Question: A helium nucleus (charge = 2e, mass = 6.63 x 10-27 kg) traveling at 6.20 x 105 m/s enters an electric field, traveling from point circled A, at a potential of 1.50 x 103 V, to point circled B, at 4.00 x 103 V.
Question 1: What is its speed at point circled B?
This is a physic question, reply as soon as possible. Thanks.