# Engineering

Category: K7 RLC Circuits
Purpose: Demonstrate a barricade flasher circuit.

## K2-47: SPEEDOMETER MODEL

Purpose: Demonstrate operating principle of some speedometers.

## J7-31: VISIBLE HARD DRIVE

Purpose: See what the guts of a fixed magnetic drive look like.

## F5-31: MAGNUS EFFECT - FLETTNER'S SHIP

Purpose: Demonstrate the Magnus effect.

## G1-54: MASS'S DOUBLE PENDULUM

Purpose: Demonstrate the transition of potential energy into energy of oscillation of the pendulum, and the operation of an escapement.

## F4-53: ARCHIMEDES' SCREW

Category: F4 Fluid in Motion
Purpose: Demonstrate a pump mechanism invented by Archimedes.

## F4-51: VACUUM PUMP MODEL

Category: F4 Fluid in Motion
Purpose: Illustrate how a mechanical vacuum pump works.

## F2-12: HOT AIR BALLOON

Category: F2 Buoyancy
Purpose: Show that hot air is less dense than cold air by operating a hot air balloon.

## 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.

## F1-11: HYDRAULIC PRESS

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

## D4-23: GYROCOMPASS

Category: D4 Gyroscopes
Purpose: Illustrate the operation of the gyrocompass.

## D4-21: SHIP STABILIZER

Category: D4 Gyroscopes
Purpose: Demonstrate how a gyroscope can stabilize the rocking of a ship.

## D2-12: TOPPLING CHIMNEY

Purpose: Demonstrate how a toppling chimney breaks up.

## B4-14: ELASTIC LIMIT OF WIRE

Category: B4 Elasticity
Purpose: Demonstrate the variation in tensile strength with wire diameter.

## E2-42: TELESCOPE MODEL

Category: E2 Astronomy
Purpose: Show how a telescope can view any point in the sky using a universal mount.

## B1-16: CORBELED ARCH

Purpose: Illustrate how the center of mass affects the stability of an arch

## A2-32: HEIGHT MEASUREMENT BY TRIGONOMETRY

Category: A2 Mathematics
Purpose: Determine the height of a student using trigonometry

## A1-43: CROSSING RODS

Purpose: Visualize three-dimensional figures

## A1-42: DRAWING PUZZLE - HALF CUBE

Purpose: Visualize three-dimensional figures

## A1-41: DRAWING PUZZLE - INTERSECTING RODS

Purpose: Visualize three-dimensional figures
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• #### F2-01 ARCHIMEDES' PRINCIPLE

Demonstrates the buoyant force on a body submerged in a fluid to be equal to the weight of the displaced Read More
• #### F2-02: CARTESIAN DIVER

Demonstrate a variety of fluid mechanics phenomena, including the compressibility of a gas, the incompressibility of water, Boyle's law, Pascal's Read More
• #### F2-03: CARTESIAN DIVER - EXPLICIT VERSION

Demonstrate explicitly how a Cartesian diver works by showing how the water enters the diver when the pressure in the Read More
• #### F2-04: BUOYANCY - SPHERE AND WATER

Challenge the students' thinking about the buoyant force by considering the question: "Will a round object, without a flat top Read More

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

Show the difference in density between soft drinks with and without sugar. Read More
• #### F2-08: BUOYANCY - BATTLESHIP IN BATHTUB

Illustrate Archimedes' Law in a counterintuitive manner. Read More
• #### F2-10: BUOYANT BUBBLES

Demonstrate buoyancy and diffusion in an interesting way. Read More
• #### F2-11: HYDROMETER

Measure the density of a liquid. Read More
• #### F2-12: HOT AIR BALLOON

Show that hot air is less dense than cold air by operating a hot air balloon. Read More
• #### F2-13: BOUYANCY - EXPANDING BALLOON CONUNDRUM

Conundrum involving weight of an expanding balloon. Read More
• #### F2-21 REACTION TO BUOYANT FORCE

Demonstrates the reaction force using a liquid. Read More
• #### F2-22: BUOYANCY PARADOX - ACCELERATED FRAME

Illustrate dramatically the concept of buoyancy. Read More

• #### F2-26: BUOYANCY PARADOX - BALL IN TWO LIQUIDS

Demonstrate buoyancy with a counterintuitive element. Read More

• #### F2-31: BUOYANT BALLS IN BEANS

Illustrate buoyancy in a surprising way. Read More
• #### F2-32: FLOATING SQUARE BAR

Illustrate buoyancy and the orientation in which a long square bar floats in a very dramatic way. Read More
• #### F2-41: DENSITY - SLOPE OF MASS VS VOLUME GRAPH

Determine the density of water. Read More
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