1. Chemistry

    Consider the chemical reaction below equated   2N2O5 (g) -> 4NO2 (g) + O2 (g) knowing that a certain period of time, N2O5 consumption rate is 0.10 mole / s, determine for the same time interval: a) the average rate of formation of NO2 b) the average speed

    asked by Selena on January 20, 2016
  2. Physics

    A block of mass 3.42 kg is drawn at constant speed a distance of 1.32 m along a horizontal floor by a rope exerting a constant force of magnitude 8.62 N and making an angle of 17.0 degrees above the horizontal. Compute the coefficient of friction between

    asked by CPhy on April 18, 2013
  3. Physics

    A bucket of mass 2.20 kg is whirled in a vertical circle of radius 1.40 m. At the lowest point of its motion the tension in the rope supporting the bucket is 30.0 N. Find the speed of the bucket. How fast must the bucket move at the top of the circle so

    asked by Lilly on October 23, 2011
  4. Physics Circular Motion

    A 0.40-kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 2.0 m on a frictionless horizontal surface. If the cord will break when the tension in it exceeds 75 N, what is the maximum speed the ball can have? May someone

    asked by Mike Joseph on June 16, 2012
  5. physics

    A ball is thrown vertically upward with a speed of 19.0 m/s. (a) How high does it rise? (b) How long does it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity

    asked by jojo on January 31, 2016
  6. physics

    a car moving on a straight road with a speed of 20m/s. at t=0 the driver of the car applies the breaks after watching an obstacle 150m ahead. after application of breaks, the car retards with 2m/s^2. find the position of the car from the obstacle at t=15s.

    asked by pavatharani on July 3, 2011
  7. physics

    You have arrived at a new planet and put your starship into a circular orbit at a height above the surface that is equal to two times the radius of the planet. Your speed is 4300 m/s and it takes 7 hours and 18 minutes to complete an orbit. a. What is the

    asked by help please on December 11, 2011
  8. physics

    Three identical balls are thrown from the top of a building, all with the same initial speed. The first is thrown horizontally, the second at some angle above the horizontal, and the third at some angle below the horizontal. Neglecting air resistance, rank

    asked by matt on October 5, 2010
  9. college physics

    Three identical balls are thrown from the top of a building, all with the same initial speed. The first is thrown horizontally, the second at some angle above the horizontal, and the third at some angle below the horizontal. Neglecting air resistance, rank

    asked by matt on October 5, 2010
  10. physics

    A brick is dropped (zero initial speed) from the roof of a building. The brick strikes the ground in 3.05 s. You may ignore air resistance, so the brick is in free fall. (a) How tall, in meters, is the building? (b) What is the magnitude of the brick's

    asked by kylie on December 15, 2016
  11. physics ..PLEASE HELP ASSIGN DUE SOON :(

    The sound intensity of 1.2x10-12J/m2s is the threshold of hearing for humans. What is the amplitude of the motion of the air molecules if the speed of sound in the air is 343m/s and the density of air is 1.28kg/m^3? Take the frequency of the air molecules

    asked by joane on November 26, 2012
  12. Physics

    billy and amy want to ride their bikes from their neighborhood to school which is 14.4 kilometers away. it takes amy 41 minutes to arrive at school. bill arrives 21 minutes after amy. how much faster (in meters/second) is amy's average speed for the entire

    asked by Ana on January 19, 2012
  13. physics

    A bucket of mass 2.20 kg is whirled in a vertical circle of radius 1.15 m. At the lowest point of its motion the tension in the rope supporting the bucket is 28.0 N. a) Find the speed of the bucket. b)How fast must the bucket move at the top of the circle

    asked by jess on November 4, 2010
  14. Honors Pre-Calculus

    You are traveling in a car toward a certain mountain at a speed of 80km/hr. The apparent size of the mountain is .5degrees. Fifteen minutes later the same mountain has an apparent size of 1 degree. About how tall is the mountain? I believe you must convert

    asked by Anonymous on September 17, 2007
  15. physics

    A jet pilot takes his aircraft in a vertical loop.f the jet is moving at a speed of 1500 km/h at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.0 g's.

    asked by Anonymous on October 18, 2010
  16. Physics

    Salmon often jump upstream through waterfalls to reach their breeding grounds. One salmon came across a waterfall 1.30 m in height, which she jumped in 1.3 s at an angle of 72° to continue upstream. What was the initial speed of her jump? (Assume the

    asked by James on May 21, 2012
  17. Algebra

    A group of people are tubing down a river at an average speed of mi/h. Write a direct variation equation that gives the number of miles y that the people will float in x hours. Graph the equation and use the graph to find the distance traveled in 2.5

    asked by Cairo on September 25, 2017
  18. physics

    A ball is thrown vertically upward with a speed of +10.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is its

    asked by seanso on January 23, 2012
  19. Physics

    A top fuel dragster can complete a quarter-mile (402 meters) in 4.7 seconds. Assuming that the vehicle starts from rest and that acceleration is constant, calculate (a) the acceleration and (b) the final speed of the top fuel dragster.

    asked by Megan on July 21, 2017
  20. physics

    Two fighter jets are flying towards each other. Jet A, with a mass of 15000 Kg, is traveling to the right with a speed of 255 m/s, whereas Jet B, with a mass of 34000 kg, is traveling to the left at 145 m/s. If the collision is perfectly inelastic,

    asked by sand on January 21, 2012
  21. physics

    A ball is thrown vertically upward with a speed of +13.0 m/s. (a) How high does it rise? (b) How long does it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity

    asked by ashley on September 15, 2011
  22. PHYSICS

    Ana run in a circular path. The dimension of the circular path is r = 10m , she finished it in 20 seconds. Find his speed, distance, displacement and velocity. 10m east (starting point) and 10 m south (finish point)

    asked by SUZI on July 23, 2014
  23. Physics HELP!!

    The sound intensity of 1.2x10-12J/m2s is the threshold of hearing for humans. What is the amplitude of the motion of the air molecules if the speed of sound in the air is 343m/s and the density of air is 1.28kg/m^3? Take the frequency of the air molecules

    asked by rory on November 24, 2012
  24. physics

    A daredevil is shot out of a cannon at 36.5◦ to the horizontal with an initial speed of 36.1 m/s. A net is positioned a horizontal distance of 25.7 m from the cannon. At whatheight abovethecannon shouldthe net be placed in order to catch the daredevil?

    asked by Anonymous on August 28, 2014
  25. physics

    A subway accelerate gradually (a= 1.2 m/s/s) from rest at one station until it is halfway to the next station and then decelerates gradually (a=-1.2 m/s/s) for the final half of the trip until it comes to rest. The two stations 1100 m apart. A) what is the

    asked by Diya on September 21, 2014
  26. Physics

    A ball is thrown vertically upward with a speed of 15.0 m/s. (a) How high does it rise? (b) How long does it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity

    asked by Kelly on September 21, 2012
  27. geography

    what is a circulating current of magma It is boiling hot melted rock, moving about in some circular flow. Apparently there are places underground where magma (molten basalt above 1000 C) circulates in a flow loop, up and down, without reaching the surface.

    asked by Anonymous on January 24, 2007
  28. Languagre Arts

    Pam is practical. Every night before she goes to bed, Pam makes a list of what she needs the next day. She puts down items like return library books and hem dress for Margo's party on Saturday. When the list is made she numbers the items in order of

    asked by Hayley on August 8, 2017
  29. College Chemistry

    Using the values for the heat of fusion, specific heat of water, or heat of vaporization, calculate the amount of heat energy in each of the following: * calories removed to condense 125g of steam at 100 degree C to cool the liquid to 15 degree C * joules

    asked by Kell on September 16, 2010
  30. Physics

    A ball whirls around in a vertical circle at the end of a string. The other end of the string is fixed at the center of the circle. Assume that the total energy of the ball-Earth system remains constant. (a) What is the tension in the string at the bottom?

    asked by matt on October 21, 2013
  31. physics

    A ball whirls around in a vertical circle at the end of a string. The other end of the string is fixed at the center of the circle. Assume that the total energy of the ball-Earth system remains constant. (a) What is the tension in the string at the bottom?

