A helium nucleus (charge = 2e, mass = 6.63 10-27 kg) traveling ...

[misspop]

A helium nucleus (charge = 2e, mass = 6.63  10-27 kg) traveling at 6.20  105 m/s enters an electric field, traveling from point A, at a potential of 1.50  103 V, to point B, at 4.00  103 V. What is its speed at point B?
  1.7.91  105 m/s
  2.3.78  105 m/s
  3.2.13  105 m/s
  4.2.52  106 m/s
  5.3.01  108 m/s

Question 2

When referring to wave motion, what is the meaning of the expression out of phase?

[ultraflyy23]

Answer to Question 1

2

Answer to Question 2

Out of phase refers to the position of the vibrating particle's displacement from its
equilibrium position relative to another particle's displacement when two waves meet
out of phase the crests of one wave coincide with the troughs of the other.