In a television picture tube, electrons are fired?
In a television picture tube, electrons are fired the length of the tube to strike the screen & cause a tiny glow, with which the picture is created. The tube is about 30 cm long, and the electrons travel at about 2×10^8 m/s (2 times 10 to the eighth power). How long does it take an electron to make the trip?
AND PLEASE SHOW ME THE STEPS TO SOLVING THEM (equations, etc.) THANKS!!!! 
)
after being accelerated by an electric field up to a speed V their motion is uniform and so the relationship between V, the travelled distance L and the time t during which it is achieved are related by
V=L/t
t=L/V=30*10^-2/2*10^8 seconds
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