One result of wave refraction is that wave energy is concentrated .

Write skeleton equations for the following reactions c. aluminum(s)+copper(i) chloride(aq) > aluminum chloride(aq)+copper(s)

Which term describes a fracture in the earth at which land stays in the same place? a. joint b. fault c. split d. hinge

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage