Most popular questions and responses by Shannon
  1. Physics

    A soccer ball kicked on a level field has an initial vertical velocity component of 15 meters per second. Assuming the ball lands at the same height from which it was kicked, what is the total time the ball is in the air? [Neglect friction.]

    asked on November 14, 2012
  2. Physics

    As a box is pushed 30 meters across a horizontal floor by a constant horizontal force of 25 newtons, the kinetic energy of the box increases by 300 joules. How much total internal energy is produced during this process?

    asked on December 9, 2012

    A hawk is flying horizontally at 10 m/s in a straight line 200m above the ground. A mouse it was carrying is released from its grasp. The hawk continues on its path at the same speed for two seconds before attempting to retrieve its prey. To accomplis the

    asked on February 11, 2011
  4. statiictis

    DJ Jacqueline is making a playlist for an mp3 player; she is trying to decide what 12 12 songs to play and in what order they should be played. If she has her choices narrowed down to 21 blues, 13 reggae, and 25 hip-hop songs, and she wants to play an

    asked on April 11, 2017
  5. Stat Help

    A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 4% if the true proportion. Find the sample necessary if in a prior study, a sample of 200 people showed that 40 traveled overseas

    asked on October 6, 2011
  6. physics

    a stunt car driver testing the use of air bags drives a car at a constant speed of 25m/s for a total of 100 meters. he applies his brakes and accelerates uniformlu to a stop just as he reaches the wall 50 meters away. SKETCH THE A GRAPH SHOWING POSITION

    asked on January 20, 2011
  7. Chemistry

    Write the balanced net ionic equation for the following? a) Copper metal and zinc ion b) zinc and cupric ion c) Copper metal and hydrogen ion d) zinc metal and hydrogen ion e) iron metal and hydrogen ion f) Chlorine (Cl2) and bromide ion (Br-) g) Chlorine

    asked on April 16, 2014
  8. Trigonometric Identities

    Triangle ABC is given where angle A=33 degrees, a=15 in., and the height, h, is 9 in. How many distinct triangle can be made with the given measurements. Please explain your answer

    asked on March 28, 2017
  9. Physics- Someone Please Help!!!

    A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is

    asked on October 29, 2012
  10. Statistics

    Childhood participation in sports, cultural groups, and youth groups appears to be related to improved self-esteem for adolescents (McGee, Williams, Howden-Chapman, Martin, & Kawachi, 2006). In a representative study, a sample of n 5 100 adolescents with a

    asked on March 12, 2017
  11. Algebra

    A community college campus plans to construct a rectangular parking lot on land bordered on one side by a highway. There are 640 feet of fencing available to fend the other three sides. Let x represent the length of each of the two parallel sides of

    asked on November 26, 2014
  12. chemistry 110

    what combinations of Zn, Al, ZnSO4 and Al2(SO4)3 would you make to illustrate that Zn is less active than Al?

    asked on October 28, 2010
  13. Physics

    Calculate the electric force between these two electrons. The value of the Coulomb constant 9 × 109 N · m2/C2 and the elemental charge is 1.6×10−19C. Answer in units of N (Newtons)

    asked on March 24, 2015
  14. College Chemistry

    When one mole of C6H6 is burned, 3.27 MJ of heat is produced. When the heat from burning 5.43 g of C6H6 is added to 5.69 kg of water at 21.0°C, what is the final temperature of the water?

    asked on September 15, 2015
  15. chemistry

    Zn is less active than Mg. Write the equations describing what occurs when ou mix: a)Zn with 0.5M magnesium chloride, MgCl2 b)Mg with 0.5M ZnCl2

    asked on October 28, 2010
  16. algebra

    An archer releases an arrow from a shoulder height of 1.39 m. When the arrow hits the target 18 m away, it hits point A. When the target is removed, the arrow lands 45 m away. Find the maximum height of the arrow along its parabolic path. please help!!I

    asked on November 5, 2013
  17. University of North Texas

    A manufacturer ships toasters in cartons of 25. In each carton, they estimate a 8% chance that one of the toasters will need to be sent back for minor repairs. In a batch of 12,000 toasters, what are the chances that fewer than 950 need to be returned?

    asked on April 26, 2015
  18. chemistry

    The principal component of many kidney stones is calcium oxalate,CaC2O4. A kidney stone recovered from a typical patient contains 8.50×10^20 formula units of calcium oxalate. How many moles of CaC2O4 are present in this kidney stone?

