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.
The event, cohosted by the puckish Alan Cumming and the recently ordained Universal Life Church reverend John Cameron Hedwig Mitchell, will feature performances by indierock legend Bob Mould, hipster faves Sleater-Kinney and Le Tigre, and appearances by Sandra Bernhard and Margaret Cho.