Do the following represent an equilibrium situation:

Question

1) A glass of iced tea still has sugar at the bottom after several minutes of stirring.

2) The student population at a high school remains constant for 5 years.

Answer 1

1. Could be yes, could be no. It depends upon --- can more sugar dissolve? If yes, then it isn't at equilibrium.
2. I think the intent is for this to be yes but I would answer no. Presumably some students are graduating while new students take their place so the number stays constant. To be strictly at equilibrium means that some students who have graduated could come back while other students drop out. But students who have graduated will not come back.