# A model rocket is launched from a roof of a building. Its path is described by the relationship h=-5t*2+35t+10, where h is the height in metres and t is the time in seconds. How tall is the building? What is

13,356 questions, page 36
1. ## physics

A rocket of 30000kg mass acquires a speed of 2000k after takeoff. The power expended during this time is in 1minute?

asked by poppy on April 19, 2019
2. ## Physics

A rocket blasts off. In 10.0 seconds it is at 10,000 ft, traveling at 3600 mph. Assuming the direction is up, calculate the acceleration.

asked by Isis on June 13, 2013
3. ## physics

How much thrust is required to launch a 5 kg bottle rocket with an upward acceleration of 6.4 m/s2? I've gotten 32 because F=MA but I don't understand how to account for gravity. Please help!

asked by mack on December 30, 2014
4. ## biology

Suppose we want to maintain a large number of homozygous lethal chromosomes, exposed to chemical mutagens, for a mutation screening experiment in a small orb web building spider species. One of these lines has a dominant mutant named Disordered (D) that

asked by Akhil on October 17, 2011
5. ## math

Thom has a scale model of his car. The scale is 1 inch = 12 inches. If the actual car has 16- inch wheels what size are the wheels on the scale model. I don't know where to begin

asked by Dorothy on June 4, 2015
6. ## Geometry

A tree stands 22 feet tall and is 382 feet from a building. The tree casts a shadow that is 40 feet long. How tall is the building? I got 211 feet, but I do not think that is correct. Can you tell me what I am doing wrong? I set it up like this h/382=22/40

asked by Michael on December 11, 2016
7. ## Trig

A 60-foot flagpole stands on top of a building. From a point on the ground the angle of elevation to the top of the pole is 45 degrees and the angle of elevation to the bottom of the pole is 42 degrees. How high is the building?

asked by Stephanie on January 19, 2013
8. ## physics 70

A .275 kg. object is swung in a vertical circular path on a string .850 m. long. A) What are the forces acting on the ball at any point along this path? B) Draw free-body diagrams for the ball when it is at the bottom of the circle and when it is at the

asked by Annette on April 21, 2013
9. ## Urgent! PLZZ HHEELLPP!!

8. Which answer best describes a main benefit of the Transcontinental Railroad? A.) It proved to the world that the United States was capable of great feats of engineering B.) It created safe, high-paying jobs for immigrants who wanted to work building the

asked by TESSA on February 26, 2016
10. ## Math11

A model airplane is made on a scale of 1:128. A)What is the scale factor of the model? B)If the airplane has a wingspan of 30 cm, what is the wingspan of the actual airplane Need help on this.

asked by Sari on March 30, 2012
11. ## Scale Representations

A model airplane is made on a scale of 1:128. A)What is the scale factor of the model? B)If the airplane has a wingspan of 30 cm, what is the wingspan of the actual airplane?

asked by Sari on March 29, 2012
12. ## physics

A landscape architect is planning an artificial waterfall in a city park. Water flowing at 1.40 m/s will leave the end of a horizontal channel at the top of a vertical wall 3.90 m high, and from there the water falls into a pool. To sell her plan to the

asked by kia on February 20, 2011
13. ## Algorithm/Function

So I need a function (parameters: origin x, origin y, destination x, destination y, object x1, object y1, object x2, object y2). The object in this case would be a wall with two points (x1, y1, x2, y2). The function needs to return a true/false if the wall

asked by Ariel on November 10, 2007
14. ## Math

Is this the correct way to measure the angle of refraction/incidence? Place the object whose refractive index you wish to measure on a clean sheet of paper and draw round it. Mark out, using dress making pins, a ray of light as it passes through the object

asked by SmartNoodle on May 13, 2019
15. ## Math

Word problem A woodcarver wants to make a scale model of a chair. The height of the model will be 3 inches which is 0.08 times the height of the fl sized chair What is the size if the full sized chair in inches?? I got : 5.4 inches. Is this right??

