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No system is completely closed off from its surroundings. Which represents a system that is almost completely closed?

Aa wood-burning fireplace
Ba washing machine
Ca capped soda bottle
Da pot of boiling water

I thinks its

C

Verified Answer :

I agree: a capped soda bottle has very limited contact with the surroundings, as it has to be relatively closed so that the gas bubbles don't escape.

The remaining options have contact either with air (A and D) or with water from the outside (B)

Tok

Answer:

I honestly also think its C.

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