# Properties of Matter

## C7-16: HAPPY AND UNHAPPY BALLS

Category: C7 Collisions
Purpose: Illustrate coefficient of restitution.

## C7-14: COLLISIONS OF BALLS WITH FLOOR

Category: C7 Collisions
Purpose: Illustrate collisions of different balls with the floor.

## C8-13: BUNGEE JUMPER MODEL

Purpose: Determine the minimum value of the spring constant of a bungee rope to ensure a safe jump.

## A1-03: DENSITY - VARIOUS BRICKS

Purpose: Demonstrate the concept of density

## C8-11 INTERNAL VS. EXTERNAL ENERGY - SPRING-COUPLED SUPERBALLS

Purpose: Shows that when energy disappears from the center of mass motion it may be converted into internal energy

## C7-17 SUPERBALL

Category: C7 Collisions
Purpose: Illustrates nearly elastic collisions

## B4-01 HOOKE'S LAW

Category: B4 Elasticity
Purpose: Demonstrate the linear relationship between force and stretching for a simple spring.
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• #### I3-02: BAROMETER - WEIGHT PARADOX

Show how a barometer really works using a counterintuitive problem. Read More
• #### I3-03: GALILEO'S THERMOSCOPE

Measure very small pressure changes. Read More
• #### I3-04: GALILEAN THERMOMETER

Illustrate a very heat-sensitive device. Read More
• #### I3-10: LUNG FUNCTION MODEL

Show how air pressure differences cause the lungs to expand and contract. Read More
• #### I3-11: WATER BAROMETER - BOTTLE COLLAPSE

Demonstrate the pressure in a water column. Read More
• #### I3-12: WATER BAROMETER - CAN CRUSHER

Illustrate a result of atmospheric pressure. Read More
• #### I3-13: INVERTED GLASS OF WATER

Show one result of atmospheric pressure. Read More
• #### I3-14: MAGDEBURG HEMISPHERES

Demonstrate force arising from the atmospheric pressure of air. Read More
• #### I3-15: MAGDEBURG HEMISPHERES - PORTABLE

Demonstrate forces arising from atmospheric air pressure. Read More
• #### I3-16: COLLAPSE OF CAN - LARGE PUMP

Demonstrate the forces created by atmospheric air pressure. Read More
• #### I3-17: COLLAPSE OF CAN - PORTABLE PUMP

Demonstrate the forces created by atmospheric air pressure. Read More
• #### I3-18: VACUUM BAZOOKA

Illustrate one effect of atmospheric pressure and force. Read More
• #### I3-19: LIFTING USING ATMOSPHERIC PRESSURE

Dramatically demonstrate an effect of air pressure. Read More
• #### I3-20: COLLAPSE OF CAN - LARGE CAN WITH MALLET

Demonstrate collapse of a can by atmospheric pressure. Read More
• #### I3-31: IDEAL GAS LAW - VOLUME OF ONE MOLE

Demonstrate that one mole of gas occupies 22.4 liters at STP. Read More
• #### I3-32: ISOBARIC EXPANSION OF AIR

Demonstrate expansion of air without change in pressure. Read More
• #### I3-33 HELIUM BALLOON ON LIQUID NITROGEN

Demonstrates how a gas contracts when cooled Read More