1. English

    What is the corruption Ronald Reagan is hiding in his Berlin Wall speech? What is the bad thing he's hiding?

    asked by Joes on January 5, 2016
  2. science

    what is the height of a rock wall that is casting a 10ft shadow if a 6 ft bird watcher is casting a 14 ft shawdow

    asked by sophia on May 8, 2011
  3. algebra

    In a natural gas pipeline, the velocity v (in m/s) of the gas as a function of the distance x (in cm) from the wall of the pipe is given by v = 5.2x − x^2 . Determine x for v = 4.8 m/s.

    asked by Linda on April 13, 2015
  4. math

    If the ladder reaches a height of 12 meters up the wall and has its foot 5meter away from it so can you please help me to calculate the length of the ladder

    asked by prodigy on October 26, 2015
  5. physics

    a wooden box weighing 286N is pushed across the floor by a workman who exerts a horizontal force of 143N. If the force of friction between the box and the floor is 28N, what is the acceleration (in meters per second) of the box?

    asked by kassy on October 3, 2016
  6. physics

    You push a 8.00 kg suitcase across a smooth horizontal floor applying a force directed 31.5 degrees below the horizontal. Someone measures the acceleration of the suitcase to be 1.73 m/s2. Assuming g = 10.0 m/s2, what is the normal force the ground exerts

    asked by layla on September 25, 2012
  7. physics

    A boy exerts a horizontal force of 2nt to pull his 2kg sled over the snow. If he gives someone a ride on his sled and he has to exert a 12nt force to pull the sled, how much does that person weigh and what is their mass?

    asked by Elise on January 11, 2011
  8. calculus

    karen hits a tennis ball with an initial velocity of 42 feet per second an at angle of 16 degree with the horizontal from a height of 2 feet. she is 20 feet from the net and the net is 3 feet. will the ball go over the net?

    asked by BK on April 8, 2015
  9. physics

    A 45.0 g golf ball is released 2.50 m above the ground. The velocity of the golf ball when it hits the ground is

    asked by oo on July 31, 2014
  10. physics

    wooden box weighing 271 N is pushed across the floor by a workman who exerts a horizontal force of 144 N. If the force of friction between the box and the floor is 28 N, what is the acceleration (in meters/second^2) of the box?

    asked by Anonymous on March 1, 2012
  11. physics

    A wooden box weighing 271 N is pushed across the floor by a workman who exerts a horizontal force of 144 N. If the force of friction between the box and the floor is 28 N, what is the acceleration (in meters/second^2) of the box?

    asked by phil on March 7, 2012
  12. physics

    A wooden box weighing 281 N is pushed across the floor by a workman who exerts a horizontal force of 166 N. If the force of friction between the box and the floor is 21 N, what is the acceleration (in meters/second^2) of the box?

    asked by nm on March 8, 2011
  13. Physics

    A ball on the end of a string travels in a horizontal circle at a constant speed. The circle has a circumference of 3 m, the ball has a speed of 2 m/s, and the centripetal force is 4 N. How much work is done on the ball each time it goes around? A) zero B)

    asked by Crystal on November 30, 2011
  14. Physics

    A 570.0 g ball moves in a vertical circle on a 103.0 cm-long string. If the speed at the top is 4.30 m/s, then the speed at the bottom will be 10.65 m/s. (you'll learn how to show this Chapter 10.) What is the gravitational force (in N) acting on the ball?

    asked by :( on October 17, 2011
  15. physics

    An engine moves a boat through the water at a constant speed of 16 m/s. The engine must exert a force of 7.0 103 N to balance the force that water exerts against the hull. What power does the engine develop? answer:___ kW

    asked by Merlin on April 26, 2011
  16. Phys.1200

    Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 73.0 N, the second a force of 95.0 N, friction is 14.0 N, and the mass of the third child plus wagon is 23.0 kg.

    asked by Heba on February 20, 2019
  17. English - to JJ

    If my thesis is Social networking is a powerfull force in modern society. It helps us stay connected with friends, even if we don't show them the 'real' us and it has shaped current events and our views on these events... will my topic be about facebook or

    asked by Anna on April 1, 2011
  18. PHYSICS

    Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #7: A 30 kg ball is launched at an angle of 15 degrees

    asked by Anna on March 7, 2013
  19. physics

    Calculate the force needed to bring a 1070–kg car to rest from a speed of 89.0 km/h in a distance of 110 m (a fairly typical distance for a non-panic stop). Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.34

    asked by stephanie on November 14, 2017
  20. science

    1.)a basketball momentarily changes shapes as it bounces off the floor. this is due to balanced forces acting on the ball. True (answer) false 2.) a ball slowing down as it roles across the carpet is an example of what ? (1 point) a.)balanced force

    asked by Hannah Marie on October 8, 2014
  21. Science Physics

    Sophia exerts a steady 40-N horizontal force on a 8-kg box resting on a lab bench. The box slides against a horizontal friction force of 24 N. Show that the box accelerates at 2 m/s2.

