1. physics

    A cup of coffee is on a table in an airplane flying at a constant altitude and a constant velocity. The coefficient of static friction between the cup and the table is 0.100 . Suddenly, the plane accelerates forward, its altitude remaining constant. What
  2. Physics

    A cup of coffee is on a table in an airplane flying at a constant altitude and a constant velocity. The coefficient of static friction between the cup and the table is 0.410 . Suddenly, the plane accelerates forward, its altitude remaining constant. What
  3. physics

    A cup of coffee is on a table in an airplane flying at a constant altitude and a constant velocity. The coefficient of static friction between the cup and the table is 0.420 . Suddenly, the plane accelerates forward, its altitude remaining constant. What
  4. Physics

    This is a very confusing problem, I had never taken physics before and it is going to kill my GPA. can someone please help me solve this problem. I have a quiz coming up. Thanks for the help. The flywheel of an old steam engine is a solid homogeneous metal
  5. physics

    A cue ball (mass = 0.145 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick, which applies an impulse of +1.45 N · s to the ball. The ball then slides along the table and makes an elastic head-on collision with a
  6. physics

    A cue ball (mass = 0.140 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.60 N·s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second
  7. physics

    A cue ball (mass = 0.140 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.60 N·s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second
  8. Physics

    A cue ball (mass = 0.150 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.45 N·s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second
  9. Biology

    What is a molecular clock? A)a tool scientists use to date fossils B)a tool scientists use to determine how many mutations a species accumulates over time C)a tool scientists use to determine how long two species have been evolving independently D)a tool
  10. physics

    A 4.5 kg can of paint is sitting on top of a 0.8 meter high step ladder. How much work did you do to move the can of paint to the top of the ladder?
  11. math help

    An engineer is required to survey a nonrectangluar plot of land but is unable to measure side UT directly. The followng data are taken; RU=130 meters, RS=12m ST=90m, angle RST=115, and angle RUT=100. Calculate the length of side UT and the area of the
  12. Physics

    A place kicker must kick a football from a point 33.0 m (about 36 yd) from the goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 20.0 m/s at an angle of 48◦
  13. physics

    A place kicker must kick a football from a point 34.0 m (about 37 yd) from the goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 21.0 m/s at an angle of 56◦
  14. Physics

    You have a 2.4 m high platform that is level on top. A spring launcher is located on the top so that it launches objects horizontally. You want to launch a 0.70 kg ball so that it hits at target on the ground 6.0 m away from the base. If the spring
  15. Physics

    You have a 2.4 m high platform that is level on top. A spring launcher is located on the top so that it launches objects horizontally. You want to launch a 0.70 kg ball so that it hits at target on the ground 6.0 m away from the base. If the spring
  16. Math

    cheryl used 1 inch thick wood to build a planter for some flowers. the planter has 4 sides and a bottom but no top. the outside dimensions are 3 feet long, 6/12 inches wide, and 6/12 inches high. cheryl wants to know how much space the planter takes up.
  17. Math

    Sam starts from point A at 8:00am and hikes up a mountain path. He arrives at the top, (point B) at 4:00pm. He camps there for the night and the following morning he starts his descent at 9:00am. He travels faster since he goes downhill and arrives at the
  18. Physics

    A speeder traveling at a constant speed of 102 km/h races past a billboard. A patrol car pursues from rest with constant acceleration of (9 km/h)/s until it reaches its maximum speed of 146 km/h, which it maintains until it catches up with the speeder. How
  19. Math

    3 pieces of ribbon, each 85 cm long, are cut from a length of ribbon 3 m long. What is the length of the remaining piece of ribbon?
  20. College Math

    A plane flies 460 miles with the wind and 310 miles against the wind in the same length of time. If the speed of the wind is 30 mph, what is the speed of the plane in calm air?
  21. Math

    Me, again... Please help me. Thank you. Assume a plane is flying directly north at 200 mph, but there is a wind blowing west at 23 mph. Part I: Express both the velocity of the plane and the velocity of the wind as vectors, using proper notation to
  22. Physics

    A 40 kg child start from rest and travels 4 m down a slide that is inclined 35 degree to the horizontal. If her speed at the bottom is 2.5 m/s , what was the frictional force along the slide?
  23. physics

