Well-known industry author and instructor Jim Johnson is offering a new video for technicians who want to sharpen their troubleshooting skills. "This HVAC training video program, is available in DVD ...
Until 1628 few Europeans disputed the teachings of Galen, an accomplished Greek physician and scholar. Galen lived in the second century A.D., and his teachings would come to dominate European ...
Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
A schematic diagram for the three constituent parts of Earth system science and their functional elements A schematic diagram for the behavior of physical, chemical and biological interactions within ...
The skeleton allows movement, provides support and protection for vital organs and makes blood cells. Skeletal muscles move the bones in the body. The skeletal system is made from bones and joints.
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