    asked by ahmad on March 18, 2013
  32. Physics

    A train slows down as it rounds a sharp horizontal turn, going from 86.0 km/h to 44.0 km/h in the 13.0 s that it takes to round the bend. The radius of the curve is 140 m. Compute the acceleration at the moment the train speed reaches 44.0 km/h. Assume the

    asked by Angel on October 10, 2017
  33. Physics

    Two boxes on a horizontal surface, as shown in the figure above, are moving together under the influence of a horizontal force, F. The coefficient of kinetic friction between the boxes and the surface is 0.40. Use g = 10 m/s2. In case (a), a horizontal

    asked by Jeanne on October 10, 2011
  34. Physics

    1. There is a 10 kg textbook resting on a table (1m) above the ground, you want to raise the book 0.8m above that. a. What is the change in potential energy to do so? (I did w= 1.8*98?) b. If you hold the book there (0.8 above the table) for 10m what is

    asked by Alex on February 1, 2019
  35. Science

    Alright i forgot my science book and theres a paper due soon so i was wondering if i could get some answers to these questions. List Three Ways That Substances can move in and out of a cell. In diffusion, molecules move from an area of _________

    asked by blah on January 29, 2008
  36. english

    i had to write a paper on the following: details that show the impact of the problem (effects) on jack ruth and the company section 2 the steps needed to change the situation reason to implement each step, including the benefits to your employees, your

    asked by ron on October 30, 2009
  37. physics

    Short projectile motion question a peron kicks a football from 39.6 meters from the goal posts. the kcik leaves the ground with a speed of 24.8m/s at an angle of 49.6 degrees. the goal post are 3.10 meters high determine the amount by which the kick clears

    asked by jake on March 16, 2010
  38. Science Psysics

    A 6 kg black is placed at the very top of a ramp that is inclined at 31 degrees and the block is released to slide down the ramp. As the block slides friction exerts a constant resistive force of 17N directed back up the ramp What is the block's speed when

    asked by Amy on November 2, 2016
  39. Physics

    To win the game, a place kicker must kick a football from a point 19 m from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 16 m/s at an angle of 59.8 from the horizontal. The

    asked by ferras on November 4, 2012
  40. physics 2 HELP PLEASE!!

    Can someone help break this down.. Please tell me if what I identified is so far correct. Also what equations should I use??? x1= 10m x2=? v1= 1.2 m/s v2=? a= -9.8 m/s^2 t= ? 1.) a diver runs horizontally with a speed of 1.2 m/s off a platform that is 10.0

    asked by Heather on February 3, 2016
  41. phys

    Sam is taking his girlfriend Sally out for a ride in his boat. He starts out at rest. He accelerates with an acceleration of 0.199 m/s^2 for 83.9 s. At that time Sally decides they are going fast enough and the boat moves at constant speed for a distance

    asked by ami on November 24, 2009
  42. Physics

    The model airplane in figure below is flying at a speed of 21 m/s on a horizontal circle of radius 18 m. The mass of the plane is 0.82 kg. The person holding the guideline pulls it in until the radius becomes 11 m. The plane speeds up, and the tension in

    asked by Elizabeth on October 20, 2012
  43. physical science

    In the cabin of a jetliner that travels at 600 km/h, a pillow drops from an overhead rack into your lap below. Since the jetliner is moving so fast, why doesn't the pillow slam into the rear compartment of the plane? What is the horizontal speed of the

    asked by Justin on November 15, 2010
  44. Geometry

    Wilbur Wrong is flying his remote-control plane inn a circle with the radius 28 meters. He is holding the wire so that it is level with the ground. His brother, Orville Wrong, clocks the plane at 16 seconds per revolution. What is the speed of their plane?

    asked by Keenan on May 17, 2011
  45. physics

    A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of θ = 36° when they move past

    asked by demi on September 6, 2010
  46. Physics

    The moment of inertia of a solid uniform sphere of mass M and radius R is given by the equation I=(2/5)MR2 . Such a sphere is released from rest at the top of an inclined plane of height h, length L, and incline angle è. If the sphere rolls down the

    asked by Anonymous on April 7, 2011
  47. physics

    A hockey player is standing on his skates on a frozen pond when an opposing player, moving with a uniform speed of 12 m/s, skates by with the puck. After 2.0 s, the first player makes up his mind to chase his opponent. If he accelerates uniformly at 4.0

    asked by ashley on September 15, 2011
  48. physics

    A projectile is fired horizontally from a gun that is 97.0 m above flat ground, emerging from the gun with a speed of 250 m/s. (a) How long does the projectile remain in the air? s (b) At what horizontal distance from the firing point does it strike the

    asked by johnny on December 13, 2008
  49. physics

    An archer puts a 0.26-kg arrow to the bow-string. An average force of 200 N is exerted to draw the string back 1.4 m. (a) Assuming no frictional loss, with what speed does the arrow leave the bow? m/s (b) If the arrow is shot straight up, how high does it

