Vortex action? Potential energy being converted to kinetic energy? Centrifugal force? If you‚Äôve never seen the Tornado Tube¬Æ in action you may n...View full details
Student grade bulb thermomer. Ranges from -35 to 50 degress celcius and -30 to 120 degrees fahrenheit. Measured in 2 degree subdivisions. Do not ...View full details
The New Astronomy Book ...View full details
A what? Radiometer is just a fancy name for this Solar Engine. It demonstrates the principles of energy conversion and shows how heat and mechanica...View full details
Waterford's series of Pocket Naturalist Guides to plants, animals, and other aspects of nature highlight the most common, distinctive, and widely d...View full details
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