1. physics

    It is possible to shoot an arrow at a speed as high as 100 m/s. (a) If friction is neglected, how high would an arrow launched at this speed rise if shot straight up? (b) How long would the arrow be in the air? Please help! I do not have any clue as to how

    asked by sarah on June 7, 2010
  2. Physics

    A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distances of 40cm at a steady rate.if the effort is equal to 60N,determine.(a)The distance moved by the effort.(b)The workdone by the effort in lifting the

    asked by Rose on January 1, 2015
  3. physics

    an olympic long jumper i capable of jumping 8.0 m. Assuming hi horizonal speed is 9.1 m/s as he leaves the ground, how long is he in the air and how high doe he go? Assume that he lands standing upright that is, the same way he left the ground.

    asked by taylor on January 5, 2012
  4. Physics

    A block and tackle with a velocity ratio of 7 is used to raise a mass of 50kg through a vertical distance of 800mm at a steady rate. If the effort is equal to 110N. Determine (a) The distance moved by the effort. (b) The workdone by the effort in lifting

    asked by Aaron on June 24, 2020
  5. physics

    A light–rail commuter train draws 645 A of 590–V DC electricity when accelerating. What is its power consumption rate in kilowatts? How long does it take to reach 30.0 m/s starting from rest if its loaded mass is 4.50×104 kg, assuming 91.0% efficiency

    asked by Joe on September 13, 2014
  6. Physics

    A Canadian goose flew 845 km from Southern California to Oregon with an average speed of 28.0 m/s. How long, in hours, did it take the goose to make his journey?

    asked by Jenny on September 10, 2009
  7. government

    the governor of california has all of the following powers except a. the pocket veto b. the power to pardon convicted criminals c. the chief command of the california national guard a

    asked by jere on January 18, 2008
  8. college physics

    a) A light-rail commuter train accelerates at a rate of 1.25 m/s2. How long does it take it to reach its top speed of 80.0 km/h starting from rest? (b) The same train ordinarily decelerates at a rate of 1.75 m/s2. How long does it take to come to a stop

    asked by Melissa on January 25, 2014
  9. Economics

    What is the maximum amount it would be worth to shareholders to elicit high CEO effort all the time rather low CEO effort all the time?

    asked by Bertha on December 17, 2011
  10. Physics

    A light–rail commuter train draws 635 A of 640–V DC electricity when accelerating. What is its power consumption rate in kilowatts? (in kW) 406 kW You are correct. How long does it take to reach 30.0 m/s starting from rest if its loaded mass is

    asked by Ashton on September 14, 2014
  11. Physics

    Standing on the top ledge of a 55 m high building you throw a ball straight up with an initial speed of 45 m/s. How long to the nearest second, does it take to hit the ground? I got 10 seconds for the first question. How do I go about answering this one?

    asked by Anonymous on August 25, 2012
  12. Physic

    The spout heights in the container in the figure are 15 cm, 30 cm, 45 cm, and 60 cm. The water level is maintained at a 68 cm height by an outside supply. What is the speed of the water out of the 15 cm high hole? What is the speed of the water out of the

    asked by Bret on May 7, 2011
  13. science help !!

    1. Why is California’s high-speed rail such a groundbreaking effort? 2. Why will it take so long to complete the high-speed rail route?

    asked by kelsey on May 21, 2014
  14. Science

    Plzz Help me i need help Why is California's high speed rail such a groundbreaking effort??

    asked by Young Trippy Lil G on March 9, 2017
  15. Physics

    An aluminum (with Young's modulus 7 x 10^10 Pa) rail is 88.0 m long and has cross-sectional area 0.00050 m^2. The rail is fixed at one end and a 4000 N force is applied at the other end. By how much does the bar stretch?

    asked by Mary on November 27, 2016
  16. Physics-Average velocity

    The first controlled, sustained flight in a heavier-than-air craft was made by Orville Wright on December 17, 1903. The plane took off at the end of a rail that was 60 feet long, and landed 12 seconds later, 180 feet away from the beginning of the rail.

