1. physics

    Hans uses a wheelchair. Although he has a rampto in his house, he finds it difficult to get his wheelchair up the ramp. Whcih modification would make it easier for Hans to get in his house? a. increase the length of the ramp b. increase the friction
  2. PHYSICS

    Hans uses a wheelchair. Although he has a rampto in his house, he finds it difficult to get his wheelchair up the ramp. Whcih modification would make it easier for Hans to get in his house? a. increase the length of the ramp b. increase the friction
  3. Geometry

    A model is made of a car. The care is 5 feet long and the model is 8 inches long. What is the ratio of the length of the car to the length of the model? 8:5 15:2 2:15 5:8 My answer is 2:15
  4. statistics

    From Lab 3, Problem 2 2. The data set magnet is from an experiment to see the effect of voltage and number of turns on the magnetic force of an electromagnet. The experimenters expected to see a limit to which the number of turns could increase the force.
  5. Physics 124

    A projectile is fired from the top of a cliff at 14.2 m/s at an angle of 36.9 degrees below the horizontal, and strikes water at the same level as the base of the cliff 3.51 seconds later. (Assume g=10.0 m/s2.) How high was the top of the cliff above the
  6. Physics

    A drowsy cat spots a flowerpot that saild first up and then down past an open window. The pot was in view for a total of .43 s, and then top-to-bottom height of the window is 2m. How high above the window top did the flowerpot go?
  7. physics

    If the coefficient of static friction is 0.350, and the same ladder makes a 64.0° angle with respect to the horizontal, how far along the length of the ladder can a 71.9-kg painter climb before the ladder begins to slip? The same ladder is 46.7 Newtons in
  8. physics please help!!

    One of the methods used to train astronauts for the effects of "zero gravity" in space is to put them in a specially equipped plane which has been stripped of seats and fitted with padded walls. The pilot then takes the plane up to an altitude of typically
  9. physics

    A 0.5 kg object is given an initial velocity of 3 m/s after which it slides a distance of 8 m across a level floor. What is the coefficient of kinetic friction between the object and the floor?
  10. Science

    A box being pushed with a force of 85N slides along the floor with a constant speed. What is the force of sliding friction on the box?
  11. Physics

    A trash can with a mass of 5 kg has a coefficient of static friction of μs = 0.80 and a coefficient of kinetic friction of μk = 0.22. (The Active Figure applies to a similar situation, but the values of the mass, coefficient of static friction
  12. Physics - forces acting at an angle

    The physics of tobogganing and forces at an angle: A child is tobogganing down a hillside. The child and the toboggan together have a mass of 50.0kg. The slope is at an angle of 30.0 degrees to the horizontal. Assume that the positive y-direction is
  13. physics

    A crate with a mass of 50 kg has a coefficient of static friction with the floor of 0.8 and a coefficient of kinetic friction of 0.25. If it is pushed with a force of 425 N, how long will it take to move it across a 65 meter horizontal floor?
  14. Physics

    A crate with a mass of 50 kg has a coefficient of static friction with the floor of 0.8 and a coefficient of kinetic friction of 0.25. If it is pushed with a force of 425 N, how long will it take to move it across a 65 meter horizontal floor?
  15. PHYSICS

    A tuning fork of frequency 558 Hz is placed near the top of the pipe shown in the Figure. The water level is lowered so that the length L slowly increases from an initial value of 20.0 cm. Determine the next two values of L that correspond to resonant
  16. Physics

    A solid cylinder of radius 0.85m is released from rest from a height of 1.8m and rolls down the incline as shown. What is the linear speed of the cylinder when it reaches the horizontal surface?
  17. physics

    A solid cylinder of radius 0.85m is released from rest from a height of 1.8m and rolls down the incline as shown. What is the linear speed of the cylinder when it reaches the horizontal surface?
  18. geometry

    ok,judy lies on the ground 45 feet from her tent. both the top of the tent and the top of the cliffare in her line of sight. her tent is 10 feet tall. about how high is the cliff
  19. physics

