Which of these factors is part of your social environment

Which composition of water moves to begin a deepwater current?

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

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.