1. physics

    A 45 m/s (100 mph) wind blows across the top of a flat-roofed house. Calculate the net force on the roof due to the pressure differential from inside the house to the outside. Assume that the pressure in the house is atmospheric pressure and that the roof

    asked by badgurl on January 6, 2013
  2. 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 by Natasha on December 11, 2018
  3. math

    a rectangular garden 30 m by 40 m has two paths of equal width crossing through it as shown. Find the width of each path if the total area covered by the path is 325 M^2 (m squared) help

    asked by sam on December 4, 2007
  4. Physics

    A Van de Graaff generator is a device for generating a large electric potential by building up charge on a hollow metal sphere. A typical classroom-demonstration model has a diameter of 30 cm. How much charge is needed on the sphere for its potential to be

    asked by MMM on April 1, 2015
  5. math

    A vertical mast is on top of building and is positioned 6 ft from the front edge. The mast casts a shadow perpendicular to the front of the building and the tip of the shadow is 90 ft from the front of the building. At the same time, the 24 ft building

    asked by John on April 1, 2017
  6. Physics

    My midterm is tomorrow and I have a couple questions that I need to study. Ive tried and tried and cannot figure these out. 1) A ball is dropped from a roof and takes 3.0s to reach the ground. Calculate the elevation of the roof above the ground in meters.

    asked by Mike on January 16, 2008
  7. physics

    A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 49.0 . The acceleration period lasts for time 10.0 until the fuel is exhausted. After that, the rocket is in free fall. What's the max height?

    asked by Uzz on September 28, 2011
  8. physics

    Hypothetically a pebble rolls off the roof edge of Golden Eagle Arena and falls vertically. Just before it reaches the ground, the pebble's speed is 17 m/s. Neglect air resistance and determine the height of Golden Eagle Arena's roof edge.

    asked by Anonymous on October 13, 2012
  9. physics

    Hypothetically a pebble rolls off the roof edge of Golden Eagle Arena and falls vertically. Just before it reaches the ground, the pebble's speed is 17 m/s. Neglect air resistance and determine the height of Golden Eagle Arena's roof edge.

    asked by Anonymous on October 13, 2012
  10. calculus

    A fence 4 feet tall runs parallel to a tall building at a distance of 5 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by zama on November 8, 2009
  11. Calculus

    A fence 6 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Pete on July 13, 2010
  12. Calculus

    A fence 3 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Alessandra on November 5, 2014
  13. calculus

    A fence 5 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by sonia on November 21, 2012
  14. Calc

    A fence 5 feet tall runs parallel to a tall building at a distance of 5 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Manny on April 5, 2009
  15. Math: Calculus

    A fence 6 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by REALLY NEED HELP!!!! on October 29, 2010
  16. Calculus

    A fence 8 feet tall runs parallel to a tall building at a distance of 6 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by JAY Z on April 30, 2014
  17. Calculus

    A fence 2 feet tall runs parallel to a tall building at a distance of 6 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Anonymous on October 28, 2011
  18. physics

    a person was climbing on a building.he slips 1 metre for every 5 metre he climb up. if the building is 53 metre high and he takes 5 seconds to climb 1 metre,find the total time taken by him to get on the top of the building.

    asked by Anonymous on April 9, 2014
  19. Math

    A fence 4 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Salman on November 7, 2009
  20. Calculus

    A fence 4 feet tall runs parallel to a tall building at a distance of 6 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Anonymous on October 28, 2011
  21. Calc Help Please

    A fence 2 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building? Help!

    asked by Anonymous on August 8, 2013
  22. Calculus

    fence 3 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Anonymous on November 6, 2014
  23. calculus

    A fence 5 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by sonia on November 21, 2012
  24. Calculus

    A fence 6 feet tall runs parallel to a tall building at a distance of 20 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Ashlyn on April 22, 2018
  25. Math

    A fence 3 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Anonymous on March 21, 2017
  26. Calculus

    A fence 4 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Anonymous on April 20, 2015
  27. Physics

    A tunnel of length L = 141 m, height H = 6.9 m high, and width 6.0 m (with a flat roof) is to be constructed at distance d = 60 m beneath the ground. The tunnel roof is to be supported entirely by square steel columns, each with a cross-sectional area of

    asked by Ray on November 3, 2009
  28. Algebra

    The length of a shadow of a building is 27 meters. The distance from the top of the building to the tip of the shadow is 38 meters. what is the height of the building?

