With participation level at nearly a quarter of the population (22 percent), bowling rolled by such popular sports and activities as basketball (15 percent), golf (13 percent), aerobics (11.9 percent), baseball (13 percent) and yoga (9 percent) to secure the number one ranking.
Definition of FUEL CELL. : a device that continuously changes the chemical energy of a fuel (as hydrogen) and an oxidant directly into electrical energy.
A fuel cell is a device that converts chemical potential energy (energy stored in molecular bonds) into electrical energy. A PEM (Proton Exchange Membrane) cell uses hydrogen gas (H 2) and oxygen gas (O 2) as fuel. The products of the reaction in the cell are water, electricity, and heat.