|
Size: 1934
Comment:
|
Size: 2284
Comment:
|
| 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 24: | Line 24: |
| A : Extended ball 1. First demonstrate to student that the ball is smaller than the ring. So, it can get through the ring. 1. Install the burner. 1. 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 1. First demonstrate to student that the ring is larger than the ball. So, the ball can get through the ring. 1. Open the liquid nitrogen holder. 1. 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. |
1. Make sure that you have all of the apparatuses in table above. 1. Install the burner gas tube with the gas source. 1. Make sure that you have the gas switch off and in the right pressure that you want before you turn it on. 1. Heat the ball from the set that a ball can get through a ring. 1. Put the ring from the set that a ball cannot get through a ring on the liquid nitrogen holder. |
| Line 39: | Line 32: |
| 1. Beware of the heated ball and the cooled ring. | 1. Beware of the heated ring and the cooled ring. |
| Line 44: | Line 37: |
| 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 46: | Line 39: |
| ||attachment other photos||attachment other photos|| | 1 : Extended ball 1. First demonstrate to student that the ball is smaller than the ring. So, it can get through the ring. 1. 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 1. First demonstrate to student that the ring is larger than the ball. So, the ball can get through the ring. 1. 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|| |
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 gas tube with the gas source.
- Make sure that you have the gas switch off and in the right pressure that you want before you turn it on.
- Heat the ball from the set that a ball can get through a ring.
- Put the ring from the set that a ball cannot get through a ring on the liquid nitrogen holder.
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.
- 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.
- 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]