1. Physics

    how many coulombs must be on one object for it to be repelled with a force of 6.0 N by a second charge of 2.0uC at a distance of 1.0 m?
  2. physics

    At what distance is the electrostatic force between two protons equal to the weight of one proton?
  3. physics

    a free body diagram of a boy sliding down a hill on a sled
  4. Physics

    For a pendulum that completes fifteen complete swings in 34.8 seconds, how much is the frequency?
  5. physics

    : what is the density of an object with the mass 60g and volume 25cm cube
  6. physics

    Which has the greater acceleration, a car that increases its speed from 50 to 62 km/h, or a bike that goes from 0 to 12 km/h in the same time?
  7. physics

    Calculate the momentum of a 100 kg object moving with velocity 10m/s
  8. physics

    Calculate the momentum of a 100 kg object moving with velocity 10m/s
  9. physics

    Despite of many attempts to introduce a universal language, the effort has met with very little success.
  10. physics

    A particle at rest undergoes an acceleration of 2.1 m/s2 to the right and 5 m/s2 up. a) What is its speed after 7.9 s? Answer in units of m/s.
  11. physics

    The third longest wavelength in the Paschen series in hydrogen corresponds to what transitions?
  12. physics

    The energy of the em waves is of the order of 15 kev.to which part of the spectrum does it belong?
  13. Physics Class

    The equation describing the motion of an object is y=0.8cos(4.2t+0.32). What is its period?
  14. physics

    if it costs 4.5 to 7.5 cents per kilowatt-hour (wind energy) what is the price per kW?
  15. Derivation of Physics Equation

    How do we derive these laws: (most of the time, the numbers are subscript) v'2 = v1 * ( (2 * m) / (m1 + m2) ) + v2 * ( (m2-m1) / (m1+m2) ) & v'1 = v1 * ( (m1-m2) / (m1+m2) ) + v2 * ( (2 * m2) / (m1 + m2) )
  16. physics

    show that in the limit that the radius of the sphere goes to zero to kept the magnetic moment constant
  17. Physics

    What happens to the focal length of a converging lens as the radius of curvature is increased?
  18. physics for Mr. Pursley

    I see 18% Nickel Alloy A (under pure silver) is listed as 2.874 x 10^-7 Is this what I should use?
  19. Physics

    what is the schwarzschild radius of a black hole with a mass of 1.68x10^43kg
  20. Physics

    Make a position vs time graph of the following scenario: an object moves at 5.0 m/s for 4.0 s then at -2.0 m/s for 3.0 s.

    A hypothetical planet has a mass 1.49 times that of Earth, but the same radius. What is g near its surface?
  22. physics

    what is your final velocity after 680 meters if you start out at 90km/hr and acceleration is 9 m/s
  23. physics

    What happens when you walk across a carpet and receive a shock when you touch a metal object.
  24. physics

    a body moving at 40 m/s accelerates at the rate of 8m/s^2. what is the distance it transverses in 15 seconds?
  25. Physics

    Find the centripetal acceleration of a car that rounds an 80 m radius curve at 10 m/s.
  26. Physics

    As the temperature of an object becomes higher, what happens to the average wavelength of the radiation it emits?
  27. physics

    The sensitivity of a galvanometer of resistance 990ohm is increased by 10 times.The shunt used is??
  28. physics

    Cylinder water tank 80cms height 1000liters what is its diameter
  29. physics

    find the acceleration produced by a net force of 300.0 N on a mass of 0.75 kg.
  30. physics

    Evaluate the Rydberg constant R using Bohr theory and show that its value is R = 1.0974x10-1.
  31. Physics

    In the photoelectric effect, what determines the kinetic energy of the ejected electrons?
  32. physics

    10 kg of ice at -4 C is dropped into 15.1 kg of water at 36 C. What is the final temperature of the mixture? T_final =
  33. physics

    if a force of 3000 n can move a crate at an acceleration of 10 m/s2, what is the mass of the object
  34. physics

    a car moving through road what is the direction of force and surface of acting
  35. Physics

    Resolve a force of 7.5N acting at an angle 40 to its horizontal an vertical components.
  36. physics

    determine the pressure of a 20 lb force is applied to an area of 10 inch squared
  37. physics

    determine the pressure of a 20 lb force is applied to an area of 10 inch squared
  38. physics

    if a swimmer swims 85.4 yards in five minutes, how many meters will he swim in 70.0 seconds?
  39. physics

    what is the speed of a sound wave if its frequency s 160 hertz and its wavelength is 2.2m?
  40. Physics

    A vibrating point on a spring travels 60 mm during three cycles. What is the amplitude of the vibration?
  41. physics

    what impulse is needed to slow a 45kg object from 15m/s to 12m/s?
  42. help physics

    If you have a pair of vernier callipers which have divisions of 0.05mm what would the absolute error be?
  43. Physics

    Find the length of a bridge if it is known that the steel in the roadbed expands by 0.52 m when the temperature changes from +2 to +30°C.
  44. physics 1

    need wieght in lb.s an apple weighs 1N mass in kilograms give weight in lb.s
  45. physics

    what is the displacement of the ball? i.imgur. com/8ljWh . png i don't know calculus!
  46. physics

    How much heat energy must be added to a 3.0 cm × 3.0 cm × 3.0 cm block of aluminum to raise its temperature from -50∘C to 50∘C?
  47. physics

    a 8.0 kg object undergoes an acceleration of 2.2 m/s squared.what is the resulting force acting on it?
  48. Physics

    In the olden days Christmas lights were wired in series. Why was this not very festive?

  50. Physics

    I am not getting the difference between distance and displacement.... without using the words scalar and vector quantity, of course, i know what they mean but still i need help with this... so please help!!!
  51. physics

    'perpetual motion' is ruled out of the realm of possibility because of which law of thermodynamics?
  52. active physics

    a 25 mewton force pushes against a 5 kg. mass. what is the acceleration??? what formula do i use?? F=ma
  53. physics

    find the acceleration of a bicycle slowing fron 3m/s to a stop in 5 seconds?
  54. physics

    how do you compare mass and weight on the earth, moon, and outer space?
  55. Physics

    Find, to 3 decimal place, the frequency of the hour hand of a clock
  56. Physics

    What term describes a force that causes an object to move in a circular path?
  57. Physics

    The acceleration of a certain rocket is given by ax=bt where b is positive constant, find the position and velocity at t=5.0s if Xo=0 and Vo=0 and b=3.0m/s^3?
  58. physics

    The acceleration of a certain rocket is given by a=bt where b is positive cnstant, find the position function Xo and Vo at t=o?
  59. Physics

    what is the northward and eastward components of a 550 kph velocity of an airplane going NE?
  60. physics

    75 kg block is dropped from a height of 6 m. How much kinetic energy does it have when it has fallen halfway?
  61. So what about this one bob? Physics

    Which of the following is closer to a guess? hypothesis<<<<< law question theory
  62. Physics

    What can we say about the force of an object when the mass increases and acceleration remains constant?
  63. Physics

    Compute the k.e in joule of a 500g riffle bullet traveling at 300m/s
  64. physics 102

    What are the wavelengths of electromagnetic wave in free space that have the following frequencies? (a) 3.00 10^19 Hz pm (b) 7.50 10^9 Hz cm
  65. Physics

    Why does tension in a rope increase as the rotational speed of a ball increases?
  66. Physics

    Charges q1 and q2 lie on the x-axis at points x= -a and x= +a respectively a) how must must q1 and q2 be related for the net force +Q placed at x= +a/2 to be zero?
  67. Physics

    What is the magnitude of the momentum of a 10,000-kg truck whose speed is 12.0 m/s? What is the kinetic energy?
  68. physics

    explain why air moving over an object can increase its rate of cooling.
  69. Humanities Core

    In what ways can we say that quantum physics both is and is not classical science? it has something to do with galileo but im not sure....
  70. physics

    how long will it take for an apple falling from a 29.4m tall tree to hit the ground? how
  71. physics

    A storage tank of negligible mass and 30 m high is filled with gasoline
  72. Physics

    According to special relativity, the momentum (mv) of an object at relativistic speed is actually: more, less or no different than if it were at rest
  73. physics

    How does pressure work as a restoring force to create a sound wave?
  74. physics

    if a plane is flying 235 km/h and encounters west wind at 80 km/hr. What's its new velocity?
  75. Physics

    If you combine 34 kg of ice at 0°C with 80 kg of steam at 100°C, what is the final temperature of the system? °C
  76. physics

    A vector has a magnitude of 18.0 cm and makes an angle of 103.0° with the positive x-axis.
  77. physics

    where would the image of a 4.0 cm tall object that is 12 cm in front of a flat mirror be located?
  78. Physics

    How many calories of heat are gained to turn 10 grams of ice at 0 C into water at 0 C?
  79. physics

    Suppose a rock fell off a cliff. After 5 seconds, its speed well be 100 m/s
  80. Physics

    What equation gives the velocity as a function of time for an object with constant acceleration?
  81. physics

    What Net Force is necessary to give a 2.0 kg mass initially at rest an acceleration of 5.0 m/s^2?
  82. Physics

    A person with a mass of 85kg. How much in newtons do they weigh on the earth and the moon?
  83. physics

    A meteoroid is speeding through the atmosphere, traveling east at 19.5 km/s while descending at 12.7 km/s. What is its speed, in km/s?
  84. Physics please please help me

    Prove the law for triangle ABC i.e sin A/a=sinB/b=sinC/c Please help me!
  85. Physics

    How long does it take light traveling from the sun at 3.0 x 10^8 m/s to reach Jupiter, which is 780 x 10^6 km away?
  86. Physics

    If you must stop your moving car in a hurry, should you slam on the brakes and lock them?
  87. physics.

    an object travels 219 meters with acceleration 6.43 m/s^2 over an interval of 2.86 seconds. What are Vi and Vf.
  88. Physics

    What would the experimental value of g be if the slope of the graph represents 1/2 g and the equation is y=5.00x-.0109639087
  89. Physics

    What is a node? i'm supposed to label the nodes in a diagram of a wave but i can't find it anywhere
  90. Physics

    What element results if two protons and two neutrons are ejected from a radium nucleus?
  91. Physics

    A car slows to a stop over a certain distance. What could cause the stopping force to be greater?
  92. Physics

    I drop an object from a height of 500.0 m. How long does it take to hit the ground?
  93. Physics

    4. Find the magnitude of the force between two charges Q1 = 3µC, Q2 = 2.5µC that are 50mm apart.
  94. physics

    in deep space a gun is fired; how much force will be required to keep the bullet going?
  95. Physics

    6. Two charges, Q1 = 4.6x10-9 C and Q2 = 4.3 x10-9 C, are 60mm apart. What is the electric field halfway between them?
  96. Physics

    show that the oscillation of a liquid in a u-tube is in simple harmonic motion.
  97. Physics

    Finding of radius of capillary tube without knowing surface tension
  98. Physics/chemistry

    Describe the partcle Theory of a HOt air Balloon?
  99. physics

    What equation gives the position as a function of time for an object with constant acceleration?
  100. physics

    A car that decreases its speed from 100 km/h to 20 km/h undergoes ______ acceleration.
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