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.
List of Largest Cities in Illinois. Illinois is the State in United State located at Midwestern part of the country, is 5th populous state (12, 88,135 estimated in 2013) and 25 th largest by area in United States (149,998 km 2 at the density of 89 per km 2). Springfield is the capital city and 6 th largest city of Illinois State. Chicago is the largest city of Illinois and 3 rd largest in United States with the population of 2,718,782 at the density of 4,610 inhabitants per km 2 on the total area of 587 km 2. Cicero city has highest density of 5,536 inhabitants per km 2 on the area of 15 km 2. The below 25 largest cities and towns of above 50,000 inhabitants, and ranked on population with details of Area and density.