How The Pendulum Works
19 Feb 2008Have you ever looked inside a grandfather clock or a small mechanical alarm clock, seen all the gears and springs and thought, "Wow -- that's complicated!"? While clocks normally are fairly complicate...
ERNEST SENAYA
ERNEST SENAYA:
speeches
Why Toothpaste Repels Water
19 Feb 2008
Water has too much surface tension to make bubbles last...they contract on themselves and pop, and the water evaporates fast too. But soap (and the soapy substances in toothpaste, etc., which are ...
- 103
speeches
Ignition Coil
19 Feb 2008
In order to generate as high a voltage as possible at the secondary it is necessary to produce as high a voltage as possible at the primary. This is because the secondary voltage is just the turns ...
- 105
general-articles
The Dragon Fly
18 Feb 2008The characteristics of six legs and a body divided into three parts became numerically the most successful group of animals: the insects. Although ancestral insects probably climbed about the vegetati...
- 341
general-articles
The Sticky Tongues Of Lizards
18 Feb 2008They are all carnivorous, and indeed some are quite formidable such as the horned toads (Family Leptodactylidae) which can easily prey on a nestling bird or a small vertebrate such as a mouse. Alt...
- 328
general-articles
The Thrust Of An Airplane
18 Feb 2008Thrust is the force which moves an aircraft through the air. Thrust is used to overcome the drag of an airplane, and to overcome the weight of a rocket. Thrust is generated by the engines of the air...
- 278
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