Popular questions and responses by natasha
  1. English

    A speech about traditional african marriage is an advantage for men only,not women

    asked on July 23, 2015
  2. Physics

    At an instant when a soccer ball is in contact with the foot of a player kicking it, the horizontal or x component of the ball's acceleration is 810m/s^2 and the vertical or y component of its acceleration is 110m/s^2. The ball's mass is 0.43kg. what is

    asked on February 12, 2012
  3. physics

    When a 58g tennis ball is served, it accelerates from rest to a speed of 45m/s. The impact with the racket gives the ball a constant acceleration over a distance of 44cm. What is the magnitude of the net force acting on the ball?

    asked on February 12, 2012
  4. physics

    A dynamite blast at a quarry launches a chunk of rock straight upward, and 2.0s later it is rising at a speed of 15m/s. Assuming air resistance has no effect, calculate its speed A) at launch and B) 5.0s after lauch

    asked on January 29, 2012
  5. physics

    A container holds 2.2 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 7.7x10-3 kg bullet with a speed of 650 m/s. What is the Kelvin temperature of the gas?

    asked on January 28, 2013
  6. Language arts

    In an essay, explain how the alliteration in full fathom five helps convey the atmosphere of the poem. Think about where is the poem is set and what is described. Then, give two examples of alliteration in the poem, and describe how they add to the

    asked on March 7, 2017
  7. physics

    In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of 4.5m/s, grabs him. The tackler holds onto the receiver, and and the two move off together with a velocity of 2.6m/s. The

    asked on March 12, 2012
  8. physics

    Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 487 m in 216 s. Assume that they are moving in the +x

    asked on January 20, 2012
  9. physics

    A net force of 25N is applied for 5.7s to a 12-kg box initially at rest. Waht is the speed of the box at the end of the 5.7s interval?

    asked on February 18, 2012
  10. physics

    A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. at what speed was the sport utility vehicle traveling.

    asked on March 12, 2012
  11. Math

    Which of the following correctly lists angle pairs that have the same sums of 180 degrees & 90 degrees? A. adjacent angles, congruent angles B. complementary angles, vertical angles C. supplementary angles, complementary angles*** D. vertical angles,

    asked on February 25, 2015
  12. chemistry

    The equation Mg(s) 2HCl(aq)---MgCl2 (aq) H2(g) is an example of which type of reaction?

    asked on July 29, 2008
  13. physics

    Find the power delivered to an element at t=3 ms if the current entering its positive terminal is i=5cos60πt A and the voltage is V=3 di/dt

    asked on January 17, 2017
  14. physics

    A 20kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 80N and is directed at a angle of 30.0degrees above the horizontal. Determine the coefficient of kinetic friction.

    asked on February 13, 2012
  15. physics

    The drawing shows a square, each side of which has a length of L = 0.25 m. Two different positive charges q1 and q2 are fixed at the corners of the square. Find the electric potential energy of a third charge q3 = -4.35 10-8 C placed at corner A and then

    asked on July 4, 2012
  16. Math

    Find the next two terms for the sequence 2 6 10 14...

    asked on November 12, 2019
  17. Home Economics

    What are the three main areas of home economics?

    asked on June 11, 2016
  18. Elements of Psychology

    I need help on these questions. My answers have the < by them 1. In a typical neuron, sheaths of fatty tissue called _______ surround the axon. A. terminals C. synapse B. dendrites D. myelin

    asked on September 16, 2010
  19. Organic Chemistry

    Draw the structure of: (E)-1,2-dibromo-3-isopropyl-2-hexene My approach: I know how to answer this question in terms of basic nomeclature but I have no idea what (E) means in this.

    asked on February 5, 2010
  20. math

    use integer values of x from-3 to 3 to graph the equation y=2x^2=3 can you tell me the coordinates, then i can graph it, i just dont understand how to get them. thanks.

