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Cold refers to a weather condition marked by low temperatures. Temperature itself is a measure of hotness or coldness, indicating the direction of heat energy flow. The lowest possible temperature is absolute zero, theoretically characterized by the complete absence of heat and motion, equivalent to -273.15°C or -459.67°F.123

Cryogenics is the field dedicated to producing and applying low-temperature phenomena, generally defined as temperatures between -150°C (-238°F) and absolute zero. At these extreme conditions, material properties like strength and electrical resistance change significantly.4

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