A vector remains unchanged O if it is moved in any direction.
O only if it is moved parallel to its original direction.
O only if it is rotated perpendicular to its original direction
O only if it is not moved.

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