Question

Which are open systems?

Check all that apply.
A. A lightbulb
B. A basketball court
C. A plastic bag
D. A cup of water

Answer 1

D

Answer 2

I would argue B as well, unless the court is enclosed by a structure so that it doesn't transfer energy or matter with the outside world. Maybe like Kobe Bryant's private basketball court built completely underwater with its own air filtration system.