physics please HELP !

74,641 results, page 50

  1. college physics

    Find the height from which you would have to drop a ball so that it would have a speed of 8.4 m/s just before it hits the ground.
  2. Physics

    How would you change the following Galilean transformation equations in the case where a frame was moving both in the x and the y direction? (Use the following as necessary: x, y, z, Vx, Vy, t.) x' = y' = z' = t' =

  4. physics

    An ambulance is going away from me @ 40mph with a siren @ 1000Hz.Will I heat a higher or lower frequency
  5. Physics

    What must be the orbital speed of a satellite in a circular orbit 740 km above the surface of the earth?
  6. physics

    What is the electric potential at the center of the square shown in the figure below? Assume that q1 = 1 x 10-8 C, q2 = -2 x 10-8 C, q3 = 3 x 10-8 C, q4 = 2 x 10-8 C and d = 1 meter.
  7. physics

    A football is kicked with an initial velocity v=9i+12j. Find the speed in (m/s) of the ball after 2.4s A) 9.2 B) 10.8 C) 12 D) 15

  9. physics

    vander waal b for oxygen is 32 cm3/mol compute the diameter of o2 molecule.
  10. Physics

    A tennis ball is thrown up in the air. It stays there for 12.1 seconds how fast did you throw it?
  11. physics

    how much heat is needed to raise the temperature of 5kg of silver from 20 degrees C to 96 decgrees C?
  12. physics

    two charged objects carry a negative charge of 2*10c. calculate their distance apart
  13. physics

    How far will a car moving at 50 miles an hour travel in the time it takes to sneeze?
  14. physics

    a 150g-iron ball at 95 Celsius is dropped into a cavity in a block of ice
  15. Mathematics-in-Physics

    If two objects were traveling at the speed of light would they explode on impact or pass through each other?
  16. Physics

    Who was Isaac Newton? Write a brief paragraph about his life and work (include a bibliography)
  17. Physics

    KNOWNS: Diverging (convex) mirror Radius of curvature = 60 cm (f = 30 cm) M = 1/5 Hi = 20 cm UNKNOWNS: Ho? Di? Do? EQUATIONS: 1/Do + 1/Di = 1/f M = Hi/Ho = -Di/Do
  18. physics

    Consider the following specific case of the system described in the example above. Suppose the angle θ is 78.0° and the mass of the ball is 7.00 kg.
  19. physics

    what force is required to make an object of mass 500g accelerate at 4m/s2 (sqaured) ?
  20. physics

    If one walks straight up a 10 degree incline, what is the height achieved after walking 10 kilometers ?
  21. physics

    At what distance would the repulsive force between two electrons have a magnitude of 8.50 N? I have no idea how to do this problem... can someone help me please... 3x10^-4/8.50?
  22. physics

    Things around you are emitting infrared radiation that includes the wavelength 1.44 10-5 m. What is the energy of the photons?
  23. physics

    a body is thrown downward with an initial speed of 20.0 m/s on earth. what is the acceleration of the object
  24. Physics

    What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east?
  25. physics

    The density of a solid ball with a mass of 231 g and a volume of 110 cm^3 is ____ g/cm^3.
  26. Physics

    What Net Force is necessary to give a 2.0 kg mass initially at rest an acceleration of 5.0 m/s^2? Is the answer 10. N?
  27. physics

    Calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 8600 km above the earth's surface.
  28. Physics

    What are the horizontal and vertical components of a cat's displacement when it has climbed 5 m directly up a tree ?
  29. physics

    compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
  30. physics

    compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
  31. physics

    how many electrons must be removed from an electrically neutral silver dollar to give a charge of +2.8 uc
  32. physics

    compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
  33. Physics

    Will a cyclist coast farther if the lamp connected to his generator is turned off? Explain.
  34. Physics

    An object is thrown upwards with a speed of 14.0 m/s. How long does it take to reach its maximum height
  35. physics

    which object will have higher inertia a rock of 20kg or a hollow ball of 22kg
  36. physics

    If Michael Jordan has a vertical leap of 1.29 m, then what is his takeoff speed and his hang time?
  37. physics

    A stone is thrown up with a velocity of 39.2 at an angle of 30° above the horizontal find at what times, it will be at a height of 14.7
  38. Physics

    A block of mass 8.1 kg is pulled to the right by an applied force of 76.2 N. If the acceleration is 0.84 m/s^2, how much friction must be present?
  39. Physics

    The maximum kinetic energy of a mass-spring system in SHM is equal to
  40. Physics

    How does the conservation of mechanical energy explain why a planet in an elliptical orbit changes speed?
  41. physics

    A ball strikes against the floor and returns with double velocity.In which type of collision is it possible?
  42. Physics

    An object initially at rest experiences an acceleration of 9.8 m/s^2. How much time will it take to achieve a velocity of 58 m/s?
  43. Physics

    1. Name three different kinds of graphs that are often used to plot information and discuss the value of each. i have no idea what the heck this means
  44. physics PLEASE HELP

    how do you rearrange this equation weight=T1sin57+[T1cos57/cos23.5]xsin23.5 when you're trying to isolate T1?????
  45. physics

    The equation y=5sin(3x-4)where y is in millimeters x is in metres and t is in seconds,represents a wave motion
  46. physics

    how to calcula distance of a object in free fall if only the time it reaches the ground is given
  47. Physics

    A car going 50 m/s undergoes an acceleration of 2 m/s^2 for 6 seconds what is the final velocity ? How far did it travel while it was accelerating?
  48. physics

    in joule thomson effect,why the temperature of inversion leads to negative sign?
  49. physics

    when looking at a window, you see two reflected images slightly displaced from eachother. Why/ Is it because glass is more dense.
  50. physics

