physics please HELP !

74,851 results, page 69
  1. Physics

    You throw a plate off your roof with a speed of 10.0 m/s. 4.00 seconds later it hits the ground? How far? What equation do i use? Variables explain!
  2. physics

    A block of mass 25.5 kg is released on a ramp with an angle of 31.70 degrees. The coefficient of friction is 0.45. Find the acceleration.
  3. physics

    A small tiny nail may Pierce an inflated Tyre and remain there without pressure reduction.explain
  4. physics

    A man holds a child on shoulders while watching a football match. How much work has he done if the game last for 2 hours
  5. Physics

    How fast must a truck travel to stay beneath an airplane that is moving 139km/hr at an angle of 25° to the ground?
  6. Physics Honors

    A pitcher throws a fast ball horizontally at 42.1 m/s How far does it drop before crossing the plate, 18.3 meters away?
  7. Physics

    You throw a plate off your roof with a speed of 10.0 m/s. 4.00 seconds later it hits the ground? How far? What equation do i use? Variables explain!
  8. physics-intro

    How much work is done in lifting 450 lb of cement 75 ft above the ground? So basically its W=fs (450lb)(75ft)=33750lb
  9. Physics

    A block weighing 9.7 N requires a force of 2.6 N to push it along at constant velocity. What is the coefficient of friction for the surface?
  10. Physics

    Why do some cooks put ice in the pot to cook meat? Explain then prove your answer by solution?
  11. physics

    What minimum speed does a 150g puck need to make it to the top of a 3.6m -long, 23 degree frictionless ramp?
  12. PHYSICS

    --------------A /l\ / 1 \ / 1 \ / 1 \ 1 B C the pendulum has a string of .075m. velocity at c is 3.83m/s how do i find the speed at point b when the angle of B and C is 37 degree
  13. physics

    A 4.00kg kg bucket of water is accelerated upward by a cord of negligible mass whose breaking strength is 73.0N N .
  14. college physics

    A delivery truck travels 10 km north, 18 km east, and 29 km south. What is its final displacement (in km) from the origin?
  15. Physics

    Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
  16. Physics

    Draw a FBD of an object that has forces acting on it that are not at right angles. If someone can provide me of some sort of example of what situation could represent this i would appreciate it.
  17. physics

    a car of mass 800kg attains a speed of 25m/s in a second.calculate the power developed in the engine
  18. physics

    Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
  19. physics

    Write down a half-reaction that explains the change that occurs on the surface of the copper spoon during electrolysis.
  20. Physics

    A grenade is thrown up into the air with an initial velocity of 27 m/s. How long does it take to return to the thrower's hand? I got 5.4 s, but I am very unsure.
  21. physics

    A grenade thrown straight up in the air has an initial speed of 27 m/s. How long will it take before it returns to the thrower's hand?
  22. Physics

    How much work is needed to move a -8.00 uC charge from the ground to a point whose potential is +75.0V ? I know -8.00 uc = -0.8 x 10^-6 then I used W = Fd but I can't seems to get right answer any hint is appreciated.
  23. physics

    calculate the free electrons of a copper wire having a 0.064 inches diameter and 1000 ft. long?
  24. physics

    when temperature increases from t to # t and the moment of inertia is increase from I to #I. the coefficent of linear expansion is alpha .THE RATIO OF #I\I IS
  25. *physics*

    what is the smallest time in which a 9.00kW motor can lift a 3500 kg elevator to a height of 9.50m? use 10m/s^2 as g.
  26. Physics

    Why do some cooks put ice in the pot to cook meat? Explain then prove your answer by solution.
  27. physics

    The path of a projectile fired at a 30 degree angle to the horizontal is best described as 1.parabolic 2.linear 3.circular 4.hyperbolic
  28. Physics (Online w/ no teacher)

    Find the change in the force of gravity between two planets when the distance between them is decreased by a factor of 5.
  29. Physics

    A golf ball is chipped at an angle of 49 degrees and with a speed of 8.5 m/s. How far does it travel to the nearest tenth of a meter?
  30. physics

    please help The power rating of an electric motor which draws a current of 5 amperes from a 240-volt line is? a. 12.0 kW b. 1.2 kW c. 48.0 kW d. 4.8 kW
  31. physics

    How long will it take an 850 kg car with 40 hp (horsepower) to reach the speed of 15 m/2, neglecting friction? 40 hp=29840 watts I know P=W/t but what is W?
  32. physics

