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Physics from the Junk Drawer

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Introduction

Acknowledgements

Motion and Forces (see all activities)

Mass in Motion  (Can You Juggle?)

Human waves

Reaction time chain  (measurement)

Pendulums -- length vs. period

Models of Matter

Martian hat  (Inertia)

Coke Bottle Inertia  (Inertia)

Tug of War  (Forces)

Not popping a balloon with a needle

Friction and Shoes  (Forces)

Egg and sheet  (Forces and momentum)

Collapsing Soft Drink Can  (Strength of Structures)

Falling glass of water  (Weightlessness)

Jumping dime  (Air Pressure)

Holding water in a glass with a card  (Air Pressure)

Center of mass of odd shaped objects

14 nails on one  (Center of Mass)

Water whirled in a circle (Centripetal acceleration)

Picking up a marble with a bottomless cup

The Penny in the Balloon

Multiple ball drop  (Energy)

Pop corn poppers

Electricity and Magnetism (see all articles)

An Electrometer  (Electrostatics)

Positive and negative charges

Jumping grains  (Electrostatics)

An electrostatic "compass"  (Electrostatics) 

An Electrostatic "Slime"

Making a magnet and a magnetic field detector (Magnetism)

Floating needle magnetic field detector

Strength of a bar magnet - concentration of magnetic force

Horseshoe magnet and a keeper - why don't other things stick?

Magnetic field around a coil of wire

Iron in Breakfast Cereal  (Magnetism)

Refrigerator Magnets  (Where is the North Pole?)

Magnetic Force on an Electric Current

Simple Electric Motor  (Electric/Magnetic Forces)

Electrolysis - hydrogen and oxygen production (Electricity and Chemistry)

Sound and Optics (see all articles)

Soda Straw Torsional Waves  (Oscillations)

Soda Straw Flute or Oboe  (Sound)

Corruga Horn  (Sound and the Bernoulli Effect)

Perception of direction with sounds  (Speed of sound)

Disappearing test tube in salad oil (Optics)

Soda straw magnifying glass (Optics) 

Oil on Water (Optics)

Pin Hole Lens (Optics)

Where is It? (Optics)

References for Demonstrations

Physics Concepts and Terms

 

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