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from
Inquiries Into Physics

Chapter 5: Temp and Heat

1. Temperature
2. Thermal Expansion
3. 1st Law of Thermo
4. Heat Transfer
5. Specific Heat
6. Phase Transitions
7. 2nd Law of Thermo

Temperature and Heat Videos

Temperature	Discussion	Streaming	Download	Demo Page
Liquid Nitrogen	When nitrogen gas is cool enough, it becomes a liquid. This liquid can then be used to freeze items such as flowers.	Real	Real MPG
Thermal Expansion	Discussion	Streaming	Download	Demo Page
Bi-Metalic Strip	Different metals expand at different rates when heated. One side of the strip is one metal and the other side is another. The higher expansion rate of the longer side causes the strip to bend when heated.	Real	Real MPG	Thermo 4A30.10
Ring and Ball	The ball will not pass through the ring until the ring is hotter than the ball. This means the ring has expanded to allow the ball to pass through.	Real	Real MPG	Thermo 4A30.21
Light Bulb Thermostat, single bulb	The big light bulb heats a bi-metalic strip. When the strip bend enough, it breaks the circuit for the large bulb. When the strip cools and straightens, it turns on the large bulb again.	Real	Real MPG	Thermo 4A30.11
Light Bulb Thermostat, both bulbs	The big light bulb heats a bi-metalic strip. When the strip bend enough, it breaks the circuit for the large bulb and closes the circuit for the small bulb. When the strip cools and straightens, it switches off the small bulb and turns on the large bulb.	Real	Real MPG	Thermo 4A30.11
1st Law of Thermo	Discussion	Streaming	Download	Demo Page
Convection Currents	A drop of food coloring is placed in water at the top of a glass loop. When one corner is heated, a convection current is started and the food coloring will move around the ring.	Real	Real MPG	Thermo 4B20.10
Leslie Cube; light side	Different colored sides of the Leslie Cube radiate different amounts of heat.	Real	Real MPG	Thermo 4B40.30
Leslie Cube; dark side	Different colored sides of the Leslie Cube radiate different amounts of heat.	Real	Real MPG	Thermo 4B40.30
Heat Transfer	Discussion	Streaming	Download	Demo Page
Thermoelectric Fan	The temperature difference between the water and the liquid nitrogen is used to create electricity and run the fan.	Real	Real MPG	Thermo 4F50.12
Phase Transitions	Discussion	Streaming	Download	Demo Page
Drinking Duck	As the liquid evaporates from the head of the duck, the liquid in the duck heats up (towards room temp) making it rise up the duck's body. When it passes the CM point of the duck, it tips it over, getting the beak wet again. The cool water cools the liquid and the duck stands back up.	Real	Real MPG	Thermo 4C31.30
2nd Law of Thermo	Discussion	Streaming	Download	Demo Page
Steam Engine	A boiler produces steam which is used to drive a piston. The piston, in turn, drives a wheel which drives an electromagnet, producing electricity. The light bulb will light up when enough electricity is produced.	Real	Real MPG	Thermo 4F30.20