    In a traction setup for a broken bone, with pulleys and rope available, how might we be able to increase the force along the femur using the same weight?
  33. physics

    is there a site where i can see if my calculations ofmeasurements or resistors is correct. or where i can see other problems that deal with the tesing or reistors and there results
  34. physics

    a body projected with velocity 30m/s an angle 30¡ã with horizontal maximum height attained by he object is.........?
  35. physics

    A ball initially at rest rolls down a hill with an acceleration of 4.5 m/s2. If it accelerates for 7.9 s, how far will it move? Answer in units of m
  36. physics

    If there were no air drag, how fast would drops fall from a cloud 2.4 kilometer above the Earth's surface? Answer in m/s.
  37. physics

    if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?
  38. physics

    if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?
  39. physics

    if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?
  40. physics

    The distance between the midpoints of two metal balls,P and Q,respectively of masses 55 kg and 70 kg,is 80 cm (a)calculate the gravitational force that P exerts on Q thanks in advance
  41. Physics

    Which method of sliding a block of ice requires less force—(a) pushing or (b) pulling at the same angle above the horizontal?
  42. physics

    find the total mechanical energy of a mass-spring system with m=1.24 kg and maximum speed 0.670 m/s
  43. physics

    A car traveling at 6.5m/s accelerates 3.6m/s2 to reach a speed of 16.0 m/s. How long does it take for this acceleration to occur? Answer in units of s
  44. physics 30

    Draw a scenerio with a magnet and the solenoid below that would induce a flow of electrons to the right of the page in the ammeter, as shown below.
  45. physics hw

    Determine the stopping distances for a car with an initial speed of 87 km/h and human reaction time of 2.0 s for the following accelerations. (a) a = -4.0 m/s2 (b) a = -8.0 m/s2
  46. Physics

    A pan filled with hot food cools from 94°C to 86°C in 2minutes when the room temperaturs is at 20°C .How long will it take to cool from 71°C to 69°C ?
  47. physics

    the substance which allows heat radiations to pass through is.a)iron b)water vapour c)wood d)dry air
  48. Physics

    In terms of Ohms Law (V=IR), when plotting a graph of V against I, is it safe to say that the line passes through the origin, even though 0/0 does not exist?
  49. Physics

    How much time would Simpson save by in- creasing his average velocity to 65.8 km/h to the east? Answer in units of min
  50. Physics

    Steam of mass 11.0 g at 100°C is added to 114.8 g of ice at 0.00°C. Find the final temperature of the system.
  51. physics

    calculate the maximum working current of an appliance rated at 2.4kw with an operating voltage of 240v
  52. physics 100

    What minimum speed does a 160 puck need to make it to the top of a 5.4 -long, 24 frictionless ramp?
  53. college physics

    Let's say that you find a slope of 6.671×10-14 for square plates of width 11.5 cm. What do you get for the value of the permittivity of free space?
  54. physics

    calculate the maximum working current of an appliance rated at 2.4kw with an operating voltage of 240v
  55. maths, geography, physics, chemistry

    A cuboid has TSA 40 sq. m and latral surface 26 sq. m. Find the base area.
  56. physics

    A 25HP electric motor turning a 1800 RPM will produce how many foot pounds of torque?
  57. physics

    How long does it take a plane, traveling at a constant speed of 160 m/s, to fly once around a circle whose radius is 3450 m?
  58. physics

    true of false- if you only want a small volume of hot water, you should place the immersion heater near the bottom?
  59. hi

    Find the book's acceleration (positive for up, negative for down). .... physics An object with mass m = 20 kg is released from a height h = 60 m above the ground.
  60. Physics

    What is the magnitude of the momentum of the 0.057-kg tennis ball when it travels at a speed of 29 m/s? Earth is the frame of reference.
  61. physics

    A stationary pool ball with mass 0.20 kg is struck with an average force of 35 N over a time of 18 ms. What speed does it have just after impact?
  62. physics

    Two blocks of masses m and 2m are held in equilibrium on a frictionless incline as in the figure. In terms of m and θ, find the following.
  63. physics

    a driver releases an air bubble of volume 2.0 cm^3 from a depth of 15 m below the surface of a lake where the temperature is 70C.
  64. Physics

    Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
  65. physics

    the earth is approximately sphere of radius 6.37*10^6 meter.what is its surface area in square km? what is its volume in cubic km?
  66. physics

    5. A bomber is flying at a height of 9 km at 800 km/h. How far in front of the target should he drop his bombs? show formulas*
  67. physics

    What amount of energy is used if 800 C of charge passing through a load with a potential difference of 120 v? answer is 9.6e+4
  68. Physics. PLEASE HELP!!

