Acharge q is placed on the x axis at x = +4.0 m. a second charge q is located at the origin. if q = +75 nc and q = −8.0 nc, what is the magnitude of the electric field on the y axis at y = +3.0 m?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.