    asked by Destiny on October 3, 2017
  17. Physics

    In a control system, an accelerometer consists of a 5.15-g object sliding on a calibrated horizontal rail. A low-mass spring attaches the object to a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out

    asked by Abdalla A. on May 7, 2013
  18. Microeconomic

    The Urban Transit Authority receives the following two pieces of expert advice: 1. “You should cut rail fares in order to encourage greater use. Raising fares will mean fewer customers and lower revenue.” 2. “You cannot afford to cut fares as this

    asked by Cath on May 21, 2011
  19. Physics

    a stone falls from a rail road overpass which is 36ft. high into the path of the train which is approaching the overpass with the uniform speed, if the stone falls when the train is 50ft. away from the overpass and the stones hits the ground just as the

    asked by Andrea on December 19, 2011
  20. Physics

    A 0.20-kg billiard ball travelling at a speed of 15 m/s? strikes the side rail of a pool table at an angle of 60°. If the ball rebounds at the same speed and angle, what is the magnitude of its change in momentum? I need help!

    asked by Kayla on October 17, 2017
  21. Physics

    A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 336 m/s. a)An observer waiting at the crossing receives a frequency of 205 Hz. What is the speed of the train?

    asked by Ben on September 3, 2013
  22. physics

    A block and tackle with a velocity of 5 is used to raise a mass of 25kg through a vertical distance of 40cm at a steady rate,if the effort is equal to 60N,determine the distance moved by effort, work done by the effort in lifting the load and the loss of

    asked by happiness on January 29, 2015
  23. ENGLISH

    What do I capitalize? Which is correct in this sentence: California Gold Rush or California gold rush? Please support with the grammatical rule. The decline of whaling in America began with the California gold rush in 1849.

    asked by Cathy on September 25, 2007
  24. physics

    a block and tackle with a velocity ratio f 5 is used to raise a mass of 25kg through a vertical distance of 40cm at a steady rate.if the effort is equal to 60N .Determine 1.)the distance moved by he effort 2.)the work done by the effort in lifting the load

    asked by tobiloba on April 30, 2017
  25. Physics

    A small rocket is fired in a test range. It rises high into the air and soon runs out of fuel. On the way down it passes near an observer (sitting in a 22.5-m-high tower) who sees the rocket traveling at a speed of 37.9 m/s and moving in a vertical plane

    asked by Anonymous on January 28, 2014
  26. Physics-HELP

    An Olympic long jumper is capable of jumping 7.5 m. Assume that his horizontal speed is 8.8 m/s as he leaves the ground. How long is he in the air? How high does he go? Assume that he lands standing upright, that is, the same way he left the ground.

    asked by Manny on September 20, 2015
  27. Science

    Why is California’s high-speed rail such a groundbreaking effort? Why will it take so long to complete the high-speed rail route? Should other states wait to see if the high-speed rail system works well before starting their own plans for similar

    asked by Anonymous on December 7, 2018
  28. Science

    1. Why is California’s high-speed rail such a groundbreaking effort? 2. Why will it take so long to complete the high-speed rail route? 3.Should other states wait to see if the high-speed rail system works well before starting their own plans for similar

    asked by Princess Anna on December 23, 2013
  29. History HELP ASAP

    After the Civil War, how did the railroad unite Texas? A. Houston was connected to the rail system. B. By 1890, every large city in Texas was connected by at least two rail lines. C. Texans pulled together to create a statewide effort to build an efficient

    asked by @OfficialOliviaB. on January 29, 2019
  30. physics

    Each Steel Rail is 8.0 m long and has a cross sectional area of .0025msquared. on a hot day, each rail thermally expans as musch as 3.0 X 10EE-3. if there were no gaps between the rails, what would be the force on the ends of each rail?

