Which statement correctly compares electric charge with electric current? They both require a human to make them.
Neither require charged particles.
They both require a battery and a bulb.
They both require a movement of charged particles.

How is it possible for someone to put an ear to a wall and hear someone in the next room?     a.sound waves can travel though solids.    b.the waves travel from room to room via air.    c.there must be some air in the wall so the sound can travel through it.    d.sound waves change to electromagnetic waves and then back again.