Physics equations/19-Electric Potential and Electric Field/Q:KE&PE


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A
{How fast is a 2642 eV electron moving? +a) 3 x 107 m/s. -b) 4.6 x 107 m/s. -c) 6.9 x 107 m/s. -d) 1 x 108 m/s. -e) 1.5 x 108 m/s.
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{A proton is accelerated (at rest) from a plate held at 45.3 volts to a plate at zero volts. What is the final speed? -a) 2.8 x 104 m/s. -b) 4.1 x 104 m/s. -c) 6.2 x 104 m/s. +d) 9.3 x 104 m/s. -e) 1.4 x 105 m/s.
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{What voltage is required accelerate an electron at rest to a speed of 9.4 x 106 m/s? -a) 7.4 x 101 volts -b) 1.1 x 102 volts -c) 1.7 x 102 volts +d) 2.5 x 102 volts -e) 3.8 x 102 volts
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{What voltage is required to stop a proton moving at a speed of 8.5 x 104 m/s? -a) 7.4 x 100 volts -b) 1.1 x 101 volts -c) 1.7 x 101 volts -d) 2.5 x 101 volts +e) 3.8 x 101 volts
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