    asked by William McKeithan on December 15, 2016
  29. Geometry

    A 10-meter ladder, is resting against the top of a building. If the bottom of the ladder is 4 meters from the building, how many meters tall is the building

    asked by Terrence on June 3, 2011
  30. physics

    A worker on a roof, 20.8 m above the ground, wants to drop a brick onto the back of a moving truck. The truck is moving at a constant velocity of 5.0 m/s alongside the building. The back of the truck is 1.2 m above the ground. How far from the point of

    asked by Anonymous on April 17, 2019
  31. English

    Thoreau included the following sentence in Walden: "There is some of the same fitness in a man's building his own house that there is in a bird's building its own nest." Which of the following statements rephrases his literal comparison as a metaphor? A. A

    asked by Sam on November 14, 2014
  32. IT

    Why is the waterfall model valuable in the management of information technology projects? Refer to "Arguments for the Waterfall Model" in http://en.wikipedia.org/wiki/Waterfall_model The waterfall model is a sequential software development model (a process

    asked by Maria on February 28, 2007
  33. Physics

    A rock is thrown vertically upward with a speed of 11.0 m/s from the roof of a building that is 70.0 m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? GOT THIS!!!! t=5.07s What is the speed of the

    asked by Josh on September 11, 2006
  34. religions

    i need to make a model of any famous mosque in the world first, i need help finding pictures of different mosques to see which one would be easy to work with (i need a nice picture, maybe 3D, so i can copy it and build my model according to it) second, i

    asked by y912f on May 12, 2009
  35. Physics

    Develop a model for the effective gas mileage (call it E) as a function of speed (S) for a ¡°typical¡± car (you should be able to find the necessary information to develop this model for your own car). This model should be valid for 55 ¡Ü S ¡Ü75

    asked by Henry on March 4, 2013
  36. Physics

    Santa Claus (mass = 150 kg) is leaning his sled(mass = 50 kg, length = 6 m) at an angle of 72° against the wall of the house to enter from the roof the living room. Considering a coefficient of friction of 0.29 between the ground and the sled and no

    asked by Chika on December 4, 2016
  37. English

    Thoreau included the following sentence in Walden: "There is some of the same fitness in a man's building his own house that there is in a bird's building its own nest." Which of the following statements rephrases his literal comparison as a metaphor? A. A

    asked by LaH on October 24, 2011
  38. math

    the white house built 1792 is the oldest federal building in washington dc the building has undergone extensive remodeling over years the main building is four stories high and is about 170 ft long by ft wide if a replica of the white house were made with

    asked by Franklin bash on December 11, 2011
  39. Math

    The white house, built 1792, is the oldest federal building in washington DC . The building has undergone extensive remodeling over the years. The main building is 4 stories high and is about 170 ft long by 85 ft wide. If a replica of the white house were

    asked by Nick on January 29, 2014
  40. Geometry

    John places a mirror on the ground between himself and an apartment building. He then stands so that he can see the top edge of the building in the center of the mirror. The center of the mirror is 6.10 meters from her feet and 18.30 meters from the

    asked by Jenny on June 27, 2011
  41. Math

    there is a path 7 meter wide outside around the square playground of side 60 meter each. find the area of the path...........?

    asked by J.B. on December 11, 2011
  42. physics

    A ball is thrown straight up in the air A) What is its velocity at the top of its path? B) What is acceleration at the top of its path

    asked by lisa on May 3, 2012
  43. maths

    If the lawn is 20xY metres and the path around the garden is 2 metres wide, what is the expression for the area of the path?

    asked by me on November 7, 2015
  44. Maths

    A model of a ship is made to a scale of 1:160 find the length of the ship if the length of its model is 1.2m, tthe area of deck of the ship if the area of deck of its model is 1.2m square,the volume of the ship if the volume of its model is 1.2m cube

    asked by Soju on December 27, 2017
  45. math

    a ladder is leaning againt the side of a building. The ladder is 10 feet away from the building and touches the building at a point 24 feet above the base. How long is the ladder?

    asked by mary ann on March 7, 2012
  46. Physics Please help!

    the coefficient of static friction between the coffee cup and the roof of a car is 0.28, If the maximum acceleration the car can have without causing a cup of coffee (on the top of the car) to slide is 2.7 m/s^. What is the smallest amount of time in which

    asked by Casey on January 5, 2012
  47. Physics Please help!