    When a 0.35 kg baseball is hit, its velocitychanges from 21 m/s to -29.5 m/s. What is the magnitude of the impulse de-livered by the bat to the ball? Answer in units of N · s
  69. physics

    When the ray of light travels from air to glass slab and strikes the surface of separation at 90 degree , then it ..........
  70. physics

    A boy walk 30m eastward and then 40m northward calculate the shortest from the starting point.
  71. physics

    Calculate the speed of a satellite moving in a stable circular orbit about the Earth at a height of 5400km.
  72. PHYSICS

    What's the total mechanical energy of a 300kg satellite in circular orbit 1400km above Earth's surface?
  73. Physics II

    A block begins to slide down a ramp after being elevated to an angle of 55 degrees. What is the coefficient of static friction?
  74. Physics

    An automobile is traveling 65mph. Its brakes decelerates at 6.0mps. How long will it takes to stop the car?
  75. physics

    is it possible to change both the pressure and the volume of an ideal gas without changing the average kinetic energy of the molecules?
  76. physics

    a boy with a mass of 60kg climbs a 10m vertially up a ladder. A) how far did he travel? B) how much work is done? C) what are the energy changes here?
  77. physics

    a pendulum of length L=9.8m hangs in equilibrium and is then given velocity v=0.2m/s at its lowest point.What is the magnitude of the subsequent oscillation?
  78. physics

    What is the net force on a Mercedes convertible traveling along a straight road at a steady speed of 100km/h?
  79. Physics

    a 4500 kg truck traveling at 17.5 m/s collides with a motionless 1350 kg car. they become locked together. if there is no friction, what is their velocity?
  80. Quantum Physics

    What is the probability current density of a particle with wavefunction ψ(x,t)=exp(iℏ(px−Et))?
  81. physics

    Determine the magnitude of the force of gravity acting on a 340 kg satellite , 850 km above Earth's surface.
  82. physics

    A violin string vibrates at 440 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end?
  83. physics

    if a ball is thrown vertically upward and is caught 5 seconds,how fast must have been going when it left the person s hand?help
  84. physics

    A bullet is shot straight down at a speed of 3.9 m/s. After 2.3 seconds, how fast is it moving? Use 10 m/s2 for gravity. Give answer in m/s.
  85. physics

    3 points particles with masses 4kg,2kg,3kg are at the corners of equilateral triangle of side m =2m.
  86. Physics

    Steam of mass 11.0 g at 100°C is added to 126.7 g of ice at 0.00°C. Find the final temperature of the system.
  87. physics

    city of K is 27 km north of I. Head west at 11:00 in the morning and arrive at 8:30 in the evening. What is my average speed and velocity
  88. physics

    a skier moving at 85 km/hr straight down a tall ountain having a 60 degrre slope. at what rate is his altitude decreasing?
  89. Physics

    How long would a braking torque of 3.17 N·m have to act to just stop a spinning wheel that has an initial angular momentum of 6.67 kg·m2/s?
  90. physics

    if a race cars velocity increases from 4 m/s to 36 m/s over a 4 s time interval, it average acceleration would be 10 m/s2. would this be true or false ?
  91. physics

    How much work is required to completely separate two charges (each -1.9 microC ) and leave them at rest if they were initially 6.0mm apart?
  92. physics

    Determine the magnitude of the force of gravity acting on a 340 kg satellite, 850 km above Earth's surface
  93. physics

    a ball of mass 0.1 is thrown up with an initial velocity of 80m/s calculate the potential energy half way up
  94. physics

    How much work is required to completely separate two charges (each -1.9 microC ) and leave them at rest if they were initially 6.0mm apart?
  95. physics

    A rotating wheel as an initial angular velocity of 10rad/s and 2.5rad/s^2.how many revolution does it will complete in 30seconds?
  96. physics

    one side of a square bolck is 20 cm. the block weighs 320 grams. which numeral could be used to express the density? is it 0.04, 0.25, 16, or 25?
  97. Physics

    An arrow is shot horizontally with a speed of 20 m/s from the top of a tower 60 m high .The time to reach the ground will be???????
  98. physics

    an airplane flying at 150 km/hr encouters a headwind of 30 km/hr. draw a vector diagram of this including the resultant.
  99. physics

    Find the power delivered to an element at t=3 ms if the current entering its positive terminal is i=5cos60πt A and the voltage is V=3 di/dt
  100. physics

    a pendulum of length L=9.8m hangs in equilibrium and is given velocoity v=0.2m/s at its lowest point.What is the magnitude of the subsequent oscillation?