Which describes laptops, cell phones, and video game systems that people use every day? obsolete technologies current technologies emerging technologies coexisting technologies

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change.

Which muscle is responsible for inhalation ?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point