In Large Televisions,electrons Are Accelerated from Rest by a Potential

In large televisions,electrons are accelerated from rest by a potential difference of 20 kV and shot onto a phosphorescent screen to produce an image.What is the speed of the electrons when they reach the screen?

A) 1.4 * 10⁶ m/s
B) 1.3 * 10⁷ m/s
C) 4.4 * 10⁷ m/s
D) 5.9 * 10⁷ m/s
E) 8.4 * 10⁷ m/s