jbeno23
contestada

Which of the following is the best example of a closed system?

a. a car engine
b. our universe
c. a greenhouse
d. an insulated gas cylinder

Respuesta :

Astute
Based on my information, this would be known to be a "green house" as this, would be as it would be a house known for planting, and etc. But the main part that I wanted to consider would be the fact that it would also be a "closed system" as you would be able to open and close this kind of machine.

Your answer: a greenhouse
a greenhouse 
all others are wrong