    asked on October 19, 2011
  19. accounting

    18. Balance sheet and income statement data indicate the following: Bonds payable, 6% (issued 2000, due 2020) $1,200,000 Preferred 8% stock, $100 par (no change during the year) 200,000 Common stock, $50 par (no change during the year) 1,000,000 Income

    asked on October 2, 2012
  20. Chemistry

    Write a balanced nuclear equation for the positron emission of each of the following nuclei: a) arsenic-74 b) oxygen-15

    asked on April 20, 2012
  21. chemistry

    when a student removed the crucible cover afer the first strong heating in creating magnesium oxide, some of the white was knocked from the cover to the floor and was lost. did this loss cause the calculated number of moles of oxygen in the compound to be

    asked on October 4, 2010
  22. chemistry

    is the burning of a marshmallow a(n) endothermic or exothermic process?

    asked on May 9, 2010
  23. history

    Why do Jewish people study the Talmud and Hebrew Bible?

    asked on October 9, 2018
  24. math

    A rectangular photograph is mounted on a rectangular card. There is a border ofequal width around the photograph. The perimeter of the card is 40 centimeters longer than that of the photograph. Find the width of the border in centimeters.

    asked on March 5, 2013
  25. Physics

    A cube has sides of length L = 0.170 m. It is placed with one corner at the origin as shown in the figure below. The electric field is not uniform but is given by = (-6.00 N/C · m)x + (2.00 N/C · m)z. (a) Find the electric flux through each of the six

    asked on September 9, 2011
  26. Math

    The weights of all one hundred (100) 9th graders at a school are measured, and it is found that the mean of all the measurements is 100 lbs., with a standard deviation of 15 lbs.   Explain how you would use this information to determine the percentage of

    asked on December 1, 2016
  27. Chemistry

    consider the reaction: N2(g) + O2 (g) --> 2NO (g) removing some of the N2(g) will_____ A) increase the concentration of O2 B) decrease the concentration of O2 C) increase the concentration of NO(g)

    asked on April 20, 2012
  28. MATH

    The path of a large stone fired from a catapult can be modeled by y= -0.00545x^2+1.145x where x is the distance the stone traveled (in yards) and y is the height of the stone (in yards). 1. find the distance the stone traveled. 2. find the maximum height

    asked on December 7, 2010
  29. Business

    What are some large-scale economic shifts that have created our present service economy? What are some more recent developments that have given rise to our business environment? How would you characterize the most important elements of customer service in

    asked on October 17, 2018
  30. chemistry

    105 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.3, what is the mass of the steel bar?

    asked on February 26, 2011
  31. Physics

    A range in a national park is driving at 47 km/h when a deer jumps onto the road 70m ahead of the vehicle . After a reaction of t seconds, the ranger applies the brakes to produce an acceleration of -2.00 m/s^2. What is the maximum reaction time allowed if

    asked on February 14, 2011
  32. Algebra 2

    D'Andre has decided that he needs to get more exercise, so he is building a running regimen for himself. He decides that, beginning on Sunday, he'll fun 10 feet. On each subseqeunt day he'll double the distance he ran the previous day. So he'll run 20 feet

    asked on February 25, 2015
  33. math

    write the ratio as a percent: in a seventh grade class, 19/25 students voted of having a class picnic

    asked on January 9, 2018
  34. math

    two stores carry similar stereos for the same original price of $573. one store (lets say homegoods)offers a 16% discount and the second store, sells it for $458.40. which store gives the better discount (im stuck i dont know how to answer this plz help)

    asked on January 10, 2018
  35. math

    Am I correct? write the percent as a decimal: 92.8% a. 9280 b.92.8****** c. 0.928 d.9.28

    asked on January 10, 2018
  36. Math

    Untitled Stem and leaf plot. Vertical line separates each stem number from its first leaf number. First row. Stem 2. Leaves 6, 7, 7. Second row. Stem 3. Leaves 0, 2, 3, 3, 4. Third row. Stem 4. Leaves 0, 5. Key. 3 vertical line 0 means 30. What is the

    asked on April 10, 2017
  37. (ENGLISH) please check over english work.

