Perfectly elastic collisions are those in which no kinetic energy is lost in the collision. Macroscopic collisions are generally inelastic and do not conserve kinetic energy, though of course the total energy is conserved as required by the general principle of conservation of energy.
Ector, Texas. Not to be confused with Ector County, Texas. Ector is a city in Fannin County, Texas, United States. The population was 695 at the 2010 census, up from 600 at the 2000 census.
Over 35,897,000 barrels of oil were taken from Ector County lands in 1990; between 1926, when oil was first discovered in the county, and 1990 the county produced 2,726,524,140 barrels of petroleum, making it the second most productive oil county in Texas.