Me with these exercises. i’ll give you 10 points

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

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

Coal contains energy. a. light b. kinetic c. chemical d. mechanical