Hydrogen, helium, ammonia, methane, neon, coal gas and pure nitrogen are all lighter than air. A pocket of air can be made lighter than the surrounding air by heating it. Continue Reading.
Related Questions. 1  Do 2015 Jeep Wrangler Sports have back air vents 1 answer I recently bought a 2015 Jeep Wrangler Sport and I am not sure if it has back air vents or not... If it does I can't seem to find them.
This newcomer bills itself as a homeland security company rather than a car company, which explains the E7's copious seating space (40 inches of legroom), and rear-hinged rear doors, which make it easier to get uncooperative passengers in and out.