    asked by Roxy on February 27, 2011
  31. Physics

    When railroad tracks are installed, gaps are left between the rails. Each steel rail is 8.0m long and has a cross-sectional area of 0.0020m^2. On a hot day, each rail thermally expands as much as 4.0mm. If there were no gaps between the rails, what would

    asked by Wendi on December 8, 2010
  32. History

    1. How did Farming continue to be profitable for landowners even after the end of slavery? Landowners convinced former slaves to work for free Landowners used child labor Landowners took advantage of sharecroppers***** Landowners only allowed former slaves

    asked by SwimmerGirl on January 24, 2018
  33. math

    Ellen works for a high-speed rail company that wants to develop a new rail line. Ellen’s project is to find a train that is the second fastest in the world. The Shinkansen Bullet Train in Japan is reported to go as fast as 320 kilometers per hour. The

    asked by Kayla on January 2, 2014
  34. science-urgent(plz help)!!!!

    a hockey stick has a mechanical advantage of 4. if the effort arm(which is the distance between the fulcrum and your pushing hand-effort)is 25cm long, how long is the stick? if your hand is pushing at a speed of 20km/h, how fast will the puck move?

    asked by -haya- on April 16, 2007
  35. Physics

    Among the safety features on elevator cages are spring-loaded brake pads which grip the guide rail if the elevator cable should break. Suppose that an elevator cage of 2000 kg has two such pads, arranged to press against opposite sides of the guide rail,

    asked by Corey on November 3, 2019
  36. PLEASE HELP D:

    Should other states wait to see if the high-speed rail system works well before starting their own plans for similar systems?

    asked by X3 ISayRawr on April 10, 2014
  37. Science

    Can Someone explain this? Should other states wait to see if the high-speed rail system works well before starting their own plans for similar systems?

    asked by EmberShy on March 7, 2017
  38. Physics

    A rough 4cm long plank is used road an inclined plane to raise a 500N bag up to the floor of a long lorry 2m high. 200j of work is done against friction between the bag and the plank.calculate (a) the total work done by effort (b) the efficiency of the

    asked by Anonymous on March 18, 2020
  39. My Grades

    Great News today I got my report card my average is 93.50 eng 7 99 outstanding effort good wk habits good partictipation math 7 91 outstanding effort enthusiatic learner good partictipation pleasure to have in sci 7R 80 satisfactory effort pleasure to have

    asked by Laruen on November 23, 2011
  40. physics

    A friend in a spaceship travels past you at a high speed. He tells you that his ship is 20m long and that the identical ship you are sitting in is 19m long. According to your observations, (a) how long is your ship?? (B) how long is his ship?? (c) what is

    asked by beth on May 29, 2007
  41. 8th Grade Math

    A ship leaves the East Coast for California. It is traveling at a constant speed of five knots and takes 200 days to reach California. The ship arrives in California at the exact time of day that it left the East Coast. How far did the ship travel? Please

    asked by Chris on December 7, 2012
  42. phsyics

    An accelerometer in a control system consists of a 4.70 g object sliding on a horizontal rail. A low-mass spring is connected between the object and a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out

    asked by Anonymous on October 10, 2012
  43. Physics- Elena please help!

    An accelerometer in a control system consists of a 2.42 g object sliding on a horizontal rail. A low-mass spring is connected between the object and a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out

    asked by Anonymous on October 7, 2012
  44. Physics- PLEASE HELP

    An accelerometer in a control system consists of a 2.42 g object sliding on a horizontal rail. A low-mass spring is connected between the object and a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out

    asked by Anonymous on October 9, 2012
  45. Physics URGENT!!!

    An accelerometer in a control system consists of a 2.42 g object sliding on a horizontal rail. A low-mass spring is connected between the object and a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out

    asked by Anonymous on October 9, 2012
  46. PHYSICS 1 ..lab helllpppppppp

    1.described the motion of mud that flies off from a rapidly spinning wheel. 2.explain why the outer rail is higher than the inner rail of curve in a railroad track. 3. a 5kg mass is moving in a circle of a radius 3m at a speed of 30 m/sec.determine the

    asked by JORHO on January 28, 2013
  47. physics

    the floor of a lorry is 3m high, a plank 5m long is used as an inclined plan to raise some leading the maximum effort required to raise 200N load up the plane

    asked by mike on June 13, 2017
  48. Geology--location of the university

    Is University of California, Riverside situated in Southern California or Northern California?

