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In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.40 x 10^-17 N during the first 4.30
In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.40 x 10^-17 N during the first 4.30 cm of the tube's length; then they move essentially constant velocity another 45.0cm before hitting the screen.
Find the speed of the electrons when they hit the screen. m/s
How long does it take them to travel the length of the tube? ns
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