1. Vectors

    A fishing boat leaves port at 8 miles per hour at a bearing of 220∘ for 5 hours, then turns to a bearing of 270∘ at 11 miles per hour for 4 hours, and finally changes to a bearing of 300∘ at 9 miles per hour for 4 hours. At this point, the boat heads

    asked by Amber on November 7, 2016
  2. Child Development

    1) The recording method that's most useful in discovering the causes or results of a child's behavior is A. rating scale. B. time sampling. C. event sampling. D. checklist. 2) One way a teacher can help a child stand up for her rights is A. making other

    asked by Danielle on December 4, 2014
  3. World History (Ms. Sue)

    Do you agree with that which I have written in response to the topic that I was given? Explain how the Russian Revolution and the entry of the United States affected the course and outcome of World War I. That which I written: In 1917, the Russian

    asked by Victoria on November 17, 2014
  4. science

    When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these

    asked by kayci on May 12, 2010
  5. Maths

    How can answer this question ,help please? Information: A ship travels at a constant speed of 25 kilometres per hour (Kph) in a straight line from port A located at position (x_A, y_A) =(-100, -100) to port B at (x_B ,y_B )=(300 ,100) During its journey

    asked by Claire on May 5, 2011
  6. English

    It's time to take a test. Close your textbooks. I will hand out test papers. Take one and pass the rest to the back. When you receive an exam paper, make sure to write down your name and number on the top. I will give you 5 minutes.....Time is up. I will

    asked by rfvv on October 22, 2014
  7. physics

    A student wanted to drive from Austin to san Antonio ,80 mi south of Austin on highway I35. Unfortunately he entered in the wrong direction and drove to waco-100 miles north of Austin –before he noticed his error. In waco ,he turned around,drove back to

    asked by ashley on June 11, 2011
  8. essay excerpt edit

    can someone edit this? To contrast, in the film Tangled (2010) the mother of Rapunzel, who is exhibited as a Queen, also falls ill, although it is due to legitimate medical ailments, as opposed to a sense of helplessness. She is then limited to a bedridden

    asked by christine on November 2, 2014
  9. Math

    A rabbit travel 20 minutes in five minutes. At this speed how far can a rabbit travel in 12 minutes

    asked by Nhi on November 28, 2016
  10. Physics

    A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is connected to a spring that has negligible mass and a force constant of 260 N/m, as shown in the figure below. The spring is

    asked by JJ on February 27, 2016
  11. ph

    A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is connected to a spring that has negligible mass and a force constant of 300 N/m, as shown in the figure below. The spring is

    asked by carlton on November 14, 2011
  12. physics

    A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is connected to a spring that has negligible mass and a force constant of 300 N/m, as shown in the figure below. The spring is

    asked by carlton on November 14, 2011
  13. Physics

    A perfectly (non-head on) elastic collision occurs between a 0.25kg object moving east at 4m/s and a stationary 0.3kg object. Following the collision the 0.25kg object is moving at 2m/s. a) What is the speed of the 0.3kg object after the collision? I did:

    asked by Alex on May 22, 2008
  14. Physics

    A skydiver, who weighs 682 N, is falling at a constant speed with his parachute open. Consider the apparatus that connects the parachute to the skydiver to be part of the parachute. The parachute pulls upward with a force of 669 N. (a) What is the force of

    asked by Angie on January 25, 2010
  15. Physics

    A bomber flies horizontally with a speed of 175 m/s relative to the ground. The altitude of the bomber is 4780 m and the terrain is level. Neglect the effects of air resistance. gravity is 9.8 m/s a) How far from the point vertically under the point of

    asked by Anonymous on November 4, 2015
  16. physics

    questions( there are 3 so I will # 1-3) info: A 18.9 kg object is attached to a cord that is wrapped around a wheel of radius 10.7 cm. The acceleration of the object down the frictionless incline is measured to be .9 m/s2. Assume the axle of the wheel to

    asked by Ty on March 24, 2008
  17. Physics

    A bomber flies horizontally with a speed of 175 m/s relative to the ground. The altitude of the bomber is 4780 m and the terrain is level. Neglect the effects of air resistance. gravity is 9.8 m/s a) How far from the point vertically under the point of

    asked by Anonymous on November 3, 2015
  18. physics

    The launching mechanism of a toy gun consists of a spring of unknown spring constant, as shown in the figure below. If the spring is compressed a distance of 0.160 m and the gun fired vertically as shown, the gun can launch a 21.0-g projectile from rest to

