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.
Meryl Streep is the worldâs greatest actress. If she werenât, Ricki and the Flash would be just another disappointing, pedestrian, predictable August release. The movieâs marketing and trailer are a bit misleading. They give the impression Streepâs Ricki is a fading rock star whoâs estranged from her family.