Please give written solutions and scanned answer to the questions.
A proton with an initial speed of 600,000 m/s is brought to rest by an electric field. What was the potential difference that stopped the proton? What was the initial kinetic energy of the proton, in electron volts?
What is the value of a charge if taken from 300 V , to 170 V , takes 4.9×10-4 J of work.?