    the coefficient of static friction between the coffee cup and the roof of a car is 0.28, If the maximum acceleration the car can have without causing a cup of coffee (on the top of the car) to slide is 2.7 m/s^. What is the smallest amount of time in which

    asked by Casey on January 5, 2012
  48. physics grade 12

    we have a trebuchet. if the arm of the trebuchet fires in a circular motion with a radius of 2.0 m and the mass is 50kg on the other end of the arm. what will the speed of the 4 kg boulder be as it is launched into the air? assuming it is launched parallel

    asked by s.r on November 10, 2011
  49. physics grade 12

    we have a trebuchet. if the arm of the trebuchet fires in a circular motion with a radius of 2.0 m and the mass is 50kg on the other end of the arm. what will the speed of the 4 kg boulder be as it is launched into the air? assuming it is launched parallel

    asked by s.r on November 10, 2011
  50. Algebra

    In the old days there were elevator operators to transport passengers. Don Downs always started his day in the basement. He went up 20 floors to take his boss some coffee. Then he went down 8 floors to take a donut to his friend. He went up 7 floors to

    asked by samay on January 26, 2018
  51. 8th grade algebra

    You see a firefighter aim a fire hose from 4 feet above the ground at a window that is 26 feet above the ground. The equation h=-0.01d^2+1.06d+4 models the path of the water when h equals height in feet. Estimate, to the nearest whole number, the possible

    asked by Cassie on February 1, 2009
  52. Math

    A circular path around a lake has a diameter of 2,000 feet (ft). Pranotti jogs around the path 5 times for her morning run. How far does she run? Use 3.14 for ƒàƒnand round your answer to the nearest foot

    asked by Sadie on February 25, 2009
  53. Math

    Sam wants to find the height of a window in a nearby building but it is a cloudy day with no shadows. Sam puts a mirror on the ground between himself and the building. He tilts it toward him so that when he is standing up, he sees the reflection of the

    asked by Jiska on January 28, 2016
  54. Math

    It is known that if the deer population falls below a certain level, m, then the deer will become extinct. It is also known that is the deer population goes above the maximum carrying capacity, M, the population will decrease to M. (a) Discuss the

    asked by Jenny on April 20, 2012
  55. Science

    1. How is a model of an atom different from a real atom? A. A model of an atom is not as big as an actual atom. B. A model of an atom is the same as a real atom. C. A model of an atom is more complex than a real atom. D. A model of an atom is not as small

    asked by Amber on August 26, 2014
  56. physics

    n aircraft uses a rocket-assisted takeoff unit (RATO) that is capable of discharging 49.0 kg of gas in 15.0 s with an exhaust velocity of 1300 m/s. The 3000 kg aircraft, on an ordinary takeoff without RATO, requires a distance of 440 m to reach a lift-off

    asked by anonymus on August 30, 2018
  57. fraction

    Give examples of three categories of fraction models. What real models have you used that correspond to each of these? I pretty much understand the first part of this question: I know that the three models are set model, length or measurement model and

    asked by Ashley on March 17, 2008
  58. science- physics

    Two spheres are launched horizontally from a 1.1 m -high table. Sphere A is launched with an initial speed of 4.5 m/s . Sphere B is launched with an initial speed of 1.5 m/s . What is the distance that sphere A travels from the edge of the table? What is

    asked by Laura on October 15, 2015
  59. history

    Why did the building of the Transcontinental Railroad have to be shelved for a few years? Iron rails rusted, and the wait for steel rails was extremely long. There were not enough workers to complete the building process. Native American attacks made the

    asked by Michael on December 17, 2018
  60. English

    1. Look at the top left building in the picture. 2. Look at the bottom right building. It's name is Brownstone Middle School. When was it built? It was built 70 years ago. 3. What about Town Bank? We can not get any information from the script, so we don't

    asked by rfvv on November 25, 2009
  61. Math

    At 6:00 A.M. the temperature was 33°F. By noon the temperature had increased by 10°F and by 3:00 P.M. it had increased another 12°F. If at 10:00 P.M. the temperature had decreased by 15°F, how much does the temperature need to rise or fall to

    asked by Maddie on February 20, 2018
  62. statistics

    The space shuttle is launched 9 times a year with a break down occurring 1/10 of the time. What is the probability that two randomly selected space shuttles launched 9 times a year and both having accidents occurring in that year?

    asked by Anonymous on February 10, 2014
  63. Calculus

    A ladder 15 feet long is leaning against a building so that end X is on level ground and end Y is on the wall. Point 0 is where the wall meets the ground. X is moving away from the building at a constant rate of 1/2 foot per second. (a.) Find the rate in

    asked by Amy on February 5, 2012
  64. algebra

    Jenn will use 18 connecting cubes to make a model of a park. The model will b in the shape of a rectangle and will have the height of one cube. In how many different ways can Jenn make the model of the park ?