    asked by John on January 17, 2008
  49. science

    were must be the pivot situated on a straight lever 2m long,if a downward effort of 200N at one end is to lift a mass of 50kg at the other end.state the distance from the effort.

    asked by Douglas on March 10, 2017
  50. home economics

    What is the maximum amount it would be worth to shareholders to elicit high CEO effort all the time rather low CEO effort all the time?

    asked by cindy on November 22, 2011
  51. economics

    1. What is the maximum amount it would be worth to shareholders to elicit high CEO effort all the time rather low CEO effort all the time?

    asked by cindy on November 22, 2011
  52. physics

    It is possible to shoot an arrow at a speed as high as 80 m/s. If friction is neglected, how high would an arrow launched at this speed rise if shot straight up? How long would the arrow be in the air?

    asked by mb on September 18, 2008
  53. physics

    a ball is thrown vertically upward with a speed 25.0m/s (a)How high does it rise? (b)How long does it take to reach its highes point? (c)How long does it take to hit the ground after it reaches its highest point? (d)What is its speed when it returns to the

    asked by Anonymous on September 12, 2007
  54. Physics

    The system has two wheels and requires an effort of 12N to lift a load of 4kg at constant speed. Find M.A nd V.R.. Calculate work done by effort to raise load of 2m and efficiency of this machine.

    asked by Mutale on March 10, 2013
  55. physics

    A mag lev train traveling at 180 m/s towards a rail way crossing sounds its horn with a wavelength of 0.20 m. What is the frequency of sound that people waiting at the rail way crossing hear?

    asked by Steve on February 1, 2013
  56. gcse geography

    i need to do a case study on France and i have several questions i need help with.Do you know of any good websites that can help me. Some of the questions i need to answer and are struggling with are:- *Which other capital cities/major population centres

    asked by xavier on September 17, 2011
  57. Algebra 2

    1.) According to the American College Test (ACT), results from the 2004 ACT testing found that students had a mean reading score of 21.3 and a standard deviation of 6.0. The scores are normally distributed. A student scores a 35. What percent of the data

    asked by Lanie on April 4, 2014
  58. physics

    It is night and a wilderness camper is in distress. To signal for help, they take a flare gun into a clearing and fire a flare up from the ground at a speed of 15 m/s. a) How high does the flare make it into the sky? b) How long is the flare in the sky? c)

    asked by Anonymous on January 26, 2015
  59. algebra 2

    In 1862, two companies were given the rights to build a railroad from Omaha, Nebraska to Sacramento, California. The Central Pacific Company began from Sacramento in 1863 and averaged 8.75 miles of track per month. Twenty four months later the Union

    asked by Denice on September 10, 2017
  60. Physics

    1)a man uses a rope to haul a load of 750n up an wooden inclined plane of effective length 4.50m,1.5m high,the fractional force between the plane and the is 200n.find the; A)effort required to move to haul up the plane. B)volocity ratio C)useful work done

    asked by King Sọlọmọn on June 12, 2019
  61. other (trivia)

    thank you but i just need to know if california was the highest for 2007 because i can't download adobe player for pdf files, i would like to thank you however for all your help. I just need to know the current us state with the most automobiles

    asked by Shivangi on August 17, 2007
  62. Delta

    According to a previous report, 25% of households had some type of high-speed Internet connection. Suppose 8 households are selected at random and the number of households with high-speed Internet is recorded (a) Find the probability that exactly 3

    asked by Anonymous on July 6, 2016
  63. physics

    1. A small railroad engine is able to exert 8•105 N of pulling force. The coefficient of friction for steel wheels on steel rail is 0.4. Each rail car has the approximate mass of 20 tons How many cars can this engine pull on a level track?

    asked by hary on October 26, 2011
  64. physics

    A semi circular rail of horizontal diameter AB=2R is placed in a vertical plane. Two particles S1 and S2 of respective masses m1 and m2 (m1

    asked by vicky on October 7, 2016
  65. Physics

    The planet Tralfamador is a planet of mass M and radius R, and very thin atmosphere (neglect air resistance). A magnetic rail gun has been mounted on the surface of Tralfamador at the North pole. A projectile of mass m is fired from the magnetic rail of

    asked by J on May 1, 2013
  66. Science Help

    1.) A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg projectile remains on the rails of the gun for only 2.10x10-2 s, but in that time it goes from rest to a velocity of 4.00×103 m/s.

