physics please HELP !

74,851 results, page 62
  1. physics

    what is the kinetic energy of a 3 kg 20 cm diameter bowling ball with a linear velocity of 4m/s? (rolling and spinning)
  2. physics

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

    How much potential energy does DeAnna with a mass 57.0 kg, gain when he climbs a gymnasium rope a distance of 3.7 m?
  4. physics

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

    My teacher needs us to formulate a question for the science fair. Till now, we have only learned the Kinematics equations, HELP, please....
  6. Physics-VECTORS

    Find the vector's magnitude and direction. Part A A⃗ = 4 i^− 8 j^ A =? θA =?
  7. Physics

    How Fast would a satellite have to move to stay in an orbit 300 miles above the Earths surface?
  8. physics

    What is the longest wavelength for standing waves on a 238.0 cm long string that is fixed at both ends?
  9. physicS

    What is the longest wavelength for standing waves on a 238.0 cm long string that is fixed at both ends?
  10. Physics

    i have to build a enery effiecient vehicle for class and do a opapp paper and i need help im so confused.... any ideas?
  11. physics

    What is the magnitude of the momentum of a car weighing 1,555 N when it is moving at a speed of 23 m/s? Express your answer in kg m/s.

    what is the central acceleration of an automobile driving at 40 kph on a circular tracks having radius of 30m?
  13. 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?
  14. physics

    i want a simple laboratory method of determining a young modulus of a long thine wire
  15. Physics

    What is the gravitational force between the proton (1.67X10^-27 kg) and the electron (9.11X 10^-31 kg) in a hydrogen atom if they are 3.00X10^-10 m apart?
  16. physics

    find the mass of the moon if its radius is 1.76*1000000 m and the average density is 4*1000kg/m cube
  17. Physics

    Inside a metal conductor, why is it not possible to have a static charge configuration if there is a net electric field?
  18. physics URGENT

    3. Using conceptual meaning of g = Fg/m [N/kg], answer the following: a) What does the spring scale read on the surface of the Moon?
  19. physics

    state the energy hans-formation which occurs when a car is brought to rest by its break

    Two long, parallel wires separated by 90 each carry currents of 2.0 in a horizontal direction.
  21. physics

    If wind blows at 44 m/s over a house, what is the net force on the roof if its area is 180 m^2 and is flat?
  22. physics

    if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?
  23. PHYSICS!!!

    By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?
  24. physics

    How much heat is needed to convert 1.0kg ice at -5celsius to steam at 105 celsius?
  25. Physics

    A player kicks a footbal with a velocity of 27 m/s at an angle of 31° with the ground. How high does the ball travel?
  26. 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?
  27. physics

    if a car moving 180km/h reduces to 72km, what is the percentage change in kinetic energy?
  28. physics

    What is the longest wavelength for a standing wave, in the same length tube, that is open at one end and closed at the other?
  29. Physics

    A student walks from her apartment a distance d=139m to the bus stop at a speed of v1= 1.40m/s.
  30. Physics

    1. Could a horizontal axis of rotation be used satisfactorily in an experiment uniform circular motion? Explain
  31. Physics

    How much force is needed to hold a nearly weightless but rigid 1-L carton beneath the surface of water?
  32. physics

    calculate the friction force of an object? if weight=19600,vi=30ms-1,vf=0ms-1 and S=100m.
  33. Physics

    An object 6.70 cm high is placed 15.1 cm in front of a convex mirror with radius of curvature of 8.55 cm. Where is the image formed?
  34. physics

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

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

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

    if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?
  38. physics

    if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?
  39. physics

    An argon atom has a mass of 6.64 x 10 kg has 5.5x108 joules of kinetic energy. At What velocity is it moving?
  40. Physics

    What is the frictional force between the tires of a 2000 kg car and an asphalt road if the coefficient of friction is 1.2?
  41. Physics

    A train can deccerate at 0.4 m/s. It's traveling at 160km/hr. How far in advance should it apply brakes to come to a full stop.
  42. Physics