    I have finished all of the questions, just need someone to look over them. I have posted these questions before, but someone told me to re-do them and I decided to post them again. Canada Day Love Match My mother stalked her future son in law, convinced he

    asked on October 8, 2013
  38. math

    A 24-inch piece of string is cut into two pieces. One piece is used to form a circle and the other is used to form a square. How should the string be cut so that the sum of the areas is a minimum?

    asked on September 30, 2008
  39. Math

    Two friends cut a large candy bar into equal pieces Harriet ate 1/4 of the pieces nisha ate 1/2 of the remaining pieces 6 pieces were left over how many pieces was the candy bar originally divided into

    asked on February 26, 2014
  40. business math

    chicken delight sells whole-chicken dinners for $12 and half-chicken dinners for $8. yesterday they sold a total of 400 dinners and took in $4200. how many of each size dinners were sold?

    asked on July 12, 2009
  41. Physics

    Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 720 N, and his speed at the bottom of the pole is 3.8 m/s. How far did he slide down the pole?

    asked on November 16, 2010
  42. physics

    The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." If the ball is kicked with an initial velocity of 23.0 m/s at an angle of 58.5° above the ground, what is the "hang time"?

    asked on January 16, 2011
  43. Physics

    An electron in the c level of a mercury atom returns to the ground state. Which photon energy could not be emitted by the atom during this process?

    asked on April 25, 2013
  44. Physics

    A small first aid kit is dropped by a rock climber who is descending steadily at 1.5 m/s. A.)After 3.1s, how far is the kit below the climber?

    asked on February 14, 2011
  45. statistics

    do students who learned English as well as another language simultaneously score worse on the SAT critical reading exam than the general population of test takers? the mean score di 501. A random sample of 100 test takers who learned English as another

    asked on May 8, 2013
  46. physics

    The drawing shows an exaggerated view of a rifle that has been ‘sighted in' for a 91.4-meter target. If the muzzle speed of the bullet is v0 = 392 m/s, there are the two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that

    asked on September 23, 2012
  47. physics

    A car is traveling at 58.2 km/h on a flat highway. The acceleration of gravity is 9.8 m/s2 . If the coefficient of friction between the road and the tires on a rainy day is 0.155, what is the minimum distance in which the car will stop?

    asked on November 10, 2014
  48. Physical Science

    Judy (mass 45.0 kg), standing on slippery ice, catches her leaping dog, Atti (mass 12kg), moving horizontally at 4.0 m/s. Use the conservation of momentum to find the speed of Judy and her dog after the catch.

    asked on September 19, 2013
  49. geography

    what word refers to a bay cove or other recess along the coast Indentation? From the Thesaurus: bay, bight, cove, creek [ chiefly British ], estuary, firth, fjord ( or fiord), inlet, loch [ Scottish ]

    asked on June 5, 2007
  50. chemistry

    Nitrobenzene, C6H5NO2, is prepared from benzene, C6H6, and nitric acid, HNO3. The other product of the reaction is water. When 22.4 g of benzene is reacted with an excess of nitric acid, 31.6 g of nitrobenzene is produced. What is the percent yield for

    asked on October 8, 2015
  51. Trigonometry

    I'm having trouble figuring this out. An airplane has an airspeed of 160 mph. It is to make a flight in a direction of 80° while there's a 20 mph wind from 310°. What will the airplane's actual heading be? I'd appreciate any help especially on how you

    asked on July 27, 2017
  52. algebra

    Find the point-slope form of the line that passes through given the point and has the given slope.Include your work in your final answer. Type your answer in the box provided or use the upload option to submit your solution. (0, 0) m = 2

    asked on February 10, 2016
  53. Statistics

    1. A simple random sample of FICO credit rating scores is listed below: 714 751 664 789 818 779 698 836 753 834 693 802 a. Find range, variance, and standard deviation. b. As of this writing, the mean FICO score was reported to be 678. Based on these

    asked on October 5, 2013
  54. chemistry

    3.5g of CuCl2.2H2O were dissolved and reacted with excess Na2SO3 in the presence of HCl. After filtration, 1.5g of CuCl crystals was obtained. Calculate the %yield.

    asked on November 14, 2011
  55. math

    In order to accumulate enough money for a down payment on a​ house, a couple deposits $ 688 per month into an account paying 6 % compounded monthly. If payments are made at the end of each​ period, how much money will be in the account in 4 ​years?

    asked on March 5, 2018
  56. chemistry

    what type of intermolecular force describes the interaction between Ca2+ and Mg2+ with water? a. dipole-dipole b. hydrogen bonding c. ion-dipole d. London dispersion

    asked on May 11, 2010
  57. Trigonometry

    I'm having trouble figuring this out. An airplane has an airspeed of 160 mph. It is to make a flight in a direction of 80° while there's a 20 mph wind from 310°. What will the airplane's actual heading be? I'd appreciate any help especially on how you

    asked on July 27, 2017
  58. College Chemistry

    The specific heat of a certain type of cooking oil is 1.75 cal/(g·°C). How much heat energy is needed to raise the temperature of 2.83 kg of this oil from 23 °C to 191 °C?

