The number of semester credit hours required for an associate degree depends on the college and degree program. In general, an associate degree takes two years full time and represents half the work required for a bachelor's degree.
A dekatherm (dth) is a unit of energy used primarily to measure natural gas, developed in about 1972 by the Texas Eastern Transmission Corporation, a natural gas pipeline company. It is equal to 10 therms or 1,000,000 British thermal units (MMBtu).
1. n. [Geology] 1  A low-density, high-API gravity liquid hydrocarbon phase that generally occurs in association with natural gas. Its presence as a liquid phase depends on temperature and pressure conditions in the reservoir allowing condensation of liquid from vapor.