Hydrogen can also serve as fuel for internal combustion engines, but unlike with fuel cells, will produce tailpipe emissions and is less efficient. Learn more about fuel cells. The energy in 2.2 pounds (1 kilogram) of hydrogen gas contains about the same as the energy in 1 gallon of gasoline. Because hydrogen has a low volumetric energy density, additional steps are needed to store enough hydrogen onboard fuel cell vehicles to achieve the driving range of conventional vehicles.
Wiktionary (0.00 / 0 votes) Rate this definition: zeppelin (Noun) A type of large German dirigible airship of the early 20th century designed to carry passengers or bombs. Zeppelin (ProperNoun) A German manufacturing company, famed for building the zeppelin airships. Origin: Named after Ferdinand, Count von Zeppelin.
Lantern (noun). a smaller and secondary cupola crowning a larger one, for ornament, or to admit light; such as the lantern of the cupola of the Capitol at Washington, or that of the Florence cathedral. Lantern (noun). a lantern pinion or trundle wheel.iktionary (0.00 / 0 votes) Rate this definition: lantern (Noun). A case of translucent or transparent material made to protect a flame, or light, used to illuminate its surroundings. Origin: Middle English (13th century), via Old French lanterne from lanterna, itself a corruption of.