    If a toy plane is spinning on a string 1.87 meters off the ground and the string is .5m long how long does it take to make 10 revolutions?
  24. Algebra

    These are the three questions that I'm struggling with. Question 2 is a matter of terminology. Questions 1 and 3 are just difficult for me to decipher through and are causing me some confusion. (The initial set of directions apply to each question). 1.
  25. physics

    In preparation for shooting a ball in a pinball machine,a spring (K=675N/m) is compressed by 0.0690m relative to its unstrained length. The ball(m=0.600kg) is at rest against the spring at point A.When the spring is released, the ball slides (without
  26. physics

    A plane is found by radar to be flying 5.9 km above the ground. The angle of elevation from the radar to the plane is 78.6°. Ten seconds later, the plane is directly over the station. Find the speed of the plane, assuming that it is flying level.
  27. Math 11

    The Colebeck's are purchasing a cottage for $120 000. They have a down payment of $20 000 and borrow the rest at 4.8%/a compounded monthly. If their monthly payments are $750 determine how long it takes them to pay off the loan?
  28. Maths

    An ant tries to climb the water pipe 10m high,it climbs 2m up and slips back 1m down in every move. In how many moves will it reach the top of the 10m high pipe
  29. Physics

    A farm tractor tows a 3800-kg trailer up a 19 degrees incline with a steady speed of 3.0 m/s. What force does the tractor exert on the trailer? (Ignore friction.)
  30. Math

    Shirley is on a Ferris wheel which spins at the rate of 3.6 revolutions per minute. The wheel has a radius of 35 feet, and the center of the wheel is 51 feet above the ground. After the wheel starts moving, Shirley takes 12 seconds to reach the top of the
  31. Algebra

    A cat can jump the height of up to 5 times the length of it's tail.How high can a cat jump if it's tail is 13 inches long? Please write a multiplication or division equation
  32. algebra

    Can someone please help me??? A line from the top of a cliff to the ground passes just over the top of a pole 6.0 feet high and meets the ground at a point 7.0 feet from the base of the pole. If the point is 99 feet from the base of the cliff, how high is
  33. Calc

    cylindrical can is to be made from a rectangular piece of aluminum that is 25 inches long and 10inches high by rolling the metal horizontally. Determine the circumference of the cylinder, the radius of the cylinder, the height of the cylinder, and the
  34. trigonometry

    a 60 meter high building is erected vertically on a hillside. An electric post stands vertically on the hill. An observer at the top the building, find the angle of depressions of the top and the bottom of the electric post to be 30 degrees and 42 degrees
  35. Physics ~Work Kinetic Energy~

    1.)A ball (m 0.5 kg) starts from rest and has 300 J(joule) of work applied to it. a) what is the initial kinetic energy of the ball? b) what is the final kinetic of the ball? c) what is the final velocity of the ball? 2.)A boy is doing chin-up. If the boy
  36. physics

    A car starts from rest and accelerates for 8.7 s with an acceleration of 4.4 m/s 2 . How far does it travel? Answer in units of m.
  37. physics

    A car starts from rest and accelerates for 2.8 s with an acceleration of 2.1 m/s2. How far does it travel? Answer in units of m
  38. physical

    A car starts from rest its acceleration is 2m.s-2 in a straight line. What is it displacement after 10 seconds?
  39. physics

    A car starts from rest and accelerates for 6.7 s with an acceleration of 1.6 m/s2 . How far does it travel? Answer in units of m
  40. physics

    a train starts from rest ad at the end of 90° seconds has a speed of 10km/h. What is the acceleration?
  41. Physics

    A car starts from rest and accelerates for 3.9 s with an acceleration of 5 m/s2 . How far does it travel? Answer in units of m
  42. physics

    An airplane starts from rest and accelerates at 11.5m/s^2. What is its speed at the end of a 655m runway?
  43. Physics

    A 2000 kg starts from rest and gains a velocity of 20 m/s in 5 s. What force wad applied on it?
  44. physics

    a car starts from rest and accelerates uniformly at 2m/s for 10second. what is its velocity at the end of 10 second?
  45. physics

