# Needs New Photo

## F2-23: BUOYANCY PARADOX - INVERTED BLOCK

Category: F2 Buoyancy
Purpose: Illustrate buoyancy in a paradoxical way.

## F2-22: BUOYANCY PARADOX - ACCELERATED FRAME

Category: F2 Buoyancy
Purpose: Illustrate dramatically the concept of buoyancy.

## F2-11: HYDROMETER

Category: F2 Buoyancy
Purpose: Measure the density of a liquid.

## F2-10: BUOYANT BUBBLES

Category: F2 Buoyancy
Purpose: Demonstrate buoyancy and diffusion in an interesting way.

## F2-04: BUOYANCY - SPHERE AND WATER

Category: F2 Buoyancy
Purpose: Challenge the students' thinking about the buoyant force by considering the question: "Will a round object, without a flat top and bottom surface, experience a buoyant force, as does a cylinder?"

## F2-03: CARTESIAN DIVER - EXPLICIT VERSION

Category: F2 Buoyancy
Purpose: Demonstrate explicitly how a cartesian diver works by showing how the water enters the diver when the pressure in the cylinder is increased.

## N3-41: SPLITTING OF SPECTRUM INTO COMPLEMENTARY COLORS

Category: N3 Color
Purpose: Show complementary colors by removing a band from the white light spectrum.

## N3-33: MAXWELL'S EXPERIMENT - THREE-COLOR MIXING

Category: N3 Color
Purpose: Demonstrate three-color mixing with positive colors.

## N3-31: COLOR SEPARATION TRANSPARENCIES

Category: N3 Color
Purpose: Illustrate color mixing of negative color transparencies.

## F1-21: LIPLESS STRAW

Purpose: Demonstrate the role of atmospheric pressure in the operation of a drinking straw.

## F1-15: PRESSURE GLOBE

Purpose: To illustrate several interesting phenomena related to air pressure

## F1-14: PISTON DIAMETER VS TRAVEL - WORKING MODEL

Purpose: Show that with an incompressible fluid the bigger piston moves more slowly than the smaller piston.

## D5-24: ROTATING PENDULA - LENGTH VS. HEIGHT

Purpose: Show that pendula of different length suspended from the same point rotating at the same angular speed rise to the same vertical height.

## D5-23: ROTATING BEAD ON LOOP

Purpose: Demonstrate the presence of a "critical parameter" which determines the dynamic behavior of a simple physical system.

## D5-22: ROTATING PENDULUM

Purpose: Demonstrate the presence of a "critical parameter" which determines the dynamic behavior of a simple physical system.

## D5-21: BALL ROLLING ON ROTATING DISC

Purpose: Show that a sphere rolling on a rotating disc will move in circles.

## F1-13: CONSTANT WATER PRESSURE

Purpose: Demonstrate a mechanism which produces a constant water pressure.

## F1-12: PASCAL'S LAW - COILED TUBE PARADOX

Purpose: Illustrate Pascal's law in a dramatic way.

## D5-12: CORIOLIS EFFECT - WATER JET

Purpose: Model the Coriolis effect.

## D5-11: CORIOLIS EFFECT - BALL ON ROTATING PLATFORM

Purpose: Illustrate the Coriolis effect.
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• #### D3-01 MASSES SLIDING ON ROTATING CROSSARM

Illustrates conservation of angular momentum Read More
• #### D3-02: MASS ON STRING - ORBITS WITH VARYING RADIUS

Illustrates conservation of angular momentum Read More
• #### D3-03 ROTATING CHAIR AND WEIGHTS

Illustrates conservation of angular momentum Read More
• #### D3-04: ROTATING STOOL AND WEIGHTS

Demonstrate conservation of angular momentum. Read More
• #### D3-05 ROTATING CHAIR AND BICYCLE WHEEL

Illustrates conservation of angular momentum Read More
• #### D3-06: ROTATING CHAIR - HELICOPTER MODEL

Demonstrate conservation of angular momentum Read More
• #### D3-07: ROTATING PLATFORM

Demonstrate rotational kinematics and inertia. Read More
• #### D3-12: SWING MODEL

Model the pumping of a swing using conservation of angular momentum. Read More
• #### D3-21: INVERSE SPRINKLER - GLASS MODEL

This is a non-working sprinkler that was used for data in an American Journal of Physics paper. Read More
• #### D3-22: INVERSE SPRINKLER - METAL MODEL

Demonstrate the Feynman inverse sprinkler effect. Read More
• #### D3-31: AIR TABLE - TETHERBALL

Show qualitatively an example of non-conservation of angular momentum. Read More
• #### D3-32: KEYWHIP

Demonstrate angular momentum conservation in a surprising way. Read More
• #### D3-33: Centripetal Acceleration - Rotating Ball and Brick

Illustrate centripetal force and its relationship to velocity and radius. Read More
• #### D3-41: AIR TABLE - RECTANGULAR PUCK COLLISIONS

Qualitatively show conservation of angular momentum in collisions of a circular puck with a rectangular puck. Read More
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