11.10.PROJECTS 351 % 5 25 20 0 5 10 15 20 25 30 Figure 11.11:After 2000 time steps,73 molecules have stuck to the cold wall in the cold trap and27 are still“free”.11.10. PROJECTS 351 −1 0 1 2 3 4 5 6 5 10 15 20 25 30 5 10 15 20 25 30 Figure 11.11: After 2000 time steps, 73 molecules have stuck to the coldwall in the cold trap and27 are still “free