What is the period of a wave with a wavelength of 8 cm and a frequency of 0.5 hertz?(1 point) 0.125 seconds

2 seconds

4 seconds

0.0625 seconds

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