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.
Big, small, it doesn't matter. What matters is the music. I've heard tiny speakers that kill, I've heard large speakers that are garbage, and visa versa. Duh, SIZE does NOT matter-only truth matters. Compare a Totem Acoustics Mani-2 to a Maggie 20.