How A Transformer Works
19 Feb 2008 A transformer is an electrical device used to convert AC power at a certain voltage level to AC power at a different vol..- 101
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How The Pendulum Works
19 Feb 2008 Have you ever looked inside a grandfather clock or a small mechanical alarm clock, seen all the gears and springs and th..- 101
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Why Toothpaste Repels Water
19 Feb 2008Water has too much surface tension to make bubbles last...they contract on themselves and pop, and the water evapora..
- 103
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Ignition Coil
19 Feb 2008In order to generate as high a voltage as possible at the secondary it is necessary to produce as high a voltage as p..
- 105
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Experiment To Test Why Big Ships Don't Sink
18 Feb 2008 All you need is: * aluminum foil, * a few paper clips, * an empty aquarium (or similar large container)..- 106
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How Layers Of Rocks Help Predict Their Age
18 Feb 2008 When rocks occur as undisturbed layers, we find that the lowest layers will be the oldest and topmost layers will be the..- 106
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How The Chameleon Changes Its Color
18 Feb 2008 Under a chameleon’s outer skin are special skin cells with colour (or pigment) in them. These cells are called chromatop..- 108
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Multicellular Organisms
18 Feb 2008 Increased co-ordination between colonial cells appeared with the evolution of the sponges (Porifera). Sponges may be f..- 105
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Propulsion By Propellers
18 Feb 2008 Moving a vehicle, may it be on the ground, on the water, or in the air, requires a force to overcome the friction and in..- 95
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The First Molluscs
18 Feb 2008 Other kinds of annelids also developed in which the animal did not attach itself to the sea floor but continued to cra..- 99
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Animatronics
16 Feb 2008 Long before digital effects appeared, animatronics was making cinematic history. Who can forget the scare of the Great W..- 103
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Iron And Its History
16 Feb 2008 (Anglo-Saxon, iron; L. ferrum) Iron was used prehistorically: * Genesis mentions that Tubal-Cain, seven generatio..- 102