    A car starts from rest and accelerates for 6.5 s with an acceleration of 3.6 m/s2. How far does it travel? Answer in units of m
  46. Physics

    A bike starts from rest and accelerates to 20 m/s over a period of 6 seconds. What is the acceleration of the car?
  47. Physic

    A cheetah can accelerate at a rate of 8.0 M/S^2. Assuming it starts from rest, what will its velocity be after 3.5 SECONDS?
  48. physics

    A car starts from rest and accelerates for 6.1 s with an acceleration of 3.1 m/s2. How far does it travel? Answer in units of m.
  49. PHYSIC

    A CHEETAH CAN ACCELERATE AT A RATE OF 8.0 M/S^2. ASSUMING IT STARTS FROM REST, WHAT WILL ITS VELOCITY BY AFTER 3.5 SECONDS?
  50. Physics

    A uniform rod of weight 300N and 2m long is hinged to the floor at one end so that it can rotate in the vertical plane. The other end of the rod is tied to a point on the ceiling vertically above the floor hinge by means of a rope 2.5m long. The vertical
  51. physcis

    1) A student jumps 0.85 meters straight up, on level ground. (a) How long is the student in the air? (b) For how long is the student within 0.10 meters of the top of the jump? (c) What fraction of the time is the student in the top 0.10 meters of the jump?
  52. Physics

    1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as fast around the circle)? a) force doubles b) force quadruples c) force is halved d) force is quartered my answer: c 2. Which is
  53. math trig

    A TOWER AND A MONUMENT STAND ON A LEVEL PLANE.THE ANGLES OF DEPRESSION OF THE TOP AND BOTTOM OF THE MONUMENT VIEWED FROM THE TOP OF THE TOWER ARE 13DEGREE AND 31 DEGREE,RESPECTIVELY;THE HEIGHT OF THE TOWER IS 145 FT. FIND THE HEIGHT OF THE MONUMENT.
  54. physics

    A 0.395-kg blue bead slides on a frictionless, curved wire, starting from rest at point in the figure below, where h = 1.50 m. At point , the blue bead collides elastically with a 0.650-kg green bead at rest. Find the maximum height the green bead rises as
  55. PHysics

    A 250 kg load is lifted 23 m vertically with an acceleration a = 0.185g by a single cable Determine the tension of the cable. =2900N Determine the net work done on the load. =? Determine the work done by the cable on the load. =66700 J Determine the work
  56. Chemistry

    I have a certain concentration of NaCl (in mg/L). I have to convert it to ppm Na+. I read some of the previous posts, and I understand that if I don't know the density, I should assume that 1ppm = 1mg/L. Does this also apply to ppm Na+ since there is 1 Na+
  57. math

    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.
  58. English (poetry)

    IV His soul stretched tight across the skies That fade behind a city block, Or trampled by insistent feet At four and five and six o’clock; And short square fingers stuffing pipes, And evening newspapers, and eyes Assured of certain certainties, The
  59. physic

    A particle is pushed horizontally by a constant horizontal force of magnitude F, which starts from the rest at x=0 in the positive ݔ direction. During the movement, it is also acted by the air resistance force that equivalent to bv, where b is the
  60. physics

    Two long, straight, parallel wires 10 cm apart carry currents in opposite directions. (a) Use the right-hand source and force rules to determine whether the forces on the wires are (1) attractive or (2) repulsive. Show your reasoning. (b) If the wires
  61. 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
  62. math

    ms.smith has a new fish aquarium that measures 45.3 cm long, 23.4 cm wide and 28 cm high. She has had a problem with the fish jumping out of the tank. today she is cleaning and decides to fill the tank to a level that is 4cm from the top to see if that
  63. math

    the windshield on an automobile is inclined 42.5 degrees with respect to the horizontal. assuming that the windshield is flat and rectangular, what is its area if it is 1.50m wide and the bottom is 0.48m in front of the top?
  64. Physics

    A 23 kg child goes down a straight slide inclined 38 degrees above horizontal. The child is acted on by his weight, the normal force from the slide, and kinetic friction.
  65. Physics

    ok I'll be using a home work problem to ask the question. I'm not asking for help on the question I got the correct answer just need to understand this concept better. Calculate the acceelration due to gravity on the Moon. The moon's radius is about 1.74 E
  66. Physics

