Demos by PIRA
4A10 Thermometry
4A10.10Measurement of temperature: Various types of thermometers.
4A10.50Liquid Crystals: sheet changes colors with body temperature.
4A20 Liquid Expansion
4A30 Solid Expansion
4A30.10Bimetallic strip: Brass/invar strip curves when heated.
4A30.11Bimetallic switch: Change in temperature lights cold/hot lamps.
4A30.21Ring and ball: Ball fits through ring only after ring is heated.
4A30.30Heated steel rod expands, raises pointer,breaks pin on cooling.
4A30.60Heated horizontal nichrome wire stretches, weight sags.
4A30.61Heated iron wire stretches, rotates pointer.
4A40 Properties of Materials at Low Temperature
4A40.90Molecular models, ball and stick.