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Size: 1633
Comment:
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Size: 2064
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| = Wooden Doweling With (metal) tube , 4B.30.40 = | = Wooden Doweling With Brass tube , 4B.30.40 = |
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| Heat conduction demonstration. Two wooden dowels and a brass tube, 5/4 inches in diameter. |
Thermal conduction demonstration that compares the thermal conductivity of metal and wood. Two wooden dowels and a brass tube, 5/4 inches in diameter. Each wooden dowel is inserted to the brass tube on both ends. Wrap tightly a sheet of paper around the brass tube and the inner part of wooden dowels near the brass tube. |
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| Note: Make sure that the red and white striped cart is in placed and connected to the utility trench which is connected to the gas infrastructure. | Note: Make sure that the red and white gas cart is in placed and connected to the utility trench gas line. |
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| 1. Wrap a sheet of paper around the wood dowel rods and brass tube which are jointed end to end. | 1. Insert the wooden dowel rods into the brass tube on both side. 1. Wrap tightly a sheet of paper around the brass tube and the inner part of wooden dowels near the brass tube and tape the paper by scotch tape. 1. Connect the burner gas line to the red and white gas cart. |
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| Wrap a sheet of paper around the brass tube and the joint between the wooden dowel rods and the brass tube. Place the junction in the flame. The part of the paper wrapped around the wood will be darker than that around the metal because the metal has more rapidly conduction the heat away than the wood. | This demonstration shows thermal conduction properties of different materials. After setup, you have to carefully heat the paper along the wood/brass tube by holding it far enough from the flame so that the paper is not burned out. As the time goes by, you will see the the paper that wraped on the wooden dowel part is getting darker than that on the brass tube. |
Wooden Doweling With Brass tube , 4B.30.40
Location:
Cabinet: Thermodynamics Cabinet
Bay: (A4)
Shelf: #2
(attachment photo showing the fully set up demonstration)
Description:
Thermal conduction demonstration that compares the thermal conductivity of metal and wood. Two wooden dowels and a brass tube, 5/4 inches in diameter. Each wooden dowel is inserted to the brass tube on both ends. Wrap tightly a sheet of paper around the brass tube and the inner part of wooden dowels near the brass tube.
Equipment |
Location |
ID Number |
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Wood and metal rod |
[:ThermoCabinetBayA4: TD, A4, Shelf #2] |
4B.30.40 |
Paper |
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Scotch tape |
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Burner |
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Setup:
Note: Make sure that the red and white gas cart is in placed and connected to the utility trench gas line.
- Insert the wooden dowel rods into the brass tube on both side.
- Wrap tightly a sheet of paper around the brass tube and the inner part of wooden dowels near the brass tube and tape the paper by scotch tape.
- Connect the burner gas line to the red and white gas cart.
Cautions, Warnings, or Safety Concerns:
- Beware of hot frame.
- Demonstration may require practice.
Demonstration:
This demonstration shows thermal conduction properties of different materials. After setup, you have to carefully heat the paper along the wood/brass tube by holding it far enough from the flame so that the paper is not burned out. As the time goes by, you will see the the paper that wraped on the wooden dowel part is getting darker than that on the brass tube.
attachment other photos |
attachment other photos |
attachment other photos |
attachment other photos |
References:
- List any references
[:FirstLaw:Heat and the First Law]
[:Demonstrations:Demonstrations]
[:Instructional:Home]