Differences between revisions 4 and 19 (spanning 15 versions)

Large Ball and Ring Stand, 4A30.20

Topic and Concept:

Thermal Properties of Matter, 4A30. Solid Expansion

pira200 Listed

Location:

Cabinet: Thermodynamics Cabinet
Bay: (A3)?
Shelf: #1?

Description:

This demonstration has a ball and ring with stand. It demonstrates the thermal expansion of the material by heating the ball.

Equipment	Location	ID Number

A ring with stand and a ball with hanger	TD, A3, Shelf #1	4A30.20
Burner with an iron ring tripod and wire net screen	location	NA
An iron ring tripod and a screen	location	NA
Safety grove and glasses	location	NA
Red and white gas carts	Rooms 2103, 2241, (and 2223 upon request)

Important Setup Notes:

This demonstration requires a supply of methane gas usually provided by the red and white gas carts found in rooms 2103, 2241, (and 2223 upon request).

Setup and Procedure:

To light the burner, connect the attached gas hose to the gas out (red panel) on the red and white gas cart.
Open the gas valve.
Light a match and bring it near the top of the burner.
The flame will ignite the gas. Adjust the flame height accordingly by adjusting the valve.
Show that the ball can get through the ring.
Put the lit burner beneath the tall ring stand with the screen on the top.
Lower the ball onto the screen using the attached hook. It will take about a minute for the ball to heat up enough to not fit through the ring
Take the ball off the stand and try to lower the ball through the ring.
If the ball fits through the ring, repeat steps 7 & 8. Otherwise, let the ball rest on the ring. As it cools, it will eventually shrink enough to drop through the ring.

Cautions, Warnings, or Safety Concerns:

Always use the gloves and safety glasses throughout this demonstration.
Beware of the heated plate - contact with skin could cause severe burns!

Discussion:

When the ball is heated, its dimensions increase while maintaining their relative proportions. Heating causes the molecular bonds to lengthen, which causes the material to expand. This is considered a 2D expansion since the quantity of importance for the ball to fit through the ring is the cross sectional area. The expansion can be described by ΔA/A = α_A*ΔT = α_L²*ΔT where A is the area at temperature T_i, ΔA is the change in area when the material is at temperature T_f, ΔT is T_f - T_i, and α is the coefficient of thermal expansion which depends on the material. See references below for more information.

Videos:

Lecture Demonstration's Youtube Channel

References:

Home

-  ⇤ ← Revision 4 as of 2009-10-02 15:30:32 → 
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  Editor: srnarf
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+   ← Revision 19 as of 2018-07-18 19:07:13 → ⇥
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-Deletions are marked like this.
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-=  Large Ball and Ring Stand , 4A30.20 =
+||<30%  style="&quot;text-align:center&quot; ">[[PiraScheme#Thermodynamics|Table of Thermodynamics Demonstration]] ||<30%  style="&quot;text-align:center&quot; ">[[TDEquipmentList|Thermodynamics Equipment List]] ||<30%  style="&quot;text-align:center&quot; ">[[Demonstrations|Lecture Demonstrations]] ||


= Large Ball and Ring Stand, 4A30.20 =
'''Topic and Concept:'''

 . Thermal Properties of Matter, [[ThermalProperties#SolidExpansion|4A30. Solid Expansion]]

'''pira200 Listed'''
-Line 5:
+Line 13:
-Line 6:
+Line 15:
- * '''Bay:''' (A3)
 * '''Shelf:''' #1
+ * '''Bay:''' (A3)?
 * '''Shelf:''' #1?
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+Line 18:
-attachment:4A30-20_01a.jpg
+{{attachment:BallStand04-400.jpg}}
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+Line 22:
-Insert description of apparatus, its component, what it is demonstrating. 

