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 unemployment rate in Springfield (zip 97478) is 5.90 percent(U.S. avg. is 5.20%). Recent job growth is Positive. Springfield (zip 97478) jobs have Increased by 2.25 percent. Compared to the rest of the country, Springfield (zip 97478)'s cost of living is 4.40% Higher than the U.S. average. As of 2014, Springfield (zip 97478)'s population is 38,205 people. Since 2000, it has had a population growth of 38.73 percent.