Older televisions display a picture using a device called a cathode ray tube, where electrons are emitted at high speed and collide with a phosphorescent surface, causing light to be emitted. the paths of the electrons are altered by magnetic fields. consider one such electron that is emitted with an initial velocity of 2.20 107 m/s in the horizontal direction when magnetic forces deflect the electron with a vertically upward acceleration of 5.60 1015 m/s2. the phosphorescent screen is a horizontal distance of 6.1 cm away from the point where the electron is emitted. (a) how much time does the electron take to travel from the emission point to the screen? s (b) how far does the electron travel vertically before it hits the screen?
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An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?
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Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?
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Older televisions display a picture using a device called a cathode ray tube, where electrons are em...
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