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, 65, pulls off rock star chic as she sings and plays guitar for real in movie with Jessie's Girl hitmaker Rick Springfield. The first look at Meryl Streep as a leather-clad rocker dropped Wednesday with the release of the first official trailer for the movie Ricki And The Flash.