How to separate a mixture of iron ad copper pieces using an electromagent

Groups of organs that work together to complete a process in the body are called: a. cells b. tissues c. nerves d. systems

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

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