    asked by Peg on May 17, 2014
  22. physical science

    Sophia exerts a steady 40-N horizontal force on a 8-kg box resting on a lab bench. The box slides against a horizontal friction force of 24 N. Show that the box accelerates at 2 m/s2.

    asked by alex on November 9, 2014
  23. physics

    Sophia exerts a steady 40-N horizontal force on a 8-kg box resting on a lab bench. The box slides against a horizontal friction force of 24 N. Show that the box accelerates at 2 m/s2.

    asked by Cassie on April 21, 2013
  24. Physics

    Sophia exerts a steady 40-N horizontal force on a 8-kg box resting on a lab bench. The box slides against a horizontal friction force of 24 N. Show that the box accelerates at 2 m/s2.

    asked by Cassie on April 21, 2013
  25. algebra

    H(t)= -80t2+340t-260 (in feet) How many seconds will pass before the ball hits the ground?

    asked by kat on February 3, 2013
  26. Physics

    You throw a ball downward from a window at a speed of 1.8 m/s. How fast will it be moving when it hits the sidewalk 2.8 m below?

    asked by James on September 2, 2008
  27. physics

    You throw a ball downward from a window at a speed of 2.7 m/s. How fast will it be moving when it hits the sidewalk 2.8 m below?

    asked by julie on October 15, 2013
  28. Physics

    You throw a ball downward from a window at a speed of 2.7 m/s. How fast will it be moving when it hits the sidewalk 2.9 m below?

    asked by Nancy on September 18, 2012
  29. physics

    You throw a ball downward from a window at a speed of 1.9 m/s. How fast will it be moving when it hits the sidewalk 2.2 m below?

    asked by Anonymous on September 21, 2010
  30. physics

    You throw a ball upward from a window at a speed of 2.9 m/s. How fast will it be moving when it hits the sidewalk 2.2 m below?

    asked by Anonymous on September 21, 2010
  31. physics

    You throw a ball downward from a window at a speed of 2.0 m/s. How fast (in m/s) will it be moving when it hits the sidewalk 2.5 m below?

    asked by me on September 4, 2018
  32. MATH

    FOOTBALL. During a field goal attempt, the function h(d)= -0.02d+ 0.9d models the height, h(d) meters, of a football in terms of the horizontal distance, d meters, from where the ball was kicked. Find the horizontal distance the ball travels until it first

    asked by Jeanine on July 13, 2008
  33. physics

    A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that the distance to the wall of the cave is 17 m.

    asked by Scott m on November 8, 2012
  34. Physics

    He is standing at the edge of a rose garden at H = 4.62 m below her window and at D = 5.21 m from the base of the wall. How fast are the pebbles going when they hit her window?

    asked by Madison on January 21, 2015
  35. Physics

    A man of mass70Kg climbs a ladder which is 4m long leaning against a wall which is 3m high.Calculate the work done by this man

    asked by Sakhile on June 6, 2017
  36. phsycs

    A person shouts in a canyon. 3 s later they hear the echo. How far away is the canyon wall from which the sound wave was reflected? how do i do this problem?

    asked by Adam on July 19, 2012
  37. physics

    : stand with one arm and side of one foot pressed agaonst a wall.can you raose the other leg side ways? if not,why not

    asked by aliya on December 7, 2014
  38. Math

    you can paint 75 square feet of a surface every 45 minutes. Determine how long it takes you to paint a wall with the given dimensions. Please help me

    asked by Uhhh on March 1, 2019
  39. algebra

    A building has 5 walls each wall is between 170 and 190 feet long what is the total estimated distance around the building

    asked by Reva on March 6, 2012
  40. geometry

    A board on the wall in Jeremy's class has 4 right angles, 4 equal sides, and 2 pairs of parallel sides. Which quadrilateral is it?

    asked by Ms.Vargas on April 3, 2013
  41. Math

    a ladders 20m long touch a wall at height of 10m find the angel made by ladders ...