    asked by Haley on May 10, 2012
  50. physics

    A 11.0kg weather rocket generates a thrust of 230N . The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 510 N/m , is anchored to the ground. After the engine is ignited, what is the

    asked by Anonymous on November 13, 2010
  51. Physics

    A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 3.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 60° when they move past the

    asked by Steph on February 16, 2014
  52. Physics

    In an arcade game a 0.087 kg disk is shot across a frictionless horizontal surface by com- pressing it against a spring and releasing it. If the spring has a spring constant of 163 N/m and is compressed from its equi- librium position by 4 cm, find the

    asked by Anna on January 18, 2011
  53. physics

    A coin with a diameter of 2.10 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 13.3 rad/s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude

    asked by Anonymous on November 15, 2011
  54. Physics

    The captain of a plane wishes to proceed due west. The cruising speed of the plane is 255 m/s relative to the air. A weather report indicates that a 39.0-m/s wind is blowing from the south to the north. In what direction, measured with respect to due west,

    asked by Shelby on September 12, 2016
  55. trigonometry

    An airbus A320 aircraft is cruising at an altitude of 10000 m. The aircraft is flying in a straight line away from Rachel, who is standing on the ground. If she sees the angle of elevation of the aircraft change from 70 degrees to 33 degrees in one minute,

    asked by ann on January 20, 2010
  56. physics

    A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 4.15 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25° when they move past the

    asked by ba on September 19, 2010
  57. physics

    A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 8.1 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of θ = 25° when they move past

    asked by Cody on February 3, 2012
  58. physics

    A tennis player serves a tennis ball it is moving horizontally when it leaves the racquet. When the ball travels a horizontal distance of 12 meters, it has dropped 55cm from its original height when it left the racquet. What is the initial speed of the

    asked by jack on September 13, 2015
  59. math

    r the thrust of aiplane's engine produces a speed of 350 mph in still air . the plane is aimed in the direction of but its velocity with respect to the ground is mph .find the wind velocity .explain whether this is a tail wind or head wind .

    asked by djo on February 12, 2015
  60. Physics

    In a front-end collision, a 1400 kg car that has shock-absorbing bumpers can only withstand a maximum force of 75 kN before any sort of damage occurs.If the maximum speed for a car that is nondamaged in a collision is 10 Km/h, by how much must the bumper

    asked by Harold on January 29, 2009
  61. physics

    Dolphins ca detect small fish whose size is about equal to the wavelength of the sound the dolphin makes with its echo-location system. A dolphin emits a chirp at a frequency of 220 kHz. Using the speed of water as 1530 m/s, what is the smallest fish this

    asked by hilary on January 15, 2010
  62. Calc.

    An air ambulance is travelling from Barrie to Toronto. Toronto is located 90 km [S5°E] of Barrie. If the wind is blowing from the South with a velocity of 62 km/h, and the plane’s air speed is 375 km/h, what direction must the pilot fly to make it to

    asked by Derek on July 6, 2008
  63. Physics

    A children merry go round in the consist of 300 kg solid horizontal disk of radius 8.5 m. It rotates at a speed of .25 revolution per second while a person of mass 150 km takes a ride at the edge of the disk. How fast will the disk be rotating if the

    asked by Tsunayoshi on December 14, 2013
  64. Physics please help!!

    A stone is aimed at a cliff of height h with an initial speed of v = 64.0 m/s directed 55.0° above the horizontal, as shown in the Figure below by the arrow. The stone strikes at A, 7.31 s after launching. What is the height of the cliff? What is the

    asked by Julia on February 5, 2013
  65. College Physics 1

    A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.17 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25° when they move past the

    asked by Autianna on September 20, 2013
  66. Physics

    Consider a 52-cm-long lawn mower blade rotating about its center at 3390 rpm. (a) Calculate the linear speed of the tip of the blade. (b) If safety regulations require that the blade be stoppable within 3.0 s, what minimum angular acceleration will

    asked by Jessie on June 14, 2012
  67. physics

    In an arcade game a 0.144 kg disk is shot across a frictionless horizontal surface by com- pressing it against a spring and releasing it. If the spring has a spring constant of 164 N/m and is compressed from its equi- librium position by 7 cm, find the

