|
Size: 1984
Comment:
|
Size: 2326
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 25: | Line 25: |
| 1. | 1. Install the burner with the gas source. 1. Heat the ball on the set that a ball can get through a ring, then show that the ball cannot get through the ring. 1. Put the ring of the set that a ball cannot get through a ring on the liquid nitrogen holder, then show that the ball can get through the ring. |
| Line 29: | Line 31: |
| 1. Beware of the heated ball and the cooled ring. | 1. Beware of the heated ring and the cooled ring. |
| Line 34: | Line 36: |
| The extended ball demonstrates the thermal expansion property of the material. And the shrink ring demonstrates the opposite effect of thermal expansion property. | The extended ball demonstrates the thermal expansion property of the material. And the shrink ring demonstrates the opposite effect of thermal expansion property. You can show the students two ways. |
| Line 36: | Line 38: |
| A : Extended ball | 1 : Extended ball |
| Line 42: | Line 44: |
| B : Shrink ring | 2 : Shrink ring |
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:
- Make sure that you have all of the apparatuses in table above.
- Install the burner with the gas source.
- Heat the ball on the set that a ball can get through a ring, then show that the ball cannot get through the ring.
- Put the ring of the set that a ball cannot get through a ring on the liquid nitrogen holder, then show that the ball can get through the ring.
Cautions, Warnings, or Safety Concerns:
- Wear the safety glove and glasses.
- Beware of the heated ring 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. You can show the students two ways.
1 : 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.
2 : 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.
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]