What is the meaning of Superfluous?

Superfluid Helium. #helium #fluid #superfluid #antigravity #Science #knowledge #scientists #chemistry #chemical #stali | S T Ali

When helium is cooled to extremely low temperatures, specifically around 2.17 Kelvin, it undergoes a remarkable phase transition and becomes a superfluid. In this state, helium exhibits extraordinary properties that defy classical physics. The most striking feature of superfluid helium is its zero viscosity, meaning it can flow without any resistance. This transformation is not just a physical curiosity—it is a profound manifestation of quantum mechanics on a macroscopic scale. Unique Properties