    asked by Anonymous on March 21, 2013
  19. Physics

    An archer stands a horizontal distance d= 55 m away from a tree sees an apple hanging from the tree at h= 12 m above the ground. The archer chooses an arrow and prepares to shoot. The arrow is initially 1.5 m above the ground. Just as the archer shoots the

    asked by ss01 on September 22, 2013
  20. physics

    At the end of the semester, you are loading your gear into a van to go home. In loading the van, you can either lift a 45.0-kg crate straight up(method 1) or push it up a 3.00-m-long ramp that is inclined at an angle above the horizontal (method 2).In both

    asked by ajo on December 9, 2007
  21. physics

    A daredevil is dead set on jumping the Grand Canyon at its narrowest point (180 meters across). He has set up a ramp at 25 degrees and the ramp's release point is 20 meters above the rim of the canyon. He claims that his bike will be going 40m/s by the

    asked by Marty on September 22, 2013
  22. Physics need help now

    A daredevil is dead set on jumping the Grand Canyon at its narrowest point (180 meters across). He has set up a ramp at 25 degrees and the ramp's release point is 20 meters above the rim of the canyon. He claims that his bike will be going 40m/s by the

    asked by Marty on September 22, 2013
  23. Thermodynamics

    Hi, I am trying to do a prelab and I am really stuck... I have no idea how to go about this, I don't knwo if its worded funny or waht, so any help would be greatly apprecaited. The question is: (This is for a bomb calorimeter of constant volume) Benzoic

    asked by Tracy on October 3, 2007
  24. Biology

    1. In a plant’s stem, the vascular tissue (1 point) is always arranged in rings of vascular bundles. is continuous from the roots to the leaves.*** carriest nutrients up the stem but not down. plays a role in photosynthesis and storage. 2. Many cacti,

    asked by SkatingDJ on April 10, 2016
  25. 12th grade

    A projectile is shot from the edge of a cliff h = 125 m above ground level with an initial speed of v0 = 115 m/s at an angle of 37.0° with the horizontal, as shown in Fig. 3-39 (a) Determine the time taken by the projectile to hit point P at ground level.

    asked by sundus on September 22, 2009
  26. Math

    Jordan starts at his home and bikes along a country road. He bikes at a constant speed. Twenty minutes later he passes Stephanie's house; he knows he is 2 kilometers away from his home. Another one of his friends, Jacob lives 4 kilometers further down the

    asked by Jessica on December 4, 2012
  27. Health

    The coach noticed that Caleb really started to kick the soccer ball with great amount of power after the kicking drills. Caleb adjusted the power of his soccer kick by increasing the speed of his kicking leg prior to and upon contact with the ball starting

    asked by Ben on January 30, 2014
  28. Physics

    A 1100 kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m. (a) If the road is completely level, what is the constant force applied to the car to

    asked by Phil on September 16, 2010
  29. Math

    A fishing boat leaves port at 5 miles per hour at a bearing of 350∘ for 2 hours, then turns to a bearing of 40∘ at 12 miles per hour for 2 hours, and finally changes to a bearing of 180∘ at 10 miles per hour for 5 hours. At this point, the boat heads

    asked by Sam on December 3, 2014
  30. Math

    A fishing boat leaves port at 5 miles per hour at a bearing of 350∘ for 2 hours, then turns to a bearing of 40∘ at 12 miles per hour for 2 hours, and finally changes to a bearing of 180∘ at 10 miles per hour for 5 hours. At this point, the boat heads

    asked by Sam on December 3, 2014
  31. Math

    A fishing boat leaves port at 5 miles per hour at a bearing of 350∘ for 2 hours, then turns to a bearing of 40∘ at 12 miles per hour for 2 hours, and finally changes to a bearing of 180∘ at 10 miles per hour for 5 hours. At this point, the boat heads

    asked by Sam on December 3, 2014
  32. physics

    An astronaut comes loose while outside the spacecraft and finds himself floating away from the spacecraft with only a big bag of tools. In desperation, the astronaut throws his bag of tools in the direction of his motion (away from the space station). The

    asked by Johnny on October 9, 2014
  33. physics

    The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a centrifuge. This machine consists of a long arm, to one end of which is attached

    asked by Tyler on January 26, 2017
  34. physics

    The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a centrifuge. This machine consists of a long arm, to one end of which is attached

