heattoriamso heattoriamso
  • 08-11-2016
  • English
contestada

Which of the following is the best example of a closed system?
a car engine
our universe
a greenhouse
an insulated gas cylinder
i thought it was the greenhouse but wasn't sure

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syed514
syed514 syed514
  • 12-11-2016
A greenhouse- it is a glass building in which plants that need protection from cold weather are grown.
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