214,834 results, page 49

  1. Physics

    How can you easily increase the magnetic field strength inside a current carrying coil?
  2. Physics

    What is the de Brogile wavelength of an electon that strikes the back of the face of a TV screen at 1/10 the speed of light?
  3. Physics

    A cube of ice weighing 18 grams sublimes into vapor. How many liters of gas will you get?
  4. Physics

    What does shifting the phase between the sources in a double slit experiment do to the interference pattern?
  5. Physics

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

    Could someone tell me the formula for finding distance when time is given and the acceleration is constant?
  7. Physics

    What is the value of a if the object is moving with constant velocity? What does this equation reduce to in such a case?
  8. 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?
  9. 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?
  10. physics

    Is it possible to calculate the torque acting on a rigid body without specifying the origin?
  11. physics

    A 1100 kg sports car accelerates from 0m/s to 33m/s in 13s What is the average power of the engine?
  12. physics

    A 4430-kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?
  13. Physics

    Runners in the 100-m dash use starting blocks. Explain what this device does. PLEASE HELP.
  14. physics

    A 1.5 volt battery will increase the potential energy of ________________ coulombs of charge by 0.18 joules.
  15. physics

    What happens when you walk across a carpet and receive a shock when you touch a metal object.
  16. 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.
  17. physics

    If a car is traveling westward with a constant velocity of 20 m/s, what is the net external force acting on it?
  18. Physics

    If the change in position Dx is related to velocity v (with units of m/s) in the equation Dx = Av, the constant A has which dimension? a. m/s^2 b. m c. s d. m^2 I chose b?
  19. physics

    How can you easily increase the magnetic field strength inside a current-carrying coil?
  20. Physics

    How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?
  21. physcal science/physics

    what is the kinetic energy in joules of a 1000 kg car travelling at 90km/h
  22. Physics

    What is the de Broglie wavelength of an electron that strikes the back of the face of a TV screen at 1/9 the speed of light?
  23. Physics

    Thanx DRWLS! Worked like a charm and I checked behind myself with the same formula!!!
  24. Physics

    Another one, sorry! =P This stuff is really confusing.. Why doesn't friction depend on surface area?
  25. physics

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

    At what temperature is the rms speed of helium molecules half its value at STP (0 C}, 1.0 atm)?
  27. physics

    if a block of wood dropped from a building has attained a velocity of 78 m/s how long has it been falling?
  28. Physics

    what is the mass of hydrogen peroixide, H2O2, in 350 grams ofa 20% by weight solution?
  29. Physics

    A mass of gas has a volume of 380 cm3 at a pressure of 560 mm Hg and a temperature of 7C. What is its bolume at s.t.p.?
  30. physics

    how much energy is gain by an electron accelerated through a potential differenc of 30000v?
  31. grade 11 physics

    what is the index of refraction of a medium in which the speed of this radiation is 2.54X10^8 m/s? I don't even know where to start...
  32. physics

    Determine the percent error in this approximate value. (There are 365.24 days in one year.)
  33. physics

    What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 ?
  34. Physics

    What experiment can be used to prove that the value of gravity near the earths surface is constant ie. 9,8m.s
  35. physics

    A crane lifts 1 tonne of concrete through a height of 25 m. How much work does it do? (1 kg has a weight of 9.81 N.)
  36. Physics

    Describe the acceleration time graph of a car traveling forward and applying its brakes.
  37. Physics

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

    A 1300 kg sports car accelerates from rest to 90 km/h in 7.0 s. What is the average power delivered by the engine?

    A race car's velocity increases from 3.6 m/s to 32.4 m/s over a 5-s time interval. What is its average acceleration?
  40. Physics

    At a spot in the ocean, the surface irradiance is 7.8*10^16 photons and k=.14 m^-1. At what depth does the euphotic zone end?
  41. Physics

    What's the tangential acceleration of a freely swinging pendulum when it makes an angle θ with the vertical?
  42. physics

    How much energy is produced when the sun converts one kg of hydrogen into helium?

    Didn't mean to ask but i was really curious and didn't get an answer from researching.Why is physics necessary in becoming a dentist?
  44. physics

    Good job "Drwls", your answer to my bowling ball question worked. Way to go!
  45. 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
  46. Physics

    A positive and a negative charge, each of magnitude 1.0 10-5 C, are separated by a distance of 12 cm. Find the force on each of the particles
  47. Physics/ optics

    An object is located 25cm in front of a +6.00 lens, where is the image? is it real or virtual?
  48. Physics

    In a hydrogen atom, if the radius of the orbit of the electron is doubled, then its energy will ... >> Increase by a factor of 2??
  49. physics

    pls what is the formula for calculating period given gravity, mass and length of the material
  50. Physics

    What is the difference in blood pressure between the head and feet of a person of height 171 cm?