    A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.30 and the push imparts an initial speed of 4.0 <units>m/s</units>?
  20. physics

    a box with a mass of 10 kg slides on a surface at 30m/s the coeffiecent of kinetic friction between the box and the surface is 0.5 what is the amount of frictional force
  21. physics

    A 75 kg box slides down a 25o ramp with an acceleration of 3.6 m/s2. Find the coefficient of kinetic friction between the box and the ramp.
  22. Physics

    When an object slides over a smooth horizontal surface, how does the force of friction depend on the force of gravity on the object?
  23. types of businesss writing

    My third piece. Draft an email of at least four complete sentences to Deb Walker, the designated trainer: A. Confirm the arrangements for the seminar providing only the information she needs to arrive at the right place at the right time. B. copy both Mr.
  24. Mechanics

    What is the decrease in elevation of a 4-kg body whose kinetic energy increases from 20 J to 100 J as a result of moving downward along an inclined plane? set Potential energy change equal to KE change mgh= change in KE thanks a lot!
  25. physics

    A constant force of 900 N pushes a 100 kg mass up the inclined plane shown above at a uniform speed of 5 m/s. ( hight= 1m) The power developed by the 900 N force is most nearly: 400 W 800 W 900 W 1000 W 4500 W
  26. 3 grade english

    when you read you can somethimes make a general statement, or generalization,about inividual ideas in the text. a generalization tells how ideas are mostly alike or all alike. directions read the following passage. people of all ages can play basketball
  27. Math

    The length of the top of a work bench is 5 m greater than the width. The area is 66 m^2. Find the length and the width.
  28. Math - Polygons and Quadrilaterals

    A rectangle has a diagonal of length 125. If the ratio fo the length of the short side to the length of the long side of the rectangle is 7:24, what is the length of the shorter side of the rectangle?
  29. Science

    I need help. I need to define friction. I know what it is but cant figure out how to put them in words with out being to long written. Then I have two more ?s What are the three types of friction? What is the speed of acceleration due to the force of
  30. Physics

    A 10 kg bowling ball sits at the top of a 10 m hill and then slides down its icy hillside. a. What is the speed of the bowling ball when it reaches the bottom of the hill? b. What is the change in kinetic energy of the system as the bowling ball travels
  31. physics

    A 22-N force, parallel to the incline, is required to push a certain crate at a velocity of 6.1 up a frictionless incline that is 55° above the horizontal. The mass of the crate is:
  32. physics

    A 36-N force, parallel to the incline, is required to push a certain crate at a velocity of 9.1 up a frictionless incline that is 45° above the horizontal. The mass of the crate is:
  33. physics

    If a boulder of 9.7 tons is placed on a 70 degree incline, how much extra force would be needed to push the boulder up if the incline increases up by 5 degrees?
  34. physics

    I recently did an experiment where I measured pressure at a few heights. The question I cam having trouble with is how to find the density of the air between the top and bottom. The difference in pressure from the top to bottom is 52.6 torr (692.5 to
  35. Physics

    I push a stack of six books (each weighting 4 kg) horizontally across a table to the right with a kinetic coefficient of friction uk = 0.5. I apply a force of 120 N. a) What is the acceleration of the books? b) what is the force of the rightmost book on
  36. Physics

    A box is sitting at rest at the top of a ramp 3.00m long at an angle to the horizontal of 12 degrees. When the box reaches the bottom of the frictionless ramp, it falls an additional 2.00 m vertically before hitting the floor. How far from the right end of
  37. Physics

    So you chose to use a solid sphere and you give it a speed of 5.9m/s on a flat horizontal surface which is the speed it has when it reaches a 22degree incline. A) How far along the incline will it go?
  38. Physics

    A uniform solid sphere rolls down an incline. (a) What must be the incline angle if the linear acceleration of the center of the sphere is to have a magnitude of 0.50g?
  39. physics

    A 4.5 kg bag of groceries is in equilibrium on an incline of angle θ = 55°. Find the normal force of the incline on the bag.
  40. Geometry

