The study of the evolution and the mind using principles of natural selection is evolution

Observations show that interstellar clouds can have almost any shape and

The energy produced as a result of this flow of electrons from atom to atom is called

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