    asked by Kenny on October 18, 2014
  67. physics

    A black and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distance of 40cm at a steady rate.if the effort is equal to 60N, determine a. The distance moved by the effort b. The work done by the effort in lifting the

    asked by abubakar on March 7, 2015
  68. History

    why were commuter rail lines that were powered by electricity an improvement over earlier forms of commuter rail lines

    asked by 0GGG on November 6, 2017
  69. physics

    1) A certain aircraft has a liftoff speed of 111 km/h. (a) What minimum constant acceleration does the aircraft require if it is to be airborne after a takeoff run of 206 m? (b) How long does it take the aircraft to become airborne? 2) A ball is thrown

    asked by anon on September 15, 2019
  70. English

    What is Distributed Effort and why is it important? Please help! :'Thanks!:@ distributed effort In psychology, learning that involves small units of work and interpolated rest periods, as contrasted with massed learning, in which the individual works

    asked by Sanca & Cho on May 16, 2007
  71. high school economics - elasticity

    What can you conclude about elasticity of demand for rail service: Rail service has always been a losing proposition in Canada. Regardless of how much we raise our prices, we will never earn enough revenue to earn a profit. This is confusing because I

    asked by amy on March 25, 2010
  72. computers

    Write a vulnerability assessment report for an urban medical clinic serving low-income clientele as if you were a consultant. The clinic is located in the hot, dry desert region of Southern California, in a high-traffic, high-crime area.

    asked by cindy on October 7, 2008
  73. HHS 225

    I am supposed to write a vulnerability report for an urban medical clinic serving low-income clientele. The clinic is located in a hot, dry desert region of Southern California, in high-traffic, high-crime area; Where do i begin??????

    asked by Stacy on July 17, 2010
  74. Sentences

    Are my sentences correct with the following directions? (Sentences below directions) Using California as a topic, number and write one example of each of the following: 1. A completely correct simple sentence with an appositive in it. 2. A sentence with

    asked by Alyssa on November 3, 2011
  75. science

    10. Which of the following correctly describes a gamma ray? A. long wavelength and low frequency B. long wavelength and high frequency C. short wavelength in low frecuency D. short wavelength and high frequency 11. Which of the following is true about all

    asked by anonymous on April 23, 2020
  76. Physics

    A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 336 m/s. a)An observer waiting at the crossing receives a frequency of 205 Hz. What is the speed of the train?

    asked by Ben on September 3, 2013
  77. Math

    Mr.Customs is correcting the classes math home work on customary units. which of the following measurements are reasonable? A. a pencil is 12 ft. long. B. The back porch is 12 inches long C. the 3rd hole on the golf course is 123 miles long. D.the distance

    asked by Angel of Darkness/DarkUnicorn on December 11, 2018
  78. physics

    A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 330 m/s.

    asked by Anonymous on February 26, 2015
  79. Physics

    A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 332 m/s.

    asked by Anonymous on February 25, 2015
  80. US Gov.

    I am stuck on two questions that I can't find in the textbook or online and I don't have any idea how to get the answer since the class doesn't start until Thursday and the quiz is also on that day, please help. 1. It is proposed to split the state of

    asked by Harley on January 8, 2012
  81. analogies (just one)-- please help

    How about -- wolf:animal :: bird: rail wolf:_::_:rail

    asked by Ms. Sue on March 28, 2007
  82. value

    An Effort Of 250N Raises A Load Of 1000N Through 5m In A Pulley System.If The Effort Moves 30m,what Is; (a)the Work Done In Raising The Load (b)the Work Done By The Effort (c)the Efficiency

    asked by mr.m on February 5, 2017
  83. Math

    Mr. customs is correcting the class's math homework on customary units. which of the following measurements is reasonable? A pencil is 12 feet long. The back porch is 12 inches wide. The 3rd hole on the golf court is 123 miles long. The distance from new

