# | Title | Image | Description | Video |
1 | Bimetallic Strip |
Solid Expansion
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A bimetal strip is brass on one side and steel on the other. When heated over a Bunsen burner, the strip curves toward the steel side. OR, when cooled in liquid nitrogen the strip curves toward the brass side. |
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2 | Ball and Ring |
Solid Expansion
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Try putting the ring around the ball. At room temperature the ball is slightly larger the ring and will not pass through the ring Heat the ring over the Bunsen burner and try again. You may also cool the ball in liquid nitrogen. This takes several minutes. |
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3 | Convection Tube |
Convection
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A square tube is filled with water. Light the Bunsen burner and place under one side. Using the eye dropper, drop several drops of ink into the top hole. The ink shows the direction of fluid flow. Move the burner to the other side of the tube to reverse the flow. |
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4 | Conduction Rods |
Conduction
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Four rods with liquid crystal thermometers are placed in hot water to show different conduction rates. |
Video |
5 | Light the Match |
Radiation
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Two reflectors are set at opposite ends of the lecture bench. One contains a heater controlled by a variac. The other has a match at the focal point of the reflector. Turn the variac all the way up and wait. The match will light in about 1 minute. If it takes longer, something is wrong. Alignment is critical! |