While Nevada covers California from the east, Pacific Ocean encircles the state from the western corner. The southern front of California shares its boundaries with Mexican state of Baja California Norte and Oregon surrounds it from the north.hile Nevada covers California from the east, Pacific Ocean encircles the state from the western corner. The southern front of California shares its boundaries with Mexican state of Baja California Norte and Oregon surrounds it from the north.
Disk and disc are the two alternative spellings of the descriptive word for things of a generally thin and circular geometry. These variations are due to the way in which the words originated.
Optical discs are usually between 7.6 and 30 cm (3 to 12 in) in diameter, with 12 cm (4.75 in) being the most common size. A typical disc is about 1.2 mm (0.05 in) thick, while the track pitch (distance from the center of one track to the center of the next) ranges from 1.6 Âµm (for CDs) to 320 nm (for Blu-ray discs).n optical disc is designed to support one of three recording types: read-only (e.g.: CD and CD-ROM), recordable (write-once, e.g. CD-R), or re-recordable (rewritable, e.g. CD-RW).