physics please HELP !

74,996 results, page 80
  1. physics

    Find the distance by which a 43cm diameter, 8.7m tall concrete column is compressed when it supports a 12400kg load
  2. physics

    what is reaction product when ethene is treated with steam using phosphoric acid as catalyst at 300 degrees celcious
  3. physics

    A 2.284 km car is moving down a road with a slope of 13% at a constant speed of 11 m/s. What is the direction and magnitude of the frictional force?
  4. AP Physics<<help

    A 1.7 kg bundle starts up a 30 degree inlcine with 105 J of Kinetic Eneergy, How far will it slide up in the plane if the coefficient of friction is .3 ?
  5. physics

    draw a particle model and a motion diagram for A bike travels at constant speed of 4.0 m/s for 4 s then slow down to come at rest in 3 s.
  6. Physics

    Find the speed of a pendulum bob at the bottom of its swing if its initial displacement is 5.34o and its period is 2.534 s.
  7. physics

    A ball is thrown straight up with an initial speed of 60 m/s. How high does it go? Assume the accelera- tion of gravity is 10 m/s22
  8. physics

    Write a multiple-choice question that requires the reader to apply conservation of momentum to a system of two objects.
  9. physics

    How does the presence of an atmosphere affect the length of day and night? I am thinking by the rising and setting of the moon and sun. Is this right? Thank You.
  10. Physics

    Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 83 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?
  11. Physics

    What is the minimum work in joules needed to push a 1840 kg car 14.0 m up a 12.5 degree incline? (Ignore friction.)
  12. physics

    a uniform rod is 1m caring a weight of 100N calculate its tension of the string holding it an the reaction at the hinge
  13. physics

    Calculate the time required for an astronaut to free-fall 50 m on the Moon. Please show and explain steps answer is 7.9s
  14. Quantum Physics

    What is the maximum value of the wavelength of light that will ionize the hydrogen atom? Express your answer in units of nanometers.
  15. physics

    Leroy, who has a mass of 90 , is skateboarding at 8.6 when he smacks into a brick wall and comes to a dead stop in 0.2 .find the force of impact
  16. physics

    how long will it take a 1750-watts motor to a lift a 285-kg piano to a sixth storey window 1.6 meters above
  17. Physics

    If 500 grams of a metal requires 70 calories of energy to raise its temperature by 10 Kelvin, what is its specific heat?
  18. Physics

    An electric filament can heat 200 cm^3 of water from 5°C to 95°C in 6 minutes. If the voltage source is a 12 V battery, how much current does it draw?
  19. science physics

    Two locomotives approach each other on parallel tracks. Each has a speed of v = 95 km/h with respect to the ground. If they are initially d = 7.5 km apart, how long will it be before they reach each other?
  20. physics science

    Please can you help as I am stuck, Describe ib detail, how you would carry out an investigation to measure the density of a block of aluminium? Thankyou
  21. physics

    How fast must a 3000 lb car be traveling to hit a 4000 lb minivan on the side rear to spin it 180°
  22. physics

    Peter Pan is suspended in space. He throws an entire jar of pixie dust to his left. Which way does he move?
  23. Physics

    What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6*10^6 m/s?
  24. physics

    a car acclerate uniformly from rest andattains a speed of 40m/sin 10second itcoversa distanceof
  25. PHYSICS(HELP)

    Eight charges (50μC each) are arranged on the corners of a cube side length 1 cm. What is the magnitude of the force on each charge in Newtons?
  26. Physics

    Two Dimensional Projectile Question: Determine the height reached by a baseball if it is released with a velocity of 17.0 m/s [at an angle of 20 degrees]
  27. physics

    Find the distance by which a 42cm diameter, 9.4m tall concrete column is compressed when it supports a 12900kg load
  28. grade nine science physics

    Do these SI measurements sound correct Voltage = volt Current = ammeter resistance = ohm
  29. physics

    A vector points 34.8 degrees to the Northeast with magnitude 15. What are the north and east components that make up the remainder of the triangle?
  30. Physics

    A bean jumps vertically off of a table. It has a speed of 10 m/s when it reaches half of its maximum height. How high does it rise?
  31. Physics

    Standing on a bridge, you throw a 3.0 g stone straight upward with speed of 2.5 m/s. How long does it take to return to the original position?
  32. physics

    What is the acceleration (in meters/second^2) of a freely falling 73.0 kg sky-diver, if air resistance exerts a force of 273 N?
  33. physics

    How long would a 150 W lightbulb have to glow to produce the same amount of energy expended by Georgie? Answer in units of s.
  34. physics science

    Please can you help as I am stuck, Describe ib detail, how you would carry out an investigation to measure the density of a block of aluminium? Thankyou
  35. Physics

