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. Mary Louise Meryl Streep (born June 22, 1949) is an American actress and philanthropist. Cited in the media as the best actress of her generation, â a designation to which she objects â Streep is particularly known for her versatility in her roles, transformation into the characters she plays, and her accent adaptation.