a. Divide a vessel of capacity V into two identical parts 1 and 2. Let one molecule move in this vessel. We will observe it during the time τ. On average, half of this time the molecule will be in part 1 of the vessel, and half in part 2. How long will the second molecule stay in part 1 together with the first one, if two molecules are moving in the vessel?
b. There are three molecules moving in the vessel. How long will they be in Part 1 at the same time?
c. There are N molecules moving in the vessel. How long will they be in Part 1 at the same time?