    A car starts from rest and travels along a circular track with a radius of 55.0 meters. The car starts out at a position due East of the center of the track, heading due North initially around the track, which is counterclockwise. The car increases its
  67. physics

    A car starts from rest and travels along a circular track with a radius of 55.0 meters. The car starts out at a position due East of the center of the track, heading due North initially around the track, which is counterclockwise. The car increases its
  68. Physics

    A commuter airplane starts from an airport and takes the route shown in the figure below. The plane first flies to city A, located 175 km away in a direction 30.0° north of east. Next, it flies for 150 km 20.0° west of north, to city B. Finally, the
  69. physics

    A 62.0-kg baseball player begins sliding 3.40 m from third base w/ speed of 4.35 m/s. If the player comes to rest at third base (a) how much work was done on the player by friction? (b) what was the coefficient of kinetic friction between the player and
  70. Physics

    A vehicle of mass 1200 kg accelerates uniformly from rest to a velocity of 15 m/s in 5 seconds. It continues at this velocity for 15 seconds before decelerating uniformly at a rate of 5m/s2 to rest. Determine the following: (i)The acceleration (ii)The time
  71. Right triangle (tri)

    ladder 13 feet long . if she set the base of the ladder on the level ground 5 feet from the side of a houes, how many feet above the ground will the top of the ladder be when it rest against the house?
  72. Right triangle (tri)

    ladder 13 feet long . if she set the base of the ladder on the level ground 5 feet from the side of a houes, how many feet above the ground will the top of the ladder be when it rest against the house?
  73. PHY 101

    A 0.425-kg blue bead slides on a frictionless, curved wire, starting from rest at point where h = 1.50 m. At point , the blue bead collides elastically with a 0.675-kg green bead at rest. Find the maximum height the green bead rises as it moves up the
  74. Chemistry

    Mount McKinley in Alaska is the tallest peak in North America with a summit at 20,320 ft, or 6194 m. It is also known as Denali, meaning "the high one" in the native Koyukon Athabaskan language. The average atmospheric pressure at the top of Denali is
  75. Science

    A man enters an elevator holding two boxes-one on top of the other. The top has a mass of 6.0 kg and the buttom box has a mass of 8.0 kg. The man sets the two boxes on a metric scale registers a value of 166N; this is the upward force upon the bottom box.
  76. Physics

    4.82 kJ work is done by a worker pulling a crate across the deck of a ship at a constant speed of 7.82 m/s by a 453 N force. The rope is being pulled at a 37.0 degree angle to the deck. a)How far was it pulled? b)What is the friction force? c)What is the
  77. Math

    How do i find the length of a projection of a vector A=3x+y+2z on the xy plane? and how do i find the unit vector in the xy plane that is perpendiculer to vector A?
  78. math

    Three points P, Q and R are on a level ground. Q is 240m from P on a bearing of 230°. R is 120m to the east of P. (a) Using a scale of 1cm to represent 40m, draw a diagram to show the positions of P, Q and R in the space provided below. (b) Determine :
  79. engineering

    . A platform with boat weighs 10,000 N. Four cables are attached to the platform as shown; the edges of the platform are always a horizontal distance of 2 m from the pulleys. As the platform rises smoothly and evenly, the length L of the cables decreases
  80. algebra

    Johnny starts his hike at his car site. He will take a break halfway between the car site and the campsite and then head on to the campsite. Use the diagram below to answer the questions. (a graph of a coordinate plane. the max number for x is 13 and max
  81. Physics

    A 285-kg load is lifted 22.0 m vertically with an acceleration a=0.170 g by a single cable. Determine the tension in the cable. (N) Determine the net work done on the load. (J) Determine the work done by the cable on the load. Determine the work done by
  82. Physics

    A horizontal force F is exerted on a 20-kg box to slide it up a 30 degrees incline. The friction force retarding the motion is 80 N.How large must F be if the acceleration of the moving box is to (a)zero and (b) 0.75m/s2?
  83. Math

