|
Size: 1934
Comment:
|
Size: 1908
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 9: | Line 9: |
| (attachment photo showing the fully set up demonstration) | attachment:4A30-21_01.jpg |
| Line 46: | Line 46: |
| ||attachment other photos||attachment other photos|| | ||attachment:4A30-21_01a.jpg||attachment:4A30-21_02a.jpg|| |
Ball and Ring, 4A30.21
Location:
Cabinet: Thermodynamics Cabinet
Bay: (A3)
Shelf: #1
attachment:4A30-21_01.jpg
Description:
Two set of a brass ring and a brass ball.
Equipment |
Location |
ID Number |
|
|
|
Two set of a ring and a ball |
[:ThermoCabinetBayA3: TD, A3, Shelf #1] |
4A30.21 |
Burner |
location |
NA |
Liquid nitrogen |
location |
NA |
Safety glove and glasses |
location |
NA |
Setup:
A : Extended ball
- First demonstrate to student that the ball is smaller than the ring. So, it can get through the ring.
- Install the burner.
- Heat the ball until it expands. Demonstrate to student, this time the ball is larger than the ring. So, it cannot get through the ring.
B : Shrink ring
- First demonstrate to student that the ring is larger than the ball. So, the ball can get through the ring.
- Open the liquid nitrogen holder.
- Put the ring in the liquid nitrogen until you are sure that it shrinks. Demonstrate to student, this time the ring is smaller than the ball. So, it cannot get through the ring.
Cautions, Warnings, or Safety Concerns:
- Wear the safety glove and glasses.
- Beware of the heated ball and the cooled ring.
Demonstration:
The extended ball demonstrates the thermal expansion property of the material. And the shrink ring demonstrates the opposite effect of thermal expansion property.
attachment:4A30-21_01a.jpg |
attachment:4A30-21_02a.jpg |
attachment other photos |
attachment other photos |
References:
- List any references
[:ThermalProperties:Thermal Properties of Matter]
[:Demonstrations:Demonstrations]
[:Instructional:Home]