1. The problem statement, all variables and given/known data Hi everyone, This is a conceptual question, so there are no variables, per se. I'm trying to figure out how to calculate the velocity at which methane would rise into the atmosphere when released on the ground. Density of air: 1.225kg/m^3 Density of methane: 0.717kg/m^3 2. Relevant equations Unknown, intuitively I feel it should be based on buoyancy. 3. The attempt at a solution I've tried using the buoyancy approach, but since I would imagine the cloud could be any size, there is no way to use volume as a variable. The only method I can think of is to use the ratio of the densities of the atmosphere and methane, both of which are known constants, but I'm not quite sure how to go about doing this. This is my first post, so I apologize if I've made any template errors. Thanks!