asked by Marko on September 22, 2012
16. ## English

Hello. I'm very grateful for your previous answer. I have a question. Which word is correct in the context (maybe, both?): "Rome, which/who(?)had long suppored the Hitler regime, launched..." Thank you very much.

asked by Ilma on May 6, 2012
17. ## S.S

Whose mill launched the factory system? A. James Monroe B. Eli Whitney C. Samuell Slater D. Francis Cabot Lowell I think it's D.. am I right?

asked by ash on January 23, 2015
18. ## History

7.)Which answer correctly explains why most factories were located along the eastern coast? A.)The first factories took over ship building areas B.)Shipping companies were the first to switch to factory building C.)Early factories needed sea water for

asked by #FreeGucci on March 29, 2016
19. ## math

At 3:00 PM a man 146 cm tall casts a shadow 136 cm long. At the same time, a tall building nearby casts a shadow 177 m long. How tall is the building?

asked by laurens on April 27, 2014
20. ## English

Which of the following is a simple sentence? A. The store opened early and closed late to celebrate its annual sale. B. She left home on time, but she still arrived late due to traffic. C. After he compared the prices and features, he purchased the less

asked by Jay on January 23, 2015
21. ## economics

My final question, I hope you can understand it. If all the values of the endogenous variables are staitc in an economics model,does it imply that testable implications must be able to be generated? If not, can you raise some economic model (in which all

asked by John on February 3, 2009
22. ## Psychology- Assessments

In comparison to the ______________ model, the _____________ model assesses the complexities of learning disabilities better than a one-step process where an individuals is tested once and diagnosed. a. discrepancy; Response to Intervention b. Response to

asked by Crystal on August 23, 2013
23. ## algebra

a landscaper uses square tiles to make garden paths the ends of the paths are always 2 tiles wide, and the center portions of the paths are 3 tiles wide. what equation gives the total number y of tiles needed to make a path with a length of x tiles. the

asked by bri on February 26, 2012
24. ## physics

From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. The bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.42 m, and x = 7.2 m.)Determine

asked by Anonymous on October 21, 2010
25. ## Physics

From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. The bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.42 m, and x = 7.2 m.)Determine

asked by Anonymous on October 20, 2010
26. ## Math

A building casts a shadow of 8.5 meters when a man, 1.68 meters tall, casts a shadow of 1.1 meters.Find the height of the building.

asked by mary jean lumagot on August 26, 2015
27. ## English

Check? These right? 1. In the bitter cold, (he, him) and Dad struggled to save the orange crop. In the bitter cold, he and dad struggled to save the orange crop. 2. (Her and me, She and I) have joined the Shutter and Lens. She and I have joined the Shutter

asked by Victoria on December 11, 2012

the annual sales S (in billion of dollars) of oracle corporation from 2004 through 2009 can be approximated by the linear equation S= 2.903t-1.98, 4 is less than proximally T less than proximally 9, where t represents the year, with t=. use the model to 4

asked by bibi on May 25, 2014
29. ## Math

An architect is drawing a scale model of a new mall. The real mall will be 1800 feet long. The scale the architect is using is 1 inch is equal to 100 feet. How long will the model be?

asked by Brittany on March 11, 2013
30. ## criminal Justice

•How do advocates of the crime control model view plea-bargaining? •How do advocates of the due process control model view plea-bargaining I can not find this information online. Please help

asked by Patiance on December 9, 2014
31. ## English

"It is a moribund reader who doesn't feel the spell of its bounding anapests, as hard to ignore as a herd of reindeer on roof." I need help... Please restate it,so I can understand it better... Please help............

asked by Anonymous on July 23, 2013
32. ## Physics

A particle travels counterclockwise around the origin at constant speed in a circular path that has a diameter of 2.50 m, going around twice per second. Point Q is on the path halfway between points P and R, which lie on the x axis and the y axis,

asked by Rachel on May 25, 2012
33. ## Chemistry Help!!!!

