A piece of equipment containing a spring that is used to measure force

Argon, neon, and xenon are examples of

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.

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine