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Size: 1293
Comment:
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Size: 2385
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 2: | Line 2: |
| = Balls and Plate , 4A30.21 = | = Balls and Plate , 4A30.22 = |
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| (attachment photo showing the fully set up demonstration) | attachment:4A30-22_01.jpg |
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| ||apparatus||ME, Bay B1, Shelf #2|| || ||all other parts||ME, Bay B1, Shelf #2|| || ||...||ME, Bay B1, Shelf #2|| || ||Possible supplies that are needed||Rode and Tack Cabinet|| || ||...|| In Lecture Halls|| || ||...|| Stock Cabinet || || ||...|| Stock Cabinet || || |
||A brass plate with a hole||[:ThermoCabinetBayA3: TD, A3, Shelf #1]||<:> 4A30.22 || ||Two balls||[:ThermoCabinetBayA3: TD, A3, Shelf #1]||<:> 4A30.22 || ||Burner||location||<:> NA || ||Liquid Nitrogen||location||<:> NA || ||Safety grove and glasses||location||<:>NA || |
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1. Make a Setup check list. 1. ... |
1. |
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| 1. List any Warnings.... 1. Demonstration may require practice. |
1. Beware of the heated plate. |
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| Insert description of demonstration, how is the demonstration preformed. | When the plate is heated, it expands the hole in the middle of the plate. [The molecular bonds are lengthened, when the material expands. Try to think in this way, a group of people standing in a tight circle with elbows linked. Then they lengthen their "bonds" by moving to hold hands at arms length. They also have to expand the circle by standing back, while they all stand further apart. This is like the molecular bonds around the hole.] So the ball can get through it. You have two options to show student by following. |
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| ||attachment other photos||attachment other photos|| | Option A. Shrink or extended ball 1. Demonstrate to students that the smaller ball can get through the hole and the larger ball cannot. 1. Heat the smaller ball or put the larger ball in the liquid nitrogen, this will make the opposite situation from the previous. Option B. Extended Hole 1. Demonstrate to students that the smaller ball can get through the hole and the larger ball cannot. 1. Heat the ball by the burner until you sure that the hole get larger than before. 1. Demonstrate to students again, this time both balls should get through the hole. ||attachment:4A30-22_01a.jpg||attachment:4A30-22_02a.jpg|| |
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| 1. List any references | 1. [http://wiki.answers.com/Q/When_a_block_with_a_hole_in_it_is_warmed_why_doesn%27t_the_material_around_the_hole_expand_into_the_hole_and_make_it_smaller Wikianswers] |
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| [Insert a back link to main topic list] | [:ThermalProperties:Thermal Properties of Matter] |
Balls and Plate , 4A30.22
Location:
Cabinet: Thermodynamics Cabinet
Bay: (A3)
Shelf: #1
attachment:4A30-22_01.jpg
Description:
Insert description of apparatus, its component, what it is demonstrating.
Equipment |
Location |
ID Number |
|
|
|
A brass plate with a hole |
[:ThermoCabinetBayA3: TD, A3, Shelf #1] |
4A30.22 |
Two balls |
[:ThermoCabinetBayA3: TD, A3, Shelf #1] |
4A30.22 |
Burner |
location |
NA |
Liquid Nitrogen |
location |
NA |
Safety grove and glasses |
location |
NA |
Setup:
Cautions, Warnings, or Safety Concerns:
- Beware of the heated plate.
Demonstration:
When the plate is heated, it expands the hole in the middle of the plate. [The molecular bonds are lengthened, when the material expands. Try to think in this way, a group of people standing in a tight circle with elbows linked. Then they lengthen their "bonds" by moving to hold hands at arms length. They also have to expand the circle by standing back, while they all stand further apart. This is like the molecular bonds around the hole.] So the ball can get through it. You have two options to show student by following.
Option A. Shrink or extended ball
- Demonstrate to students that the smaller ball can get through the hole and the larger ball cannot.
- Heat the smaller ball or put the larger ball in the liquid nitrogen, this will make the opposite situation from the previous.
Option B. Extended Hole
- Demonstrate to students that the smaller ball can get through the hole and the larger ball cannot.
- Heat the ball by the burner until you sure that the hole get larger than before.
- Demonstrate to students again, this time both balls should get through the hole.
attachment:4A30-22_01a.jpg |
attachment:4A30-22_02a.jpg |
attachment other photos |
attachment other photos |
References:
[:ThermalProperties:Thermal Properties of Matter]
[:Demonstrations:Demonstrations]
[:Instructional:Home]