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

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

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

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

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

Cartesian Diver Pictures Stow Girls Get SET Team Summer 2002

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

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

Final Design Stow Girls Get SET Team Summer 2002

Cartesian Diver Prototypes Stow Girls Get SET Team Summer 2002

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

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

Using the Jigsaw Stow Girls Get SET Team Summer 2002

Finding An Adhesive Stow Girls Get SET Team Summer 2002

Building the Diver Base Stow Girls Get SET Team Summer 2002

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

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

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

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

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

Any Questions? Stow Girls Get SET Team Summer 2002