Plutonium-239 decays into uranium-235 plus an alpha particle.The energy released in the process is 5.24 MeV.Given the following mass values 
He: 4.002603 u 
U: 235.043924 u what is the mass of 
Pu in atomic mass units? (1 u = 931.494 MeV/c2)
Definitions:
Riot
A violent disturbance by a crowd, often a symptom of social unrest or protest against authority or government policies.
Nannie Helen Burroughs
An African American educator, orator, religious leader, and businesswoman, known for her activism for women's rights and the education of black children, founding the National Training School for Women and Girls in Washington, D.C., in 1909.
War Department
Former name for what is now the Department of Defense in the United States, responsible for military affairs until it was restructured in 1947.
Lynching
A form of violence in which a mob, without legal authority, kills someone, often by hanging, for an alleged offense with or without a legal trial.
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