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How close have we gotten to absolute zero?

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Final answer:

Absolute zero is the temperature at which all molecular motion ceases. Although it is possible in theory, it has never been reached in practice. The lowest temperature achieved was 1.0 × 10-10 K.

Step-by-step explanation:

Absolute zero is the temperature at which all molecular motion ceases. Although absolute zero is theoretically possible, it has never been reached in practice. The lowest temperature ever achieved in a laboratory experiment was 1.0 × 10-10 K at Helsinki University of Technology in 2008.

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