    Hi! I need help with this question: Directions: Find the rest of the answers for the table and then find the estimate for it's limit. Problem: lim x→0 cos(3x-1)/3x Table: (top row) -0.1, -0,01, -0.001, 0.01, 0.1 (trying to find what the bottom would
  84. Physics

    A skater with an initial speed of 7.6 m/s is gliding across the ice. Air resistance is negligible. The coefficient of kinetic friction between the ice and the blades is 0.1. a) Find the acceleration caused by kinetic friction and b) how far will the skater
  85. Physics

    Which of the following contains the most mechanical energy? A 10 kg ball at the top of a hill 10 meters high A 5 kg ball rolling with a velocity of 12 m/s A 10 kg ball rolling with a velocity of 5 m/s A 5 kg ball at the top of a hill 10 meters high HELPS
  86. physics

    An arrow is shot vertically upward and then 2.15 s later passes the top of a tree 37.0 m high. How much longer will the arrow travel upward, and how high will it go?
  87. Physics

    At an accident scene on a level road, investigators measure a car's skid mark to be 68 m long. It was a rainy day and the coefficient of friction was estimated to be 0.40. Using the work-energy theorem determine the speed of the car when the driver slammed
  88. Philosophy

    1. Determine whether the following arguments are valid or invalid. If valid determine whether they are sound. Be sure to explain what validity is and how you determine whether an argument is valid or not. Explain your answers in as much detail as you can.
  89. math geometry

    Please help so hard. My problem... In the coordinate plane point C lies on line segment AB. The coordinates for MN are (2,4) and (16,12). If the ratio of the length of AC to the length of CB is 3:4, what is the x-coordinate of point C?
  90. math

    a line segment in a coordinate plane with a length of 76 units was rotated 60 deg about the origin and then translate 10 units to the left. what would be a resulting length of the segment after these transformation
  91. Physics

    A 2.11 cm high insect is 1.31 m from a 125 mm focal-length lens. Where is the image? Distance of the image is ? How high is it? What type is it?
  92. Physics

    A 2.11 cm high insect is 1.31 m from a -125 mm focal-length lens. Where is the image? Distance of the image is ? How high is it? What type is it?
  93. science- here is the worksheet someone help me

    Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to
  94. physics

    In the design of a supermarket, there are to be several ramps connecting different parts of the store. Customers will have to push grocery carts up the ramps. A grocery cart has a mass of 30kg. The coefficient of friction is .10. Assume that the shoppers
  95. physics

    A lighthouse standing on the top of a cliff is observed from two open boats (boats are not decked over) A and B in a vertical plane through the light house. The angle of elevation of the top of the lighthouse viewed from B is 16 degrees and the angles of
  96. MATH TRIGO-PLSSS ANSWER CLEARLY COZ IM VERY LOW IN

    A TOWER AND A MONUMENT STAND ON A LEVEL PLANE.THE ANGLES OF DEPRESSION OF THE TOP AND BOTTOM OF THE MONUMENT VIEWED FROM THE TOP OF THE TOWER ARE 13DEGREE AND 31 DEGREE,RESPECTIVELY;THE HEIGHT OF THE TOWER IS 145 FT. FIND THE HEIGHT OF THE MONUMENT.
  97. governmnent

    If a proposed amendment violates the Constitution, should the Supreme Court be able to block its ratification?" A. With only one exception, an amendment to the Constitution cannot, by definition, violate the Constitution. Think it through: assume for a
  98. physics

    A 1.0 kg object is given a push along a horizontal surface. If the velocity of the object when it is released is 0.50 m/s west, and the object slides 0.25m before coming to a stop, what is the magnitude of the force of friction?
  99. Calculus

    A water trough is 6 m long, and its cross-section has the shape of an isosceles trapezoid that is 20 cm wide at the bottom, 50 cm wide at the top and 40 cm high. If the trough is being filled with water at the rate of 0.2 cubic meters/min, how fast is the
  100. Math

    1) Matt traveled the first leg of his trip for 1350 miles on a large jet. He then traveled an additional 600 miles on a private plane to reach his destination. If the speed of the jet was three times the speed of the plane and the total time in the air was