In the pion, an up and an anti-down quark yield a particle of only 139.6 MeV of mass energy, while in the rho vector meson the same combination of quarks has a mass of 770 MeV! The masses of C and S are from Serway, and the T and B masses are from descriptions of the experiments in which they were discovered.
Independence Day 2018 is a federal holiday and falls on the fourth of July. The day of the week that the holiday falls on, changes each year. If July 4 is a Saturday, it is observed on Friday, July 3.
Military Holidays. The History of the 4th of July. On July 4, 1776, the thirteen colonies claimed their independence from England, an event which eventually led to the formation of the United States. Each year on July 4th, also known as Independence Day, Americans celebrate this historic event.