The large magnitude of solar energy available makes it a highly appealing source of electricity. The United Nations Development Programme in its 2000 World Energy Assessment found that the annual potential of solar energy was 1,575â49,837 exajoules (EJ).
Definition of IRONWOOD. 1. : any of numerous trees and shrubs (as a hornbeam or hop hornbeam) with exceptionally tough or hard wood. 2.: the wood of an ironwood.See ironwood defined for kids.ADVERTISEMENT.. : any of numerous trees and shrubs (as a hornbeam or hop hornbeam) with exceptionally tough or hard wood. 2. : the wood of an ironwood. See ironwood defined for kids.
Iron (Fe) is the second most common metal on Earth, and the most widely-used metal. It is element 26, a transition metal in Group 8. Its symbol is Fe, from the Latin word for iron, ferrum.Its atomic number is 26 and its mass number is 55.85.It is used a lot because it is very strong and cheap.Iron is the main ingredient used to make steel. Raw iron is attracted to magnets, but it is not actually a magnet, however it can be used to make an electromagnet.t is used a lot because it is very strong and cheap. Iron is the main ingredient used to make steel. Raw iron is attracted to magnets, but it is not actually a magnet, however it can be used to make an electromagnet.