The escape velocity is a way of measuring the exact amount of energy needed to reach the lip of the well -- and have no energy left over for walking away. When a ball is thrown up into the air from the surface of the Earth, it does not have enough energy to escape. So it falls back down.
The American Chestnut is a large, broad tree that produces an edible chestnut. Large leaves turn yellow and brown in autumn. At least two American Chestnuts planted no more than 200' apart are required for producing chestnuts.This tree was very common before blight wiped out most of them in the early 1900's.ur pure American Chestnuts come from mature parents who have survived the blight and are producing chestnut seeds. For now, the possibility of American Chestnuts getting the blight sometime in their life is a real possibility.
The American chestnut (Castanea dentata) is a large, monoecious deciduous tree of the beech family native to eastern North America.[1] Before the species was devastated by the chestnut blight, a fungal disease, it was one of the most important forest trees throughout its range, and was considered the finest chestnut tree in the world.[2] It is ...