Help me with counting atoms

What are igneous intrusions and extrusions

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

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