Transcript: The third law of thermodynamics states that it’s impossible to remove all the heat from a physical system. At the temperature absolute zero there is no heat, and there is no atomic motion. So there would be no friction, and perfect machines with perpetual motion would be possible. This can never be achieved in the real universe. Imagine taking a cold gas. If you expanded it its temperature would cool further, and its molecular or atomic motions would reduce. But no matter how much you expanded it there would always be some motion because it would take an infinite amount of expansion to theoretically reduce it to absolute zero temperature.