xavier

Most popular questions and responses by xavier
  1. English

    It was a night to remember. Marian Anderson was one my favorite singers. Her rendition of the song “Were You There” ran through my head as we walked toward the Metropolitan Opera House. Of course, I listened to the radio when she sang at the Lincoln

    asked on March 12, 2015
  2. Math

    the distance between the center of symmetry of a parallelogram and its longer side is equal to 12 cm. The area of the parallelogram is 720 cm^2, and its perimeter is 140 cm. Determine the length of the longer diagonal of the parallelogram

    asked on October 28, 2013
  3. Chemistry

    What mass of AgI can be produced from a 0.512g sample that assays 20.1% ALI3?

    asked on July 13, 2013
  4. material balance

    Wet air containing 4.0 mole% water vapor is passed through a column of calcium chloride pellets. The pellets adsorb 97.0% of the water and none of the other constituents of the air. The column packing was initially dry and had a mass of 3.40kg. Following

    asked on July 12, 2014
  5. Math

    Which statement about a sphere is true? A.The length of the diameter of a sphere is two times the length of the radius of the sphere. B.The great circle of a sphere is a three-dimensional circle. C.The great circle of a sphere is not the same shape as the

    asked on May 16, 2019
  6. Chemistry

    What mass of KIO3 is needed to convert the copper in 0.200g of CuSO4.H2O to Cu(IO3)2? my answer is: 0.828g Cu(IO3)2 x (2*214.003 MolarM KIO3/ 413.36 MolarM Cu(IO3) = 0.857g KIO3 could you please check if i got it right

    asked on July 17, 2013
  7. Chemistry

    Methyl salicylate, C8H8O3, the odorous constituent of oil of wintergreen, has a vapour pressure of 1.00 torr at 54.3oC and 10.0 torr at 95.3oC. a) What is its vapour pressure at 25oC? b) What is the minimum number of liters of air that must pass over a

    asked on December 8, 2012
  8. Physics

    A 60.5-kg person, running horizontally with a velocity of +3.76 m/s, jumps onto a 10.4-kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. m/s (b) The

    asked on October 24, 2010
  9. Physics

    A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 35.0 m/s. The bat does Wnc = 65.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above

    asked on October 24, 2010
  10. Density Problem

    The moon has radius 1740 km and mass 7.35x10^22? kg.What is its average density?

    asked on November 17, 2013
  11. Chemistry

    At a local convenience store, you purchase a cup of coffee, but, at 98.4oC, it is too hot to drink. You add 23.0 g of ice that is –2.2oC to 248 mL of the coffee. What is the final temperature of the coffee? (Assume the heat capacity and density of the

    asked on December 9, 2012
  12. Math

    Bobby has some marbles.one-third of them are blue.one-half of them are red and the rest are green.if he has 7 green marbles, how many marbles does have altogether?

    asked on September 22, 2014
  13. Need help badly, Science

    Suppose the incident sunlight at ground level has a power density of 0.87 kW m−2 at noon. What is the maximum rate of loss of water from a lake of area 1.0 ha? (1 ha = 104 m2.) Assume that all the radiant energy is absorbed. any ideas on how do i get

    asked on September 28, 2014
  14. Physics

    Computer-controlled display screens provide drivers in the Indianapolis 500 with a variety of information about how their cars are performing. For instance, as a car is going through a turn, a speed of 201 mi/h (89.847 m/s) and a centripetal acceleration

    asked on November 25, 2010
  15. Analytic Geometry

    Find the equation of the parabola through (-15/4 ,2) and (0,-1) whose axis is parallel to the x-axis and the latus rectum equal to 4

    asked on February 11, 2013
  16. math

    Maggie has a box of 300 colored blocks.The box has a equal number of green and blue blocks and an equal number of red and yellow blocks.If Maggie arranged all of the green blocks in stacks of 10 and all of the blue blocks in stacks of 7,how many yellow

    asked on March 25, 2016
  17. Chemistry

    Sea water contains an average of 270 ppm of sulfate ion. Calculate the molar concentration of sulfate given that the average density of sea water is 1.02 g/ml. -At first i tried assuming that density is 1.00 g/ml which is a common practice in ppm problems

