# Needs New Photo

## G4-12: STANDING WAVES ON A SOAP FILM

Purpose: Demonstrate standing waves in a circular membrane.

## C5-51: BALLISTOCARDIOGRAPHY

Purpose: Demonstrate the science of ballistocardiography

## C5-41: HOURGLASS PROBLEM

Purpose: Demonstrate the solution to the famous "hourglass problem," or Galileo's water bucket

## C5-31: AIR TRACK - SAILING UPWIND

Purpose: Show how force components can be used to sail against the wind.

## C5-20: PUTT PUTT STEAM BOAT

Purpose: Demonstrate action-reaction using an intriguing device.

## C5-16: HERO'S ENGINE

Purpose: Demonstrate action and reaction in a rotational system.

## C5-11: AIR TRACK - ACTION-REACTION PAIRS

Purpose: Demonstrate Newton's third law of motion

## C5-01: NEWTON'S THIRD LAW - STATIC DYNAMOMETERS

Purpose: Demonstrate action-reaction in the static case

## L1-22: OPTICAL BOARD - PINHOLE CAMERA

Purpose: Demonstrate how a pinhole "image" is formed.

## C4-61: ACCELERATION ON A SCALE

Purpose: Illustrate forces in an accelerating system.

## C4-43: TERMINAL VELOCITY - STACKED COFFEE FILTERS

Purpose: Illustrate terminal velocity quantitatively.

## C4-41: TERMINAL VELOCITY - BOTTLE IN TUBE

Purpose: An easily observable terminal velocity experiment.

## C4-32: FREE FALL IN VACUUM - DISK AND FEATHER

Purpose: Demonstrate that bodies of extremely different densities fall with equal acceleration in the absence of air friction.

## C4-31: AIR TRACK - THE ACCELERATION OF GRAVITY

Purpose: Experimentally determine the acceleration of gravity.

## C4-23: ATWOOD MACHINE WITH HEAVY PULLEY

Purpose: Illustrate the affect of a heavy pulley on the Atwood Machine.

## C4-22: HORIZONTAL ATWOOD MACHINE

Purpose: Demonstrate the Horizontal Atwood Machine quantitatively.

## C4-15: HELIUM BALLOON IN ACCELERATED BOX

Purpose: Illustrate the affect of density on acceleration in a counterintuitive way.

## C4-14: AIR TRACK - ACCELEROMETER

Purpose: Demonstrate the behavior of a liquid accelerometer.

## C4-13: ACCELEROMETER ON ROTATOR

Purpose: Show that the surface of a rotating liquid assumes a parabolic shape.

## C4-12: ACCELEROMETER ON INCLINED PLANE

Purpose: Illustrate the behavior of a liquid accelerometer accelerating down an inclined plane.
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• #### C3-01: INERTIA - SMALL STEEL BALL

Demonstrate inertia of rest Read More

• #### C3-04: INERTIA - LEAD BRICK AND HAND

Illustrates inertia of rest Read More

• #### C3-06: INERTIA: JENGA

Demonstrate inertia of rest. Read More
• #### C3-11: STRAW AND POTATO

Illustrate inertia of motion Read More