# PHYS121

## I6-52: ENTROPY - FOUR BALLS IN GAS DIFFUSION MODEL

Purpose: Demonstrate that an ordered state is statistically possible.

## I6-33: MOLECULAR MOTION DEMO - GAS PRESSURE

Purpose: Model gas pressure.

## I4-19: CONDENSATION OF STEAM - SODA CAN COLLAPSE

Purpose: Surprising demonstration using condensation of steam.

## I3-52: CONSTANT VOLUME GAS THERMOMETER - ABSOLUTE ZERO

Category: I3 Gases
Purpose: Determine the value of absolute zero.

## I3-19: LIFTING USING ATMOSPHERIC PRESSURE

Category: I3 Gases
Purpose: Dramatically demonstrate an effect of air pressure.

## I3-12: WATER BAROMETER - CAN CRUSHER

Category: I3 Gases
Purpose: Illustrate a result of atmospheric pressure.

## I2-27: THERMAL EQUILIBRIUM BETWEEN ALUMINUM AND COPPER

Purpose: Show process of thermal equilibrium happening between touching aluminum and copper cylinders.

## I1-01: THERMOMETERS

Purpose: Show several types of thermometers.

## F4-11: LAMINAR AND TURBULENT FLOW OF AIR

Category: F4 Fluid in Motion
Purpose: Demonstrate laminar and turbulent flow.

## F4-01: VISCOSITY OF LIQUIDS

Category: F4 Fluid in Motion
Purpose: Compare the viscosities of water and mineral oil.

## F2-13: BOUYANCY - EXPANDING BALLOON CONUNDRUM

Category: F2 Buoyancy
Purpose: Conundrum involving weight of an expanding balloon.

## F2-07: BUOYANCY - PEPSI AND DIET PEPSI

Category: F2 Buoyancy
Purpose: Show the difference in density between soft drinks with and without sugar.

## 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?"

## F1-11: HYDRAULIC PRESS

Purpose: Demonstrate dramatically Pascal's Law and the large forces attainable using hydraulic systems.

## F1-05: DOES WATER SEEK ITS OWN LEVEL?

Purpose: A trick to challenge the students.

## F1-04: EQUILIBRIUM TUBES

Purpose: Demonstrate that pressure is transmitted equally throughout a fluid.

## F1-02: FLUID PRESSURE VS DEPTH - ANEROID GAUGE

Purpose: Show water pressure versus depth with an aneroid gauge.

## D2-05: DUMBBELL - VARIABLE MOMENT OF INERTIA

Purpose: Demonstrate the effect of moment of inertia.

## B4-14: ELASTIC LIMIT OF WIRE

Category: B4 Elasticity
Purpose: Demonstrate the variation in tensile strength with wire diameter.
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• #### C6-01 INCLINED PLANE - FRICTION BOX AND WEIGHTS

Shows that the coefficient of friction does not depend upon the mass of the object although the frictional force does. Read More
• #### C6-02: INCLINED PLANE - FRICTION BLOCK

Demonstrates that the coefficient of static friction is greater than the coefficient of sliding friction, and determines the coefficient of Read More
• #### C6-03: INCLINED PLANE - FRICTION WITH THREE BLOCKS

Illustrate different coefficients of friction. Read More
• #### C6-04: FRICTION DIRECTION ON INCLINED PLANE

Determine the direction of the frictional force in a possibly ambiguous situation. Read More
• #### C6-05: AIR TRACK - INCLINED PLANE FRICTION

Show that the force of friction depends upon the conditions of the surfaces in contact. Read More
• #### C6-11: SLIDING FRICTION - LECTURE TABLE AND FELT

Show the effect on frictional force of velocity, normal force, and contact area. Read More
• #### C6-12: SKIDDING AUTOMOBILE

Demonstrate the effect of locked wheels on vehicle stability. Read More
• #### C6-13: FRICTION BETWEEN GLASS SURFACES

Demonstrate the increase of friction between two glass surfaces when lubricating surface films are removed. Read More
• #### C6-14: SOCIAL CLIMBER

Illustrate frictional forces in a weird way. Read More
• #### C6-15: SOCIAL DESCENDER - FRICTION TOY

Illustrate frictional forces in a weird way. Read More
• #### C6-16: SLIDING AND STATIC FRICTION

Show that the friction force depends linearly on the normal component of the applied force. Read More
• #### C6-17: FRICTION VS. PULLING ANGLE

Demonstrate how pulling angle affects the frictional force Read More
• #### C6-21: SUSPENDED ROD ON WATER

An elementary problem involving horizontal friction. Read More
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