    asked on June 12, 2013
  18. Finance

    Bond Pricing: A 6-year Circular File bond pays interest of $80 annually and sells for $950. What is its coupon rate, current yield, and yield to maturity? Bond Pricing : If the Circular File wants to issue a new 6-yar bond at face value, what coupon rate

    asked on March 19, 2007
  19. physics

    One of the Echo satellites consisted of an inflated spherical aluminum balloon 30 m in diameter and of mass 20 kg. Suppose a meteor having a mass of 9.2 kg passes within 4.4 m of the surface of the satellite. What is the gravitational force on the meteor

    asked on November 26, 2010
  20. Physics

    Adolf and Ed are wearing harnesses and are hanging from the ceiling by means of ropes attached to them. They are face to face and push off against one another. Adolf has a mass of 117 kg, and Ed has a mass of 77 kg. Following the push, Adolf swings upward

    asked on October 24, 2010
  21. Physics

    A cue ball (mass = 0.150 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.45 N·s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second

    asked on October 24, 2010
  22. Biology

    Conservationists establish that the minimal viable population of a population of tigers in an extensive geographical area is 16. The current population of tigers is 10. What is likely to happen to the population of tigers? A. Tigers from adjoining

    asked on October 17, 2018
  23. Math, Related Rates

    Consider the hyperbola y = 1/x and think of it as a slide. A particle slides along the hyperbola so that its x-coordinate is increasing at a rate of f(x) units/sec. If its y-coordinate is decreasing at a constant rate of 1 unit/sec, what is f(x)? -I

    asked on September 10, 2013
  24. maths

    John is 3 times as old as Susan now. In 4 years time John will be 18 years older than Susan. Find John's age and Susan;s age now.

    asked on March 22, 2012
  25. Trigonometry

    Write an equation of cotangent with period = 3pi, phase shift = -pi, and vertical shift = -1

    asked on December 6, 2016
  26. Algebra

    A square has an area of 400 square miles. What is the length of each side of the square?

    asked on April 15, 2016
  27. Physics

    A 83.0-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.80 m/s2

    asked on October 3, 2010
  28. Social studies Grade 7

    Why was northern Italy a natural birthplace for the Renaissance? Anything would help. Thanks.

    asked on November 8, 2017
  29. Physics

    A 0.02kg bullet collides with a 5.75kg pendulum. After the collision, the pair swings up to a maximum height of 0.386m. Determine the velocity of the bullet just before impact.

    asked on October 5, 2013
  30. Math

    one of the valves on the hoover dam releases 40,000 gallons of water per second. what is the rate in gallons per minute?

    asked on January 22, 2018
  31. Chemistry help

    Average human blood serum contains 18 mg of K+ Calculate: a) the molar concentration for each of these species; use 1.00 g/mL for the density of serum. I have worked as of this (18 mg K+/100 mL)(1mL/1g)(1 mmol/39.10mg)(1g/1000mg). But it seems that some

    asked on July 7, 2013
  32. PE

    why do you think it is necessary to identify your values when using the decide process to make the important decision

    asked on October 4, 2016
  33. english

    why does tasha the narrator in the tail think that her summer is ruined

    asked on September 20, 2016
  34. Physics

    The height of a certain waterfall is 33.2 m. When the water reaches the bottom of the falls, its speed is 25.8 m/s. Neglecting air resistance, what is the speed of the water at the top of the falls?

    asked on October 24, 2010
  35. Chemistry

    What is the mass, in grams, of a pure iron cube that has a volume of 5.00 cm3

    asked on January 30, 2019
  36. Physics

    A 0.02kg bullet collides with a 5.75kg pendulum. After the collision, the pair swings up to a maximum height of 0.386m. Determine the velocity of the bullet just before impact.

    asked on October 5, 2013
  37. Analytic Geometry

    Please help me to solve this problem. Find the equation of the locus of a moving point if the sum of the slopes of the line joining it to (1,3) and (4,-2) is 1.

