Answer:
Velocity of electron will be equal to 
Explanation:
We have given kinetic energy of electron 
Mass of electron 
We have to find velocity of electron
Kinetic energy of electron is equal to
, here m is mass and v is velocity
So 

So velocity of electron will be equal to 
The longer the lever the longer the power
Answer:
84
Explanation:
use d= (vi+vf/2)t to solve goodluck <3
The answer is positive charge.