    asked by D on November 7, 2012
  35. physics

    A small particle of mass 2.0 x 10^-19 kg is attached to a string of relaxed length 0.50 nm .The string is the black horizontal line attached to a an immovable wall on the left. The plot is a graph of the force needed to stretch the string by pulling to the

    asked by maggie on November 21, 2009
  36. physics

    A small particle of mass 2.0 x 10^-19 kg is attached to a nanofiber of relaxed length 0.50 nm (Recall that 1.0 nm + 10^-9 m) . The nanofiber is the black horizontal line-its attached to a substrate (an immovable wall) on the left. The plot is a graph of

    asked by Maggie on November 22, 2009
  37. physics

    A small particle of mass 2.0 x 10^-19 kg is attached to a nanofiber of relaxed length 0.50 nm (Recall that 1.0 nm = 10^-9 m) . The nanofiber is the black horizontal line-its attached to a substrate (an immovable wall) on the left. The plot is a graph of

    asked by maggie on November 23, 2009
  38. physics

    Scientists want to place a 3100 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.9 times the radius of Mars above the surface of the planet. Here is some information that will help solve this problem: mmars =

    asked by Austin on October 14, 2018
  39. physics

    A large, cylindrically-shaped weight is suspended from a long spring found hanging from a rafter. The weight is slender metal cylinder about two meters long that is suspended with its flat bottom about half meter above the level concrete floor. When a 1 kg

    asked by sand on December 27, 2011
  40. physics

    An 6.00 g bullet is fired into a 2.30 kg block initially at rest at the edge of a frictionless table of height 1.00 m. The bullet remains in the block, and after impact the block lands 2.00 m from the bottom of the table. Determine the initial speed of the

    asked by Jessi on March 24, 2009
  41. physics

    A 124- balloon carrying a 22- basket is descending with a constant downward velocity of 27.4 A 1.0- stone is thrown from the basket with an initial velocity of 20.0 perpendicular to the path of the descending balloon, as measured relative to a person at

    asked by salem on April 1, 2012
  42. physics

    A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward one another along a straight, level track. When they are 950m apart, each engineer sees the other’s train and applies the brakes. The brakes decelerate each train

    asked by jenny on September 18, 2006
  43. physics

    A small mass m hangs at rest from a vertical rope of length l that is fixed to the ceiling. A force F then pushes on the mass, perpendicular to the taut rope at all times, until the rope is oriented at an angle (theta)=(theta)0 and the mass has been raised

    asked by sophie on May 22, 2012
  44. Physics

    An object is projected at an angle of 53.1degrees above the horizontal at a speed of 50m/s. Sometime later it enters a narrow tube positioned at an angle of 45degrees to the vertical. Determine: a) The initial horizontal and vertical components of

    asked by Anonymous on March 13, 2008
  45. Math/calculus

    a toy rocket is shot into the air at the top of a building so that its height above the ground t seconds after the rocket is launched is given by the formula h(t)= -3t cubed + 6t squared + 27t feet from liftoff until the rocket crashes into the ground.

    asked by lola on July 13, 2012
  46. physics

    A military helicopter on a training mission is flying horizontally at a speed of 75.0m/s when it accidentally drops a bomb (fortunately, not armed) at an elevation of 310m . You can ignore air resistance. a:How much time is required for the bomb to reach

    asked by kaitlyn on September 22, 2014
  47. physics

    An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that a person inside is stuck to the wall and does not slide down when the floor drops away. The acceleration of gravity is 9.8 m/s2 .Given g = 9.8 m/s2, the

    asked by andres on October 14, 2013
  48. Physics(IMPORTANT)

    A small object of mass m= 90 kg slides down a spherical dome of radius R=12 m without any friction. It starts off at the top (polar angle θ=0) at zero speed. Use g=10 m/s2. (See figure) (a) What is the magnitude of the force (in Newtons) exerted by the

    asked by keitanako on November 1, 2013
  49. Physics.

