Popular questions and responses by george
  1. Chemistry

    If it takes three "breaths" to blow up a balloon to 1.2 , and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 balloon. Express your answer in moles using two significant figures Would the answer be 0.38

    asked on September 17, 2008
  2. chemistry

    Rank the relative nucleophilicity of the indicated species in ethanol. CH3COOH CH3OH CH3COO- CH3S- CH3O- THANK YOU!

    asked on November 27, 2010
  3. Chemistry

    What would be the whole name of 2-butene and hydroiodic acid. Or the diagram. h h Any help would be greatly appreciated.

    asked on November 19, 2008
  4. Chem

    How many grams of Ni would be electroplated if a constant current of 7.2 amperes is passed through a solution of NiSO4 for 90.0 min?

    asked on March 19, 2013
  5. chemistry

    In the REDOX reaction in basic solution Zn-->Zn(OH)4+H2 I know that the first half reaction is 4H20+Zn-->Zn(OH)4 +4H+e but the second one is either 2e+2H2O--->H2+2OH (WHICH IS THE ANSWER GIVEN ON THE WORKSHEET) OR 2e+2H-->H2 I think both leads to the same

    asked on November 4, 2010
  6. Math

    A weight of 120 pounds is placed five feet from the fulcrum of a lever. How far from the fulcrum should a 100 pounds weight be placed in order to balance the lever?

    asked on July 9, 2020
  7. College Chemistry

    H2C=C=CH2 molecule is linear, what are they hybridization states of the carbon atoms? draw diagrams to show sigma and pi bonds.

    asked on May 8, 2011
  8. chemistry

    Which of the following has the greatest buffer capacity? There are three separate problems below. 1. 0.40 M CH3COONa / 0.20 M CH3COOH 2. 0.40 M CH3COONa / 0.60 M CH3COOH 3. 0.30 M CH3COONa / 0.60 M CH3COOH Thanks!

    asked on July 17, 2010
  9. Computer Science

    "write a program that asks the user to enter the price of an item and rate of discount. If discount is 9%, display the final cost of item" What message do I display if its not 9%? Algorithms btw

    asked on February 15, 2015
  10. Math

    What is the expression for "the difference between five times a number and twice that number"? A)5(2 - N) B)5N - 2N C)2N - 5N

    asked on January 7, 2010
  11. physics

    The cheetah can reach a top speed of 114km/h (71mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 50m in a straight line reaching a final speed of 91 km/h. a.) Determine the cheetah's average acceleration during the short

    asked on February 3, 2013
  12. chemistry

    Current is applied to a molten mixture of CuF, ZnCl2, and AlBr3. What is produced at the cathode? a)F2 b)Al c)Cu d)Zn e)Cl2 f)Br2 What is produced at the anode? Same options as above.

    asked on May 29, 2012
  13. chem 12

    This is my question Into a 500mL container a chemist introduces 2.0 x 10^-2 mol of N2(g) and 2.0 x10^-2 mol of O2(g). The container is heated to 900degrees celcius and the following equilibrium is achieved. N2(g) + 2O2----N2O4(g) calculate the intial

    asked on February 3, 2016
  14. Math

    The bearing of x from y is 070 and the bearing of z from y is 160, where x, y, and z are three points in the plane .if y is equidistant from x and z, find the bearing of z from x

    asked on January 6, 2019
  15. statistics

    From experience, an airline knows that only 80% of the passengers booked for a certain flight actually show up. If 8 passengers are randomly selected, find the probability that fewer than 7 of them show up.

    asked on March 20, 2014
  16. Math

    Find all vectors v in 2 dimensions having ||v ||=5 where the i -component of v is 3i vectors:

    asked on May 6, 2018
  17. AP Calculus AB Part 2

    The Riemann sum, the limit as the maximum of delta x sub i goes to infinity of the summation from i equals 1 to n of f of the quantity x star sub i times delta x sub i , is equivalent to the limit as n goes to infinity of the summation from i equals 1 to n

    asked on January 26, 2018
  18. algebra

    The sum of two numbers is 56. the larger number is 7 less than 3 times the smaller number. Find the smaller number.

    asked on December 19, 2012
  19. chemistry

    SiH3- planar or pyramidal geometric shape?

    asked on May 8, 2011
  20. Life Orientation

    FOUR things that could be considered to promote humane farming practices.

