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.
Springfield is the third largest city in the U.S. state of Missouri. It is the county seat of Greene County. According to the 2010 census data, the population was 159,498, an increase of 5.2% since the 2000 census. The Springfield Metropolitan Area, population 436,712, includes the counties of Christian, Dallas, Greene, Polk and Webster. Springfield's nickname is the Queen City of the Ozarks. It is also known as the Cultural Center of the Ozarks, the Gateway to the Ozarks, and the Birthplace of Route 66. Often known as the northern most southern city in the United States, Springfield was a big part of the confederacy.