What technological advances lead to the downfall of both medieval African and American civilizations?

What is the chemical symbol of the element located in the 5th period that naturally occurs as a diatomic solid?

On a supply and demand graph, equilibrium is the point where the two curves meet. the supply curve begins. the supply curve ends. the demand curve ends.

The zealots were for a: the teaching of jesus b: temple and sacrifices c: faith and law d: the military overthrow of roman rulers h.e.l.p asap i'm taking a test