    asked on September 25, 2018
  21. Physics

    Two point charges of +1.0 uC and -2.0 uC are located 0.50 m apart. What is the minimum amount of work needed to move the charges apart to double the distance between them? (k=8.99x10^9Nm^2/C^2)

    asked on February 12, 2015
  22. chemistry

    The following equation represents the partial combustion of methane, CH4. 2CH4(g) + 3O2(g) > 2CO(g) + 4H2O(g) At constant temperature and pressure, what is the maximum volume of carbon monoxide that can be obtained from 3.39 x 102 L of methane and 1.70 x

    asked on October 4, 2014
  23. math

    The population of a colony of rabbits grows exponentially. The colony begins with 5 rabbits; 5 years later there are 310 rabbits. (a) Express the population of the colony of rabbits, P , as a function of time, t , in years. (b) Use the graph to estimate

    asked on March 13, 2018
  24. Calculus

    A rectangular swimming pool is to be built with an area of 1800 square feet. The owner wants 5-foot wide decks along either side and 10-foot wide decks at the two ends. Find the dimensions of the smallest piece of property on which the pool can be built

    asked on October 25, 2008
  25. science

    The orbital radii of four planets in our solar system are shown in the following table. Orbital Radii Planet Orbital Radii (AU) W 5.2 X 0.72 Y 1.0 Z 19.1 Which planet is likely to experience the highest temperature? W X Y Z I think it is B.x but I am not

    asked on May 10, 2018
  26. algebra

    a ladder is placed 5ft away from a house. the ladder comes up to 12ft on the side of the house. how long is the ladder?

    asked on February 23, 2017
  27. Geometry

    A 5 foot tall woman stands 15ft from a statue. She must look up at an angle of 60 degrees to see the top of the statue. How tall is the statue?

    asked on September 25, 2013
  28. adult education

    Briefly describe the cookie production process. 2. What are two ways that the company has increased productivity? Why did increasing the length of the ovens result in a faster output? 3. Do you think that the company is making the right decision by not

    asked on November 8, 2010
  29. New Testament Survey

    The ruler who showed the Jews great favor was a)General Ptolemy Soter b)Alexander the Great c)Caesar of Rome d)Pharaoh Ptolemy Philopator e)Mattathias the Maccabean

    asked on December 10, 2009
  30. New Testament Survey

    Whom did the Persian Empire allow to rule the Jews? a)Persian business men b)religious council c)political parties d)Maccabean family e)the high priest

    asked on December 10, 2009
  31. math

    Find the exact area between y=lnx and y=ln(x^ 2 ) for 4≤x≤8 .

    asked on September 13, 2018
  32. Physics

    A charge of -17 nC is on the X axis at the origin. A charge of -24 nC is on the X axis at 11 cm. Find the electric field (magnitude and direction) at 19 cm on the X axis. I believe to solve this problem, the equation E = kC (q1/r1^2) must be used for each

    asked on April 10, 2017
  33. calculus

    If f(x) = ι(x2 - 8)ι, how many numbers in the interval 0 ≤ x ≤ 2.5 satisfy the conclusion of the mean value theorem? (4 points) Three Two One None

    asked on January 16, 2015
  34. Math Trig Please Help!!!

    Find exact values for all the solutions to the equation cos theta = sqrt 3/2 for -2pi

    asked on November 7, 2014
  35. Physics

    A 5.36 kg object falls freely (ignore air resistance), after being dropped from rest. Determine the initial kinetic energy, the final kinetic energy, and the change in kinetic energy for the following. (a) first meter of fall initial kinetic energy 0 J

    asked on March 8, 2014
  36. Calculus

    Find the volume of the solid generated by revolving the region enclosed in the triangle with vertices (4.6,4.6), (4.6,0), (6.7,4.6) about the x-axis.

    asked on September 16, 2008
  37. calculus inverted cone

    A container in the shape of an inverted cone has radius 6 ft and height 12 ft. It is being drained at 2〖ft〗^3/min. Find the rate of change of the height of the liquid in the cone when the height is 3 feet. The ratio of the radius to the height remains

    asked on November 11, 2014
  38. physics

    A man in a maze makes 3 consecutive displacements. His first displacement is 5.40m westward, and the second is 18.0m northward. At the end of his displacement he is back to where he started. Use the graphical method to find the magnitude and direction of

    asked on January 28, 2013
  39. Trigonomety question

    How do you find the exact value of Sin(13pi)?

    asked on October 8, 2012
  40. Statistics

    A maker of microwave ovens advertises that no more than 10% of its microwaves need repair during the first 5 years of use. In a random sample of 57 microwaves that are 5 years old, 13% needed repairs. At á=0.01, can you reject the maker’s claim that no

    asked on May 5, 2010
  41. chemistry

    What is the solubility product constant expression for aluminum hydroxide?

