Wind is realted to the movement of warm and cold air masses. which kind transfer does this represent?
a.) convection
b.) conduction
c.) radiation
d.) absorbption

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