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 population of Springfield proper grew 16 percent from 1980 to 2010, and it's projected to grow another 14 percent by 2040. An aging population â baby boomers want to be closer to health care and other services â commute times and slower population growth are said to be among the factors.