Differences between revisions 1 and 10 (spanning 9 versions)
⇤ ← Revision 1 as of 2012-02-27 21:18:33 →
Size: 1848
Editor: srnarf
Comment:
← Revision 10 as of 2012-09-10 23:33:37 → ⇥
Size: 2849
Editor: srnarf
Comment:
Deletions are marked like this. Additions are marked like this.
Line 2: Line 2:
||<:30%>[:PiraScheme#Mechanics: Table of Mechanics Demonstration]||<:30%>[:MEEquipmentList: List of Mechanics Equipment & Supplies]||<:30%>[:Demonstrations:Lecture Demonstrations]|| ||<:30%>[:PiraScheme#FluidMechanics: Table of Fluid Mechanics Demonstration]||<:30%>List of Fluid Mechanics Equipment & Supplies||<:30%>[:Demonstrations:Lecture Demonstrations]||
Line 6: Line 6:
'''Topic and Concept:'''
  Motion in One Dimension, [:MotionIn1D#Velocity: 1C10. Velocity]
Line 7: Line 10:
 * '''Cabinet:''' [:MechanicsCabinet:Mechanic (ME)], Waves & Sound (WS)....
 * '''Bay:''' (A? or B?) Like [:MechanicsCabinetBayA1:(A1)]
 * '''Shelf:''' #1,2,3.. (Use "T" for items that are on top of that cabinet bay)		  * '''Cabinet:''' [:FluidMechanicsCabinet:Fluid Mechanics (FM)]
 * '''Bay:''' [:FluidMCabinetBayA5:A5]
 * '''Shelf:'''1
Line 11: Line 14:
(attachment photo showing the fully set up demonstration) attachment:GlycerinViscosity-01-400.jpg
Line 13: Line 16:
'''Description:''' '''Abstract:'''
Line 15: Line 18:
Insert description of apparatus, its component, what it is demonstrating. Two identical marbles are dropped simultaneously into separate graduated cylinders, one filled with glycerine and the other with water. The marble dropped in glycerine will quickly reach terminal velocity, obtaining a slow and constant velocity that can be measured.
Line 19: Line 22:
||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 || ||		 ||Graduated cylinder filled with water ||FM, Bay A5, Shelf #1|| ||
||Graduated cylinder filled with glycerin||FM, Bay A5, Shelf #1|| ||
||Marbles||FM, Bay A5, Shelf #1|| ||
Line 28: Line 28:
 A. '''''This demonstration requires a minimum 24 hour notice.'''''
 * '''''This demonstration requires LN2'''''
 * '''''Back-to-Back lectures is NOT possible; We'll do one lecture one day and the other the next day.'''''		  * '''''Don't spill the glycerin - it's difficult to clean up.'''''
Line 33: Line 31:
'''Setup:''' '''Setup and Procedure:'''
Line 35: Line 33:
 1. Make a Setup check list.
 1. ...		  1. Fill non-glycerin cylinder with water so that fluid height levels in each cylinder match.
 1. Place cylinders on table side-by-side.
 1. Grab two marbles of identical size and weight.
 1. Hold one marble in each hand above each cylinder.
 1. From the same height, drop each marble at the same time, and observe the velocity differences.
Line 39: Line 41:
 1. List any Warnings....
 1. Demonstration may require practice.		  * N/A
Line 42: Line 43:
'''Discussion:'''
 Suppose there is a body being accelerated by two opposing forces. One of these forces is constant, and the other is velocity-dependent. There will be a point in the body's trajectory when the two forces exactly cancel, and the body is no longer accelerating. The velocity at which this occurs is called the body's terminal velocity. Such velocity-dependent forces frequently occur in fluids such as air and glycerol in the form of resistance.
Line 43: Line 46:
'''Demonstration:'''  Glycerol is a highly viscous fluid which means it is resistant to flowing. Thus, the resistance force on the marbles quickly reaches a point when gravity is just balanced. In a less viscous fluid such as water, it takes longer to reach this point.
 
Line 45: Line 49:
Insert description of demonstration, how is the demonstration preformed.

||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]
Line 51: Line 53:

 1. List any references		  * [http://en.wikipedia.org/wiki/Glycerol Glycerol - Wikipedia]
 * [http://en.wikipedia.org/wiki/Terminal_velocity Terminal Velocity - Wikipedia]
 * [http://en.wikipedia.org/wiki/Viscosity Viscosity - Wikipedia]

[:PiraScheme#FluidMechanics: Table of Fluid Mechanics Demonstration]

List of Fluid Mechanics Equipment & Supplies

[:Demonstrations:Lecture Demonstrations]

Terminal Velocity With Water, Glycerin, & Marbles, 2C30.50 and 1C10.51

Topic and Concept:

  • Motion in One Dimension, [:MotionIn1D#Velocity: 1C10. Velocity]

Location:

  • Cabinet: [:FluidMechanicsCabinet:Fluid Mechanics (FM)]

  • Bay: [:FluidMCabinetBayA5:A5]

  • Shelf:1

attachment:GlycerinViscosity-01-400.jpg

Abstract:

Two identical marbles are dropped simultaneously into separate graduated cylinders, one filled with glycerine and the other with water. The marble dropped in glycerine will quickly reach terminal velocity, obtaining a slow and constant velocity that can be measured.

Equipment

Location

ID Number

Graduated cylinder filled with water

FM, Bay A5, Shelf #1

Graduated cylinder filled with glycerin

FM, Bay A5, Shelf #1

Marbles

FM, Bay A5, Shelf #1

Important Setup Notes:

  • Don't spill the glycerin - it's difficult to clean up.

Setup and Procedure:

  1. Fill non-glycerin cylinder with water so that fluid height levels in each cylinder match.
  2. Place cylinders on table side-by-side.
  3. Grab two marbles of identical size and weight.
  4. Hold one marble in each hand above each cylinder.
  5. From the same height, drop each marble at the same time, and observe the velocity differences.

Cautions, Warnings, or Safety Concerns:

  • N/A

Discussion:

  • Suppose there is a body being accelerated by two opposing forces. One of these forces is constant, and the other is velocity-dependent. There will be a point in the body's trajectory when the two forces exactly cancel, and the body is no longer accelerating. The velocity at which this occurs is called the body's terminal velocity. Such velocity-dependent forces frequently occur in fluids such as air and glycerol in the form of resistance. Glycerol is a highly viscous fluid which means it is resistant to flowing. Thus, the resistance force on the marbles quickly reaches a point when gravity is just balanced. In a less viscous fluid such as water, it takes longer to reach this point.

Videos:

References:

[:Instructional:Home]

fw: GlycerinViscosity (last edited 2013-07-12 18:18:25 by localhost)