Final answer:
The distinct position of large combined balloons is influenced by the buoyancy created by the hot air inside being less dense than the cool air outside, and properties such as the helium effusion rate affecting balloon deflation.
Step-by-step explanation:
The distinct position of the large balloons when five balloons were combined relates to the buoyancy and density concepts in physics. According to the given reference materials, the hot air inside these balloons is less dense than the surrounding cool air, leading to a buoyant force that causes them to rise when their guy lines are untied.
Observing the properties of these balloons, one filled with helium and the other with argon, reveals that helium, being a lighter gas, will cause the balloon to deflate more quickly due to its higher effusion rate. The pressure of the gas in a hot-air balloon is designed to be roughly the same as the atmospheric pressure outside the balloon to provide sufficient lift while ensuring the structural integrity of the balloon.