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Ball alternating with springs are compressed more at the bottom. This shows how the density of air changes with altitude.

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PHYSICS
2B40.45D Weight of Air using balls and springs on a rod Rating:

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Description: Balls with holes in them are arranged over a rod with alternating balls and springs. When held vertically the bottom spring is compressed more than the top one simulating the weight of air.
Room:PS F175 Location: Ae6 Sublocation:
Type: demo Date Added:6/13/2006 Condition:
Quantity: Complete: Last updated: 6/16/2006
Purpose: To show that the density of air decreases with altitude.
Safety Issues: Disclaimer (Warning - work in progress - may be incomplete)
Equipment Issues:
Parts:
40 balls 4.5 g
60 heavy springs 350 N/m
60 light springs 70 N/m
30 nuts to increase weight
brass rod
might be stored at 1 - 1
Copyright © 2000 Instructions:PASCO's Matter Model is a collection of balls that connect with springs to form a cubic model. There is also a hole in the balls so that the balls and springs can fit over a rod.
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1A0 MEASUREMENT
1A10 Basic Units
1A10.10 Basic units set-Video Video Encyclopedia: Show a clock with a second sweep, meter & yard sticks, and kilogram and pound mass
VE01_01
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1A10.35 Meter stick - 4 sided Graduated in meters, decimeters, centimeters, & millimeters
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1A10.50 Liter Cube/set
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1A10.510 Meter Cube Meter cube frame, stored dismantled
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1A10.520 Volume Perception Paradox One liter of colored water is poured from a sphere to cylinder. The sphere seems smaller but is of equal volume.
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1A10.60 Avogadro's Number box Black 22.4 liter cube
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1A20 Error and Accuracy
1A20.10 Gaussian curve - Video Video Encyclopedia: A commercial device for the overhead projector where ball bearings roll through an array of nails into parallel chutes.
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PS F175
1A20.25A Dice - ordinary
Aa2
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1A20.25B Dice - overhead
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1A20.25C Dice - polyhedral
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PS F175
1A20.25D Dice - large foam
Aa2
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1A30 Coordinate System
1A30.10A XYZ Coordinate axes Long arrow shafts with label attachments
top
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PS F175
1A30.10B XYZ Coordinate axes Zometool version
Aa3
PS F175
1A30.10C XYZ Coordinate axes Medium arrow shafts with dull broadheads
cabinet
PS H356
1A30.30 Polar Coordinates A semi circle is rotated about an axis to demonstrate why integration over theta is from zero to 180 degrees.
Aa3
PS F175
1A30.30 Polar Coordinates
1A30.40A Chalkboard Globe - Large
Af6
PS H156
1A30.40B Chalkboard Globe - Small
Af6
PS H156
1A40 Vectors
1A40.001 Vector models, Magnetic Field model, Electric Field model, Electromagnetic Field model Three cardboard vector models. 1) A uniform vector field represented by 9 arrows in 3 by 3 array. 2)Single vector represent by an arrow perpendicular to cardboard. 3) Same as 2) except a circle is drawn around the arrow to represent the curl of the vector
Aa3
PS F175
1A40.10 Vector components (3D)-Video Video Encyclopedia : Metal arrows define a three dimensional coordinate system. An arbitrary vector is viewed in three planes.
VE01_07
3_1
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