for each of the following pairs of elements, give the correct molecular formula, explain how you arrived at this answer( you may use the Bohr model notation, or the orbital model notation, or explain linguistically) and note whether the bonding is covalent

asked by John on March 26, 2012

Assignment for week 5 Given the following information, draw the project network. Compute the early, late and slack times for the project network. which activities are on the critical path have only the start or finish of the activity on the critical path?

asked by Gloria on December 6, 2010
35. ## Physics

Standing on the top ledge of a 55 m high building you throw a ball straight up with an initial speed of 29 m/s. How long to the nearest second, does it take to hit the ground? Answer after rounding is 7 seconds. The next question is "If the building in the

asked by Anonymous on August 26, 2012
36. ## Scince: Physics

A ball is dropped from a building and falls with an acceleration of magnitude 10m/s^2. The distance between floors in the building is constant. The ball takes 0.5s to fall from the 14th to the 13th floor and 0.3s to fall from the 13th floor to the 12th.

asked by Lynn on December 10, 2008
37. ## Physics

1. A car starts from rest and accelerates uniformly at 3.0 m/s2. A second car starts from rest 6.0 s later at the same point and accelerates uniformly at 5.0 m/s2. How long does it take the second car to overtake the first car? 2. A ball is thrown downward

asked by G on February 16, 2012
38. ## Geometry

In the diagram, a building casts a 35-ft shadow and a flagpole casts an 8-ft shadow. If the flagpole is 18 ft tall, how tall is the building? Round to the nearest tenth.

asked by Okay on April 27, 2014
39. ## maths, algebra

Sakshi's height= 4 feet When she stood on the ground shadow is = 15 feet At the same time shadow near building ground is= 75feet What is the height of the building?

40. ## finance

Shamroll inc. is a household products frim that is considering developing a new detergent. In evaluationg whether to go ahead with the new detergent project, which of the following statements is most correct? A) The company will produce the detergent in a

asked by savin1 on April 16, 2011
41. ## physics

The diameters of Earth and the Sun are approximately 1.3 107 m and 1.4 109 m respectively, and the average Sun-Earth distance is 1.5 1011 m. Consider a scale model of the solar system, where Earth is represented by a peppercorn 2.3 mm in diameter.

asked by kj on January 28, 2009
42. ## math

Richard is standing between two buildings in a town house development.The building on the left is 9 m away and the angle of elevation to its security spotlight A is 68 degrees. The building on the right is 6m away and the angle of elevation to its security

asked by donovan on July 27, 2012
43. ## math

the melt in your mouth chocolate factory is a rectangular building. the distance across the front of the store is 28 yards. the distance from the front to the back of the building is 12 yards. if the owners want to put up a fence around the outside of the

asked by kevin on February 2, 2014
44. ## Physic

A ball B1 is dropped from the top of a building, one second later another ball, B2 is thrown down with an initial speed of 20.0m/s. The two balls hit the ground at the same time. 1)What is the time it took B1 to teach the ground? 2) What is the height of

asked by Heeelllp on March 24, 2017
45. ## math

Richard is standing between two buildings in a town house development.The building on the left is 9 m away and the angle of elevation to its security spotlight A is 68 degrees. The building on the right is 6m away and the angle of elevation to its security

asked by donovan on July 26, 2012
46. ## quantitative methods for business

A manager of an inventory system believes that inventory models are important decision-making aids. Even though often using an EOQ policy, the manager never considered a backorder model because of the assumption that back orderes were “bad” and should

asked by trai on July 19, 2013
47. ## geometry

4. In order to properly design a heating system for a greenhouse, the volume of air in the building needs to be determined. Find the volume of air in the greenhouse below. The length of the building is 40 feet long, the width is 20 feet long, and it is 8

asked by Scott on March 1, 2013
48. ## physics

The heating element of a water heater in an apartment building has a maximum power output of 29 kW. Four residents of the building take showers at the same time, and each receives heated water at a volume flow rate of 12x10-5 m3/s. If the water going into

