Flat hole

1. In a semiconductor atom, the vacancy resulting from the loss of an electron. When an electron is lost, so is its negative charge, leaving an equivalent net positive charge. ...

hole

Energy; Solar power

The vacancy where an electron would normally exist in a solid; behaves like a positively charged particle.

hole

Energy; Energy efficiency

The vacancy where an electron would normally exist in a solid; behaves like a positively charged particle.

asteroid mining

Mining; General mining

The future industry of sending spacecraft to asteroids in order to harvest their natural resources and bring them back to civilization for use. On April 24th 2012, the first real ...

rock

Mining; General mining

A mineral that forms inside the earth as marble and granite are rocks; a huge amount of stone that forms a cliff or mountain is called as rock.

beryl

Mining; General mining

A greenish mineral that usually lets light shine through it and is found mostly in igneous and metamorphic rocks.

corundum

Mining; General mining

A very hard mineral made mainly of aluminum and oxygen. Rubies and sapphires are types of corundum.

feldspar

Mining; General mining

A mineral that makes up more than 60 percent of the Earth's crust. The pink and white flecks in granite consist of feldspar.

geode

Mining; General mining

A hollow, rounded rock that is lined on the inside with crystals is called geode.

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Industry/Domain: People Category: Politicians

Omar Suleiman

The former Egyptian Vice President under Hosni Mubarak, as well as an army general, politician, diplomat, and intelligence officer. He was appointed ...