    You are at the top of the Empire State Building on the 102nd floor, which is located 373 m above the ground, when your favorite superhero flies over the building parallel to the ground at 60.0 % the speed of light. You have never seen your favorite

    asked by Anon. on April 16, 2008
  50. physics

    Two small spaceships, each with mass m = 2000 kg, are in the circular Earth orbit of the figure, at an altitude h of 420 km. Igor, the commander of one of the ships, arrives at any fixed point in the orbit 90.0 s ahead of Picard, the commander of the other

    asked by kendell on January 3, 2011
  51. Physics

    Sam pushes crates starting form rest across the floor of his classroom for 3 s with a net force as shown above. For each crate, rank the following from greatest to least: A 100N/30kg, B 75N/20kg C 50N/10kg 1. Impulse delivered 2. Change in momentum 3.

    asked by Kay on November 12, 2014
  52. Physics

    A toy dart gun has a spring with a spring constant of 315 N/m. An 12 gram dart is loaded in the gun and the spring is compressed a distance of 7.8 cm and then shot into the air. When the dart is 5.8 meters high in the air, what is its speed? If the maximum

    asked by Jon on March 31, 2014
  53. Physics

    The launching mechanism of a toy gun consists of a spring of unknown spring constant, as shown in Figure P5.33a. If its spring is compressed a distance of 0.140 m and the gun fired vertically as shown, the gun can launch a 24.0 g projectile to a maximum

    asked by Sarah on June 16, 2011
  54. Math- Algebra

    A motorist was to travel from town A to town B, a distance of 80 miles. He traveled the first 24 minutes at a certain rate; traffic then increased and for the next 6 minutes he averaged 10 miles per hour less than his original speed; then traffic eased up

    asked by Jennifer on October 20, 2013
  55. Physics Class

    A 0.140-kg baseball is pitched horizontally at 36.7 m/s. When a player hits the ball, it moves at the same speed, but in the opposite direction. If the bat and the ball are in contact for 0.450 ms, calculate the average force the bat exerts on the ball.

    asked by JLW Physics on January 16, 2015
  56. physics

    A mass m = 76.0 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 19.7 m and finally a flat straight section at the same height as the center of the loop (19.7 m off the ground). Since the mass would not make it

    asked by Anonymous on September 28, 2012
  57. PHYSICS

    1. What is the weight of a 2.88 kg snake? 2. A girl drops a rock straight down from a bridge. Assume negligible air resistance. How fast is it going 4.0 s later? 3. A rock with a mass of 22.45 kg is falling from a tall tower. a. What is the Net Force if

    asked by Hayden on December 21, 2012
  58. physics

    A policeman with a very good ear and a good understanding of the Doppler effect stands on the shoulder of a freeway assisting a crew in a 40-mph work zone. He notices a car approaching that is honking its horn. As the car gets closer, the policeman hears

    asked by maria on November 15, 2011
  59. Physics

    While a person is walking, his arms swing through approximately a 45° angle in .530s. As a reasonable approximation, we can assume that the arm moves with constant speed during each swing. A typical arm is 70.0 cm long, measured from the shoulder joint.

    asked by GG on February 16, 2012
  60. Math

    An airplane in Australia is flying at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of

    asked by Dee on February 1, 2015
  61. Calculus

    At the scene of an accident, there are skid marks which are 200 feet long showing where a car put on the brakes. The driver swears that he was obeying the speed limit. If we assume that the car braked with a constant deceleration of 16ft/sec^2. We can

    asked by Naomi on April 4, 2017
  62. Physics Help

    While a person is walking, his arms swing through approximately a 45° angle in .530s. As a reasonable approximation, we can assume that the arm moves with constant speed during each swing. A typical arm is 70.0 cm long, measured from the shoulder joint.

    asked by GG on February 16, 2012
  63. physics, help urgent!

    charge Q = +4.5 ƒÝC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 ƒÝC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the

    asked by Brette on November 14, 2012
  64. physics

    A car is traveling at a constant initial velocity of 100km/h on a level portion of road. It encounters a 6 percent incline (tan(theta)= 6/100) at point A and the car decelerates at a constant rate of gsin(theta). Find the speed of the car (a) 10 seconds

    asked by Jessi on October 4, 2009
  65. Writing

    this is an SAT essay starting with the prompt and i would appreciate it if people that know the rubric well would grade this on the 6 scale. thank you. Excerpt - many among us like to blame violence and immorality in the media for a "decline in morals" in

    asked by Arick on September 9, 2008
  66. english

    Which of the following contains a comma splice? Geraldine is a volleyball star, she generated most of the points for her team. ** Obviously, the pull of gravity effectively keeps us from flying off into space. The letter on the coffee table, a note from

    asked by matthew on May 30, 2017
  67. SS PANAMA QUIZ

    Mexico City's pollution problem is made worse by its Farmland Mass Transit System Squatters Geography*** Why did the US first need to negotiate with Colombia to build the Panama Canal? Colombia was a neighboring country Part of the canal would be located

