Smelting is a form of extractive metallurgy; its main use is to produce a metal from its ore. This includes production of silver, iron, copper and other base metals ...
A solar cell (also called a photovoltaic cell) is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect. It is a ...
The Energy Story is a general introduction to energy. Chapters explore renewable energy, fossil fuels, electricity, circuits and many other things.
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stem 1 (st m) n. 1. a. The main ascending axis of a plant; a stalk or trunk. b. A slender stalk supporting or connecting another plant part, such as a leaf or flower.
In the Spotlight How to Make A Consistent, Healthy Income At Hubpages. Here is the question I am asked over and over again. "Is it worth it for me to put my time and ...