Question

What are two examples of a closed system?

Answer 1

Answer:

Let us take simple examples. A closed system allows only energy transfer but no transfer of mass. Example: a cup of coffee with a lid on it, or a simple water bottle. An open system is one which can allow mass as well as energy to flow through its boundaries, example: an open cup of coffee.

Answer 2

Example 1.: a cup of coffee with a lid on it.

Example 2.: a simple water bottle.

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