This shows you the differences between two versions of the page.
Both sides previous revision Previous revision | Next revision Both sides next revision | ||
demonstrations:4_thermodynamics:4f_entropy_and_the_second_law:glycerol_time_reversal:start [2019/04/17 19:10] demoroom |
demonstrations:4_thermodynamics:4f_entropy_and_the_second_law:glycerol_time_reversal:start [2019/04/17 19:19] demoroom |
||
---|---|---|---|
Line 1: | Line 1: | ||
- | ====== Glycerol Demo ====== | + | ====== Glycerol Time Reversal ====== |
- | {{tag>glycerol glycerine dye newtonian fluid needs_review untagged unlocated}} | + | {{tag> glycerol glycerine dye newtonian_fluid reversible_process thermodynamics unlocated}} |
<WRAP box right> | <WRAP box right> | ||
Line 11: | Line 11: | ||
===== Description ===== | ===== Description ===== | ||
- | After some dye has "dispersed" in the glycerol, the handle can be turned to make it all come back together. Displays a reversible processes in a highly viscous liquid. Classes Used: PHYS 153 | + | Consists of a pair of nested plexiglass cylinders with a cap on the top and bottom of the bigger cylinder, and a handle connected to the inner cylinder. There's a hole in the top that accesses the space between the cylinders, which is filled with glycerol. |
- | + | ||
- | + | ||
- | + | ||
===== Purpose ===== | ===== Purpose ===== | ||
+ | Displays an unusual example of a reversible processes in a highly viscous liquid. After some dye has "dispersed" in the glycerol, the handle can be turned to make it all come back together. With a reversible process, it's possible to turn back the hand of time. | ||
===== Apparatus ===== | ===== Apparatus ===== | ||
- | + | * Container with immersed cylinder and glycerol | |
- | glycerol with container, mixed dyes, syringe | + | * Syringes with dye |
- | + | ||
===== Setup ===== | ===== Setup ===== | ||
- | + | - Inject some dye into the container using the syringe. | |
- | + | - Turn the handle to disperse the dye. | |
- | 1. Inject some dye into the container using the syringe. | + | - Turn the handle in the opposite direction to reverse the dispersion effect. |
- | 2. Turn the handle to disperse the dye. | + | |
- | 3. Turn the handle in the opposite direction to reverse the dispersion effect. | + | |
- | + | ||
===== Notes ===== | ===== Notes ===== | ||
- | The handle can be turned a limited number of times before it is impossible to reverse the effect. Updated on: 06/12/13 | + | The handle can be turned a limited number of times before it is impossible to reverse the effect. Turning the handle with a jerky motion may inhibit the dye coming back together. |
<WRAP group> | <WRAP group> |