    asked by Anonymous on February 10, 2013
  68. 12

    a high speed office copier has an initial price of $1800. a service contract cost $270 for the first year and increases by $100 per year thereafter. it can be shown that over x years the total cost of thecopier is given by C(x)=1800+220x+50X^2 When is the

    asked by Ak on November 3, 2009
  69. Physics

    A meter-long stick is balanced vertically on the ground. It is then made to fall with a gentle nudge. What is the speed of the end of the stick as it hits the floor? Assume the end on the floor does not slip. Treat the stick as a “thin rod.” Really

    asked by Yoyo on August 7, 2015
  70. physics

    The captain of a plane wishes to proceed due west. The cruising speed of the plane is 226 m/s relative to the air. A weather report indicates that a 32.0-m/s wind is blowing from the south to the north. In what direction, measured with respect to due west,

    asked by Anonymous on September 10, 2014
  71. physics

    a 20 kg crate is initially moving down a wall at a speed of 2.0 m/s. Determine the magnitude of the average force exerted by the person in order to stop the crate's downward motion in a distance of .50 m. The person pushes in a direction 53 degrees above

    asked by brit on January 8, 2012
  72. Physics

    A small steel sphere of mass 0.40 kg is attached by a 0.50 m long cord to a swivel pin set into the surface of a frictionless table top. The sphere moves in a circle on the horizontal surface with a speed of 6.0 m/s. a.) what is the magnitude of the

    asked by Alex on April 12, 2013
  73. Chemistry

    How much energy is emitted in each α decay of plutonium-234? (234Pu, 234.0433mu; 230U, 230.0339mu; 4He = 4.0026 mu). I tried finding the difference in mass first: (230.0339 + 4.0026) - (234.0433) = -.0068 mu I then converted from amu to kg by multiplying

    asked by Trixie on April 13, 2010
  74. Physics

    a blood centrifuge starts from rest and attains a rotational speed of 3400 rpm after 50 seconds. 1) determine average angular acceleration of the centrifgue 2) a 3ml blood sample is contained in a test tube at distance 37.5mm from the centreline. Calculate

    asked by Presh on April 7, 2015
  75. Physics(check my answer please!!)

    Hello, could you guys let me know if this looks right? Thanks in advance. A ball is fired at a speed of 8 m/s at 20 degrees above the horizontal from the top of a 5m high wall. a) what is the total velocity at the maximum height? b) how far from the

    asked by Timothy on October 3, 2016
  76. physics

    A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 32.0 m above sea level, directed at an angle theta = 47.3° above the horizontal, and with a speed v = 35.5 m/s. Assuming

    asked by danniel on December 3, 2015
  77. phsics

    A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 32.0 m above sea level, directed at an angle theta = 49.3° above the horizontal, and with a speed v = 25.8 m/s. Assuming

    asked by Anonymous on September 22, 2010
  78. math

    A car skids to a stop, leaving four skid marks with an average length (D) of 60 feet. The road is asphalt. Skid tests reveal a drag factor(f) of 0.75. Since all four wheels were braking, the braking efficiency (n) is 100% or 1.00. To the nearest mile per

    asked by Matthew on October 2, 2018
  79. physics

    A large storage tank, open to the atmosphere at the top and filled with water, develops a small hole in its side at a point 18 m below the water level. The rate of flow of water from the leak is 1.6 × 10−3 m3 /min. Determine the speed at which the

    asked by Anonymous on April 26, 2013
  80. physics

    A bomber flies horizontally with a speed of 367 m/s relative to the ground. The altitude of the bomber is 4020 m and the terrain is level. Neglect the effects of air resistance. The acceleration of gravity is 9.8 m/s2 . a) How far from the point vertically

    asked by Anonymous on October 22, 2011
  81. physics

    A projectile of mass 0.550 kg is shot straight up with an initial speed of 22.0 m/s. (a) How high would it go if there were no air friction? I get 24.7m for this. (b)If the projectile rises to a maximum height of only 13.6 m, determine the magnitude of the

    asked by Kelsey on November 3, 2011
  82. physics

    A shell is fired from a gun with a muzzle velocity of 466m/s at an angle of 57.4 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is

    asked by Kelly on October 10, 2011
  83. physics

    A record player is spinning at 32 rpm when the motor is switched off. After 6.8 seconds the angular speed has decreased to 20 rpm. Calculate the frictional torque if the record player can be treated as a solid wheel of mass 2.4 kg and radius 15 cm. A)

