What did passage of the Immigration Act of 1965 accomplish?
The law did away with limits on immigration from Asian nations.
The law allowed no more immigration from European nations.
The law supported victims of political persecution.
The law made an effort to establish a quota system.

Positrons are spontaneously emitted from the nuclei of

What’s #16 asking me and how do i solve it?

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.