The temperature of −273.15°C is called _________.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. absolute zero temperature.
The temperature of −273.15°C is called absolute zero temperature, the lowest possible temperature in nature. At this point, the motion of all particles theoretically comes to a complete stop, and a substance has minimum internal energy. Absolute zero is equivalent to 0 Kelvin on the Kelvin scale, which is the SI unit of temperature used in scientific measurements. It serves as the starting point for the Kelvin temperature scale. Absolute zero is a fundamental concept in thermodynamics and is used in fields like physics and chemistry to understand the behavior of matter at extremely low temperatures, such as in cryogenics.