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.
The Springfield Public School District is the largest district in the state of Missouri with an official fall 2011 enrollment of 24,366 students attending 50 schools. Public high schools include Central High School, Kickapoo High School, Hillcrest High School, Parkview High School, and Glendale High School.