Experiment of December 23, 2019:
The time to submit an answer is over. You can now view the solution of the experiment.
Which roll arrives first at the bottom?
A) The closed roll arrives at the bottom first.
B) The open, unravelling roll arrives at the bottom first.
C) Both rolls arrive at the bottom at the same time.
D) The opened roll gets stuck on the way and does not arrive at all.