    asked by Anonymous on December 7, 2011
  65. Algebra

    An art student wants to make a model of the classroom. The length of the classroom is 2.4 times its width .The length of the students model is 42 in What should the width of the model be? My answer is 17.5 inches

    asked by Faye on August 25, 2014
  66. Math

    A model airplane is made on a scale of 1:128. A)what is the scale factor? b) if the airplane model has a wingspan of 30cm,what is the wingspan of the actual plane? use model over original

    asked by Cleopatra on April 2, 2014
  67. University Physics

    Building A and Building B are 30m away from each other, on the 4th floor; 35m high, someone has set up a slingshot from the window on the 4th floor of building A and is trying to sling a balloon into the window directly across from them in building B. the

    asked by Britt on March 5, 2012
  68. probability and statistics

    For the model X=Θ+W, and under the usual independence and normality assumptions for Θ and W, the mean squared error of the LMS estimator is 1(1/σ02)+(1/σ12), where σ02 and σ12 are the variances of Θ and W, respectively. Suppose now that we change

    asked by AAA on April 1, 2017
  69. Calculus

    A fence 5 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building? [Hint: Determine the length of a ladder

    asked by Z32 on June 22, 2009
  70. TRIG Help help help test tommarow

    A TV tower stands on top of the Empire State building. From a point (on the ground) 1150 feet from the base of the building, the angle of elevation to the top of the TV tower is 52 degrees. If the building is 1250 feet tall, what is the length of the TV

    asked by Precious on May 22, 2013
  71. Math

    A model airplane is shot up from a platform 1 foot above the ground with an initial upward velocity of 56 feet per second. The height of the airplane above ground after t seconds is given by the equation h=-16t^+56t+1, where h is the height of the airplane

    asked by Ben on July 24, 2014
  72. Science

    A horizontal projectile with mass of 19.0kg is launched from a height of 7.0m above ground level with a horizontal speed of 250.0m/s. A)During projectile's flight, what forces are acting on it? B)What are the sizes & directions of the forces? C)Assuming

    asked by Jenny on June 29, 2008
  73. Physics

    A 6.2 kg model rocket is traveling horizontally and due south with a speed of 20.3 m/s when it explodes into two pieces. The velocity of one piece, with a mass of 1.6 kg, is v1 = (-12 m/s)i + (30 m/s)j + (15 m/s)k, with i pointing due east, j pointing due

    asked by Nat on February 24, 2014
  74. English

    I have to add prepositional phrases to the following sentences. Please check to see if correct. 1.The carpenter repaired the roof. 2.The coach explained the play. 1.The carpenter repaired the roof in the house. 2.The coach down the street explained the

    asked by Chris on November 3, 2010
  75. physics

    A ball is thrown upward from the top of a 40.0 m tall building. The ball's initial speed is 12.0 m/s. At the same instant, a person is running on the ground at a distance of 31.0 m from the building. What must be the average speed of the person if he

    asked by sandhu on September 17, 2009
  76. Physics

    A ball is thrown upward from the top of a 24.6 m tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 31.2 m from the building. What must be the average speed of the person if he is to

    asked by Jenn on September 23, 2012
  77. physics

    A ball is thrown upward from the top of a 24.4-m-tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 30.2 m from the building. What must be the average speed of the person if he is to

    asked by mae on August 30, 2011
  78. Physics

    A ball is thrown upward from the top of a 50.0 m tall building. The ball's initial speed is 12.0 m/s. At the same instant, a person is running on the ground at a distance of 44.0 m from the building. What must be the average speed of the person if he is to

    asked by Kelly on February 5, 2012
  79. physic

    A ball is thrown upward from the top of a 24.4 m tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 31.4 m from the building. What must be the average speed of the person if he is to

    asked by Anonymous on August 29, 2012
  80. math

    A path 3m wide surrounds a rectangular garden 15 m wide and 18 mlong .what is the area of the path ?

    asked by cinthya on July 16, 2009
  81. Calc

    A particle moves along a path described by x=cos³t and y=sin³t. The distance that the particle travels along the path from t=0 to t=π/2 is... Thank you!

    asked by Erica on April 25, 2011
  82. Trigonometry

    A building 200 feet tall casts an 80 ft long shadow. If a person looks down from the top of the building which of the following is the measure of the angle between the end of the shadow and the vertical side of the building to the nearest degree? I

    asked by Ben on February 23, 2017
  83. math

    From A, due east of the building, the angle of elevation of the top is 45 degree. From B, southwest of the building, the angle of elevation is 30 degree. If AB=250m, find the height of the building.

