The balloon will float until the density of its gas equals the density of the surrounding air. The density of the air decreases as altitude increases; because of gravity; gas molecules are more sparse at higher elevations. The air is thinner at high altitudes.
The latest big moment came when he landed the part of Meryl Streepâs bandmate and lover in director Jonathan Demmeâs new film, Ricki and the Flash, which opens Friday (Aug. 7). Meryl Streep Covers Gaga, Springsteen, Petty for New Film, 'Ricki and the Flash'. And it almost didnât happen.
Rick Springfield tells USA TODAYâs Bryan Alexander about acting and playing music with 'Ricki and the Flash' co-star Meryl Streep. Robert Hanashiro, USA TODAY. 'Ricki and the Flash' star Rick Springfield, photographed before playing a private concert for fans aboard the cruise ship Entertainer.