# 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 59
1. ## physics

A large chandelier weighing 1500lbs. is suspended from the roof of a theater lobby. The steel pipe from which it hangs is 20ft long. Determine the size of the pipe necessary to carry chandelier safely. Use A36 steel. What is the resulting elongation of the

asked by stacey graham on April 17, 2010
2. ## Pre-Algebra

how do i do these two. irene bought a typewriter at rocklanes in 1988 for \$200.In 1999, she bought the same model of typewriter for \$120.What is the percent decrease in the price of the typewriter. denise bought a typewriter at rocklanes in 1984 for \$500.

asked by Kemmaris on May 14, 2007
3. ## CHEMISTRY

A large number of hydrogen atoms have electrons excited to the nh=4.How many possible spectral lines can appear in the emission spectrum as a result of the electron reaching the ground state(n1=1)?Draw a diagram to show all path ways for the de-excitation

asked by BOIKETLO on August 31, 2015
4. ## physics

In the javelin throw at a track and field event, the javelin is launched at a speed of 29 m/s at an angle of 35° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How

asked by Xavier on September 15, 2010
5. ## physics

A projectile is launched over level ground at a launch angle of 70o with an initial velocity vo. At some later time while the projectile is on its way to the peak in its trajectory, its velocity vector makes an angle of 50o with respect to the horizontal.

asked by billo on July 29, 2013
6. ## Physics

In the javelin throw at a track and field event, the javelin is launched at a speed of 25 m/s at an angle of 30.7° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How

asked by blah on September 28, 2010
7. ## physics

In the javelin throw at a track-and-field event, the javelin is launched at a speed of 35.0 m/s at an angle of 33.7 ° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes.

asked by Erin on January 26, 2012
8. ## AP Physics 1

In the javelin throw at a track-and-field event, the javelin is launched at a speed of 33 m/s at an angle of 32° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How

asked by Anonymous on October 14, 2015
9. ## physics

A ball is launched at a velocity of 20 m/s in a direction making an angle of 25° upward with the horizontal.  i) calculate  maximum height reached by the

asked by Rodgers on November 25, 2017
10. ## johnny

A projectile is launched over level ground at a launch angle of 70o with an initial velocity vo. At some later time while the projectile is on its way to the peak in its trajectory, its velocity vector makes an angle of 50o with respect to the horizontal.

asked by franko on July 29, 2013
11. ## calculus

The height of a projectile launched into the air is given by h (t)= -16t^2 + 48t + 60, where h is the height of the projectile in feet above the ground and t is the number of seconds after its launch. Find the *instantaneous rate of change* in the height

asked by Brandy on April 26, 2013
12. ## Engineering Kinematic

The particle travels along the path defined by the parabola y=0.5(x^2). If the component of velocity along the x-axis is v=5t [m/s], determine the particle's distance from the origin and the magnitude of its acceleration when t=1s. The initial condition is

asked by Claire on October 16, 2010
13. ## health information

I need to research the root cause of disease classification structure and how it is linked to the outcomes of both the reimbursement and the epidemiological data. how do I research these topics? Or can you explain these instructions better? I asked the

asked by Mary on May 6, 2013
14. ## physics/biomechanics

1. Once a person is in the air during a jump can they modify their path in the air of: a) their head b) Their whole body centre of gravity c) their hip joint (yes or no) 2. To achieve peak horizontal distance on flat ground, what should the angle of take

asked by tasneem on February 7, 2013
15. ## physics/biomechanics

1. Once a person is in the air during a jump can they modify their path in the air of: a) their head b) Their whole body centre of gravity c) their hip joint (yes or no) 2. To achieve peak horizontal distance on flat ground, what should the angle of take

asked by tasneem on February 7, 2013
16. ## English

What does temper mean in the following? "One equal temper of heroic hearts,/Made weak by time and fate, but strong in will" a- frame of mind b- plan for attack c- path to destiny d-degree of balance My answer is A

asked by Steve on April 6, 2018
17. ## physics

An object of mass 50kg moves at 50m/s round a circular path of radius 10m.calculate i)centripetal acceleration. ii)centripetal force need to keep it in it's orbits.. Please show all caculations detains.

asked by pete onoriode on March 18, 2011
18. ## physics

What is the radius of a communications satellite’s orbital path that is in a uniform circular orbit around Earth and has a period of exactly 24.0 hours (86,400 seconds). (Measurement is from the center of Earth.) G = 6.67 × 10-11 N.m2/kg2 ME = 5.98 ×

asked by Marco on May 30, 2012
19. ## physics

a stone attached to the end of elastic string is whirled around in a circular path of radius 20cm if the stone makes 15 complete revolution in 5 seconds, calculate its angular and linear velocities.

