Fundamentally, momentum conservation is linked to invariance under space translations. See Noether's theorem. If you want to find a system that does not conserve momentum you should look for situations where space is not uniform, e.g. balls rolling on the surface of a bowl, a planetary system (when the dynamics of the sun is neglected), etc.
Socorro is a city in Socorro County in the U.S. state of New Mexico. It is in the Rio Grande Valley at an elevation of 4,579 feet (1,396 m). In 2012 the population was 8,906.
Most / Least Educated Cities in NM. As of 2010-2014, the total population of Sierra County is 11,774, which is 11.27% less than it was in 2000. The population growth rate is much lower than the state average rate of 14.35% and is much lower than the national average rate of 11.61%.