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.
Addendum #2 to 2016-2020 Financial Outline - Debt Service/Operating Leases. The Township is located in the Upper Bucks region and borders Northampton and Lehigh Counties. It consists of 30.8 square miles. As of 2010 census, the population of Springfield Township was 5,035. Image Copyright (c)2006 Derek Ramsay (from U.S. Bureau Source) (GFDL 1.2)