    Jason designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric circles are each 1.25 m long. Find the total length of wrought iron used to make the structure. Round the answer to the nearest meter.
  41. Physics

    a soccer ball is kicked from the top of a 50ft high hill with an initial velocity of 25ft/s at angle 30 degrees below horizontal. At what velocity will it strike the ground? b. How long would it take the ball to reach the ground c. What is the range that
  42. Math

    Given the plane 2x-3y+7z=4, find the equation for the line perpendicular to the plane that intersects the plane at the point (6,5,1).
  43. Math

    A plane has a height of 1000 m. You see the plane at an angle of 40 degrees with the ground . How far away is the plane from where you are standing.
  44. Math

    A plane has a height of 1000 m You see the plane at an angle of 40 degrees with the ground . How far away is the plane from where you are standing. Thank you
  45. Physics

    Suppose a rocket ship in deep space moves with constant acceleration equal to 9.80 m/s2, which gives the illusion of normal gravity during the flight. (a) If it starts from rest, how long will it take to acquire a speed 12% that of light, which travels at
  46. Math

    A rectangular writing pd is 5/6ft long by 1/2ft wide. A border is to be added round all sides of the writing pad. Use the formula P=2L + 2W to determine the length of the border.
  47. Math

    The height of a pop can is 15 cm and its shadow is 20 cm long. A carton of milk next to the can is 0.25 m tall. Determine the length of the carton's shadow, to one tenth of a centimeter. I did 100cm*0.25... but the answer is 33.3cm How did they get that?
  48. physics

    Hello everyone, I need help with this question: A dart gun is fired while being held horizontally at a height of 1.00m above ground level and while it is at rest relative to the ground. The dart from the gun travels a horizontal distance of 5.00m. A
  49. physics

    A skier slides down a ski slope with an acceleration 2.2 m/s^2 directed down the slope. The coefficient of kinetic friction between the skis and the slope is 0.24. What is the angle of the slope with the ground?
  50. phyisics

    A 0.5kg object is given an initial velocityof 3m/s after when it slides a distance of 8m across a level floor whatis the coefficient of kinetic friction between the object and the floor
  51. Physics

    A crate slides down a ramp at angle 48 degree to horizontal. The coefficient of limiting friction is 0.48. Find the options for the acceleration of the crate down the ramp.
  52. Physics

    A baseball player stealing second base runs at 7.2 m/s . If he slides the last 3.8 m , slowing to a stop at the base, what's the coefficient of kinetic friction between player and ground?
  53. 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
  54. farmington

    Howard the soda jerk at Bea's diner slides a 0.60-kg root beer from the end of the counter to a thr=irst customer. A force of friction of 1.2 N brings the drink to a stop right in front of the customer.
  55. Pre- Calculus

    An antenna is located at the top of a building 1000 ft tall. From a point on the same horizontal plane as the base of the building, the angles of elevation from the top and the bottom of the antenna are 65.8 degrees and 62.6 degrees respectively. How tall
  56. trgonometry

    a tower and a monumement stand on a level plane. The angles of depression of the top and bottom of monument as viewed from the top of the tower are 13 degree and 31 degree respectively. If the height of the tower is 145 ft.,find the height of the monument
  57. physics -plz help

    1) A car is moving at 100 km/hr. Its mass is 950 kg. Find its KE. 2) What force is needed to accelerate a 1300-kg car from rest to 20 m/s in 80 m? 3) A 1200-kg car going 30 m/s skids to rest. The friction force is 6000 N. How far does it skid?
  58. physics

    "A solid cylinder and a thin-walled hollow cylinder have the same mass and radius. They are rolling horizontally along the ground toward the bottom of an incline. They center of mass of each cylinder has the same translational speed. The cylinders roll up
  59. physics

    "A solid cylinder and a thin-walled hollow cylinder have the same mass and radius. They are rolling horizontally along the ground toward the bottom of an incline. They center of mass of each cylinder has the same translational speed. The cylinders roll up
  60. MATH

    Region A that on xy-plane is bounded by two (2) curves and a line. The curves are y=x^3-2x+3 and y=-x^2+3 while the line is x=0. It is located in the first quadrant of xy-plane. Determine the area of region A.
  61. Physics