    asked on December 13, 2012
  38. physics

    In the javelin throw at a track and field event, the javelin is launched at a speed of 29 m/s at an angle of 35° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How

    asked on September 15, 2010
  39. Math

    Janie couch is 7 1/2feetlong the scale of the dollhouse is 1inch:2feet what is the length if the miniature couch for the dollhouse

    asked on September 6, 2018
  40. Chemistry

    The ΔHof of gaseous dimethyl ether (CH3OCH3) is –185.4 kJ/mol; the vapour pressure is 1.00 atm at –23.7oC and 0.526 atm at –37.8oC. a) Calculate ΔHovap of dimethyl ether. b) Calculate ΔHof of liquid dimethyl ether Any idead how to calculate for

    asked on December 11, 2012
  41. Physics

    A 0.030-kg bullet is fired straight up at a falling wooden block that has a mass of 5.0 kg. The bullet has a speed of 700 m/s when it strikes the block. The block originally was dropped from rest from the top of a building and had been falling for a time t

    asked on October 24, 2010
  42. Chemistry HELP

    A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside and stored at 0.0oC. just

    asked on December 11, 2012
  43. Math

    In the Greenwich Public Library, about one-tenth of the books are overdue when they are returned. An average of 580 books are returned to the library each day. About how many books could be expected to be returned on time each day?

    asked on March 6, 2018
  44. Trigonometry

    Write an equation of sin with amplitude = 2, period = 2pi, and vertical shift = 5

    asked on December 6, 2016
  45. Chemistry

    A 0.75 L bottle is cleaned, dried, and closed in a room where the air is 22°C and 47% relative humidity (that is, the water vapor in the air is 0.47 of the equilibrium vapor pressure at 22°C). The bottle is brought outside and stored at 0.0°C. My

    asked on December 11, 2012
  46. Accounting

    On January 1, 2008, Boston Enterprises issues bonds that have a 3,400,000 par value, mature in 20 years, and pay 9% interest semiannually on June 30 and December 31. The bonds are sold at par. How much interest will Boston pay (in cash) to the bondholders

    asked on June 27, 2008
  47. Algebra

    How many solutions as a system of equations have? 2X= -10y + 6 & x+5y=3

    asked on June 17, 2017
  48. MATH

    A tin is a right circular cylinder with a diameter of 6 meters and a height of 10 meters. What is the surface area of this tin, in terms of pi?

    asked on March 1, 2013
  49. Chemistry

    I need help with this problem A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside

    asked on December 9, 2012
  50. Physics

    A 4.5 104-kg space probe is traveling at a speed of 15000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 3.0 105 N over a distance of 2400 km. What is the final

    asked on October 23, 2010
  51. Physics

    Suppose this dude wants to be able to touch the rim of a basketball goal. The rim is 3.048 m above the ground. The dude can reach up 2.45 m with his feet on the ground. (a) If the dude can achieve a liftoff speed of 2.80 m/s, what is his maximum upward

    asked on July 10, 2013
  52. physics

    A power boat of mass 465 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the

    asked on October 23, 2010
  53. Physics

    To hoist himself into a tree, a 66.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with a force of 366 N. Neglect any friction between the rope

    asked on September 29, 2010
  54. Math

    Bond Yields. An AT&T bond has 10 years until maturity, a coupon rate of 8 percent, and sells for $1,100. a. What is the current yield on the bond? b. What is the yield to maturity?

    asked on March 19, 2007
  55. Physics

    A cannon ball is fired horizontally with an initial speed of 75 m/s from the top of a 50-m tall building. When the ball hits the ground, its velocity vector makes an angle θ with the horizontal. What is θ

    asked on February 11, 2015
  56. science 6th grade

    do you know where I can find in abc order all of the STATES AND THEIR CAPITALS MAYBE A LINK. THIS IS FOR MY HOMEWORK TOMORROW.....THANK YOU IN ADVANCE FOR YOUR HELP!

