McqMate
| Q. |
An open system |
| A. | Is a specified region where transfers of energy and/or mass take place |
| B. | Is a region of constant mass and only energy is allowed to cross the boundaries |
| C. | Cannot transfer either energy or mass to or from the surroundings |
| D. | Has a mass transfer across its boundaries, and the mass within the system is not necessarily constant |
| E. | None of the above |
| Answer» D. Has a mass transfer across its boundaries, and the mass within the system is not necessarily constant | |
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