Homework Help: physics

Posted by john on Monday, April 12, 2010 at 10:22pm.

what kinetic energy does an electron acquire if it falls through a potential difference of 21,000 volts in a TV picture tube? How long will it take for that electron to travel from the "gun" end of the tube to strike the other end of the tube and create a light signal if the tube is 14" long?

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