    asked on April 22, 2012
  57. physics

    You weigh 516 N at sidewalk level outside the World Trade Center in New York City. Suppose that you ride from this level to the top of one of its 410 m towers. Ignoring Earth's rotation, how much less would you weigh there (because you are slightly farther

    asked on November 26, 2010
  58. Physics

    A stone is tied to a string (length = 0.800 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

    asked on November 25, 2010
  59. Math

    It makes 3/4 of an hour for an automated sprinkler to cover 2/7 of a lawn.After an hour has passed ,what fraction of a lawn has been covered

    asked on January 8, 2018
  60. Calculus

    Two horizontal forces,  and , are acting on a box, but only  is shown in the drawing.  can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that  = +4.2 N

    asked on January 4, 2017
  61. math

    The Flour Power Bakery makes 200 cherry cheesecakes at a cost of $2.45 each. If a spoilage rate of 5% is anticipated, at what price should the cakes be sold to achieve a 40% markup based on cost?

    asked on August 31, 2013
  62. chemistry

    how many milliliter of .750M sulfuric acid are needed to neutralize completely 20 g of NaOH?

    asked on April 22, 2013
  63. Chemistry

    A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside and stored at 0.0oC. a) What

    asked on December 9, 2012
  64. Math Help!

    Kayla buys a $20 phone card. She is charged $0.15 per minute for long distanced calls. What equation gives the value (v) left on her card after she makes (t) minutes of long distance calls.

    asked on December 5, 2012
  65. physics

    A 435-kg sailboat has an acceleration of 0.80 m/s2 at an angle of 50° north of east. Find the magnitude and direction of the net force that acts on the sailboat

    asked on September 29, 2010
  66. Physics Normal force

    When an object exerts a normal force on a surface, the force is My answer is perpendicular to the surface. Am i correct?

    asked on August 3, 2013
  67. reading

    hello im diong meaning match for an example inter + scene = interview counter + segment of a whole = ???

    asked on November 5, 2012
  68. math

    find the product or quotient . write the strategy you used . write model,break apart, multiplication table ,inverse operations pattern ,or doubles 56 divided by 7

    asked on September 19, 2011
  69. chemistry

    Which of the following would be the best technique to use in order to separate a soluble solid from a liquid?

    asked on June 21, 2011
  70. science

    a person has a hert attack and her condition is stablised but due to inflamatiom in the lung she could not breath so a machine helps her to breath and now the lung inflamation is healing .Will she be able to breath on her own once the machine is cut off?

    asked on May 30, 2011
  71. math

    What is the largest three digit number you can write without using a 9 in the hundreds place or ones place, or an 8 in the tens place?

    asked on February 1, 2011
  72. physics

    One of the Echo satellites consisted of an inflated spherical aluminum balloon 30 m in diameter and of mass 20 kg. Suppose a meteor having a mass of 9.2 kg passes within 4.4 m of the surface of the satellite. What is the gravitational force on the meteor

    asked on November 26, 2010
  73. Physics

    I tried working this out and I got 495 which is wrong. im not sure what to do. A two-stage rocket moves in space at a constant velocity of 4650 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the

    asked on October 26, 2010
  74. Physics

    The lead female character in the movie Diamonds Are Forever is standing at the edge of an offshore oil rig. As she fires the gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.005 kg, and its velocity is +726 m/s. Her

    asked on October 24, 2010
  75. Physics

    For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. Each time the heart beats, blood is pushed

    asked on October 24, 2010
  76. Physics

    In an action-adventure movie, the hero lifts the 89-kg villain straight upward through a distance of 2.0 m in 0.47 s at a constant speed. What power does the hero produce while doing this?

    asked on October 24, 2010
  77. Physics

    During a circus performance, a 75-kg human cannonball is shot out of an 19-m-long cannon. If the human cannonball spends 0.94 s in the cannon, determine the average net force exerted on him in the barrel of the cannon

    asked on September 29, 2010
  78. Math

    A man fishing in Lake Erie near Erie, Pennsylvania, speared that state's record carp while bow fishing. The fish was 49 inches long and weighed 54 pounds, 4 ounces. to the nearest thousandth of a pound, how many pounds per inch is that?

