Gray (unit) Gray (unit) The gray (symbol: Gy) is a derived unit of ionizing radiation dose in the International System of Units (SI). It is defined as the absorption of one joule of radiation energy per kilogram of matter. It is used as a unit of the radiation quantity absorbed dose which measures the energy deposited in a unit mass at a certain position, and of the radiation quantity kerma, which is the amount of energy that is transferred from photons to electrons per unit mass at a certain position. The corresponding cgs unit to the gray is the rad (equivalent to
Mewbourne College of Earth and Energy Mewbourne College of Earth and Energy The Mewbourne College of Earth and Energy is the earth science unit at the University of Oklahoma in Norman. Currently, the school has an enrollment of 931 students, of which 728 are undergraduates and 203 are graduates. The College was chartered on January 1, 2006 under a reorganization. The College includes two schools: the Mewbourne School of Petroleum and Geological Engineering and the ConocoPhillips School of Geology and Geophysics, and the Oklahoma Geological Survey (a state agency mandated by the Oklahoma Constitution). The main offices for the College are located in Sarkeys Energy Center