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Physics in a box
“Experiments for High Schools”
Jitka Houfková, Dana Mandíková
Department of Physics Education
Faculty of Mathematics and Physics
Charles University Prague
The box overview
Physics in a box – [email protected], dana.mandí[email protected] 1
Mechanics
Looking for a centre of mass
Playing with a centre of mass
Moving a paper with the box Pulling a paper out from underneath the box
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Let the box fall forwards Let the box fall backwards
An airscrew A little rocket
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Exploring the properties of a pendulum
Friction and ball bearing
Get the cork into the middle of the box without touching it
Drinking with a drinking straw Holding water in a strawPhysics in a box – [email protected], dana.mandí[email protected] 4
A ship with a soap motor A ship from Play-Doh
Chromatography
Electrostatics
An electrically charged drinking straw is “glued” to the box and to the wall
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An indicator of electric charge Electrostatic shielding by the box
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An electrically charged drinking straw attracts the box and knocks it down without touching it
Electrically charged drinking strawscan attract or repulse each other
Electromagnetism
A circuit connected via people – no one has an infinite resistance Graphite is a conductor
An electromagnet An electromotor
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An electromagnetic brake – works with copper, does not work with paper
A magnet and an aluminium cylinder falling through a copper tube
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Magnets
A compass Torsional oscillations Dana with magnetic powers
How a magnet attracts a paper clip through different materials (air, paper, metal)
Thermodynamics
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A burning match with an aluminium collar
Putting out a candle and lighting it again by a metallic spiral Lighting a candle from a distance
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Heat transfer in a metallic box
A bimetallic strip
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A flying tea bag
Thermosensitive Play-Doh
Acoustics
A whistle from a drinking straw A whistle from a preserving lid A guitar
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Optics
A mirror
Rainbow reflections on a piece of CD
Looking through polarisation filters at a string and at a pattern from adhesive tape
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A projection of a candle flame through a tiny hole Looking through different optical grids
A magnifying glass A telescope
A strange monster A dog A cat
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Optical illusion – make the sun smile
Nuclear Physics
Modelling of the radioactive decay – the number of nuclei in a sample of a radioactive element (lentils) as a function of time (tossin the lentils)
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Quantum Mechanics
The non-commutativity of operators “pour water into” the box and “close the lid of” the box
And much much more can be done ;-) …
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