How Fuel Cells Work. Polymer Electrolyte Membrane (PEM) fuel cells used in automobilesâalso called Proton Exchange Membrane fuel cellsâuse hydrogen fuel and oxygen from the air to produce electricity. The diagram and animation below show how a PEM fuel cell works.
Sound is what happens when you transmit vibrations of energy through that matter. Sound is made up of wave vibrations. When you talk aloud, the motion of your vocal cords causes the air to vibrate. Air is made up of molecules, and as those air molecules vibrate, they hit each other.
Sound energy. Sound is the movement of energy through substances in longitudinal (compression/rarefaction) waves. Sound is produced when a force causes an object or substance to vibrate â the energy is transferred through the substance in a wave.Typically, the energy in sound is far less than other forms of energy.Let's see this illustration. A vibrating drum in a disco transfers energy to the room as sound.ound is produced when a force causes an object or substance to vibrate â the energy is transferred through the substance in a wave. Typically, the energy in sound is far less than other forms of energy. Let's see this illustration. A vibrating drum in a disco transfers energy to the room as sound.