    asked by somay on January 25, 2016
  84. math

    From A, due east of a building, the angle of elevation of the top is 45 degree. From B, southwest of the building , the angle of elevation is 30 degree. If AB=250m, find the heigt of the building.

    asked by Anonymous on January 25, 2016
  85. calculus

    A fence 8 feet tall stands on level ground and runs parallel to a tall building. If the fence is 1 foot from the building, find the shortest ladder that will extend from the ground over the fence to the wall of the building.

    asked by Erica on October 11, 2012
  86. Algebra

    A 10 foot ladder is to be placed against the side of a building. The base of the ladder must be placed at an angle of 72degree with the level ground for a secure footing. Find to the nearest inch, how far of the ladder should be from the side of the

    asked by Zing on February 7, 2012
  87. Psychology

    Describe how a person moves through each of the five stages of Levinger's ABC's of relationships model. As you write your description, include answers to the following questions; What do you think people look for in the attrction stage? How do people work

    asked by Donna on July 17, 2008
  88. Math

    Sam wants to find the height of a window in a nearby building but it is cloudy. Sam puts a mirror on the ground between himself and the building. He tilts it toward him so that when he is standing up he sees the reflection of the window. The base of the

    asked by Ashley on March 10, 2016
  89. Physics

    Mars' moon Phobos has a mass of 1.07x1016 kg and a mean radius of 11.1 km. Let's say our rocket blasts off from the surface of Phobos when Phobos is 9500 km from the surface of Mars. Does the rocket have to work harder to escape from the gravitational pull

    asked by Raj on October 21, 2007
  90. Economics

    The table below shows annual demand (in 1,000,000 units per year) for Widgets. Use this information to calculate a constant growth forecasting model. Use your growth model to forecast demand for the years 1995 and 2000. Year Demand 1990 1.1 1991 1.5 1992

    asked by Andrew on November 29, 2006
  91. physics

    A 20000 kg satellite is launched from the surface of saturn and put into orbit.The satellite is launched at the speed of 27.5 x 10^3 m/s. a)calculte the satellite's total energy. b)Its orbital radius c)If the satellite was shot straight up at the same

    asked by Roger on June 18, 2012
  92. Trigonometry (Math)

    A ladder 42 feet long is place so that it will reach a window 30 feet high (first building) on one side of a street; if it is turned over, its foot being held in position, it will reach a window 2o5 feet high (second building) on the other side of the

    asked by Alianne on February 7, 2012
  93. trigonometry

    a submarine at the surface of the ocean makes an emergency dive, its path making an angle of 21 degree with the surface. if it goes 300m long its download path, how deep will it be? what horizontal distance is it from its starting point?

    asked by riza on December 10, 2012
  94. MATH

    8 A ladder that is 13 feet long leans against a building. The bottom of the ladder is 5 feet away from the base of the building. How far up the side of the building does the ladder reach? 18 ft 16 ft 12 ft \ 8 ft*****

    asked by LALALMAMACASA on November 30, 2017
  95. Math

    For a history project, Marcus built a replica of the Texas State Capitol building. His model has a scale factor of 1/100. If the height of the Capitol's dome is 310 feet, how high is the dome on Marcus' replica?

    asked by Chace on December 16, 2012
  96. business

    i work at a small company that creates and markets video games. it is a 4 story office building.other business in the building are a dentist, young lawyer,and an insurance company.the building supplies space but little else in the way of service. i need to

    asked by lisa on April 25, 2009
  97. Physics/Math

    The Formula you use is the correct one. However, consider this. If the initial PE existed, wouldn't you have to add it to the initial KE then subtract the PE at some R from the center? We normally make ground zero PE level, but for this... Zero, a

    asked by bobpursley on March 11, 2007
  98. Math

    If a building 1 begins with four blocks and increases by three blocks each building, how many blocks will it take to make building 1,000

    asked by Gaby on September 20, 2007
  99. Math

    Sam wants to find the height of a window in a nearby building but it is a cloudy day. Sam puts a mirror on the ground between himself and the building. He tilts it so that when he is standing up he sees the reflection of the window. The base of the mirror

    asked by Ashley on March 10, 2016
  100. math algebra

    Gray Glaze requires 15 hours to put a new roof on a house. His apprentice, Anna Gandy, can record the house by herself in 20 hours. After working alone on a roof for 6 hours, Gary leaves for another job. Anna takes over and completes the job. How long does

    asked by jacky on November 19, 2016