asked by krissy on November 17, 2015
49. ## math

a man standing on ground level is 1000 feet away from the base of a 350 feet tall building. Find,to the nearest degree,the measure of the angle of elevation to the top of the building from the point on the ground where the man is standing? How do you solve

asked by b8 on May 27, 2014
50. ## geometry

In order to properly design a heating system for a greenhouse, the volume of air in the building needs to be determined. Find the volume of air in the greenhouse below. The length of the building is 40 feet long, the width is 20 feet long, and it is 8 feet

asked by Asics on September 24, 2014
51. ## geometry

a playground is 50yd by 50 yd amy walked across the playground from one corner to the opposite corner. how far did she walk? i got : 5000yd #2 a 70 ft ladder is mounted 10 ft above the ground on a fire truck. the bottom of the ladder is 40 ft from the wall

asked by marko on May 2, 2012
52. ## MATH

Please help me with these problems. Work and answer is appreciated! :) thanks. 1. Find on the interval theta is greater than or equal to 0 and less than 2pi; then find the general solution: 5tantheta+1=-2.89 16cos^2theta-6=3 6sin^2theta+sintheta=2

asked by gf on November 7, 2007
53. ## Differential Equations

Suppose a small cannonball weighing 16 pounds is shot vertically upward, with an initial velocity v0 = 300 ft/s. The answer to the question "How high does the cannonball go?" depends on whether we take air resistance into account. If air resistance is

asked by Jefferson on January 28, 2018
54. ## Physics

From the edge of the rooftop of a building, a boy throws a stone at an angle 24.0° above the horizontal. The stone hits the ground 4.40 s later, 104 m away from the base of the building. (Ignore air resistance.) Find the initial velocity of the stone.

asked by Max on February 8, 2010
55. ## Math

An architect is building a building. Each floor is l0 ft. He wants to build 18 steps with a total run of 14 ft. What is the ratio? What is the slope of each step? The height/run ratio of the staircase is 10/14 = 5/7 Each step is 14/18 feet long (9.33

asked by Paula on October 19, 2006
56. ## math

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.65 times 10^-5 watts/cm^2

asked by Andrew on March 17, 2013
57. ## physics

A small rocket is fired directly upwards with an initial velocity of 100m/s, How many seconds will it take to reach its maximum height?

asked by Natasha on February 29, 2012
58. ## math

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.33 10−5watts/cm2

asked by tekeria on June 5, 2013
59. ## Physics

A rocket blasts off with acceleration of 5 m/s squared. After 1 min it runs out of fuel. What is the max height and total time in the air?

asked by Jack on October 28, 2008
60. ## Science

Does Chewbacca have a human like wiener or is it one of those red rocket type deals? George Lucas won't answer my emails.

61. ## math

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.65 times 10^-5 watts/cm^2

asked by Andrew on March 16, 2013
62. ## physics

A 750 kg rocket accelerates straight upward from the ground at 60 m/s2. What is the force (thrust) provided by the engine? with a gravitational pull of 10 m/s2 down

asked by Troy on February 3, 2014
63. ## Physics

A Saturn V rocket with an Apollo spacecraft attached has a combined mass of 2.1 105 kg and will reach a speed of 11.2 km/s. How much kinetic energy will it then have?

asked by Ashley on May 12, 2011

A Pyrotechician is working on a new fourth of July rocket. He is using a highly reactive metal when burned. What can he use to lower the reaction rate????

asked by Anomynous on January 14, 2010
65. ## science

A small rocket is fired directly upwards with an initial velocity of 100m/s. How many seconds will it take to reach its maximum height?

