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.
Population Metro Area Population: 458,930. Springfield Metropolitan Statistical Area (MSA) 5-county area: Greene, Christian, Webster, Polk and Dallas counties. Source: USDC, Bureau of the Census, 2016. Metro Area Annual Population Growth. 2000-2016 overall growth: 24.1% 2000-2016 annual growth: 1.5%. 2010-2016 overall growth: 5.1% 2010-2016 annual growth: 0.8%