    A boy sledding down a hill accelerates at 1.55 m/s2. If he started from rest, in what distance would he reach a speed of 6.90 m/s?
  43. physics

    Find the minimum kinetic energy needed for a 3.7×104-kg rocket to escape the Moon.
  44. physics

    What is the frequency of the EM wave emitted most strongly by a glowing element on a stove with temperature 1,500 K
  45. AP Physics

    What is the minimum work needed to push a 1025 kg car 290 m up a 17.5° incline with zero friction?
  46. Physics

    How much time does it take for a car to come to rest if it has an initial speed of 22m/s and slows with a deceleration of 6.1 m/s^2 Will my answer be 3.6 m/s^2
  47. Physics

    How much time does it take for a car to come to rest if it has an initial speed of 22m/s and slows with a deceleration of 6.1 m/s^2 Will my answer be 3.6 m/s^2
  48. physics

    a term is related as at=bt2 + ct3 +d,if 'a' has dimension of power,find the dimention of 'b','c' and 'd'......'t' is the time
  49. physics

    What is the force required to move a 22kg ccrate up an incline of 35 degrees, if the coefficient between the two surfaces is .30?
  50. physics

    How does one go about solving this? A skateboard rider starts from rest and accelerates at a constant +.50 m/s^2 for 8.4s. What is the riders displacement?
  51. physics

    on a planet whose mass is twice that of earth and whose radius is same, with what acceleration will a body fall at sea level?
  52. physics

    A car comes to rest uniform deceleration at the rate of 5.8 m/s2 for 14.3 seconds. What is distance did it travel during this time??
  53. physics

    WHAT IS THE REASON BEHIND THE JISKHA"S TEACHERS TO BE NOTHING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!(except Writeacher and STEVE) ARE THEY DAFT OR NUISANCE!!!!!!!!!!!!!!!!!! ANSWWER Me QUICKLY !!!!!!!!!!!!!
  54. physics

    Doubling the frequency of a wave source doubles the speed of the waves. ( True or False)
  55. physics

    Two objects attract each other gravitationally with a force of when they are 0.25 m apart. Their total mass is 4.00 kg. Find their individual masses
  56. physics

    A body immersed in liquid has an upthrust of 140N with a density of 12kg calculate the velocity
  57. physics

    What is the magnification of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? Choose one answer. a. 0.33 b. -0.33 c. 1.33 d. -1.33
  58. physics

    A boy sledding down a hill accelerates at 1.20 m/s2. If he started from rest, in what distance would he reach a speed of 7.00 m/s?
  59. physics

    A boy sledding down a hill accelerates at 1.20 m/s2. If he started from rest, in what distance would he reach a speed of 7.00 m/s?
  60. Physics

    what is the correct equation to use to find the velocity of the center of mass of a cylinder after it rolls down a hill
  61. physics

    a 5kg suitcase slides 2m down a frictionless ramp incline at 45 degress. How fast is it going at the bottom?
  62. physics

    suppose a ball thrown downward with initial velocity 3 m/s instead of being dropped a)what then would be its position after 1s and 2s ? b)what would its speed be after 1 s and 2 s ?
  63. physics

    the mathematical form of the thin-lens equation predicts that a graph of 1/p vs 1/q should have a slope of -1, explain?
  64. Intro to Physics

    With scanning probe microscopy technology, we see not actual atoms but rather images of them. Explain.
  65. Physics

    What is the maximum circular speed the astronaut can have before he breaks free of gravity and goes drifting off into space?
  66. Physics

    What is the gravitational force between two identical 4,500 kg asteroids whose centers of mass are separated by 120 m?
  67. physics

    A commuter backs her car out of her garage with an acceleration of 1.6 m/s2. How long does it take her to reach a speed of 2.3 m/s in seconds
  68. Physics

    A stone is thrown vertically upward with a speed of 19.0m/s How fast is it moving when it reaches a height of 10.0m
  69. physics

    what is meant by the change go temperature of 1 degree celcius on the scale of a plantinum resistance thermometer
  70. Physics

