Monday, 22 July 2013 09:49

## I1-13 THERMAL EXPANSION - BIMETAL STRIP

• ID Code: I1-13
• Purpose: Demonstrates differential thermal expansion
• Description: Two strips of different metals, invar steel and brass, are welded together to form a bimetal strip. Since each metal has a different coefficient of thermal expansion, heating the bimetal strip will result in the metals expanding at different rates, causing it to bend. This type of material is used in some types of thermostatic controllers. Questions: Which metal will expand more when it is heated? What happens when it is cooled?
• Availability: Available
• Loc codes: I1, I0
Read 1057 times Last modified on Friday, 22 September 2017 09:03
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Show several types of thermometers. Read More
• #### I1-11 THERMAL EXPANSION - BALL AND HOLE

Illustrate thermal expansion in a paradoxical way. Read More
• #### I1-12: THERMAL EXPANSION - BALL AND RING

Demonstrate thermal expansion. Read More
• #### I1-13 THERMAL EXPANSION - BIMETAL STRIP

Demonstrate differential thermal expansion. Read More
• #### I1-14: THERMAL EXPANSION OF ALUMINUM - OPTICAL LEVER

Demonstrate thermal expansion in a complicated way. Read More
• #### I1-15: THERMAL EXPANSION - PIN BREAKER

Demonstrate thermal expansion in a dramatic way. Read More
• #### I1-16: THERMAL CONTRACTION OF CUPS WITH LN

Measure coefficients of linear expansion. Read More
• #### I1-17: THERMOSTAT - MODEL

Model of use of a bimetal strip in a thermostat. Read More
• #### I1-18: BIMETALLIC STRIP THERMOMETERS

Allow students to see how bimetallic strips are used in thermometers and thermostats. Read More
• #### I1-19: LAVA LAMP

Demonstrate differential thermal expansion between two liquids, and to take us all back to the 1960s. Read More
• #### I1-21: WATER NEAR 4 DEGREES CELCIUS

Demonstrate that the maximum density of water occurs around 4 degrees centigrade. Read More
• #### I1-22: WATER DENSITY VS TEMPERATURE

Demonstrate the change in the density of water with temperature. Read More
• #### I1-32: RUBBER BAND CONTRACTION DURING HEATING

To demonstrate that rubber contracts when heated. Read More
• #### I1-40: REVERSIBLE THERMOELECTRIC DEMONSTRATOR

Demonstrate thermoelectric power generation or how thermoelectric devices can create hot and cold regions. Read More
• #### I1-41: THERMOELECTRIC MAGNET

Demonstrate production and use of thermoelectric current. Read More
• #### I1-42: THERMOELECTRIC FAN

Illustrate generation and use of thermoelectric current. Read More
• #### I1-51: RUBBER AT LN TEMPERATURE

Demonstrate how a normally elastic material at room temperature becomes rigid at very low temperatures. Read More
• #### I1-52: TUNING FORK AT LIQUID NITROGEN TEMPERATURE

Demonstrate the change in frequency of a tuning fork at liquid nitrogen temperature. Read More
• #### I1-53: LEAD BELL AT LIQUID NITROGEN TEMPERATURE

Demonstrate the effect of temperature on vibrations in a lead bell. Read More
• #### I1-61: DUST EXPLOSION

Produce a dust explosion. Read More
• #### I1-62: DUST EXPLOSION MODEL

Show why small particles of flammable material can create a dust explosion when ignited. Read More
• #### I1-63: HYDROGEN EXPLOSION

Produce a hydrogen explosion. Read More
• #### I1-64: BURNING CANDLE - COMBUSTION PROCESS

Demonstrate features of the burning process and to debunk myths about this supposedly well-known demonstration. Read More
• #### I1-71: SHAPE-MEMORY ALLOY - THERMOBILE

Illustrate shape-memory alloy. Read More
• #### I1-72: SHAPE-MEMORY ALLOY - ICEMOBILE

Illustrate shape-memory alloy. Read More
• #### I1-73: SHAPE-MEMORY ALLOY - COOL CRAFT

Illustrate shape-memory alloy. Read More
• #### I1-74: SHAPE-MEMORY ALLOY - CLOVER

Illustrate shape-memory alloy. Read More
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