    asked on September 15, 2015
  59. physical science

    A 250.0 kg roller coaster car has 20,000.0 J of potential energy at the top of the hill. Neglecting frictional losses, what is the velocity of the car at the bottom of the hill?

    asked on July 3, 2008
  60. Math

    judy and ramey together have 42 stuffed animals. judy has 12 fewer animals than ramey. how many stuffed animals does each girl have?

    asked on February 4, 2010
  61. math

    Am I correct? Write the decimal as a percent: 0.01 A.10% B.1%**** c.0.1% d.0.01%

    asked on January 9, 2018
  62. Geometry

    A boat left dock A, traveled north for 10 miles, then 45 East of north for 20 miles and docked at B. A.How far north did the boat travel? How far east did it travel? B. Find the magnitude and direction of the direct-path vector AB. a. North 24.1 East 14.1

    asked on December 1, 2015
  63. math

    how wide is a rectangular table with a length of 2/3 yard and an area of 1/2 square yard

    asked on January 7, 2014
  64. physics

    A stone is dropped from the roof of a tall building. A person measures the speed of the stone to be 49 m/s when it hits the ground. What is the height of the building?

    asked on September 18, 2011
  65. geometry

    for that some problem: A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces. arn't you solving two parts because the board was cut in two?

    asked on February 27, 2011
  66. physics

    A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 3.6 m to the north, 2.8 m 45◦ north of east, and 2.2 m 59◦ west of south. Starting at the same initial point, an expert (lucky) golfer could make the

    asked on September 25, 2015
  67. AP Chemistry

    To have a buffer with a pH of 2.50, what volume of 0.510 M NaOH must be added to 100. mL of 0.230M H3PO4?

    asked on March 16, 2015
  68. geometrY

    to estimate the height of a tree, Dave stands in the shadow of the tree so that his shadow and the tree's shadow end at the same point. Dave is 6 feet 4 inches tall and his shadow is 15 feet long. If he is standing 66 feet away from the tree, what is the

    asked on February 27, 2011
  69. College Physics

    A skier is traveling at a speed of 39.7 m/s when she reaches the base of a frictionless ski hill. This hill makes an angle of 14° with the horizontal. She then coasts up the hill as far as possible. What height (measured vertically above the base of the

    asked on October 13, 2014
  70. Chemistry

    How many grams of hydrogen are there in 140g of ethylene (C2H4) gas?

    asked on October 29, 2018
  71. math

    if cos x= 2/5, what is the measure of less than x, to the nearest degree?

    asked on September 4, 2012
  72. Chemistry

    An empty flask weighs 128.632g. After vaporization of a sample of volatile liquid, at a measured temperature of 99.8 C. The flask is sealed, cooled to room temperature, and weighed. The mass is now 129.225g. The measured P atm is 757.7 torr. The flask is

    asked on April 6, 2011
  73. geometry.

    in a scale drawing of a school's floor plan, 6 inches represents 100 feet. If the distance from one end of the main hallway to the other is 175 feet, find the corresponding length in the scale drawing.

    asked on February 28, 2011
  74. Confidentiality in Allied Health Essay

    Can anyone help me find other resources to the graded project for Penn Foster? I have the AMA, and the Peen foster books. Anything else would be great.

    asked on November 28, 2010
  75. Physics URGENT

    A tennis ball with a velocity of +10.7m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a velocity of -5.9 m/s (to the left). If the ball is in contact with the wall for 0.009s,

    asked on February 14, 2011
  76. math

    The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare

    asked on February 24, 2013
  77. math

    Phillip, the proprietor of a vineyard, estimates that the first 9600 bottles of wine produced this season will fetch a profit of $5 per bottle. However, the profit from each bottle beyond 9600 drops by $0.0002 for each additional bottle sold. Assuming at

    asked on November 30, 2012
  78. Algebra

    Alice travels 6 times faster than Bill. Traveling in opposite directions, they are 714 miles apart after 6 hours. Find their rates of travel.

    asked on March 25, 2012
  79. math

    A rectangular photograph is mounted on a rectangular card. There is a border ofequal width around the photograph. The perimeter of the card is 40 centimeters longer than that of the photograph. Find the width of the border in centimeters.

    asked on March 5, 2013
  80. Physics

    A block of mass 21.0kg kg slides down a frictionless surface inclined at 33 ∘ ^\circ.To ensure that the block does not accelerate, what is the magnitude of the smallest force that you must exert on it?

    asked on February 19, 2014
  81. algebra

    A triangle has points A(2, 2), B(2, 4), and C(6, 3) and is reflected over the x-axis. A'B'C' are the coordinates of the reflected image. What is the B' coordinate

    asked on October 31, 2013
  82. Physics

    While watching ocean waves at the dock of the bay, Otis notices that 10 waves pass beneath him in 30 seconds. He also notices that the crests of successive waves exactly coincide with the posts that are 5 meters apart. What are the period, frequency,

    asked on March 14, 2011
  83. math

    Helping my son with %. I can't remember how. Here is the question. The baseball team has played 35 games so far this season. Of those games, they've won 21. What percent of the games played has the team won? Can someone help me with the formula

    asked on March 31, 2008
  84. Chemistry

    The following data was obtained from titrating a solution containing 25 mL of 0.0100 M MgCl2 solution, 1 mL of NH3OH buffer, and 10 drops of Calmagite with EDTA. Calculate the concentration of EDTA. Report the answer with three sig figs. Please help it

    asked on May 13, 2013
  85. math

    what do you get when you cross two ducks with a match?

    asked on March 14, 2008
  86. math

    Bert is planning to open a savings account that earns 1.6% simple interest yearly. He wants to earn exactly $160 in interest after 2 years. How much money should he deposit?

    asked on January 25, 2012
  87. math

    a rectangular prism has a width of 92ft. and a volume of 240ft^3. Find the volume of a similar prism with a width of 23ft. Round to the nearest tenth if necessary. a)3.8ft^3 b)60ft.^3 c)15ft.^3 d)10.4ft.^3 I am totally cinfused by this. Can somebody please

    asked on August 30, 2008
  88. algebra

    An archer releases an arrow at shoulder height. • Measure the distance from the fl oor to your shoulder when you are standing. Suppose you release an arrow and it hits the target at a point 5 ft above the ground. Sketch a possible parabolic path of

    asked on November 4, 2013
  89. geometry

    A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces.

    asked on February 27, 2011
  90. AP CHEM

    I have multiple... 1) If a metal ore contains 23.1% pure metal, how many pounds of pure metal can be obtained from 38 pounds of metal ore? Answer in units of pounds. 2) For the reaction 3 F2 + Cl2 → 2 ClF3 , what is the maximum amount of ClF3 (92.4482

    asked on October 13, 2015
  91. Trigonometry

    A plane flies 510 kilometers with a bearing of N43 degrees W from airport B to airport C. The plane then flies SW 790 kilometers from C to A which is due west of B. Find bearing of flight from C to A.

    asked on November 17, 2015
  92. statistics

    Table: Like Dogs Yes No Like cats Yes 194 21 No 110 10 For parts a-d give a fraction and % for answer. A.What % of all students like dogs? B. What % of students in the entire class like dogs and cats? C. What % of students who like cats like dogs? D. What

    asked on May 2, 2014
  93. Stats

    In one study of smokers who tried to quit smoking with nicotine patch therapy, 36 were smoking after one year after the treatment, and 34 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among smokers who

    asked on November 26, 2012
  94. chemistry

    A gas that occupies a volume of 6.75L at 89.0atm will occupy what volume at 68.55mm Hg if the temperature remains constant? (89.0atm/0.09atm)*6.75=6,680 V2=6680 Is this right??

    asked on March 8, 2010
  95. College Physics

    A hockey puck is sliding down an inclined plane with angle θ = 12.4° as shown in the figure below. If the puck is moving with a constant speed, what is the coefficient of kinetic friction between the puck and the plane?

    asked on October 13, 2014
  96. math

    merchandise was purchased at list for $3,460 with a single trade discount of 23%. What was the net price of this merchandise?

    asked on July 11, 2009
  97. social studies

    Am I correct? What effect did the passage of jim crow laws in the 1880s have on the lives of african americans? My answer was: *it made racial segregation legal in the south******* need answer by today

    asked on December 14, 2017
  98. physics

    Boxes are moved on a conveyor belt from where they are filled to the packing station 12.0 m away. The belt is initially stationary and must finish with zero speed. The most rapid transit is accomplished if the belt accelerates for half the distance, then

    asked on April 2, 2015
  99. College Physics

    Two crates are connected by a massless rope that passes over a pulley. If the crates have mass 33 kg and 82 kg, find their acceleration. If the system begins at rest, with the more massive crate a distance 12 m above the floor, how long does it take for

    asked on October 13, 2014
  100. Calculus

    A woman at point A on the shore of a circular lake with radius 2.5mi wants to arrive at the point C diametrically opposite A on the other side of the lake in the shortest possible time. She can walk at a rate of 3.25 mi/hr and row at a rate of 2 mi/hr.

    asked on April 30, 2013


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