    asked on May 23, 2019
  42. New Testament Survey

    The Syrian ruler who defiled the Jewish Temple altar and martyred many Jews was A)Ptolemy Philopator B)Alexander the Great C)Herod Antipas D)Antiochus Epiphanes E)Caesar Augustus

    asked on December 10, 2009
  43. Math

    Given a polynomial and one of its factors, find the remaining factors of the polynomial. Some of the factors may not be binomials. 169x^3-1690x^2-9x+90; x-10

    asked on December 31, 2008
  44. Hard Calculus

    A dose, D, of a drug causes a temperature change, T, in apatient. For C a positive constant, t is given by T=((C/2)-(D/3))D^3. (a) What is the rate of change of temperature change with respect to dose. (b) For what dose does the temperature change increase

    asked on November 9, 2008
  45. Calculus

    The hypotenuse of a right triangle has one end at the origin and one end on the curve y=x^(7)e^(-7x) , with x greater than or equal to 0. One of the other two sides is on the x-axis, the other side is parallel to the y-axis. Find the maximum area of such a

    asked on October 21, 2008
  46. Calculus

    Find a value of the constant k such that the limit exists. lim x->1 (x^2-kx+4)/(x-1) Is the answer 5?

    asked on September 8, 2008
  47. statistics

    1. Express the indicated degree of likelihood as a probability value. "There is a 40% chance of rain." 2. Find the indicated probability A bag contain 6 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what

    asked on August 28, 2007
  48. math 11

    Michaela has up to $20 to spend on bottled water and orange juice for a group hike. It cost $2 for each bottle of water and $ 4 for each bottle pdf orange juice. write an inequality statement of this situation? 2x +4y< or equal to 20 Y < or equal to-1/2x

    asked on April 15, 2018
  49. Math

    Movie starts at 5:20 it is a 1 hour and 50 minutes long. What time does the movie end?

    asked on December 6, 2016
  50. chem 12

    consider the following equilibrium 2NOCl(g)--- 2 NO(g) + Cl2(g) Initally 1.00 mol of NO and 1.00 mol of Cl2 are placed in a 5.00L container. Calculate the initial concentrations of NOCl, NO and Cl2 NO= 0.20 mol/L Cl2= 0.20 mol/l NOCl=0 At equilibrium it is

    asked on March 8, 2016
  51. calculus

    The surface area, S, of a sphere of radius r feet is S = S(r) = 4πr2. Find the instantaneous rate of change of the surface area with respect to the radius r at r = 2. (4 points)

    asked on January 16, 2015
  52. Geometry

    A 5 foot tall woman stands 15 ft from a statue. She must look up at an angle of 60° to see the top of the statue. How tall is the statue?

    asked on September 20, 2013
  53. chemistry

    What is the IUPAC name for the following molecules: 1. CH3CH2N(CH2CH2CH3)CH2CH3 2. CH3CH2N(CH3)CH2CH3 I tried N,N-diethylpropanamine for the first one and N-methyl-3,4-ethanamine for the second one, but my instructor said they were wrong. If anyone could

    asked on May 28, 2011
  54. earth science

    Select all of the answers that apply. Some rules to remember when reading topographic maps are _____. 1)the elevations of contour lines must always be whole number multiples of the contour interval. 2)the thin line separating two different rock units is a

    asked on April 7, 2010
  55. math

    Match the equation with the step needed to solve it. 1. 2m - 1 = 3m subtract m 2. 2m = 1 + m subtract 2 3. m - 1 = 2 subtract 1 4. 2 + m = 3 subtract 2m 5. -2 + m = 1 add 2 6. 3 = 1 + m add 1

    asked on January 14, 2010
  56. Math

    Integers are _____ irrational numbers. always sometimes never

    asked on January 7, 2010
  57. Physics

    John is carrying a shovelful of snow. The center of mass of the 3.00 kg of snow he is holding is 15.0 cm from the end of the shovel. He is pushing down on the opposite end of the shovel with one hand and holding it up 30.0 cm from that end with his other

    asked on December 10, 2008
  58. calculus

    a box with no top is to be built by taking a 12''-by-16'' sheet of cardboard and cutting x-inch squares our of each corner and folding up the sides. find the value of x that maximizes the volume of the box

    asked on November 25, 2008
  59. math HARD

    What is the general formula for the factorial notation? Hmmmm. Hard? n!= 1*2*3*4*...*n-1*n I have been missing from school and we have just learned it. So I am not very good at it. There is quite a lot on Wikipedia /wiki/Factorial Which includes the

    asked on March 31, 2007
  60. math

    A boy 1.2m tall, stands 6m away from the foot of a vertical lamp pole 4.2m long if the lamp is at the tip of the pole calculate the length of the shadow of the boy cast by the lamp Angle of elevation of the lamp from the boy, correct to the nearest degree

