Which discribes what a velocity/time graph would look like with no accelaration

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Sound is a disturbance that travels through a medium as a

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up