    A car travels in a straight line for 4 h at a constant speed of 63 km/h. What is its acceleration? Answer in units of m/s^2?
  71. Physics.

    when an e- and a positron collide they're annihlated and their mass converts to engery. the energy released is? [1.64x10^-13 J]
  72. Physics/Math

    The equation describing the motion of an object is y=0.8cos(4.2t+0.32). What is its period? I don't know how to figure this out?
  73. physics

    Find the field produced by a uniformly charged sheet carrying 93pC/cm2 .
  74. jru-physics

    what potential energy is acquired by a block of steel whose mass is 50 kg when it is raised 200 cm?
  75. maths lit,physics,life science n tourism

    i don't know which career to choose can you help me ?I'm doing grade 11.
  76. Physics

    How long does it take T-Rex to reach its food 200m away assuming that he starts from rest and accelerates at 4.00 m/s2?
  77. Physics

    Your friend of mass 150 can just barely float in fresh water. Find her volume.
  78. physics

    a racing car has a uniform acceleration of 4ms-2. what distances will it cover in 10s after start?
  79. Physics

    A ball rolls off the edge of a balcony at 8.0 m/s. Find its speed after 3.8 s in the air. Use g = 10. m/s2 and enter m/s as unit.
  80. physics

    What is the period of the hand on a clock that measures the minutes? What is the frequency? Please show work, Thank you, Abbie
  81. Physics

    What is the car's forward acceleration,at a speed of 30m/s,when the driving force on the wheels is 650N
  82. physics

    how many revolutions per minute would a 15 m ferris wheel need to make for passengers to feel weightless at the top?
  83. physics

    calculate the work done on n mole of a vander waal gas is an isothermal expansion from volume vi to vf.
  84. physics

    If acoin roll at 1.5m/s and later rolls at 4.5m/s with an acceleration of 2 meters per squared second how long will it take to come to a stop, how far will it travel?
  85. physics

    Describe how the energy from a rotating flywheel can be transferred to moving parts of a child's toy.
  86. physics

    An equipotential surface that surrounds a point charge q has a potential of 516 V and an area of 1.01 m2. Determine q
  87. Science: physics

    Why does the moon not require a push to keep it along its orbit around the earth? -I have to use Newton's first law of motion.
  88. Physics

    A 200kg motorcycle is driving in a circular path at 1 rev per 5 seconds and the circle has r=12m
  89. physics

    the period of revolution of a satellite is 90 min. Find the radius of the orbit assuming an acceleration of 9.8 m/s/s.
  90. physics

    how much heat must be added to 4.00 kg of aluminum to cause its temperature to rise from 22 degrees C? unit of answer must be joule
  91. physics

    A helicopter blade spins at 110 revolutions per minute. Its tip is 5.50 m from the center of rotation.
  92. physics

    what is the magnitude and direction of the electric field 20.0 cm directly above an isolated 33.010 neg6 C charge?
  93. Physics

    Find the pressure exerted by a waterbed with dimensions of 2m x 2m which is 30 cm thick. (hint:use density of water)
  94. physics

    calculate the linear momentum of a truck with a mass of 13065kg that is traveling at 36m/s eastward.
  95. Physics

    What exerts the force obn a rocket in outer space to make it move forward?
  96. Physics

    If a bullet was fired straight up at a speed of 30 m/s, what would be the total time for it to return to its starting point?
  97. College Physics

    How much would you have to raise the temperature of a copper wire (originally at 20 ∘ C) to increase its resistance by 30% ?
  98. physics

    Consider a pair of planets for which the distance between them is decreased by a factor of 5. Show that the force between them becomes 25 times greater.
  99. physics

    Power applied to a particle varies with time as P=(3t^2-2t+1)W. Find the change in kinetic energy between t=1s and 4s.
  100. physics

    a 10,000hg car rounds a curve of radius 1200ft at 50mph what is its centripetal acceleration?