    asked by Caleidoscope on April 29, 2015
  68. physics

    In Figure 8-50, a block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level, where a frictional force stops the block in a distance d. The

    asked by Anonymous on February 19, 2011
  69. Physics

    A. Use the relation 2 m m m GM g R ƒ­ to find the acceleration due to gravity on the surface of the Moon. You can use the following data: Mass of the Moon m M = 7.35 ¡Ñ 1022 kg. Radius of the Moon m R = 1.74 ¡Ñ 106 m. B. How does this value compare

    asked by Anonymous on October 24, 2010
  70. Algebra 2

    A commercial freight carrier is flying at a constant speed of 400 mi/h and is traveling 4 miles east for every 3 miles north. A private plane is observed to be 210 miles east of the commercial carrier, traveling 12 miles north for every 5 miles west. a. If

    asked by newt on September 28, 2009
  71. Science

    the Barn Owl's body has two stomachs, the first is a glandular stomach which uses chemicals called enzymes to break down the prey into nutritious parts and waste parts. Along with pressure from the second muscular stomach, the fleshy portions are separated

    asked by Mishyyy on November 12, 2006
  72. Physics-- urgent

    A block of mass m = 3.20kg slides from rest a distance d down a frictionless incline at angle θ = 30.0° where it runs into a spring of spring constant 425 N/m. When the block momentarily stops, it has compressed the spring by 22.0 cm. (a) What is the

    asked by Anonymous on October 25, 2011
  73. pre cal

    An airplane is flying at a speed of 350 mi/h at an altitude of one mile. The plane passes directly above a radar station at time t  0. (a) Express the distance s (in miles) between the plane and the radar station as a function of the horizontal distance d

    asked by Danielle on May 1, 2014
  74. Math

    A fishing boat leaves port at 12 miles per hour at a bearing of 70∘ for 5 hours, then turns to a bearing of 130∘ at 9 miles per hour for 5 hours, and finally changes to a bearing of 50∘ at 9 miles per hour for 2 hours. At this point, the boat heads

    asked by wes on November 11, 2018
  75. science

    4. Convert to centimeters: 6.8 meters A. 6,800 centimeters B. 68 centimeters C. 68,000 centimeters D. 680 centimeters 5. What is the difference between a theory and an opinion? A. A theory is supported by scientific evidence, while an opinion is not. B. An

    asked by rachel help asap ms.sue on October 27, 2014
  76. Management Accounting

    Deer Valley Lodge, a ski resort in the Wasatch Mountains of Utah, has plans to eventually add five new chair lifts. Suppose that one lift costs $2 million and preparing the slope and installing the lift costs another $1.3 million. The lift will allow 300

    asked by please help !!! on May 25, 2007
  77. Algebra

    A motorist was to travel from town A to town B, a distance of 80 miles. He traveled the first 24 minutes at a certain rate; traffic then increased and for the next 6 minutes he averaged 10 miles per hour less than his original speed; then traffic eased up

    asked by Jane on October 24, 2013
  78. physics

    During liftoff, a hot-air balloon accelerates upward at a rate of 2.5 . The balloonist drops an object over the side of the gondola when the speed is 12 . a)What is the magnitude of the object’s acceleration after it is released (relative to the ground)?

    asked by sammy on September 29, 2012
  79. Physics

    I have a few questions to answer and I don't know how to start answering them. 1. On a position time graph, compare the instantaneous velocities of an object when the tangent to the curve slopes upward to the right, when the tangent slopes downward to the

    asked by Sups on February 3, 2011
  80. physics

    Altitude of 575m with zero initial velocity; 8.0s she falls freely; rate of descent et 15m/s^2 until her rate of descent reaches 5.0m/s.At this point she adjust her rocket engine control to maintain that her rate of descent until she reaches ground. (a) on

    asked by rush on October 8, 2009
  81. physics

    Altitude of 575 with zero initial velocity; 8.0s she falls freely; rate of descent et 15m/s^2 until her rate of descent reaches 5.0m/s.At this point she adjust her rocket engine control to maintain that her rate of descent until she reaches ground. (a) on

    asked by rush on October 8, 2009
  82. computers

    Imagine that you have been hired as an IT consultant and have been asked to write a recommendation for an OS. This start-up company primarily develops games and has approached you to recommend an OS for its 25 employees who use desktop PCs. The primary