    A body is projected at angle of 30 degree with the horizontal at an initial speed of 200m/s.how far from the point of projection will it strike
  36. College Physics

    two charged particles are located on an x axis: -q = -4.80 × 10-19 C at x = -3.00 m and q = 4.80 × 10-19 C at x = 3.00 m. What are the (a)x- and (b)y- components of the net electric field produced at point P at y = 5.00 m?
  37. Physics

    A tyre is suddenly brust when it was pumped to a presure of 4 atm at 20 degree celsius. Calculate the final temperature.
  38. Physics

    A bomb explores in mid air into two equal fragments.what is the angle between their direction of motion? Ans:- 180°
  39. Physics

    A police cruiser is travelling at 24 m/s and slows down at a rate of 0.65 m/s2 until it stops. The distance traveled by the cop while slowing down is closest to
  40. Physics

    What is gravitational force of a 65kg person that is on the surface of the moon has a mass of 7.348 x 10^22kg and radius of 1731km?
  41. Physics Honnors

    A 15 kg block of wood is sitting on a 1.5 meter high shelf. Calculate its gravitational potential energy
  42. physics

    How do you measure a unidentified capacitor when you have a identified one as well as voltmeter, a ammeter, a resistor and a light bulb as well as 3 1,5 batterycells. You have a conductinhcords?
  43. Physics

    A baseball has a mass of 0.15 kg. A pitcher throws a 40 m/sec fastball which is caught by the catcher. What is the change in momentum of the ball?
  44. physics

    what is the force required to start moving a 25kg box across a concrete floor with a coefficient of static friction of .65?
  45. physics

    A satellite orbits at an average altitude of h = 441 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 1024 kg.
  46. physics

    what is the coefficient of kinetic friction between a 2kg brick and concrete if it takes 9.0N of force to move it at a constant rate?
  47. physics

    An 87.0 kg fullback moving east with a speed of 5.0 m/s is tackled by a 83.0 kg opponent running west at 2.92 m/s, and the collision is perfectly inelastic.
  48. Physics/Science

    If a lever problem asks you to find a way to "lift" something, does that mean to balance the object(s), or to tilt it past the equilibrium?
  49. physics

    an object falls from a plane flying horizontally at an altitude of 40,000 ft at 500 mi/h. How long will it take to hit the ground?
  50. physics

    If we wanted a block of iron of mass 3.25 kg to acquire a positive charge of 0.100 C, what fraction of the electrons would we have to remove?
  51. physics

    Two positive charges of 6.83 µC each are 673 cm apart. Find the electric field midway between them. The value of the Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 .
  52. Physics help

    How fast would you need to be travelling relative to an observer in order for them to see a 15% increase in your mass? How do I rearrange the formula to solve for v m = n/sqrt(1-(v^2)/c^2))
  53. Physics

    A 185kg refrigerator is loaded into a van by moving it up a 10.0m long frictionless ramp that is at an angle of 11.0 degrees. How much work is done?
  54. Physics

    A police cruiser is travelling at 24 m/s and slows down at a rate of 0.65 m/s2 until it stops. The distance traveled by the cop while slowing down is closest to A. 0.44 km. B.0.38 km. C.0.42 km. D.0.36 km. E. 4.0 km.
  55. physics

    what is the formula for finding the magnitude of average acceleration simplified into length, velocity, time, and delta units?
  56. Physics

    How fast must a 138 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with A = 100. pm?
  57. Physics

    A 1200kg car accelreates from 0mph-60mph in 8.5 seconds. Calculate the force needed to accelerate the vehicle.
  58. Physics

    How does Rutherford's model of the atom account for the back-scattering of alpha particles directed at the gold foil?
  59. physics

    jeritex mass is 60kg. if he climbs up the flight of stairs 13 meters high in 20 seconds, what is his power output?
  60. physics

    If a 264 Hz tone is emitted from a piano on a concert stage, how long will it be before a person in the balcony, 60 m away, hears the note?
  61. Physics

    Hello, I am wondering if someone can answer me this question: In an Atwood machine why do the tensions that handle both bodies are the same? (English is not my native language)
  62. Physics

    i spent so much time putting this equation together, but now I'm so confused solving for T 110 g x 4.816 J/g/C x (T-17)+31g x 0.385J/g/C x (T-300)=0 Can you help me
  63. physics

    Simpson drives his car with an average velocity of 48.0 km/ to the east. How long will it take him to drive 144 km on a straight highway?
  64. physics

    A 4.3kg object moves across a floor with a velocity of + 8.2 m/s and slides to rest in 5.8 s. The net force producing this acceleration is:
  65. Physics

    What types of material would be a good choice to shield a sensitive electronic device from stray electric fields?
  66. Physics

    A satellites are placed in a circular orbit that is 1.62 × 108 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance?
  67. physics

    Five forces act on an object. (1) 57 N at 90° (2) 40 N at 0° (3) 77 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?
  68. physics

    what change in velocity would be produced on a body of mass 4kg, if a contact force of 16N act on it for 2sec.
  69. physics

