PIRA 4F10.00 ENTROPY

DCS #DEMONSTRATIONREFERENCEABSTRACT
4F10.00Entropy
4F10.10time reversalPIRA 500
4F10.10time reversal4F10.10An ink column in glycerine between two concentric rotating cylinders appears to mix and unmix.
4F10.10unmixing demonstrationAJP 28(4),348The 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.
4F10.10order and disorderHm-2Ink seems to be mixed in glycerine but can be unmixed.
4F10.10un-mixingDisc 13-08Glycerine between two concentric cylinders. Animation.
4F10.11capacitor charging entropy changeAJP 54(8),742A simple demonstration-experiment that measures the difference in change of temperature due to charging a capacitor in many steps or one step.
4F10.20balls in a panPIRA 1000
4F10.20balls in a pan4F10.20Three red balls and three yellow balls are mixed in a pan.
4F10.25communication time and entropyAJP 41(11),1284Demonstrate entropy with the time it takes a student to communicate the structure of ordered and disordered playing cards, and a salt crystal model, etc.
4F10.30Hilsh tubePIRA 500
4F10.30Hilsh tube4F10.30
4F10.30Hilsch tubeHm-3The Hilsch tube is a sort of double vortex that separates hot and cold air.
4F10.40dust explosionPIRA 500
4F10.40dust explosion4F10.40
4F10.40dust explosionsHm-1Disperse dust in a can with a squeeze bulb and use a spark to set off the explosion.
4F10.40dust explosion26-4.5Blow a teaspoon of lycopodium powder into a covered can that contains a lighted candle inside.
4F10.40dust explosionDisc 14-15Blow lycopodium powder into a can containing a candle.
4F10.45gas explosion26-4.6Fill 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.

ReferenceDescription
M-1Sutton
Ma-1Freier & Anderson
M-1dHilton
8-2.8Meiners
1A12.01University of Minnesota Handbook
AJP 52(1),85American Journal of Physics
TPT 15(5),300The Physics Teacher
Disc 01-01The Video Encyclopedia of Physics Demonstrations

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