    Why electric dipole moment between two charges points from negative to positive charge.
  51. physics

    A person can jump to a height of 1.5m on surface of earth. Find the velocity with which he jumps.
  52. Physics

    how to find the average velocity and speed for an entire postion time graph
  53. physics

    newyorks 33-m tower oscilatesnin the wind with a period of 6.80s calculate the frequency
  54. physics

    Estimate the magnitude of the electric field in a cell membrane with a thickness of 8nm
  55. physics

    Good job "Drwls", your answer to my bowling ball question worked. Way to go!
  56. physics 8th grade

    If a woman hasa mass of 50 kg calculate her weight in neutons
  57. Physics

    An engine works between the two temperatures 200 C and 120 C. Calculate its efficiency in percentage?
  58. Physics

    If a 65 kg sprinter can accelerate from a standing start to a speed of 12 m/s in 3 s, what average power is generated?
  59. physics

    Find the density of a substance whose mass is 28 grams and whose volume is 4 cubic centimeters
  60. Physics

    Throw a stone straight up in the air. At its highest height what is its speed? Is it accelerating then?
  61. physics

    What quantity of energy is represented by 250cm^3 of a gas 100N.m^2 when the temperature is kept constant
  62. physics

    if an object has a mass of 615grams and a volume of 150cm3 is the density 5.86g/cm3
  63. Physics

    a projectile is launched with an initial velocity of 60 m/s at an angle of 30 degrees above the horizontal. how far does it travel?
  64. physics

    What is the temperature of an ideal gas whose molecules have an average translational kinetic energy of 3.90 10-20 J? K

    What is the inductance L of a 0.40 m long air-filled coil 3.2 cm in diameter containing 10,000 loops?
  66. physics

    calculate the impulse necessary to stop a 1500 kg car travelling at 90km/hour

    If the current in a 100 mH coil changes steadily from 25.0 A to 10.0 A in 375 ms, what is the magnitude of the induced emf?
  68. physics

    calculate the force of a 300,00 kg jumbo jet that is accelerating 0.4m/square just before takeoff
  69. Physics

    How much energy in kilocalories is expended against gravity alone by a 75- kg man climbing 1500 m up a mountain?
  70. physics

    A giant bull running at 15 m/s slows at a rate of 2.4 meters per second per second. How long does it take it to stop?
  71. physics

    An object is dropped onto the moon (gm = 5 ft/sec2). How long does it take to fall from an elevation of 250 ft.?
  72. physics

    determine the thrust produced if 1.5 x 10^3 kg of gas exits the combustion chamber each second, with a speed of 4.00 x 10^3 m/s
  73. Physics

    An object is shot upwards, from the ground, with an initial velocity of 120 m/s. How high will it be after 4.0s?
  74. Physics

    In what distance can a 25 gram bullet traveling at 250m/s be stopped by force of 5000N?
  75. physics

    Much much force is needed to push a container with wheels that weighs 250 pounds

    is air resistnace negaitve because it opposes the motion?
  77. PHYSICS-

    Given a plastic rod and fur,explain how you would charge the electroscope positively and negatively.
  78. Physics

    Calculate the tangential speed of the earth around the sun (assuming a circular orbit).
  79. physics

    From what height would a compact car have to be dropped to have the same kinetic energy that it has when being driven at 100 km/h?
  80. physics

    A fisherman's scale stretches 3.5 cm when a 2.1 kg fish hangs from it. What is the spring stiffness constant?
  81. Physics

    How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC?
  82. physics

    If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 63 cm*29 cm*20cm, what would its mass be?
  83. physics

    would someone in a lift feel lighter or heavier as it accelerated upwards? explain your answer.
  84. physics

    How center mass affects an arrows distance traveled (include source)
  85. Physics

    Calculate the average speed (in km/h)of Larry, who runs to the store 3.6 kilometers away in 40 minutes.
  86. physics

    Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C
  87. physics

    Results for: In An Ideal Transformer, The Voltage And Current Are 220V,2A And Those In Secondry Are 2000V, IA. The Value Of I Is?
  88. Physics

    How much is needed to melt an ice cube, 3 centimeters on each side at 0 degree celcius?
  89. Physics

    Determine the acceleration of an electron placed in a constant downward electric field of 4.0X10^5N/C.
  90. physics

    The diameter of the earth is about 7.6 x 10^3 miles. What is the linear velocity of a person, on the equator, in feet per second?
  91. physics 2

    1)what potential differences must be applied across across a 1500 resistor in order that the resulting current be 50.mA?
  92. physics

    What is the total mechanical energy of a 20 kg owl flying at 5.0 m/s through the air at a height of 25 m above the ground?
  93. physics

    a truck moving at 100kph has a mass of 27000 kg. what force is necessary decelerate it at rate of -3 m/s²?
  94. physics

    Two 2.5 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
  95. physics

    What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway?
  96. PHYSICS!!

    free body diagram of a 4 kg bucket accelerating downward 2 meters per second squared
  97. Physics

    (a) Calculate the speed of a proton after it accelerates from rest through a potential difference of 285 V.
  98. physics

    the angle between two forces of 32 AND (neutrons) and 47 N is 36 degrees. Find the magnitude of the resultant force
  99. physics

    Calculate the coefficient of kinetic friction for tyre rubber on the road surface.
  100. physics

    What is the frequency of the microwaves in a microwave oven? The wavelength is 12 cm. I have to give the answer in GHz
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