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 state capital is Springfield. The population of Sumner is approximately 1,823 (2004), 3174 (2010). The approximate number of families is 418 (1990), 331 (2010). The amount of land area in Sumner is 2.669 sq. kilometers. The amount of land area in Sumner is 1.0 sq. miles. The amount of surface water is 0 sq kilometers. The distance from Sumner to Washington DC is 615 miles. The distance to the Illinois state capital is 124 miles.