    asked on April 10, 2017
  21. physics

    A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. (θ = 61.0°) Suppose the total mass of a chair and its occupant is 196 kg. the tension is 3961.97N Find

    asked on February 22, 2012
  22. Math

    A garden is measuring 12m by 16m is to have a path around it, increasing the total area to 285 square metre. what is the width of the path? I went like that (16+2x).(12+2x)= 285 4x^2+56x-93=0 I am stuck now

    asked on December 11, 2018
  23. physics

    (a) Just for fun, a person jumps from rest from the top of a cliff overlooking a lake. In falling through a distance H, she acquires a certain speed v. Assuming free-fall conditions, how much farther must she fall in order to acquire speed 2v? Express your

    asked on January 20, 2012
  24. Chem again

    The solubility of Acetanilide in hot and cold water is: Temperature.........Solubility in 100ml H20 100C....................5.5g 0C........................0.53g What is the maximum recovery if 5.0g of acetanilide is recrystallized from 100mL of water? My

    asked on March 8, 2010
  25. english literature

    what is the significance of the odan tree in africa?

    asked on September 22, 2016
  26. math

    Janet Home went to Citizen Bank. she borrowed $7000 at a rate of 8%. The date of the loan was September 20. Janet hoped to repay the loan on January 20. Assuming the loan is based on ordinary interest, Janet will pay back how much interest on January 20?

    asked on February 27, 2017
  27. Physics

    The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.7m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point

    asked on February 18, 2012
  28. physics

    A block with a mass of 0.5kg is pushed against a horizontal spring of negligible mass and spring constant 450 N/m until the spring is compressed a distance x. When it is released, the block travels along a frictionless, horizontal surface to the bottom of

    asked on March 28, 2012
  29. English

    1-2. My uncle decided to splurge and _____with a country club because golf is his favorite____.(affiliate,deficit) 3-4. Gail didn't ____from smoking cigarettes until her employer made not smoking ____.Keeping her job was a very good incentive to get her to

    asked on March 18, 2014
  30. Physics

    A grindstone of radius 4.0m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 12 rad/s over 4.0s. Assume that the angular acceleration is constant. What is the average angular speed of grindstone?

    asked on April 2, 2012
  31. physics

    Two charges, -17 and +3.6 µC, are fixed in place and separated by 3.2 m. a) At what spot along a line through the charges is the net electric field zero? Locate this spot relative to the positive charge. (Hint: The spot does not necessarily lie between

    asked on July 3, 2012
  32. physics

    Am 85kg jogger is heading due east at a speed of 2.0m/s. A 55kg jogger is heading 32 degrees north of east at a speed of 3.0m/s. Find the magnitude and direction of the sum of the momenta of the two joggers.

    asked on March 12, 2012
  33. physics

    A string has a linear density of 8.1 x 10-3 kg/m and is under a tension of 200 N. The string is 2.9 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c)

    asked on February 11, 2013
  34. chemistry

    If a balloon containing 3000 L of gas at 39C and 99 kPa rises to an altitude where the pressure is 45.5 kPa and the temperature is 16C, the volume of the balloon under these new conditions would be calculated using the following conversion factor ratios

    asked on July 29, 2008
  35. chemistry

    A mixture of gases at a total pressure of 95 kPa contains N2, CO2, and O2. The partial pressure of the CO2 is 24 kPa and the partial pressure of the N2 is 48 kPa. What is the partial pressure of the O2?

    asked on July 29, 2008
  36. physics

    A baseball (m = 151 g) approaches a bat horizontally at a speed of 39.8 m/s (89 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.05 ms, what is the average force exerted on the ball by

    asked on March 12, 2012
  37. physics

    An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts on a charge of -6.3 µC at this spot?

    asked on July 3, 2012
  38. Calculus

    Engr. Ramos is walking at the rate of 5m/sec along the diameter of of a circular courtyard. A light at one end of a diameter perpendicular to his path casts a shadow on the circular wall. How fast the shadow from the man to the center of the courtyard is

    asked on September 11, 2016
  39. chemistry

    Liquid hexane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 43.9 g of hexane is mixed with 57. g of oxygen. Calculate the minimum mass of hexane that could be left over by the chemical reaction. Round your

