What was the idea behind the black codes that limited civil rights in the south?

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal

56: 58 the assembly line was a system through which items were mass-produced in a flow.

What is george calvert's american colony