asked by isah a on March 29, 2017
20. ## math

A planes flight path called for it to fly from J to W. W is 200km due North and 500km West of J. What bearing will the pilot fly and what distance will be traveled in air kilometers. I know to draw and image but that is it.

asked by K on September 4, 2015
21. ## writing

well im troubled with a prompt, it is... explain how the path your life would take be diffrent if school ended at 9th grade... well im just looking for a few ideas that could basically involve anyone. the only few things i could come up with are - moar

asked by qwerty on October 2, 2008
22. ## Physics

A body of mass 0.1 kg is being rotated in a circular path of diameter 1 m on a frictionless horizontal plane by means of a string. It performs 10 revolutions in 31.4 sec, calculate the centripetal force acting on the body

asked by Anjali on August 11, 2011
23. ## statistics

a rocket club makes its own rockets. The rockets go to a mean height of 1100 feet with a standard deviation of 60 feet. if the club fires 36 rockets, what is probability that the mean heights of the rockets will be greater than 1080p feet

asked by eric on July 13, 2014
24. ## physics

Consider a spacecraft that is to be launched from the Earth to the Moon. Calculate the minimum velocity needed for the spacecraft to just make it to the Moon’s surface. Ignore air drag from the Earth’s atmosphere. Hint: The spacecraft will not have

asked by bee-z on October 24, 2012
25. ## physics

Consider a spacecraft that is to be launched from the Earth to the Moon. Calculate the minimum velocity needed for the spacecraft to just make it to the Moon’s surface. Ignore air drag from the Earth’s atmosphere. Hint: The spacecraft will not have

asked by Anonymous on October 24, 2012
26. ## physics

A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i.e, what is the motion's frequency?

asked by thuy on March 14, 2013
27. ## Pre Calculus

Why can we use either common or natural logarithms to re-express data that fit a power regression model? Couldn't really figure out what the relationship was.

asked by Laura on January 22, 2011
28. ## Molate

Write your personal misssion statement that clearly indicates your own position in engaging in services delivery protests that will be a good model to the youth

asked by Mapula on June 21, 2015
29. ## history

In what case did Justice Jackson (dissenting) outline the three-part model of presidential power that continues to be referred to today?

asked by Anonymous on September 15, 2015
30. ## statistic

Which of the following behave according to a power model? Select all the apply. 1.Finance 2. Population 3. area 4. Pricing 5. volume 6. bacteria 7. mass

asked by helen on December 13, 2013
31. ## math

use a vertical motion model to find how long it will take a walnut to reach the ground if it falls from the top of a 55-foot tree?

asked by elisabeth on May 5, 2010
32. ## algebra

a tree 5 ft tall growns an average of 8 in each year, write an ewquation to model the trees height h inches after y years

asked by karen on May 3, 2012
33. ## Science question

What would happen to the current model of the atom if new information about it’s structure is discovered in the future? Would it be revised, strengthened,proven or defended?

asked by Gabby on October 31, 2013
34. ## life orientation

write your personal mission state that clearly indicates your own position in engaging in service delivery protests that will model correctly to the youth

asked by leonard on July 14, 2015
35. ## Criminal Justice

Peacemaking criminology suggests the adoption of a peace model based on: A. retribution. B. goal setting. C. reconciliation. D. negotiation. is it B

asked by Amy on May 21, 2015
36. ## algebra

assume kylie and caitlyn were extremely accurate and the correlation coefficient is r= 0.99. Find the line of best fit to model the data

asked by Anonymous on May 25, 2016
37. ## help one question

5. Scientists used _______ data to generate a model of the moon’s interior. (1 point)crater moonquakes phase eclipse

asked by :D on November 6, 2012
38. ## Algebra

Find a mathematical model representing the statement. (Determine the constant of proportionality.) v varies jointly as p and q and inversely as the square of s. (v = 2.1 when p = 4.2, q = 5.4 and s = 2.4.) v =

asked by angie on November 25, 2014
39. ## physics

A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i.e, what is the motion's frequency?

asked by thuy on March 14, 2013
40. ## Social Studies

I need to write a paper on a transgender role model. It can be someone in the field of art, science, math, or business leadership. Any suggestions?

asked by Ryan on June 15, 2017
41. ## grammar

If Jake_____(take) acting classe, he might _____(have) the confidence to go to the audition. Now he has the leading role! Correct past model form please

asked by mike on July 16, 2009
42. ## Life Orientation

write your personal mission statement that clearly indicates your own position in engaging in service delivery protests that will be a good model to the youth.

asked by Hendrick on May 29, 2015
43. ## Life orientation

Write your personal mission statement that clearly indicates your own position in engaging in service delivery protest that will be a good model to the youth

asked by Nokwe on April 28, 2019
44. ## Operations Management

Calculate the minimum replenishment time to build 2500 Model A fountains given the following beginning inventories. Use the following information: (a) = weeks

asked by Zina Collins on December 13, 2013
45. ## Astronomy

Hi! 7. Which of the following was the earliest solar system model to exist? (1 point) a) Aristotelian b) heliocentric c) Copernican d) Ptolemaic My Answer: D Could someone please help me? Thanks! - Da Fash

asked by Da Fash on November 20, 2017
46. ## physics

Does anyone know what this is about? please help I would be more than grateful.. How does Rutherford’s model of the atom account for the back – scattering of alpha particles directed at the gold leaf

asked by Olivia on November 10, 2007
47. ## Physics

Two projectiles are launched from ground level at the same angle above the horizontal, and both return to ground level. Projectile A has a launch speed that is twice that of projectile B. (Sketch trajectories of projectiles). Assuming that air resistance

asked by Christy on May 24, 2010
48. ## Physics

A half pipe can be thought of as half of a cylinder with radius of 7.00m. If a skater with mass 75.0 kg, starts with an initial velocity of 5.00 m/s at the top of the ramp, (a), what is his velocity at the very bottom of the ramp? The skater then

asked by Sophia on March 23, 2017
49. ## Physics

What is the kinetic energy of an ideal projectile of mass 19.4 kg at the apex (highest point) of its trajectory, if it was launched with an initial speed of 29.2 m/s and at an initial angle of 46.9° with respect to the horizontal? I know kinetic energy

asked by Anonymous on October 21, 2014
50. ## Project Management

you are to prepare a network diagram using the Activity on the Arrow technique. You must use as many concurrent activities as you can and you must show the critical path. (A network diagram with no concurrent activities will result in no grade points being

asked by Courtney on June 19, 2009

1. The distance, d(t), fallen by a free-falling body is represented by d(t)+vt-0.5gt^2, where v is initial velocity and g is acceleration due to gravity. The acceleration due to gravity is 9.8 m/s^2. If a rock is thrown downward with an initial velocity of

asked by cierra on November 15, 2015
52. ## physics

An object is launched horizontally from a cliff. The cliff is 80m high and the object has an initial velocity of 50m/s. Find the initial x and y velocity and the final x and y velocity

asked by Mike on October 2, 2012
53. ## acounting

TEST XQ's Software Development Division (SDD) has developed several architectural design software packages. One software package that they have developed is being sold to English Company for \$250,000 or 325,000 pounds. The cost of developing the software

asked by sara on January 14, 2011
54. ## Physics

An arrow directed at a stationary target is shot at an angle of [E 25 N]. The arrow hits the intended target at the same height from which it was launched, 3.0 s later. a) Determine the distance from the archer to the target. b) At what angle should the

asked by Taylor on January 13, 2011
55. ## Physics

A. A 45kg gymnast launched herself from a vault with a speed of 1.8m/s.she lands upright on the ground 125 cm below at what speed will she hit the ground? B. On landing she bends her knees through a height of 0.15m. Detained the average force exerted by

asked by tristan on March 30, 2017
56. ## English - ms. sue

for glass castle memoir i finally get assignment ms. sue i write persuasive essay, b/w deduction and induction i think deduction be easy cause i only hve to support my main points. i need to do it on dad. i not know what topic to do it on, and how to

57. ## Physics

A projectile is launched at an angle of 34.0o above the horizontal. The projectile has a mass of 1.50 kg and is given an initial speed of 20.0 m/s. a) What is the initial kinetic energy of the projectile? b) By how much does the gravitational potential

asked by John on May 30, 2014

For the problems below, I have the answers written but from questions d-i, I don't understand how they got the answer. I tried doing it and somehow I messed up with the formula with 3/2 and 5/2 so please show work on how they got the answers for d-i. In

asked by JJ on February 28, 2012
59. ## physics

For a football player bending the ball around a defensive wall, state three principles which govern the flight path of the ball and the amount of spin imparted on to the ball? (3 marks) please help?

asked by jamie on June 24, 2014
60. ## Algebra

A tennis player's swing moves along the path of an arc. If the radius of the arc's circle is 4 feet and the power and the angle of rotation is 100 degrees, what is the length of the arc?

asked by Ann on April 11, 2015
61. ## algebra

A baseball player hits a baseball into the outfield. The following equation models the ball's path. If not caught, when will the baseball land? Round to the nearest tenth second. h = -16t^2 + 50t + 4

asked by tracy on October 20, 2011
62. ## Physics

A 0.31 kg pendulum bob passes through the lowest part of its path at a speed of 2.02 m/s. The acceleration of gravity is 9.8 m/s2 . What is the tension in the pendulum cable at this point if the pendulum is 72 cm long? Answer in units of N

asked by Hunter on March 21, 2012

Once again i didn't get a book so im having trouble. I tried my best on the ones i answered..if i got any wrong please tell me and correct them for me please! Thanks so much :) 1. According to Jean Piaget, in what is all learning based? A. Sensorimotor

asked by KAYLA on January 19, 2009
64. ## chem

over the years, the thermite reaction has been used for welding railorad rails, in incendiary bombs, and to ignite solid fuel rocket motors. The reaction: Fe2O3(s) + 2 Al (s) -> 2 Fe(l) + Al2O3 (s) What masses of iron ( III) oxide and aluminum must be used

asked by greeny on August 26, 2012
65. ## science

I'm doing Science right now. I have the answers down for most of them but I'm not sure if I am right..... Can u pls help me and tell me if my answers r right? I suck at science :S 1.A 2.C 3.B 4.D 5.D 6.A 7.? 8.A 9.E 10.C 11.A 12.D 13.C 14.B 15.? 16.? 17.?

asked by barnyard-gal on April 23, 2018
66. ## Algebra

Jordan uses a linear equation to model the data in a table. Which reasoning might Jordan have used in the decision to model the data with a linear equation? The products of corresponding x- and y-values are equal. The ratios of consecutive y-values are

asked by Melanie on July 7, 2014
67. ## Geography

3. Which of the following is an example of a non-material aspect of culture? A. Church Building B. An altar C. Religious decoration D. Burning of incense E. Burial site

asked by Anonymous on January 9, 2016
68. ## physics

Ok so im looking for minimum avg power for a 38 kg boy to climb a 170 m building that takes 10.2 min include only work done against gravity

asked by Tim on October 14, 2013
69. ## Art

I know this is probably a dumb question but, I have a project due and in the instructions it says "Use a variety of media to show building materials such as brick and stone". What exactly does that mean?

asked by Daren on April 16, 2018
70. ## martha valle high school

Find to the nearest meter the height of a building if its shadow is 42 meters long when the angle of elevation of the sun measures 42°

asked by Jasmine on April 17, 2012
71. ## Social studies

Which ruler was most responsible for uniting Greece and building an empire? A. Alexander the Great B. Pericles C. King Philip D. Xerxes

asked by Paul on December 11, 2018
72. ## calculus

A rectangular lot is to have an area of 1600m^2. Find the shortest that can can reach the building with one end resting on the ground outside the wall

asked by montefalco on June 15, 2016
73. ## Credit Cards - Situation

A young entrepreneur wants to borrow money to rent a building & purchase equipment that she will use to start a new business in her community. Im guessing that she should, although Im not sure why...

asked by Yipee on March 31, 2011
74. ## physics

A 3kg basketball is dropped from the top of a 120m building. if all of the energy is converted into KE, what is the velocity of the ball just before it hits the ground

asked by ShaSha on January 6, 2014
75. ## geography

What does this mean? Nation-building can involve the use of propaganda or major infrastructure development to foster social harmony and economic growth.

asked by Bethany on November 29, 2010
76. ## art appreciation

What were the chief problems of construction involved in raising the dome of the Florence Cathedral in an age that did not have today's building technologies?

asked by Alice on April 11, 2011
77. ## physics

a baseball is released at rest from the top of a building.it hits the ground after falling for 6seconds . what was the height from which the ball was dropped

asked by winnex on February 20, 2016

In what ways did the technology of metal making and road building alter humanity's relationship with their environment during ancient times and before?

asked by James on July 31, 2011
79. ## science

when building a house, wich of the following is a simple machine that a construction worker would use? A)plywood B)safety hat C)cement D)pulley

asked by little kakashi hatake on February 2, 2017
80. ## interior decorator

asked by sugar on December 24, 2013
81. ## science

which of the following is the best way to minimize weathering and erosion? A. building suburbs B. grazing livestock C. setting fires D. replanting vegetation My answer is D am i right?

asked by Lidia on September 15, 2011
82. ## Math

You have 2 hundred feet of fencing to use for building a rectangular dog pen. find the dimensions of the pan having the greatest possible area

asked by Courtney on June 4, 2014
83. ## PHYS

You throw a bowling ball o the empire state building(381m high) 10m/s down- ward. How long does it take to get to the bottom?

asked by Q on June 17, 2013
84. ## p.e

The essential nutrient that serves as the main building blocks for the body is? A. Protein B. Fat C. Carbohydrates D. Minerals A am I correct?

asked by Anonymous on October 6, 2014
85. ## math

A box with a square base and no top is to hold 32in^3. Find the dimensions that require the least building material nevermind i got it

asked by jean on June 7, 2007
86. ## physics

Find the pottential energy of a boy of mass 10kg standing on a building floor 10 meters above the ground level p.e?

asked by Salisu on February 3, 2014
87. ## SS

Which of the following was an immediate cause of the Mexican Revolution of 1910? A. Spanish domination*** B. the overthrow of Maximilian C. widespread poverty D. the building of the Panama Canal

asked by hi on March 5, 2019
88. ## Math

exploring variables in probability building spinners... a spinner with 5 pies. red=1/6 blue=1/3 green=1/6th yellow =1/6

asked by Linda for Justin on February 24, 2008
89. ## Social Studies

Which of the following was the main focus of Georgians during the trustee period? A. buliding churches B. survival C. making roads D. building schools I'm not sure but I'm going to go with B or A?

asked by Amber on October 5, 2014
90. ## social studies

Help!im stuck on this question: What was not one of the accomplishments of progressives? *income tax *larger companies *blue laws *building codes

asked by Shannon on December 14, 2017
91. ## Calculus

The number of building permits in Pasco t years after 1992 roughly followed the equation n(t)=400e^.143t.what is the doubling time?

asked by Agata on February 19, 2016
92. ## Physics

A house painter is standing on a uniform, horizontal platform that is held in equilibrium by two cables attached to supports on the roof. The painter has a mass of 75 kg and the mass of the platform is 20.0 kg. The distance from the left end of the

asked by Jennifer on October 28, 2010
93. ## physics.

Part 1: A ball is thrown horizontally from the top of a building 28.6 m high. The ball strikes the ground at a point 80.3 m from the base of the building. The acceleration of gravity is 9.8 m/s^2. Find the time the ball is in motion. Answer in units of s.

asked by Autumn on October 25, 2010
94. ## physics

A fish hangs from a spring scale supported from the roof of an elevator. a) if the elevator has an upward acceleration of 1.2 m/s^2 and the scale reads 200 N, what is the true force of gravity on the fish? b) under what circumstances will the scale read

asked by Tina on December 28, 2018
95. ## Math

Stanely is 6ft tall. He wants to stand in the shade of a tree that is 35ft tall. If the tree casts a 10ft shadow, what is the farthest Stanely can stand from the tree and be completely in its shadow? Round your answer to nearest tenth of a roof?

asked by Betsy on February 20, 2013
96. ## English

I need intro paragraph proofread and edited please source used for intro paragraph : empire demands discipline, the coordination of all forces and a deeply felt sense of duty and sacrifice: this fact explains many aspects of the practical working of the

asked by jake on December 17, 2009
97. ## Physics

A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 850-kg helicopter rises from rest to a speed of 6.9 m/s in a time of 3.8 s. During this time it climbs to a

asked by Nikki on November 2, 2009
98. ## physics

A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 740-kg helicopter rises from rest to a speed of 7.6 m/s in a time of 3.1 s. During this time it climbs to a

asked by Anonymous on October 10, 2014
99. ## physics

The Weistin Stamford Hotel in Detroit is 228 m tall. Suppose a piece of ice which initially has a temperature of o degrees celcius falls from the hotel roof and crashes to the ground. Assuming that 50% of the ices mechanical energy during the fall and

asked by bob on May 17, 2009
100. ## Math

Water spraying from a large fountain follows a path modelled by the function h(d) = sa001-1.jpgd2 + 4d, for h ³ 0, where h is the height of the water above the fountain jet and d is the horizontal distance of the water from the fountain jet, both in Water

asked by Alex on November 3, 2014