Question
Multiple Choice Question A system that allows mass to flow in or out is called: an open system. an isolated system. a closed system. Need help?Review these concept resources.
Answer
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Zachariah
Master · Tutor for 5 years
Answer
A. an open system.
Explanation
An open system is one that allows both energy and mass to flow in and out of the system. This is in contrast to a closed system, which allows only energy transfer, and an isolated system, which does not allow either mass or energy transfer.