    asked by emily on November 28, 2010
  84. Physics

    A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 35.0 m above sea level, directed at an angle theta = 46.3° above the horizontal, and with a speed v = 35.8 m/s. Assuming

    asked by Anonymous on December 2, 2015
  85. physics

    A metal rod is moving in uniform magnetic field of 2T with a velocity perpendicular to the direction of the field as shown on the diagram. If the speed of the rod is 5m/s and the distance between points A and B is 0.1 meters what is the potential

    asked by Maria on March 31, 2018
  86. Physics

    A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 32.0 m above sea level, directed at an angle theta = 46.9° above the horizontal, and with a speed v = 29.6 m/s. Assuming

    asked by Kevin on December 1, 2015
  87. math

    jason leaves detroit at 2 pm at a constant speed. he passes ann arbor, 40 mi. from detroit, at 2:50 pm. express the distance traveled in terms of time elapsed. i know d=rt. t=50 min. d=40 mi. does that mean the r= 4/5 mi/min. ? but how would u get the

    asked by hawkstar on September 28, 2006
  88. physics

    bull's-eye bob at a hunting range fires his rifle at a target 200 meters downrange. the bullet moves horizontally from the rifle barrel with a speed of 400 m/s? how far does the bullet drop from a straight line horizontal path bny the time it reaches the

    asked by Anonymous on April 29, 2015
  89. Physics

    When Babe Ruth hit a homer over the 10m -high right-field fence 110m from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.0m above the ground and its path initially made a 32∘ angle with the

    asked by Misty on September 11, 2014
  90. Physics

    Please explain to me how to do this question!!!!!!! A beam consists of singly ionised neon-20 atoms all travelling at the same speed, 3*10^5 m/s, through a vacuum. As the beam passes through the magnetic field it follows a circular path of radius 0.125m.

    asked by Sam on April 24, 2014
  91. physics

    A proton initially moves left to right long the x‑axis at a speed of 2 ´ 103 m/s. It moves into an electric field, which points in the negative x direction, and travels a distance of 0.2 m before coming to rest. What acceleration magnitude does the

    asked by jolanta on July 25, 2010
  92. Algebra

    During a hurricane evacuation from the east coast of Georgia, a family traveled 260 miles west. For part of the trip, they averaged 70 mph, but as the congestion got bad, they had to slow to 20 mph. If the total time of travel was 9 hours, how many miles

    asked by Leslie on October 9, 2011
  93. Physics

    A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 35.0 m above sea level, directed at an angle theta = 45.9° above the horizontal, and with a speed v = 32.3 m/s. Assuming

    asked by Anonymous on February 8, 2013
  94. physics

    Bumpers on cars are not of much use in a collision. To see why, calculate the average force a bumper would have to exert if it brought a 1200 kg car (a so-called "compact" model) to a rest in 15 cm when the car had an initial speed of 2 m/s (about 4.5

    asked by brad on April 14, 2010
  95. Physics

    Jeff discovered an old water well in his backyard. He decided to measure its depth. He happened to have an audio oscillator of adjustable frequency. He sends sound waves down to the well and adjusts the frequency until he finally hears two successive

    asked by Jemmy on May 27, 2009
  96. physics

    A 301 kilogram piano is being lifted at a steady speed from ground level straight upward to an apartment 10.0 meters above the ground. The crane that is doing the lifting produces a steady power of 415 watts. How long does it take to lift the piano? I

    asked by Lupita on November 7, 2013
  97. Phys

    You are designing a curve in a highway. If the turn is too sharp (the radius of curvature is too small), then cars may lose traction. Find the minimum radius of curvature of a road so that a 1000kg car doesn't skid. The speed limit is 15m/s and the static

    asked by Annabelle on June 29, 2016
  98. physics

    A bomber flies horizontally with a speed of 225 m/s relative to the ground. The altitude of the bomber is 3010 m and the terrain is level. Neglect the effects of air resistance. The acceleration of gravity is 9.8 m/s2 . a) How far from the point vertically

    asked by Sonia on October 25, 2012
  99. Physics

    a ball is released from the top of a 67.0 m high building. At the same instant a second ball is shot straight up from the ground with an initial speed of 20.0 m/s, directly below the point where the first ball was dropped. Ignore air drag and calculate a.

    asked by Chris on August 13, 2018
  100. physics

    A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m .. if needs values of these ( the speed of the wave is

    asked by maria on October 25, 2011

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