    asked on January 11, 2018
  79. trigonometry

    Write an equation of secant with period = pi, phase shift = -pi/2, and vertical shift = 3

    asked on December 6, 2016
  80. physics

    On a banked race track, the smallest circular path on which cars can move has a radius of 101 m, while the largest has a radius of 163 m, as the drawing illustrates. The height of the outer wall is 19.0 m. Find (a) the smallest and (b) the largest speed at

    asked on September 18, 2016
  81. Chemistry

    Calculate the kinetic energy change in the water that occurs when 10,000lb/hr flow in a pipe that is reduced from a diameter of 2 in. to a diameter to 1 in. Any ideas on solving this? The answer is 2.7 lbf*ft.

    asked on November 7, 2014
  82. media

    I realize that this may sound like a unique question, but please humor me anyway. Is there a place where people can efficiently watch relatively recent movies in their entirety for free? Or is that illegal?

    asked on December 14, 2013
  83. chemistry about buret

    In the experiment of buret calibration, what is the importance of having total buret correction? And does the density of the water at a specific temperature affect this corrections?

    asked on July 2, 2013
  84. Analytic Geometry

    Find the equation of a circle passing through (3,7) and tangent to the lines x-3y+8=0 and y=3x. Please help me

    asked on January 25, 2013
  85. Analytic Geometry

    Find the equation of a circle passing through (3,7) and tangent to the line x-3y+8=0

    asked on January 25, 2013
  86. social studies

    GIFT OF THE NILE 1. What would be the main mineral resource in lower Egypt?

    asked on October 14, 2012
  87. Math

    Auppose f is even but g is an arbitrary function (possibly neither even nor odd). (a) Is f o g still even? Show why or why not. (b) Is g o f even? Show why or why not.

    asked on October 3, 2012
  88. MATH 6th

    1. Is there a website that can show me how to divide decimals by10-1000? 2. Divide decimals by whole numbers? 3. Patterns with tenths, hundredths and thousandths? PLEASE HELPL ME - THANK YOU IN ADVANCE. JUST SOME SAMLES OF ALL THE ABOVE

    asked on April 26, 2012
  89. math

    What 42 out of 16 simpfly

    asked on January 11, 2012
  90. Physics

    A two-stage rocket moves in space at a constant velocity of 4650 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1240-kg upper stage is 5640 m/s in the same

    asked on October 24, 2010
  91. physics

    A person pulls a toboggan for a distance of 20.0 m along the snow with a rope directed 25.0° above the snow. The tension in the rope is 85.0 N. (a) How much work is done on the toboggan by the tension force? (b) How much work is done if the same tension

    asked on October 23, 2010
  92. 6th grade math

    7=2-5m; m my answer key says -1 but I don't know why it would be that. Can you explain?

    asked on April 20, 2010
  93. science

    explain an abstract

    asked on January 14, 2008
  94. Math

    what is 420/69

    asked on December 10, 2017
  95. math

    True or false 1.) The set of integers contains the set of rational numbers 2.)Every repeating decimal is a rational number 3.)Every square root is an irrational number 4.) the set of whole numbers contains the set of rational number 5.)every terminating

    asked on October 30, 2017
  96. Physics

    A tangential force acts on the rim of a 2.0 kilogram disk-shaped wheel (0.50 m radius) and gives the wheel an angular acceleration of 4.8 rad/s^2. Neglect friction and find the magnitude of the force.

    asked on April 4, 2015
  97. English

    How does the setting of this memoir affect its plot? What does this question means? memior? affect its plot?

    asked on March 12, 2015
  98. Calculus II

    Solve the initial value problem using Taylor Series and the following conditions: y'(t) = y(t) + 2t y(0) = A

    asked on February 2, 2014
  99. algebra

    How do I solve this problem  ã2x -7+8=11

    asked on September 15, 2013
  100. MATH

    Posted by xavier on Monday, February 11, 2013 at 8:28pm. Hello... Asking for help with this one math question to understand how to do the rest of related question? thank you in advance.... shape 1 (3.5,-8.5) ,(3.5,-9) , (3,-10.5) , (2,-12)

    asked on February 11, 2013

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