66. ## Physics

A rocket traveling at 165 m/s is accelerated at a rate of -32.0 m/s. a) How long will it take before the instantaneous speed is 0 m/s? It takes 5.156 s. b) How far will it travel during this time?

asked by Jayd on September 4, 2007
67. ## Algebra

find the number of decibels for for the power of the sound given. Round to the nearest decibel. a rocket engine, 2.4 X 10 -5 watts/cm2

68. ## Physics

A 400 kg rocket sled can be accelerated at a constant rate from rest to 1600 km/h in 2.0 s. What is the magnitude of the required net force?

asked by Joseph on October 8, 2010
69. ## math

Find the number of decibels for the power of the sound given. Round to the nearest decibel.A rocket engine, 2.42 * 10^−5 watts/cm2

asked by Anonymous on November 11, 2013
70. ## Socials

How did the building of the transcontinental railway benefit the country? I know that First Nations were kicked off their farmland to make way for the building of the railway and for settlers(why would settlers need the land?). Why was the railway so

asked by Lina on May 5, 2015
71. ## science

Trace the impulse, listing the steps in as much detail as possible, from which your brain sends the message to the appropriate muscles to lift a glass of water to drink. As in the previous Application Assignment (parts one and two), detail the steps

asked by Tie on March 24, 2010
72. ## Language arts

The boys on the soccer team will go across the street, through the valley, and into the park. What is the adjective phrase? Beyond that hill sits a house without a roof. adverb phrase is millions of stars form a galaxy,and between any two stars there are

asked by completeidiot on September 10, 2012
73. ## STUDY UNIT: INTERPRETING WHAT YOU READ

Except for a few pigeons, Central Park was deserted. Mist hung above the chilled grass. Patches of old snow, scattered here and there, looked like white puddles. The sun hung just above the horizon, casting red and orange streaks across low-hanging clouds.

asked by leyla on October 6, 2010
74. ## physics

A superhero is running toward a skyscraper to stop a villain from getting away. As he is moving, he looks up at the top of the building and his line of sight makes a 33.0° angle with the ground. After having moved 300 m, he looks at the top of the

asked by jaime on August 9, 2014
75. ## Statistics

A construction company builds apartment buildings. The construction time follows a normal distribution with a mean time of 200 days and a standard diviation of 20 days. (a) What is the probability of completing a building in 224 days or less? (b) What is

asked by Donna on February 11, 2012
76. ## statistics

An exam is standardized to a Normal​ model, with a mean of 105 and a standard deviation of 18. Based on the Normal model ​N(105​, 18​) What exam score represents the 96th percentile? What percentile of an exam score of 100 represent?

asked by Anonymous on November 1, 2015
77. ## math

The sale of lawn mowers t years after a particular model is introduced is given by the function y=5500 ln(9t+4), where y is the number of mowers sold. Hoe many mowers will be sold 2 years after a model is introduced? Round the answer to the nearest whole

asked by sefako on April 20, 2010
78. ## physics

From the edge of the rooftop of a building, a boy throws a stone at an angle 30.0° above the horizontal. The stone hits the ground 4.10 s later, 112 m away from the base of the building. (Ignore air resistance.) (a) Find the initial velocity of the stone.

asked by jenn on February 14, 2010
79. ## Math

1. At midnight, you are 60 feet due north of Jonas. You run due east at ten feet per second. Jonas walks two feet per second due north. How many seconds after midnight is Jonas closest to you? What is the corresponding minimum distance separating you and

asked by Jane on March 28, 2015
80. ## Statistics

A person has money worries and decides to invest in the computer industry. They want to know how the value will change over time. They used an exponetial regression model where the predictor is time in months and the response var is money measure in

asked by Anonymous on March 22, 2017
81. ## Math/ Computers

Posted by Ariel on Saturday, November 10, 2007 at 4:33pm. So I need a function (parameters: origin x, origin y, destination x, destination y, object x1, object y1, object x2, object y2). The object in this case would be a wall with two points (x1, y1, x2,

asked by Ariel on November 12, 2007
82. ## physics

A missile is launched at an angle of 25 degrees to the ground. It hits a target at 301.5 meters from the point of launch. find the initial velocity

