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.
Socorro is a very popular first name for women (#673 out of 4276, Top 16%) and also a very popular surname for both adults and children (#39304 out of 150436, Top 26%). Socorro was first listed in 1910-1919 and reached its apex position of #666 in the U.S. in the 1920s, but is not found in the list at the moment.