DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
4F10.00 | Entropy | | |
4F10.10 | time reversal | PIRA 500 | |
4F10.10 | time reversal | 4F10.10 | An ink column in glycerine between two concentric rotating cylinders appears to mix and unmix. |
4F10.10 | unmixing demonstration | AJP 28(4),348 | The area between coaxial cylinders is filled with a Newtonian fluid and a suitable tracer. When the inner cylinder is rotated, the tracer appears to be mixed but is distributed in a fine one armed spiral sheet. Reversing the direction of inner cylinder rotation will cause the original tracer pattern to reappear. |
4F10.10 | order and disorder | Hm-2 | Ink seems to be mixed in glycerine but can be unmixed. |
4F10.10 | un-mixing | Disc 13-08 | Glycerine between two concentric cylinders. Animation. |
4F10.11 | capacitor charging entropy change | AJP 54(8),742 | A simple demonstration-experiment that measures the difference in change of temperature due to charging a capacitor in many steps or one step. |
4F10.20 | balls in a pan | PIRA 1000 | |
4F10.20 | balls in a pan | 4F10.20 | Three red balls and three yellow balls are mixed in a pan. |
4F10.25 | communication time and entropy | AJP 41(11),1284 | Demonstrate entropy with the time it takes a student to communicate the structure of ordered and disordered playing cards, and a salt crystal model, etc. |
4F10.30 | Hilsh tube | PIRA 500 | |
4F10.30 | Hilsh tube | 4F10.30 | |
4F10.30 | Hilsch tube | Hm-3 | The Hilsch tube is a sort of double vortex that separates hot and cold air. |
4F10.40 | dust explosion | PIRA 500 | |
4F10.40 | dust explosion | 4F10.40 | |
4F10.40 | dust explosions | Hm-1 | Disperse dust in a can with a squeeze bulb and use a spark to set off the explosion. |
4F10.40 | dust explosion | 26-4.5 | Blow a teaspoon of lycopodium powder into a covered can that contains a lighted candle inside. |
4F10.40 | dust explosion | Disc 14-15 | Blow lycopodium powder into a can containing a candle. |
4F10.45 | gas explosion | 26-4.6 | Fill a can that has a hole on top and bottom with illuminating gas and light the top hole. The flame burns low and then the can explodes. |