

    soilbean meal is 18% protein, cornemeal is 9% protein ow many pounds o each should be mixed together in oder to get 360lbs. mixture that is 14 protein? How pounds of cornmeal do you need and how many pounds of soybean do you need?

    asked by Louren
  97. English

    What do you think was Lance Armstrongs purpose in writing his book Its Not About The Bike?

    asked by Luke
  98. alg

    Which expression represents the sum of the following? (5)/ (2t + 1) + (-1) / (4t^2 + 4t + 1) a) 10t + 4 / (2t + 1)^2 b) 4 / (2t + 1)^3 c) 4 / 4t^2 + 6t + 2 d) 10t + 1 / (2t + 1)^2

    asked by sean
  99. math

    8/2=12/x what does x equal?

    asked by Tiffany
  100. Government Check

    Which Amendment extended voting rights to women? 19th

    asked by Ariel
  101. geometry

    Which is the area of a circle with a radius of 5 units? (use 3.14 for ) answer in square units.

    asked by Superman
  102. physics

    how is Gauss's Law use in determining the electric field anywhere around a point charge and how is this related to Coulomb's law?

    asked by alex
  103. college

    Primitive air consists of 58% H2O 32% CO2 10% N2 so how many grams of primitive air do you need to react with 1 gram of H2?

    asked by John
  104. Economics

    With the new UK emregncy budget what are the advanatages and disadvantages of decreasing the corporation tax?

    asked by Lily
  105. Math

    I can not get a handle on this one. Jerome is 66 inches tall, what weights will keep his BMI between 18-27 ? I= 700w/h2 I think the answer is 111.96

    asked by Christy
  106. 205

    2. Discussion Question 1 • Due Date: Day 2 (Main forum) • View the Vacuum Sales digital story located on the Materials tab of your student Web site for Week Six. Of the two arguments provided in the digital story, which is valid and which is sound?

    asked by axia