The discussion revolves around determining the amount of helium required for a balloon to float, given the mass of the unfilled balloon and the densities of helium and air. Participants are exploring the principles of buoyancy and the relationship between the volume of helium and the forces acting on the balloon.
The discussion is active, with participants sharing their calculations and questioning the necessary conditions for buoyancy. Some guidance has been offered regarding the relationship between the densities of helium and air, and how to approach the calculations, but there is no explicit consensus on the next steps.
Participants are navigating through the constraints of the problem, including the need to understand buoyancy and the implications of replacing air with helium in the balloon. There is a focus on the calculations needed to determine the volume of helium required to lift the mass of the balloon shell.
Miri said:When it has 1.2g helium in it. But I don't know how I can calculate this...
Miri said:I don't know what the conditions are. I just know that it has to float. And why do we need a net force? And how would we calculate it? Thx for your patience
Miri said:So the volume needed to lift the mass of the balloon shell itself is calculated like this: 7.5*10^-3kg / 1.29kg/m^3=0.006m^3. But what's the point now? Should I calculate 7.5*10^-3kg / 0.18kg/m^3=0.04m^3 and then??