# 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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• #### P4-04: COSMIC RAYS

Demonstrate the existence of cosmic rays. Read More
• #### P4-05: PHOTOMULTIPLIER TUBE - LARGE

Show them what a large photomultiplier tube looks like. Read More
• #### P4-06 RADIOACTIVE CONSUMER PRODUCTS

Show some consumer products and naturally occurring materials that are weakly radioactive Read More
• #### P4-07: SHRINK TUBE - IRRADIATED POLYMER

Demonstrate properties of shrink tube. Read More
• #### P4-08: IONIZATION SMOKE ALARM

Demonstrate how a smoke alarm works. Read More
• #### P4-11 RADIOACTIVE DECAY - DICE

Illustrates the radioactive decay of a sample of nuclei. Shows how a half-life is determined Read More
• #### P4-21: NUCLIDES CHART

Use chart of the nuclides in small class groups. Read More
• #### P4-31: CLOUD CHAMBER - INDIVIDUAL VIEWING

Observe alpha and beta particle paths with a cloud chamber. Read More
• #### P4-33: BUBBLE CHAMBER TRACKS - THREE DIMENSIONAL VIEWMASTER

Allow individual viewing of bubble chamber tracks in three dimensions. Read More
• #### P4-41: RUTHERFORD SCATTERING MODEL

Show difference in scattering from the Thompson and Rutherford models of the nucleus. Read More
• #### P4-51: MILLIKAN OIL DROP MODEL

Demonstrate geometry for the Millikan oil drop experiment. Read More
• #### P4-61: CHAIN REACTION MODEL

Demonstrate a molecular chain reaction, either controlled or uncontrolled. Read More
• #### P4-62: CHAIN REACTION - MOUSE TRAP VIDEO

Model of uncontrolled nuclear chain reaction. Read More
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