What does it mean to say that momentum is conserved? when momentum or any other object in physics doesn't change..... momentum = momentum before and after the collision. Elastic collision
The 2016 Springfield, Illinois, population is 116,565. There are 1,955 people per square mile (population density). The median age is 38.7. The US median is 37.4. 44.11% of people in Springfield, Illinois, are married. 14.83% are divorced.
Springfield has a violent crime rate of 971.56 with a population of 117,131. In 2012, there were 1,138 violent crimes in Springfield with 10 murders, 76 cases of forcible rape, 260 robberies and 792 aggravated assaults.