    asked by Samantha on May 10, 2012
  83. physics

    An egg is thrown nearly vertically upward from a point near the cornice of a tall building. It just misses the cornice on the way down and passes a point a distance 48.0 m below its starting point at a time 5.00s after it leaves the thrower's hand. Air

    asked by aisha on March 5, 2012
  84. Physics

    You are in a hot-air balloon that, relative to the ground, has a velocity of 6.14 m/s in a direction due east. You see a hawk moving directly away from the balloon in a direction due north. The speed of the hawk relative to you is 2.44 m/s. What are (a)

    asked by StressedStudent on September 18, 2012
  85. physics

    You are in a hot-air balloon that, relative to the ground, has a velocity of 5.40 m/s in a direction due east. You see a hawk moving directly away from the balloon in a direction due north. The speed of the hawk relative to you is 1.05 m/s. What are (a)

    asked by Eali on September 30, 2014
  86. Algebra

    How do I solve this? A plane flying the 3458-mi from New York City to London has a 50-MPH tailwind. The flight's point of no return is the point at which the flight time required to return to New York is the same as the time required to continue to London.

    asked by Lee on May 9, 2016
  87. Environmental Science

    are these correct? 29. A common feature of thermal pollution and artificial eutrophication is that they both a. ave sources that are idfficult to identify and control b. cause large mats of algae to bloom in fresh water c. are a result of power plants and

    asked by y912f on February 1, 2010
  88. trig

    An airplane is heading north at an airspeed of 500 km/hr, but there is a wind blowing from the northwest at 50 km/hr. how many degrees off course will the plane end up flying, and what is the plane's speed relative to the ground? So here is my work...

    asked by Dan on May 28, 2015
  89. physics

    two students are on a balcony 20.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way

    asked by fsfsf on March 2, 2011
  90. physics

    two students are on a balcony 20.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way

    asked by fsfsf on March 2, 2011
  91. Physics

    A tetherball apparatus consists of a ball attached to a 2.10 m rope that is attached in turn to the top of a 3.10 m tall pole. The ball is struck such that it moves horizontally around the pole. Immediately after the ball is struck, it moves at 5.57 m/s,

    asked by Leah on November 14, 2017
  92. physics

    A ball is thrown upward. Its initial vertical component of velosity is 30m/s and its initial horizontal component of velosity is 20m/s. What is the ball's speed 2 s later? Give: Viy = 30m/s Vix = 20m/s T = 2 sec a) V = gt =10m/sec2 x 2 sec= 20 m/sec b) c2

    asked by arlene on March 16, 2015
  93. physics

    A block of mass M hangs from a rubber cord. The block is supported so that the cord is not stretched. The unstretched length of the cord is L0 and its mass is m, much less than M. The "spring constant" for the cord is k. The block is released and stops at

    asked by Stephen on December 1, 2009
  94. Physics

    A 1100 kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m. (a) If the road is completely level, what is the constant force applied to the car to

    asked by Phil on September 16, 2010
  95. physics

    A jet plane is flying with a constant speed along a straight line, at an angle of 30.0° above the horizontal, as shown in part (a) of the drawing. The plane has a weight of magnitude 87500 N, and its engines provide a forward thrust . In addition, the

    asked by ODU on July 25, 2013
  96. Physics

    Two planes are about to drop an empty fuel tank. At the moment of release each plane has the same speed of 135 m/s, and each tank is at the same height of around 2.00km above the ground. Although the speeds are the same, the velocities are different at the

    asked by Anonymous on June 6, 2012
  97. Physics

    A person driving her car at 54 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection. The intersection is

    asked by Sydney on September 11, 2011
  98. calculus

    Two commercial airplanes are flying at an altitude of 40,000 ft along straight-line courses that intersect at right angles. Plane A is approaching the intersection point at a speed of 429 knots (nautical miles per hour; a nautical mile is 2000 yd or 6000

    asked by Avi on September 27, 2012
  99. physics question

    For a science fair competition, a group of high school students built a kicker -machine that can launch a golf ball from the origin with a velocity of 11.2m/s and initial angle of 31.5° with respect to the horizontal. a) Where will the golf ball fall back

    asked by himel on August 17, 2016
  100. physics

    A typical baseball has mass of 150 grams. Suppose a batter hits a fastball pitched to him at 92 mph (which is about 40.89 m/s). After contact, the ball's speed is measured as 104 mph (which is about 46.22 m/s) directly back at the pitcher (who is able to

    asked by Anonymous on May 12, 2013

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