***20 points*** what statements best describes x-rays? check all that apply. 1. x-rays are electromagnetic waves. 2. x-rays are longitudinal waves. 3. x-rays are mechanical waves. 4. x-rays are transverse waves. 5. x-rays travel at the speed of light. 6. x-rays travel at the speed of sound.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

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

Properties seen when one one substance changes to another are known as properties