    asked by LOVE on January 26, 2016
  84. Physics

    A block of tackle system of pulley consisting of 5 pulleys is used to raise a mass of 25kg through a vertical distance of 40cm at a steady rate. If the effort is equal to 60N, determine: a) The distance moved by the effort. b) The work done by the effort

    asked by Esther on January 16, 2020
  85. physics

    Rain drops do not accelerate for long terminal speed due to the vicious drag of the air.if this did not happen rain drop would hit us with a dangerous high speed.discuss

    asked by ameen on November 12, 2016
  86. Physics

    The floor of a lorry is 2.0m high. A plank 5m long is used as an inclined plane to raise some load up the lorry. If the efficiency of this machine is 50% what is the minimum effort (applied parallel to the plane) required to raise 200N load up the plane?

    asked by Anonymous on January 26, 2020
  87. History! Check my answers

    Question # 2: How did farming practices change as a result of the Dust Bowl? A. Farmers began using gasoline-powered tractors. B. Farmers practiced soil conservation methods. C. Farmers acquired new land that contained native plants. D. Farmers Used

    asked by Plz help Ms. Sue on March 14, 2018
  88. 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
  89. Stats

    According to a previous​ report, 15​% of households had some type of​ high-speed Internet connection. Suppose 12 households are selected at random and the number of households with​ high-speed Internet is recorded.​ (a) Find the probability that

    asked by Pandora on July 11, 2017
  90. Heat & Properties of Matter

    A rail way 50m long, with initial temperature of 20degree celsius subjected to a great heat. How much will it expand which its temperature is tripled?

    asked by Beta plus on October 18, 2009
  91. Physics

    A rail way 50m long, with initial temperature of 20degree celsius subjected to a great heat. How much will it expand when its temperature is tripled?

    asked by Beta plus on October 19, 2009
  92. math

    The California condor is the largest land bird in North America. One of the smallest is the bee hummingbird. 16. A bird’s wingspan is the distance from the tip of one wing to the tip of the other. A California condor can have a wingspan of 9 _ 12 feet. A

    asked by Anonymous on October 12, 2018
  93. Physics

    A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.20x10^4 rad/s to an angular speed of 3.14x10^4 rad/s. In the process, the bit turns through 1.92x10^4 rad. Assuming a constant angular acceleration, how long would it

    asked by Sam on October 23, 2012
  94. Healthcare Technology

    Analyze disaster vulnerabilities in health care and human service organization. Write a vulnerability assessment report for an urban medical clinic serving low-income clientele as if you were a consultant. The clinic is located in the hot, dry desert

    asked by ANYI on May 11, 2008
  95. Physics

    A stone is thrown straight upward with a speed of 12 m/s from the edge of a 70 m high cliff. How long is the stone in the air? What is the speed just before it hits the ground? What is the total distance the stone traveled?

    asked by Katie on September 12, 2012
  96. Foundations of Algebra

    20. Is it more difficult to walk up the ramp (6 ft high 8 ft long) or the hill (8 ft high, 12 ft long)? I am confused on this.

    asked by Roshni on January 18, 2017
  97. Geography

    Which is larger in land area, California or Missouri? i think it is california

    asked by Ian on October 4, 2006
  98. physics

    a projectile is thrown with the speed of 25 meter per seconds in a direction 30° above the horizontal. -how high does it go. -how long does it take to reach the maximum height. -how long does it reach the Projectile along in the air. -how far does it go.

    asked by zianna on July 21, 2012
  99. physics

    a projectile is thrown with the speed of 25 meter per seconds in a direction 30° above the horizontal. -how high does it go. -how long does it take to reach the maximum height. -how long does it reach the Projectile along in the air. -how far does it go.

    asked by zianna on July 21, 2012
  100. government

    the california state constitution can be amended if a. a majority of state senators passes the amendment b. the california supreme court orders an amendment c. two-thirds of both houses of the legislature approve the amendment, and a majority of california

    asked by jere on January 18, 2008