    A uniform steel chain 20 m long and with a mass of 5 kg per m, hangs vertically. Compute the work required to wind it up
  70. Physics

    How much work does the electric field do in moving a -7.7 micro Coulomb charge from ground to a point whose potential is +55 V higher?
  71. Physics

    A man holds a child on his shoulder while watching a football match.how much work is done if the game lasts for 2hours
  72. physics

    Charge polarization is normally produced by ____________________. A) nuclear interactions.B) contact.C) induction.D) friction.E) electrostatic means.
  73. Physics

    A typical lightning flash delivers about 27C of negative charge from cloud to ground. How many electrons are involved?
  74. Physics

    i spent so much time putting this equation together, but now I'm so confused solving for T 110 g x 4.816 J/g/C x (T-17)+31g x 0.385J/g/C x (T-300)=0 Can you help me
  75. physics

    A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.3 N acts on it for a distance of 0.5 m
  76. Physics

    In a vacuum, two particles have charges of q1 and q2, where q1 = +3.7 µC. They are separated by a distance of 0.22 m, and particle 1 experiences an attractive force of 3.5 N. What is q2 (magnitude and sign)?
  77. physics help please

    An airplane that can fly at 300 km/hr is flying at 210 when it is hit by a wind of 125 km/hr at 110. What is the new velocity of the plan?
  78. Physics

    at what distance would a convex magnifing lens that has a focal length of 10 cm have to be held for an image to appear upright and 3 cm tall? [6.67cm]
  79. Physics

    A pebble is dropped from rest from the top of a tall cliff and falls 4.9meters after 1 second has elapsed. How much further does it drop in the next 2 seconds?
  80. physics

    016 (part 1 of 2) 10.0 points A speedboat increases in speed from 17.9 m/s to 31.8 m/s in a distance 188 m. Find the magnitude of its acceleration.
  81. AP Physics PLEASE respond immediately pleasethanku

    THANK YOU!! What is a combination of h (plancks constant), c(speed of light) and G (6.67x10^-11 Nm^2 / kg^2) that has units of length?
  82. physics

    How long would it take to bring a 318 kg car moving at 11.2 m/s to a complete stop if a 602.8 N breaking force is applied?
  83. physics

    An aeroplane lands on the runway at velocity 180km/hour and decelerates at 0.4 m/s^2 find the time taken until it stops and the displacement.
  84. physics 11

    a small 900kg sports car can deliver 100Hp to the pavement. how quickly can it reach 30m/s from rest?
  85. physics

    Two freight cars, each with a mass of 3.9 105 kg, collide and stick together. One was initially moving at 3.2 m/s and the other was at rest. What is their final speed in m/s?
  86. physics

    if you have and open end air column with a length of 75.0 cm and the fifth harmonic is 1175 hz, what is the fundamental frequency? what is the speed of the wave?
  87. Physics

    How would you use a concave mirror of radius of convatrue 18cm to give a four time magnified erect image of an object?
  88. physics

    If the 60-kg player is running forward at 7.0m/s when she makes contact with the dummy, what is the players velocity at the end of the 1.20s impact?
  89. Physics

    How would you use a concave mirror of radius of convatrue 18cm to give a four time magnified erect image of an object?
  90. physics

    a 1200-kg automobile travels at a speed of 90-km/h (a)what is the kinetic energy? (b) what is the net work that would be required to bring it to a stop?
  91. physics

    What potential difference is needed to stop an electron having an initial speed of 3.70x 105 m/s? Answer in volts
  92. Physics

    Two objects attract each other gravitionally with a force of 2.5 *10^-10 N when they are .25m apart. Their total mass is 4.0kg. Find their individual masses.
  93. Physics

    A body travels from rest with acceleration 8m/s(squared)Find its velocity when it has covered a distance of 100 meter?
  94. Physics

    1. What is happening to that air between the instruments and your ears? 2. How can you produce the change in the frequency? 3. Describe how the notes are produced in a violin?
  95. physics

    A police cruiser is travelling at 24 m/s and slows down at a rate of 0.65 m/s2 until it stops. The distance traveled by the cop while slowing down is closest to
  96. physics

    Any ideas? A bird flying at 3m/'s west is given an acceleration of 1ms after five seconds what I'd it's velocity and how far has it travelled from its starting point?
  97. Physics

    An object slides down a frictionless 33 degree incline whose vertical height is 54.0 cm. How fast is it going in meters/second when it reaches the bottom?
  98. Physics

    What is the minimum work in joules needed to push a 1460 kg car 14.0 m up a 12.5 degree incline? (Ignore friction.)
  99. physics

    a particle completes 4 revolution/sec on a circular path of radius 0.25m.calculate angular velocity
  100. Physics

    h_ttp:_//img215_.imageshack_.us/gal_.php?g=88875061_.jpg Anyone care to do....all the problems D:. Yes, I am desperate. (take away the underscores)