    asked by abhi on January 10, 2016
  42. Physics

    A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that it's distance from the cave wall is 19 m.

    asked by John on April 4, 2013
  43. physics

    What are the maximum values of the following when an incandescent 55-W light bulb (at 110 V) is connected to a wall plug labeled 110 V?

    asked by Sophia on August 3, 2011
  44. bio

    Which techinque would be used to look at distribution of protiens on the surface of a bacterial cell wall: Light Microscopy (LM) or Electron Microscopy (EM)

    asked by Anonymous on January 21, 2010
  45. Math

    termine the maximum height on the wall to which the firefighter can project water from the hose, if the speed of the water at the nozzle i�

    asked by Hhh on April 6, 2019
  46. Physics

    Hot air rises over a heated stove element. The wall behind the stove appears to shimmer. Explain.

    asked by Susan on February 15, 2011
  47. Physic

    One gallon of paint (3.79 Liters) covers an area of 26.0 m2. What is the thickness (in mm) of the fresh paint on the wall. Please help, I have no idea where to start thank you!

    asked by Kenny on August 25, 2012
  48. math

    A ladder 20 m long touches a wall at the height of 10m find the angle made by the ladder with the horizontal?

    asked by Anonymous on March 5, 2017
  49. physics

    A picture hangs motionless on a wall as shown in the Figure. If the picture has a mass of 5.0 kg, what are the tension forces in the wires?

    asked by Andres on October 22, 2010
  50. math

    The angle of elevation of a 15-ft ladder is 70°. Find out how far the base of the ladder is from the wall.

    asked by kristi on May 12, 2010
  51. socials

    can give me link to map of berlin when berlin wall close down.

    asked by Mohammad on December 5, 2011
  52. math

    if patrick can paint a wall in 40 minutes, what part of it can he paint in 1/2 hour? 1/4 1/2 2/3 3/4 4/5

    asked by robyne on May 10, 2010
  53. geometry

    If I want to cover a wall that is 10ft long by 3 ft high with 4"x4" tiles how many tiles do I need?

    asked by sue on February 8, 2012
  54. Math

    A ladder 12 m long is propped up against a building at an angle of 15°. How far up the wall does the ladder go?

    asked by Jen. on May 15, 2015
  55. Math

    A 5.0m ladder is leaning 3.1m up a wall. What is the angle the ladder makes with the ground?

    asked by Danielle on August 30, 2012
  56. Science (grade 7)

    our topic is cell -it is the main component of the plant cell wall

    asked by someone on October 6, 2016
  57. physics

    A 2.2 kg bowling ball is dropped vertically from a height of 1.5 m onto a long compression spring (k = 150 N/m) placed vertically underneath it. What is the maximum compression of the spring?

    asked by grey on June 4, 2014
  58. Maths

    in a class of 73 children, 43 play bowling, 44 play softball and 17 play neither sport? How many play only bowling?

    asked by Anonymous on October 26, 2016
  59. math

    A woman throws a cricket ball upwards into the air. The ball leaves the womans hand at 1.8m above the ground at speed of 9.7. It rises and then falls back to the ground. Considering the energies involved calculate the speed at the point it hits the ground.

    asked by joleen on December 15, 2010
  60. physics

    A baseball is thrown, leaving the baseball player’s hand 6.0 ft about the ground and at a 45 degree angle with respect to the horizon. The initial speed is 80 ft/s. Find the maximum height attained, the length of time the ball stays in the air, and the

    asked by mary on December 10, 2008
  61. Physics

    Astrology, that unlikely and vague pseudoscience, makes much of the position of the planets at the moment of birth. The only known force a planet exerts on earth is gravitational. (a) Calculate the gravitational force exerted on a 4.00 kg baby by a 90 kg

    asked by Heather on November 19, 2017
  62. Physics

    At the 2014 ALCS game 2, the Royals started their right-handed pitcher Wade Davis whose fastball typically reaches 94 mph. if his throwing motion covers 2.8m from the position where his arm starts to make forward motion to release position, and the mass of

    asked by Sarah on October 19, 2014
  63. Physics

    A 0.421-kg ball has an elastic, head-on collision with a second ball that is initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic

    asked by James on June 6, 2012
  64. Physics

    A 1200 kg car accelerates to the right at 7m/s2 along a special frictionless track. Determine the magnitude and direction of the force the engine exerts to accelerate the car? A wind blows heavy winds into the car's path.As a result the car's acceleration

