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 is the capital of the U.S. state of Illinois and the county seat of Sangamon County with a population of 116,250, as of the 2010 U.S. Census, making it the sixth most populated city in the state. It is the largest city in central Illinois.