    asked on February 21, 2019
  61. Chemistry

    What is the complete redox reaction of KMnO4 against (NH4)2Fe(SO4)2

    asked on July 22, 2018
  62. Calculus

    The velocity of a ball that has been tossed vertically in the air is given by v(t) = 16 − 32t, where v is measured in feet per second, and t is measured in seconds. The ball is in the air from t = 0 until t = 2. Determine the value of v'(1). What are the

    asked on July 6, 2015
  63. calculus

    A 15-ft ladder rests against a vertical wall. If the top of the ladder slides down the wall at a rate of 0.33 ft/sec, how fast, in ft/sec, is the bottom of the ladder sliding away from the wall, at the instant when the bottom of the ladder is 9 ft from the

    asked on January 17, 2015
  64. chemistry

    When 34.1 g of lead reacts with 6.81 L of oxygen gas, measured at 1.00 atm and 25.0°C, 36.1 kJ of heat is released at constant pressure. What is DH° for this reaction?

    asked on October 5, 2014
  65. Physics

    A penny rests on top of a bowling ball. You give the bowling ball a slight bump and the penny slides off the frictionless, spherical surface as shown below. At what angle θ does the penny leave the surface of the bowling ball? (Hint: When the penny leaves

    asked on March 8, 2014
  66. Geometry

    Two similar pyramids have laterl area 8ft^2 and 18ft^2. The volume of the smaller pyramid is 32ft^3. Find the volume of the larger pyramid.

    asked on September 29, 2013
  67. Public Speaking

    A speaker talking about the benefits of cosmetic surgery to an audience primarily of women is appealing to which level of needs in Maslow’s Hierarchy of Needs? A. Physiological needs B. Esteem needs C. Belongingness and love D. Safety needs

    asked on April 24, 2013
  68. physics

    If the car has a mass of 0.4 kg, the ratio of height to width of the ramp is 13/125, the initial displacement is 1.9 m, and the change in momentum is 0.87 kg*m/s, how far will it coast back up the ramp before changing directions?

    asked on February 7, 2013
  69. Social Studies

    I am having a hard time with economics - we just started in my social studies class. Can I have help with my homework, please? 1. What phrase best defines competition? (1 point) just one main buyer of a good or service just one main seller of a good or

    asked on November 2, 2012
  70. physics

    A 50 kg uniform ladder, 5.0 m long, is placed against a smooth wall at a height of h = 3.7 m. The base of the ladder rests on a rough horizontal surface whose coefficient of static friction is 0.40. An 80 kg block is suspended from the top rung of the

    asked on October 29, 2012
  71. physics

    The highest George can suck water up a very long straw is 2.0m What is the lowest pressure he can maintain in his mouth? Express to two sig figs

    asked on September 7, 2012
  72. Physics

    Find the speed of sound (in m/s) at -35°C at 1 atm pressure in dry air.

    asked on April 13, 2012
  73. Physics

    A cube of wood with a density of 0.780 g/cm3 is 10.0 cm on each side. When the cube is placed in water, what buoyant force acts on the wood? (ρw = 1.00 g/cm3) a. 5.00 N b. 6.40 N c. 7.65 N d. 7.65 x 10^3 N

    asked on December 19, 2011
  74. Physics Calculation

    The weight of an apple near the surface of the earth is 1N. What is the weight of Earth in the gravitational field of the apple?

    asked on May 14, 2011
  75. Physics (Circular Motion!!)

    Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 30.0 s to speed up from rest to its top speed of 1 rotation every 1.10 s. the astronaut is strapped into a seat 7.40 m from the axis. A) What is the

    asked on September 2, 2010
  76. chemistry

    The ionization constant Ka of an indicator HIn is 1.0x10^-6. The color of the nonionized form is red and that of the ionized form is yellow. What is the color of this indicator in a solution whose pH is 4.00? Thanks!

    asked on July 18, 2010
  77. geography

    Which statements describe the management of the earth's resources? 1)Resource management becomes more important as the population increases 2)Resource management is a global issue. 3)Resource management is a local issue. 4)Resource management is a national

    asked on January 11, 2010
  78. precalculus

    2cosxcscsx-4cosx-cscx+2=0 solutions?

    asked on January 10, 2010
  79. computers

    I need help with the following: Consider a system that uses pure demand paging. a.When a process first starts execution, how could you characterize the page fault rate? b.Once the working set for a process is loaded into memory, how would you characterize

    asked on December 11, 2009
  80. Biochemistry

    Hello guys, I just wanted some clarification of these question. 1. A sequence of amino acids in a certain protein is found to be -Ser-Pro-Gly-Gly-. The sequence is most probably part of a 1. a-helix 2.b-turn (b-bend) 3. parallel b-pleated sheet 4. a-sheet.

