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.
Streep began her career on the New York stage in the late 1960s and appeared in several Broadway productions, including a 1977 revival of the Anton Chekhov drama The Cherry Orchard. Meryl Streep broke into films in the 1970s with a role in the 1977 drama Julia. The next year she appeared in The Deer Hunter opposite Robert De Niro and Christopher Walken, for which she earned her first Academy Award nomination for best supporting actress.