What is the speed of impact of electrons with the screen of the picture tube? Answer in units of m/s.
Electrons are accelerated through a potential difference of 15500 V
Charge of electron: 1.6 x 10^-19 C
Mass of electron: 9.11 x 10^-31 kg
Energy of electrons when they hit the screen: 2.48E-15 J
K = .5mv^2
The Attempt at a Solution
I tried using that equation, I made it 15500 = .5mv^2 ... obviously plugging in the above numbers for m and v.
Computer said the answer was wrong.