8. You turn off the water flowing into the tube and open the drain. This is an example of
A. a closed system
B. an open steady-state system
C. an open unsteady-state system
D. none of the above
8. You turn off the water flowing into the tube and open the drain. This is an example of
A. a closed system
B. an open steady-state system
C. an open unsteady-state system
D. none of the above