    asked on November 2, 2009
  81. math

    1. (sec^2x-6tanx+7/sec^2x-5)=(tanx-4/tanx+2) 2. (sin^3A+cos^3A/sinA+cosA)=1-sinAcosA 3. csc^6x-cot^6x+1+3csc^2xcot^2x please help

    asked on April 10, 2008
  82. Math

    How much horsepower would the Challenger Hellcat Redeye Widebody need to run the speed of sound arrive before the sound of its legendary engine arrives? Given: Assume Stock Redeye Widebody curb weight Assume no wind Assume no driveline losses Redeye

    asked on November 14, 2019
  83. Physics

    The average distance between Earth and the Sun is 1.5 ✕ 10^11 m. (a)Calculate the average speed of Earth in its orbit (assumed to be circular) in meters per second. (b)What is this speed in miles per hour?

    asked on August 28, 2018
  84. Calculus

    Show that f(x) = x^3 and g(x) = 200x^3 grow at the same rate.

    asked on May 4, 2018
  85. geometry

    These polygons are similar but not drawn to scale & Are the two triangles similar how do you know

    asked on March 19, 2018
  86. Physics

    A golf ball with an initial angle of 34 degrees lands exactly 240 m down the range on a level course. a.) Neglecting air friction, what initial speed would achieve this result? b.) Using the speed determined in item a, find the maximum height reached by

    asked on October 5, 2016
  87. English

    What does this mean "the cold gleam of the fanatic" It is in the story "The Sniper" by Liam O'Flaherty

    asked on November 18, 2015
  88. stat

    The mean of a normal probability distribution is 60; the standard deviation is 5

    asked on November 5, 2015
  89. pre-calculus 11

    an object has a mass of m= 3x/4x^2 and density of d=x-1/2^2 where ve m/d and state any restrictions on the variable. So this simplifies to v=3x/2x-2 my question is the restriction i have found is x cannot be 1 which would make the denominator zero. Do I

    asked on June 15, 2015
  90. 061555RR

    knutson company reacquired 5,000 shares of its $15-par common stock for $13/share. the debit to treasury stock is

    asked on January 22, 2015
  91. Psychology

    What is the independent variable in this scenario: A research Psychologist is working in a federal prison and is asked to !@#$%^& this new program. From 70 inmate volunteers, the psychologist randomly assigns 45 inmate volunteers to three groups: group A,

    asked on October 2, 2013
  92. Geometry

    A cylindrical hockey puck is 1in high and 3in in diameter. What is its volume in cubic inches?

    asked on September 30, 2013
  93. Geometry

    A regular hexagon with radius 6.2m.

    asked on September 24, 2013
  94. Chemistry

    Consider the titration of 50 mL of 0.250 M HCl with 0.1250 M NaOH. Calculate the pH of the resulting solution after the following volumes of Na OH have been added. a) 0.00 mL b) 50.00 mL c) 99.90 mL d) 100.00 mL e) 100.1 mL The question is, I get, for

    asked on April 27, 2013
  95. chemistry

    What is the vapor pressure at 23 ¢ªC of a solution of 1.20 g of naphthalene, C10H8, in 25.6 g of benzene, C6H6? The vapor pressure of pure benzene at 23 ¢ªC is 86.0 mmHg; the vapor pressure of naphthalene can be neglected. Calculate the vapor pressure

    asked on April 15, 2013
  96. Chemistry

    What is the pH of a 0.77M solution of methylamin at 25 degree C? CH3NH2, Kb= 4.4X10-4? How do I set this up to get the answer?

    asked on March 7, 2013
  97. Physics

    A baseball is dropped from a tall building and takes 4.1 seconds to hit the ground. From what height was the ball dropped?

    asked on January 27, 2013
  98. engineering

    a bolt located 50mm from the center of an auto wheel is tightened by the couple shown for .10 seconds. determine the resulting angular velocity of the wheel if the wheel has a radius of gyration of 250 mm and a mass of 19 kilograms

    asked on November 17, 2012
  99. Physics

    A water bed that is 1.5 m wide and 2.5 m long weighs 1055 N. Assuming the entire lower surface of the bed is in contact with the floor, what is the pressure the bed exerts on the floor? (Round to the first decimal point and don't forget units.

    asked on December 19, 2011
  100. Computer Science - MATLAB

    One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence as a

    asked on July 8, 2011


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