    asked by Edward on July 18, 2011
  65. physics

    A MAN HOLDS A 178 N BALL IN HIS HAND, WITH THE FOREARM HORIZONTAL. HE CAN SUPPORT HE BALL IN THIS POSITION BECAUSE OF THE FLEXOR MUSCLE FORCE, M, WHICH IS APPLIED PERPENDICULAR TO THE FOREARM. THE FOREARM WEIGHS 22 N AND HAS A CENTER GRAVITY. FIND THE

    asked by kassy on November 8, 2016
  66. physics

    A 32 g ball rolls around a 40 cm diameter L-shaped track, shown in the figure below, at 60 rpm. Rolling friction can be neglected. What is the magnitude of the net force exerted on the ball?

    asked by Anonymous on April 11, 2011
  67. Physics

    A 0.145-kg baseball traveling 35.0 m/s strikes the catcher's mitt which, in bring the ball to rest, recoils backward 11.0 cm. What was the average force applied by the ball on the glove?

    asked by Steve on October 10, 2008
  68. Physics

    A 0.133 kg baseball traveling 30.6 m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 11.4 cm. What was the average force applied by the ball on the glove? (in N)

    asked by Madison on February 10, 2015
  69. Physics

    A 0.140 kg baseball traveling 39.0 m/s strikes the catchers mitt, which, in bringing the ball to rest, recoils backward 13 cm. What is the average force applied by the ball on the glove?

    asked by Mike on June 13, 2012
  70. HS Physics

    Please help...I know the direction is up, but I can't figure out the magnitude, except that its label is kg · m/s, I think. A 0.400-kg ball is dropped from rest at a point 1.80 m above the floor. The ball rebounds straight upward to a height of 0.730 m.

    asked by Tzana on October 15, 2010
  71. Physics

    Please help me out, I can't figure out the process for answering this question and my TA is of no help, A 0.11- ball is placed in a shallow wedge with an opening angle of 130 degrees,for each contact point between the wedge and the ball, determine the

    asked by Matthew on October 7, 2009
  72. Physics

    As you lift a chair to store is upside down on a desk, gravity exerts a force, mg, downward and you exert a force of the same magnitude upwards. The two forces are equal in magnitude and opposite in direction. From this is would appear that no work was

    asked by Becky on March 21, 2012
  73. physics

    A 53.0-kg person jumps from rest off a 12.0-m-high tower straight down into the water. Neglect air resistance. She comes to rest 3.00 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This

    asked by sal on July 10, 2013
  74. Pre- AP Physics

    The earth exerts a force of 1400 N on an orbiting communications satellite that is 35 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth? Answer in units of Newtons

    asked by Jaycee on November 4, 2012
  75. Physics

    A car weighing 1.1*10^4 N is parked on a 35 degree slope. Find the force tending to cause the car to roll down the hill. What is the force the car exerts perpendicular to the hill?

    asked by Corey on December 7, 2009
  76. Physics

    A horizontal force of 100 N pushes a 12kg block up a frictionless incline that makes an angle 25degrees with the horizontal. What is the normal force that the incline exerts on the block and what is the acceleration of the block? I found part (a) which is

    asked by Anonymous on September 20, 2010
  77. Calculus 3

    The ceiling of a building has a height above the floor given by z = 20 + 1 4 x, and one of the walls follows a path modeled by y = x3/2. Find the surface area of the wall if 0 ≤ x ≤ 40. (All measurements are in feet. Round your answer to two decimal

    asked by Baba on May 1, 2011
  78. Living environment

    acidic substance secreted by glands in the stomach wall is it pepsin enzyme that breaks down starch into maltose is it salivary amylase organ in which bile is stored is it gallbladder

    asked by Justin on March 13, 2012
  79. Biology

    An organism that is eukaryotic, multicellular, and lacks a cell wall would be classified in which kingdom. Protista Fungi Animalia Archaebacteria Eubacteria I really don't know which ones it is I tried 13 times. Choose all the applies.

    asked by Kay on March 18, 2019
  80. Physics ( check answers)

    Question 1 A 0.50 kg football is thrown with a velocity of 15 m/s to the right. A stationary receiver catches the ball and brings it to rest in 0.020s . What is the force exerted on the receiver? So I used mvf-mvi/change(t) I got 375 for that one...

    asked by Pablo on December 9, 2010
  81. Physics ( check answers)

