Arianna is experimenting with different materials to see which one will transmit sound the fastest. Through which of the following materials will sound waves
travel the fastest?

Water

Oil

Concrete

Air

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