    A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 0.8 m/s2 for 4.4 seconds. It then continues at a constant speed for 13.5 seconds, before getting tired and slowing
  62. AP Physics...ahaha

    A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot was in view for a total of .43 s, and the top-to-bottom height of the window is 2 m. How high aboe the window top did the flowerpot go?
  63. Physics

    A 30-kg child stands at one end of a floating 20-kg canoe that is 5.0-m long and initially at rest in the water. The child then slowly walks to the other end of the canoe. How far does the canoe move in the water, assuming water friction is negligible?
  64. Math

    From the top of a Cliff 90metre high, the angle of depression of a boat on the sea is 26.2 degree.calculate how far the boat is from the from the foot of the cliff and from the top of the cliff
  65. trigo

    from the top of 90 meters high building it is observe that the top of another building make a 40 degree angle depression. if two buildings 75 meters apart how tall is the other building?
  66. Physics

    At a velocity of 55m/s, the car slides off the track. What is the coefficient of friction between the car's tires and the track?
  67. Please Help, I Don't Know How To Do This

    Chef Potato's body has a cylinder in the middle and two half spheres that make up his bottom and head. He has the two dimensional shape measurements as follows: 20 cm in total length, 5 cm between the end of the cylinder and the top of the top sphere.
  68. mechanics

    A uniform solid sphere rolls down an incline. What must be the incline angle (deg) if the linear acceleration of the center of the sphere is to have a magnitude of 0.16g?
  69. math

    A vehicle having a mass of 1.5tonnes is standing on an incline of 18degree to the horizontal.Determine the components of its weight parallel and perpendicular to the road surface.
  70. physics

    a stick of linear density p=2kg/m rests on a disc of radius=1m. the stick makes an angle of 60° with horizontal and is tangent to the disc at its upper end .Friction exists at all points of contact ,and assume that it is large enough to keep the system at
  71. Essay Writing

    I need help with parallel structure. My essay is contrasting cats and dogs, with cats being the superior (sorry dog lovers). One paragraph is to be block method the other is to be point by point. II. Body A. Needs 1. Feeding a. Cats b. Dogs 2. Training a.
  72. English

    1. I am a freshman in high school. 2. I am a freshman of high school. (Which preposition should we use? Are both OK?) 3. There'll be a parade on the anniversary day. (How do you pronounce "There'll"?) 4. We'll choose between upper secondary school and
  73. Physic

    A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 1.5 m/s^2 for 4.1 seconds. It then continues at a constant speed for 11.9 seconds, before getting tired and
  74. math answers??? correct me :/

    1. Rename 7/20 as a percent. A. 35% ⇐ ANS B. 14% C. 30% D. 28% 2. Rename 0.245 as a percent. A. 245% B. 24.5% ⇐ ANS C. 2.45% D. 25% 3. Rename 28% as a decimal ad fraction in its simplest form. A. 0.28 and 28/100 ⇐ ANS B. 0.2 and 2/100 C.
  75. Physics

    1. A ball is launched from a cliff with an initial velcity of 10 m/s at an angle of 40 degrees above horizontal. If the ball lands 24 m away, determine the height of the cliff. 2. if the mass A is 1 kg and the mass of B is 6.0 kg, determine the
  76. Math

    A plane flys 425 miles with the wind and 350 miles against the wind in the same length of time if the speed of the wind is 15 mph what is the speed of the plane
  77. Math

    Which of the following is true if a pentagon tessellates a plane? a. A pentagon never tessellates a plane b. All of its sides must be the same length c. It must be a regular pentagon d. It has one pair of parallel sides I was thinking its (c) but not sure.
  78. Physics

    your car has stalled and has come to rest on a level section of a busy street. you and a passenger decide to push the car to the side of the road so it will not interfere with the trafic. together you excert a combine horizontal force of 1320N. the
  79. physics

    an airplane is diving at a speed of 300 km/h and the angle betweent he plane's dive path and the vertical is 50 degrees. The plane launches a rocket which lands at 750m horizontally from beneath the launch point. a) find the flight time of the rocket and
  80. College Algebra

    it is a known fact that the snout of a florida crocodile is seen above water varies directly with its body length if you see a crocodiles snout above water that is 2 feet long the normal body length is 7 feet, therefore if you see a snout above water while
  81. physics