    Question 1 A 0.50 kg football is thrown with a velocity of 15 m/s to the right. A stationary receiver catches the ball and brings it to rest in 0.020s . What is the force exerted on the receiver? So I used mvf-mvi/change(t) I got 375 for that one...

    asked by Pablo on December 9, 2010
  82. physics

    The top of the pool table is 2.80 ft from the top of the floor. A pool player hits the ball and it lands 14.25 ft from the edge of the table. Calculate his break speed and the speed at which the ball hit the ground

    asked by shawni on September 11, 2012
  83. math

    Please help me with the following problem, I have veiwed the answers to the other problems like this one and were told they were incorrect: If you do not consider air resistance, gravity causes a falling object to descend a distance of (9.8)t2 where t is

    asked by IN NEED OF HELP on January 25, 2012
  84. Physics

    Three blocks on a frictionless horizontal surface are in contact with each other, as shown below. A force F is applied to block A (mass mA). (a) Draw a free-body diagram for each block. Determine (b) the acceleration of the system (in terms of mA, mB, mC),

    asked by Anonymous on October 22, 2010
  85. physics

    A .5kg ball on the end of a string is revolving uniformly in ahorizontal circle of radius 1m. The ball makes 2 revolustion in a second. a) determine the linear (tangential) speed of the ball. For this part of the question would I do this: v=d/t =1m/.5s

    asked by Tammy on October 31, 2007
  86. English

    Can you please check if everything is OK in these sentences? Thank you. 1) He can’t sleep for hours but then he falls asleep after drinking the drugged water. When he wakes up he can see the size of his prison and realizes that the pit is about half the

    asked by Henry2 on September 27, 2011
  87. Conceptual Physical Science

    A bat flying in a cave emits a sound and receives its echo 0.1s later. Show that the distance to the wall of the cave is 17m. Thanks!

    asked by Laticia on July 5, 2010
  88. physics

    What is the smallest size plane mirror a 184-cm {\rm cm}-tall person should buy to see himself if he mounts the mirror on a vertical wall?

    asked by Mel on April 1, 2014
  89. Physics

    A room with only one window is dark even at mid-day. Explain how you could use wall-paper, furnishings and mirrors to brighten the room.

    asked by Nabiha on January 16, 2009
  90. Geometry

    karen is buying wallpaper for one wall of her bedroom which is 12ft by 13ft if the wallpaper is sold in tolls of 5 ft each how many rolls will she need to purchase

    asked by Popppppmusic on April 22, 2014
  91. 12th grade Physics

    In an experiment, a car taveling at 88m/s,west slams into a wall and comes to a halt in 0.75 seconds. What is the car's acceleration vector?

    asked by Jane on October 7, 2008
  92. History The Great Wall of China

    I have been researching this question for a while and keep coming up with different answers. Can anyone shed some light on this question, please? What is the height and length of the Great Wall of China?

    asked by Hannah on June 13, 2010
  93. Physics

    A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that its distance from the cave wall is 19m.

    asked by Mickey Mouse on July 9, 2011
  94. science

    12-83. Determine the maximum height on the wall to which the firefighter can project water from the hose, if the speed of the water at the nozzle is 48ft/s

    asked by aaa on September 30, 2013
  95. math

    Emory is mounting 3 shelves of 12 3/4 in apart on a wall. If each board is 3/4 in. thick, what is the total vertical space occupied by the set of shelves?

    asked by lori on March 4, 2012
  96. calculus

    using the two existing corner sides of an existing wall, what is the maximum rectangular area that can be fenced by a fencing material 30 ft long?

    asked by ligas on October 9, 2015
  97. Social studies

    Show how each improvement helped the Qin dynasty. Improvement. Advantage 1. Road system 2. Canals 3. Great Wall

    asked by Leighton on June 4, 2012
  98. Physics

    The cannonball is fired at a speed of 45 and an angle of 35 . A cannonball that was accidentally dropped from the top of the castle wall hit the moat below in 1.8 .

    asked by jeff on April 20, 2013
  99. Physics

    A 0.075 kg ball in a kinetic sculpture moves at a constant speed along a motorized conveyor belt. The ball rises 1.32 m above the ground. A constant frictional force of 0.350 N acts in the direction opposite the conveyor belt's motion. What is the net work

    asked by Brian on December 9, 2010
  100. English

    Thank you very much for your help. Here are some more sentences I need to prepare for tomorrow. 1) The mirror is presented as a truthful object. When someone is mirroring in it (is it correct: or "when someone looks at himself in it?) it reflects the truth

    asked by Franco on March 7, 2010