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.
Americans began observing the Fourth of July as early as 1777, when the first-ever major celebration in Philadelphia included a parade, a thirteen-shot cannon salute, and fireworks, but Congress didnât make it official until 1870, when it was part of a bill passed to recognize major state holidays at a federal levelâlike Independence Day, Christmas ...