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.
Mary Louise Streep (born June 22, 1949), known professionally as Meryl Streep, is an American actress. Cited in the media as the best actress of her generation, Streep is particularly known for her versatility and accent adaptation. Nominated for a record 21 Academy Awards, she has won three.