This mineral has a vitreous to dull luster and varies in color from black to dark green, cleaves in two directions, has a hardness of 5 - 6 and produces a white to colorless streak, has a specific gravity of 2.9. What is this mineral?

The physical processes that create most of earth's physical features, including mountains, are known as

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.

Macbeth and lady macbeth are partners in the nurder of duncan and both become