||<:style="width: 60%" :40%>'''Equipment'''||<:30%>'''Location'''||<:25%>'''ID Number'''||
+This demonstration has a ball and ring with stand. It demonstrates the thermal expansion of the material by heating the ball.
||<40%  style="&quot;text-align:center&quot; ">'''Equipment''' ||<30%  style="&quot;text-align:center&quot; ">'''Location''' ||<25%  style="&quot;text-align:center&quot; ">'''ID Number''' ||
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+Line 25:
-||A ring with a set of two balls||[:ThermoCabinetBayA3: TD, A3, Shelf #1]||<:> 4A30.20 ||
||Burner||location||<:> NA ||
||Liquid nitrogen||location||<:> NA ||
||Safety grove and glasses||location||<:> NA ||
+||A ring with stand and a ball with hanger ||[[ThermoCabinetBayA3|TD, A3, Shelf #1]] ||<style="&quot;text-align:center&quot;">4A30.20 ||
||Burner with an iron ring tripod and wire net screen ||location ||<style="&quot;text-align:center&quot;">NA ||
||An iron ring tripod and a screen ||location ||<style="&quot;text-align:center&quot;">NA ||
||Safety grove and glasses ||location ||<style="&quot;text-align:center&quot;">NA ||
||[[RedWhiteGasCart|Red and white gas carts]] ||Rooms 2103, 2241, (and 2223 upon request) || ||
-Line 23:
+Line 32:
-'''Setup:'''
-Line 25:
+Line 33:
-. Make a Setup check list.
 1. ...
+'''''Important Setup Notes:'''''

 * This demonstration requires a supply of methane gas usually provided by the [[RedWhiteGasCart|red and white gas carts]] found in rooms 2103, 2241, (and 2223 upon request).

'''Setup and Procedure:'''

 1. To light the burner, connect the attached gas hose to the gas out (red panel) on the [[RedWhiteGasCart|red and white gas cart]].
 1. Open the gas valve.
 1. Light a match and bring it near the top of the burner.
 1. The flame will ignite the gas. Adjust the flame height accordingly by adjusting the valve.
 1. Show that the ball can get through the ring.
 1. Put the lit  burner beneath the tall ring stand with the screen on the top.
 1. Lower the ball onto the screen using the attached hook. It will take about a minute for the ball to heat up enough to not fit through the ring
 1. Take the ball off the stand and try to lower the ball through the ring.
 1. If the ball fits through the ring, repeat steps 7 & 8. Otherwise, let the ball rest on the ring. As it cools, it will eventually shrink enough to drop through the ring.
-Line 29:
+Line 51:
-. List any Warnings....
 1. Demonstration may require practice.
+ * Always use the gloves and safety glasses throughout this demonstration.
 * Beware of the heated plate - contact with skin could cause severe burns!

'''Discussion:'''

When the ball is heated, its dimensions  increase while maintaining their relative proportions. Heating causes the molecular bonds to lengthen, which causes the material to expand. This is considered a 2D expansion since the quantity of importance for the ball to fit through the ring is the cross sectional area. The expansion can be described by ΔA/A = α,,A,,*ΔT = α,,L,,^2^*ΔT where A is the area at temperature T,,i,,, ΔA  is the change in area when the material is at temperature T,,f,,, ΔT is T,,f,, - T,,i,,, and α is the coefficient of thermal expansion which depends on the material.  See references below for more information.
|| {{attachment:4A30-20_01a.jpg}} || {{attachment:4A30-20_02a.jpg}} || {{attachment:BallStand03-250.jpg}} || {{attachment:BallStand04-250.jpg}} ||
|| {{attachment:BallStand05-250.jpg}} || {{attachment:BallStand06-250.jpg}} ||
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-'''Demonstration:'''
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+Line 63:
-Insert description of demonstration, how is the demonstration preformed.
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-||attachment other photos||attachment other photos||
||attachment other photos||attachment other photos||
+'''Videos:'''

 * [[https://www.youtube.com/user/LectureDemostrations/videos?view=1|Lecture Demonstration's Youtube Channel]]
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+Line 70:
-. List any references
+ * [[https://en.wikipedia.org/wiki/Thermal_expansion|Wikipedia - Thermal Expansion]]
 * [[http://en.wikipedia.org/wiki/Coefficient_of_thermal_expansion|Wikipedia - Coefficient of Thermal Expansion]]
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+Line 73:
-[:ThermalProperties:Thermal Properties of Matter] 

[:Demonstrations:Demonstrations]

[:Instructional:Home]
+[[Instructional|Home]]

fw: Diff for "LBRS"

Large Ball and Ring Stand, 4A30.20