👉 In physics, "unfrigidness" is a state of being without heat or other forms of thermal energy. It can be defined as an absence of temperature difference between two points in a substance due to its structure and composition. When a substance has no heat, it will remain at absolute zero degrees Celsius (0 Kelvin) regardless of the surrounding environment, thus becoming unfrigid. Unfrigid substances are often used in applications where high temperatures or extreme conditions are not desirable, such as in