PLEASE HELP Two seventh grade students are riding in a car and listening to music on the radio.
How would the students increase the amplitude of the sound waves of the music?

Which statement below best explains the main goal of manifest destiny during the 1800's? a to create an alliance between the united state and the mexican empire b to expand america's borders across the entire north american continent c to remove native americans from the united states' territory completely d to move settlers north of the great lakes to claim land from great britain