    asked on March 7, 2015
  40. Chemistry

    In a laboratory activity, a student team measures the heat released by burning heptane. Using the following data, calculate the molar heat of combustion of heptane in kJ/mol: Mass of water - 179.2 g Initial water temperature - 11.6 degrees C Final water

    asked on April 21, 2008
  41. physics

    A two staged rocket moves in space at a constant velocity of 4900m/s. The two stages are then separated by a small explosive charge between them. Immediately after the explosion the velocity of the 1200kg upper stage is 5700m/s in the same direction as

    asked on March 12, 2012
  42. Chemistry

    500ml of 0.250M Na2SO4 solution is added to an aqueous solution of 15.00 g of BaCl2 resulting in the formation of white precipitate of BaSO4. How many moles and how many grams of BaSO4 are formed?

    asked on August 9, 2012
  43. algebra 1

    LaTasha was presented with the following data set and argued that there was no correlation between x and y. Is LaTasha correct? Use the regression equation to explain your reasoning.

    asked on November 29, 2016
  44. English

    What is comparative and superlative For: Tired For comparative I think it is more tired And for superlative more tiring?

    asked on November 28, 2018
  45. physics

    A moving particle encounters an external electric field that decreases its kinetic energy from 9100 eV to 6630 eV as the particle moves from position A to position B. The electric potential at A is -59.5 V, and the electric potential at B is +26.1 V.

    asked on July 4, 2012
  46. physics

    By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, with v1 = 3.15 m/s and v2 = 1.50 m/s. As the plate falls, its momentum has only a vertical component, and no component parallel to the floor.

    asked on March 13, 2012
  47. biostatistics

    among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. Assume the number of coffee drinks per day follows a normal distribution. a. What proportion drinks 2 cups per day or more? b. What proportion drink no more

    asked on November 4, 2011
  48. Physics

    A 9.67-m ladder with a mass of 25.0 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 242 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular

    asked on April 18, 2012
  49. Statistics

    Biologists studying the healing of skin wounds measured the rate at which new cells closed a razor cut made in the skin of an anesthetized newt. Here are data from 18 newts, measured in micrometers per hour:

    asked on April 25, 2007
  50. Physics

    A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 45.0 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 March 14, 2012
  51. chemistry

    an ionic equation has 2H+(AQ)on the left side and H2(g) on the right. Are these species spectators? explain.

    asked on October 15, 2012
  52. Physics

    A car accelerates uniformly from rest to 21.0 m/s in 6.1 s along a level stretch of road. Ignoring friction, determine the average power required to accelerate the car if the weight of the car is the following. A) 8.0e3N B) 1.2e4N (The answer needs to be

    asked on March 12, 2012
  53. Chemistry

    How many grams of nitric acid (HNO3) must be dissolved in 740 mL of water to make a solution with a pOH = 8.3?

    asked on May 12, 2013
  54. physics

    The (nonconservative) force propelling a 1.50 103-kg car up a mountain road does 5.10 106 J of work on the car. The car starts from rest at sea level and has a speed of 31.5 m/s at an altitude of 1.90 102 m above sea level. Obtain the work done on the car

    asked on March 14, 2012
  55. math

    16a - 5b - (-6a - 15b) - (-4b)

    asked on September 15, 2007
  56. math

    find the constant of proportionality and unit rate for the data in the table. Then write the equation to represent the relationship between time t and distance d Time Distance 2 t 90 miles 3 hrs 135 miles 5 hrs 225 miles 6 hrs 270 miles i need to show how

    asked on April 4, 2017
  57. physics 2

    An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts on a charge of -6.3 µC at this spot?

    asked on July 2, 2012
  58. Statistics

    Across the USA, results for these exams are normally distributed. What does that mean and why is this the case? If you were to create a histogram of all GRE scores, what would you expect the histogram to look like? Would it be symmetrical? Would it be bell

    asked on December 16, 2015
  59. chemistry

    Consider an iron cube and an aluminum cube. If the two cubes were at the same temperature, how would the average kinetic energy of the particles in iron compare with the average kinetic energy of the particles in aluminum?

    asked on July 29, 2008
  60. chemistry

    If a total of 13.5 mol of NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of CO2 and Na3C6H5O7 will be produced? 3NaHCO3(aq) + C6H8O7(aq) ƒ{ƒ®3CO2(g) + 3H2O(s) +Na3C6H5O7(aq)

    asked on July 29, 2008
  61. English

    Are the commas placed correctly in (A) or (B)? (A) The reason is often that the interviewer wants an overview, or opening statement summarizing how your skills, experiences and background are a good fit for the internship. (B) The reason is often that the

    asked on December 21, 2018
  62. Physics

    Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as shown below, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic

    asked on March 13, 2012
  63. physics

    An 18-year-old runner can complete a 10.0 km course with an average speed of 4.58 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.36 m/s. How much later (in seconds) should the younger runner start in order to finish the

    asked on January 20, 2012
  64. math

    find the constant of proportionality and unit rate for the data in the table. Then write the equation to represent the relationship between time t and distance d Time Distance 2 hrs 90 miles 3 hrs 135 miles 5 hrs 225 miles 6 hrs 270 miles i need to show

    asked on April 4, 2017
  65. physics

    A spherical surface completely surrounds a collection of charges. Find the electric flux (with its sign) through the surface if the collection consists of (a) a single +1.80 × 10-6 C charge, (b) a single -8.20 × 10-6 C charge, and (c) both of the charges

    asked on February 25, 2013
  66. calc

    a closed box has a base twice as long as it is wide.if its volume is 100 in cubed,express its surface area as a function of the width x of its base.

    asked on August 26, 2011
  67. calculus

    a farmer has a 1500 feet of fencing in his barn.he wishes to enclose a rectangler pen,subdivided in two regions by a section of the fence down the middle,parallel to one side of the the area enclosed by the pen as a function of its width

    asked on August 26, 2011
  68. algebra 2

    4p + 2q = 8 and q = 2p +1 solve by substitution

    asked on October 18, 2012
  69. calc

    a 1 mile racetrack has two semicircula ends connected by straight the area enclosed by the track as a function of its semi circular radius.determine its domain.

    asked on August 26, 2011
  70. Calculus

    A statue 5m high is standing on a base 8m high. Is an observer's eye is 2.5 m above the ground, how far should he stand from the base of the statue in order that the angle between his lines of sight to the top and bottom of the statue be a maximum.

    asked on August 29, 2016
  71. Physics

    A husband and Wife take turns pulling their child in a wagon along a horizontal sidewalk. Each exerts a constant force and pulls the wagon through the same displacement. They do the same amount of work, but the husband's pulling force is directed 58

    asked on February 26, 2012
  72. English

    How is Ernest Gaines effective as a storyteller in A Lesson Before Dying? Are there any stylistic elements from the novel to support that?

    asked on July 8, 2015
  73. chemistry

    The volume of a gas is 250 mL at 340.0 kPa pressure. What will the volume be when the pressure is reduced to 50.0 kPa, assuming the temperature remains constant?

    asked on July 29, 2008
  74. chemistry

    why the suction of a vacuum filtration apparatus is broken before the vacuum is turned off

    asked on March 12, 2019
  75. statistics

    2. Assume that the population proportion of adults having a college degree is 0.35. A random sample of 200 adults is to be selected to test this claim. A) What is the shape, mean, and standard deviation of the sampling distribution of the sample proportion

    asked on August 17, 2010
  76. chemistry

    A sample of gas occupies 17 mL at -112C. What volume does the sample occupy at 70C?

    asked on July 29, 2008
  77. physics

    Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.7 kg · m2 and an angular velocity of +7.3 rad/s. Disk B is rotating with an angular velocity of -9.5 rad/s. The two disks are then linked together without the aid of any

    asked on April 18, 2012
  78. science

    What charge exists on a test charge that experiences a force of 2.2 10-8 N at a point where the electric field intensity is 1.0 10-4 N/C? what formula do i use??

    asked on January 30, 2008
  79. physics

    The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the wire exerts two forces and ' on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 17.0

    asked on February 21, 2012
  80. math

    how do you express the side length of a square as a radical, in simplist form, if the area is 252 ft. squared?

    asked on October 30, 2016
  81. Chem

    using math expressions, define the following: Ka,pKa, pKb, Kb and pKw

    asked on January 1, 2012
  82. Organic Chemistry

    what is the lewis structure for this: CH3OH2+ I tried drawing one but I got my formal charges wrong, and it didn't add up

    asked on January 21, 2010
  83. accounting

    The Anderson Company has sales of $4,500,000. It also has invested assets of $2,000,000 and operating expenses of $3,600,000. The company has established a minimum rate of return of 7%. What is Anderson Company's profit margin? 18% 44.4% 20% 80%

    asked on August 14, 2009
  84. physis

    The magnitudes of the four displacement vectors shown in the drawing are A = 13.0 m, B = 11.0 m, C = 12.0 m, and D = 27.0 m. Determine the magnitude and directional angle for the resultant that occurs when these vectors are added together.

    asked on January 20, 2012
  85. PLZ Check my Science Project's summary?!

    The following r the instructions to my Project: - Compose a scientific summary of your method, observations, data, and conclusions. In addition, be sure to answer the questions below in your report. 1. Why does the first method for determining volume work

    asked on January 4, 2016
  86. chemistry

    A breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 101.4 kPa ifpHe = 82.5 kPa and pCO2 = 0.4 kPa

    asked on July 29, 2008

    a. Calculate the delta H, delta G, and equilibrium constant for the reaction of methane with Cl2 to give CH3Cl and HCl. Use the following information for your calculations: Bond Dissociation Energies: CH3-H (104.8kcal/mol), Cl-Cl(59.0 kcal/mol),

    asked on October 30, 2011
  88. Physics

    Can you think of any ways to measure instantaneous speed directly?

    asked on January 29, 2012
  89. Science

    A mixture is prepared by adding 100 ml of 0.10M Na2CrO4 to of ).10 N AgNO3. A precipitate forms in this mixture. The precipitate is separated from the mixture by filtration. Question: What quantity of solid product is produced?

    asked on November 2, 2012
  90. physics

    Some bacteria are propelled by biological motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.70e-8 m, and a tangential speed at the rim of 2.32 e-5 m/s. a) What is the angular speed (the

    asked on March 30, 2012
  91. 11th grade

    Sodium Vapor lamps emit a characteristic yellow light . What can we deduce about sodium atoms, based on this observation?

    asked on November 1, 2010
  92. physics

    The drawing shows box 1 resting on a table, with box 2 resting on top of box 1. A massless rope passes over a massless, frictionless pulley. One end of the rope is connected to box 2, and the other end is connected to box 3. The weights of the three boxes

    asked on February 21, 2012
  93. Computer

    How does computer manage input and output devices with respect to Windows

    asked on December 22, 2018
  94. Algebra

    Use arrow notation to wrote a rule for this translation. the cornites used to be a= 1,3 b= 4,5 c= 3,1 but then were shifted 1 unit to the right and 2 units down. The aigted coordinates are a= 2,1 b= 5,2 c= 4,-1 I dont understand the rule part.

    asked on April 10, 2017
  95. Math

    If a 60 kg man is riding a Monarch ergometer at 50 rpm and the resistance is 2.0 kg, what is the power output?

    asked on October 6, 2013
  96. Physics

    The earth has a radius of 6.38 106 m and turns on its axis once every 23.9 h. A. What is the tangential speed (in m/s) of a person living in Ecuador, a country that lies on the equator? (b) At what latitude (i.e., the angle θ in the drawing) is the

    asked on March 30, 2012
  97. physics

    A steroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 4.5e4kg and the force causes the speed to change from 7100 to 5500m/s. (A) What is the work done by the force? (B)

    asked on February 26, 2012
  98. Chemistry

    Sodium Vapor lamps emit a characteristic yellow light . What can we deduce about sodium atoms, based on this observation? Please help!!

    asked on November 1, 2010
  99. chemistry

    A rigid container of O has a pressure of 340 kPa at a temperature of 713 K. What is the pressure at 273 K?

    asked on July 29, 2008
  100. physics

    In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.31 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an

    asked on February 22, 2012


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