Asmart phone charger delivers charge to the phone, in the form of electrons, at rate of -0.75 c/s. how many electrons are delivered to the phone during 45 min of charging?

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