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 role also gave Meryl the opportunity to share the screen with her daughter for the first time since 1986's Heartburn, when Grummer was just 20 months old. A true family film, Ricki and the Flash hits theaters Aug. 7. Before she was one of the most acclaimed actresses in the world, Streep was told she wasn't pretty enough for King Kong. If you can't believe it, check out the video below.