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.
SCURRY COUNTY. SCURRY COUNTY. Scurry County (E-19) is at the base of the Llano Estacado in West Texas, bordered on the east by Fisher County, on the south by Mitchell County, on the west by Borden County, and on the north by Garza and Kent counties.