1. Density Diver A Cartesian Diver Exhibit
Ashley, Marina, Devin, Marie, Samantha, Michelle, Holly
Stow Girls Get SET Team
Summer 2002

2. Contents Why Cartesian Divers? Construction of a Simple Diver
How Does a Cartesian Diver Work?
What Scientific Properties Does This Teach?
Evolution of Our Design
Cartesian Diver Prototypes
Final Exhibit
Stow Girls Get SET Team
Summer 2002

3. Why Cartesian Divers? Subject of density found interesting
Evolved from previous idea
Needed an exhibit for the water room
Subject was well known by group
Stow Girls Get SET Team
Summer 2002

4. Construction of a Simple Diver
Fill a bottle with water
Put a partially filled test tube upside down in the bottle
Make sure it floats just above the water
Seal the bottle and apply pressure
More water goes into the diver so it is more dense and goes down
Now you have a Cartesian diver
Stow Girls Get SET Team
Summer 2002

5. How Does a Cartesian Diver Work?
Diver floats because it is less dense than water
Pressure is applied
Diver becomes more dense than water
Diver floats to top when pressure is released
That’s a Cartesian Diver!
Stow Girls Get SET Team
Summer 2002

6. Cartesian Diver Pictures
Stow Girls Get SET Team
Summer 2002

7. The Scientific Properties of Our Density Diver
Density is the amount of mass in a certain amount of volume
Pressure
“The application of continuous force by one body on another.”
Simple Machines (Levers and Pistons)
p = m / V
P V = m R T
Stow Girls Get SET Team
Summer 2002

8. Evolution of the Design
Stomp diver
Sit-down diver
Push-piston diver
Side-Lever diver
Final design: Pull-Rope diver
Stow Girls Get SET Team
Summer 2002

9. Final Design
Stow Girls Get SET Team
Summer 2002

10. Cartesian Diver Prototypes
Stow Girls Get SET Team
Summer 2002

11. Final Exhibit Four foot high acrylic tube Lever system Wooden base/box
Stow Girls Get SET Team
Summer 2002

12. Parts One 4’ X 12 ½” acrylic tube
One clear cast acrylic sheet 1.25” thick,12” X 24”
One natural latex rubber 1/8” thick,24” X 24”, 38A durometer
Screws, nuts, and bolts
Final Exhibit built
Stow Girls Get SET Team
Summer 2002

13. Using the Jigsaw
Stow Girls Get SET Team
Summer 2002

14. Finding An Adhesive
Stow Girls Get SET Team
Summer 2002

15. Building the Diver Base
Stow Girls Get SET Team
Summer 2002

16. Building the Lever and Stand
Stow Girls Get SET Team
Summer 2002

17. Future of Our Exhibit Transported to the Acton Science Museum
Bolted to the wall
Spring attached from the lever to the ceiling
Test other rubber membranes
Colorful Divers
Stow Girls Get SET Team
Summer 2002

18. Thanks! Bob Lind and Kathy Bufalo
for teaching us all about wood working
Jim Hoffman, Vincent Miraglia and Mike
for solving machining and general problems
Colby Shop - Larry, Dennis and Scott
for putting our acrylic job in front of others in the machine shop
Stow Girls Get SET Team
Summer 2002

19. Thanks! Haruna Tada, Peter Wong and Ioannis Miaoulis
For offering guidance and support
Lisa Franz, and Denise Leblanc
For motivational support
Stow Girls Get SET Team
Summer 2002

20. Thanks!
Debbie Barr
For motivational support, organizational efforts, and fun activities
Geoff Nelson
For being a highly enthusiastic and critical client
Stow Girls Get SET Team
Summer 2002

21. Any Questions?
Stow Girls Get SET Team
Summer 2002