asked by help on February 22, 2014
83. ## Math

A surveyor standing 56 meters form the base of a building measures the angle to the top of the building and finds it to be 36 degrees. Thesurveyor then measures the angle to the top of the radio tower on the guilding and find that it is 47 degrees. How

asked by Sarah on May 3, 2009
84. ## math

a city block 500ft by 500ft is an unobstructed paved lot, except for a small office building 100ft by 100ft, centered in the middle of the block. What's the shortest distance from the SW corner to the NE corner, going through the paved lot and along (but

asked by sarah on March 7, 2010
85. ## Magnets

A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region

86. ## chem

can someone give me examples of the explanatory power of the quantum-mechanical model? Power to explain what? The nature of the chemical bond? Linus Pauling wrote a book with that title. Bascially, QM can explain everything about chemistry such as

asked by ashley on March 7, 2007
87. ## math

A carpenter needs to calculate the correct length of the wall studs for a platform-frame construction. The building will have a finished floor-to-ceiling height of 7′8½″, a 1″-thick finish floor, ¾″ furring strips in the ceiling, and ½″ gypsum

asked by doug on December 3, 2018
88. ## Physics

The waves from a radio station can reach a home receiver by two paths. One is a straight-line path from transmitter to home, a distance of 21.0 km. The second path is by reflection from the ionosphere (a layer of ionized air molecules high in the

asked by Stacey on November 26, 2010
89. ## physics

There is a sign hanging off of a building. The sign itself is hung at the far end of a rod. The rod is held up by both a pivot on the building's wall, and a vertical cable attached 1 m away from the building to the rod. The cable and the rod make a right

asked by Anastasia Beaverhausen on August 15, 2007
90. ## math HELP plz

Richard is standing between two buildings in a townhouse development. The building on the left is 9m away and the angle of elevation to its security spotlight, A, is 68 degree. The building on the right is 6m away and the angle of elevation to its security

asked by Danielle D on September 13, 2012
91. ## Math

Richard is standing between two buildings in a townhouse development. The building on the left is 9m away and the angle of elevation to its security spotlight, A, is 68degree. The building on the right is 6m away and the angle of elevation to its security

asked by Danielle on August 31, 2012
92. ## Biology

39. A) Identify a producer, herbivore, omnivore, and carnivore [in the ocean], explaining their roles in the path of energy flow. My answer: One producer in the ocean is algae; they provide energy. Krill are herbivores, which means that they feed off of

asked by mysterychicken on February 19, 2010
93. ## Math

a statue is 8 feet tall. the display case for a model of the statue is 18 inches tall. which scale allows for the tallest model of the statue that will fit in the display case?

asked by no on September 3, 2013
94. ## geometry

A circular walking track has a radius of 150 yards. Margaret walked 2/3 of the distance before taking a break.? Would the path she walked be considered a “chord” or an “arc” of the circle? Explain. – How many yards has Margaret walked? Show or

asked by cassie on May 22, 2017
95. ## English

I do not quite understand this sentence. Please explain. "It is a moribund reader who doesn't feel the spell of its bounding anapests, as hard to ignore as a herd of reindeer on roof."

asked by Anonymous on July 23, 2013
96. ## Science

Please help with this one! You don't have to give the answer, just tell me where I'm supposed to start. Thank you! Calculate the potential energy of a ball with a mass of 5 kg that is sitting on a roof 20 meters high. Hint: Use g = 10 m/s.

asked by Anxious on January 17, 2019
97. ## Physics

Occasionally someone builds a house "off the grid." They put a bunch of solar panels on the roof and never connect to an electric company. These folks all use DC in their homes. Why do you suppose that is?

asked by Morgan on April 19, 2018
98. ## physics

While a roofer is working on a roof that slants at 45.0 degrees above the horizontal, he accidentally nudges his 94.0 N toolbox, causing it to start sliding downward, starting from rest.

asked by Anonymous on March 27, 2013