    The airplane can take off when its airspeed (speed of the air flowing over the wing) is equal to 65 knots. What is the length of runway required for the plane to take off if there is a 25 knots head wind? The runway at the Tallahassee Regional Airport has
  82. physics

    The airplane can take off when its airspeed (speed of the air flowing over the wing) is equal to 65 knots. What is the length of runway required for the plane to take off if there is a 21 knots head wind? The runway at the Tallahassee Regional Airport has
  83. Physics

    A car of mass 1550 kg is travelling at 75.0 km/h on a dry horizontal concrete surface when the driver applies the brakes licking the wheels. (a) How far does the car travel before coming to rest? (b) How long does it take the car to stop after the driver
  84. physics

    A grandfather clock uses a physical pendulum to keep time. The pendulum consists of a uniform thin rod of mass M = 7.01 kg and length L = 0.15 m that is pivoted freely about one end, with a solid sphere of the same mass, 7.01 kg, and a radius of L/2
  85. Physics

    A 2 kg pendulum bob is hanging from a 30 cm long piece of string. If the pendulum bob is allowed to move in circular motion in a horizontal plane, determine the tension in the string if the angle the string makes with the vertical is 37 degrees. Need Step
  86. Physics - pendulum negative work

    A 2.20 kg pendulum starts from a height of 5.00m. It swings back and forth through one whole oscillation but only returns to a maximum height of 4.75m. After a long time the pendulum eventually winds down and comes to a stop. How much total negative work
  87. Physics - pendulum negative work

    A 2.20 kg pendulum starts from a height of 5.00m. It swings back and forth through one whole oscillation but only returns to a maximum height of 4.75m. After a long time the pendulum eventually winds down and comes to a stop. How much total negative work
  88. physics

    A bead on a fixed ring and a spring A ring fixed to a support at the top is hanging vertically. A bead of mass m slides through the ring and is connected to the support through a spring of stiffness k as shown in the figure-1. The length of the unstretched
  89. physics 20

    DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
  90. physics

    A coin of mass 3 g slides horizontally on the surface of a table. The frictional force exerted on the penny is 0.0147 N. What is the coefficient of friction between the table and the penny?
  91. physics

    A coin of mass 3 g slides horizontally on the surface of a table. The frictional force exerted on the penny is 0.0147 N. What is the coefficient of friction between the table and the penny?
  92. physics20

    DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
  93. Physics 20

    DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
  94. physics

    DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
  95. Science

    What is the momentum of a 50 kg carton that slides at 2 m/s across an icy surface? The sliding carton skids onto a rough surface and stops in 3 s. Calculate the force of friction it encounters.
  96. physics

    A mass of 300 g is attached to a string that is 1.21 m in length. The mass is whirled in a horizontal circle on a surface and completes 7.00 rotations in a time of 2.71 s. The force of tension in the string is 92.7 N. Determine the force of friction
  97. Physics

    A converging thin lens made out of crown glass (n=1.52) has a focal length f=1.0m An identical lens (same radius for the spherical surfaces), made out of a high-index plastic with n=1.70 will be ... A. Converging with a focal length smaller than 1.0 m B.
  98. physics

    A long straight wire is oriented in the z direction and carries a current I. A square loop with sides of length w is in the xz-plane with its nearest edge a distance d from the wire. In time of t, the square loop moves a distance of l closer to the wire.
  99. Math (algerbra)

    Mary Thon starts at a point of 26 miles FROM school and runs TOWARD the school at a rate of 6 Miles per hour. (mph) Randy Miles starts FROM school 1.3 hours later and runs TOWARD MARY at a rate of 8 mph. x= number of hours that mary has been running
  100. Physics

    A plane is flying west at 214 km/h. The wind is blowing south at 108km/h. a what is the ground speed of the plane b In what direction does the plane travel