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.
Population of Mexico 2015. As of 1 January 2016, the population of Mexico was estimated to be 127 927 966 people. This is an increase of 1.37 % (1 726 437 people) compared to population of 126 201 529 the year before. In 2015 the natural increase was positive, as the number of births exceeded the number of deaths by 1 833 708.