    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?

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

    what is the most important element for creating a magnetic field. and why? Moving charges..... right?
  54. physics

    do all electrons ejected from a metal surface have the same kinetic energy?
  55. physics

    How much work must be done to increase the speed of an electron from 0.200c to 0.210c? In (MeV)
  56. Physics

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

    if the piston is in thermal equilibrium but the it is pushed inward, can there be a change in temperature(increase) even if Q=o
  58. Physics

    What is the strength of the magnetic field a distance of 1 meter from a wire carrying a current of 1 A? B=MoI ------ 2(pi)r Mo=4(pi)x 10^-7 I=1 A How do I know what r is?
  59. physics

    Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)
  60. physics

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

    What is the centripetal acceleration of a skater moving with a tangential speed of 2.0 m/s in a circular path with radius 2.0 m?
  62. physics

    A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2. what is the mass in kg?
  63. Physics

    If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?
  64. Physics

    If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?
  65. physics

    An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 15.0 s. What distance does the car travel?
  66. Physics

    a runner moving at a speed of 5.60 m/s rounds a curved track with a 60.0 m radius. what is the runners acceleration?
  67. physics

    A plastic bobber just barely floats in water. If it weighs 2N in the air, what is its volume
  68. Physics

    While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?
  69. physics

    please shelp me with this problem what is the stopping potential (V) if the wavelength of the incident light is 400 nm??
  70. Physics

    if you push a wall with a force of 50N, the work you do is...... (a)500J (b)5000J (c)50J (d)zero
  71. physics

    how high must a 2 kg basketball be thrown so that the top of its arc, it has a potential energy of 160J?
  72. physics

    The space shuttle traves in orbit at 210000 km/hr. How far will it travel after 5.0 hrs?
  73. physics

    if you jump upward with a speed of 2mls, how long will it take before you stop rising?
  74. College Physics

    What is the work required to move a proton 1 cm along the 7 volt equipotential line?
  75. physics

    In the ideal case of zero resistance, a ball rolling on a level surface will accelerate
  76. Physics

    Absolute temperature is proportional to the average kinetic energy of the atoms. True or false?
  77. physics

    A car travels in a straight line for 4.5 h at a constant speed of 61 km/h . What is its acceleration? Answer in units of m/s2.
  78. physics

    By how much does the speed of a vehicle moving in a straight line change each second when it is accelerating at 4 m/s2?
  79. physics

    8. Before you drop a ball held at a height of 5m with a weight of 20 N, what is its gravitational potential energy
  80. physics

    Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples.
  81. physics

    what is the speed of a ball after it has fallen freely from rest through a distance of 12 meters
  82. physics

    a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ?
  83. physics

    If a spring has a constant of 20N/m how much potential energy does it store if it is compressed 2m in joules? <3
  84. physics

    What average power is required for a runner with a mass of 80 kg to reach a speed of 8.2 m/s during a time of 1.8 s?
  85. physics

    4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30
  86. physics

    4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30?
  87. Physics

    Calculate the tangential speed of the earth around the sun (assuming a circular orbit).
  88. Physics

    A 1200 kg sports car accelerates from 0m/s to 27m/s in 10s. What is the average power of the engine?
  89. Physics

    a circuit contains a 9v battery and two 1 ohm bulbs. what is the voltage drop across each.
  90. physics

    What is the quantum particle of the electric field? Answer a. The proton. b. The electron. c. The photon. d. The neutron.
  91. Physics

    A 1300 sports car accelerates from rest to 90 in 6.5 . What is the average power delivered by the engine?
  92. physics

    does each of the two lenses used in a microscope produce a magnification of the object being viewed?
  93. physics

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

    Do i need to take precal and physics in highschool to become a nurse, dentist, or doctor?
  95. physics

    why does the filament of a bulb does not melt though it heats more than 3400 degree celcius
  96. physics

    --------------------------------------- A rugby player of mass 82kg is running at 6.0m/s. How much energy will be needed to stop him? ---------------------------------------
  97. Physics

    .17 kg hockey puck initial velocity 21 m/s stops 62m away. what is coefficient of friction?
  98. physics

    A rotating cylinder about 16 long and 6.2 in diameter what angular speed must it rotate?
  99. physics

    A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water. True or False
  100. PHYSICS

    Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.
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