The speed of a car increases from 2.5 meters per second to 9.0 meters per second in 3.0 seconds as it accelerates uniformly. What is the magnitude of the acceleration of the car during this 3.0-second interval?

When you turn on a battery-operated device, an electrical circuit is

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

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