If a person eats a steak (from a cow) the person is acting like
a.) a primary producer
b.) a primary consumer
c.) a secondary consumer
d.) a tertiary consumer
e.) a quaternary consumer

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