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 Illinois Department of Human Services has two main offices. One is located in Springfield and the other in Chicago. The office in Springfield is located at 100 South Gra â¦ nd Avenue East and the zip code there is 62762.