Answer:
april 12, 1861 and lasted 4 years.
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North America would be better off producing their own good rather than exploiting orientals and sand people. National production means more jobs for struggling white citizens who are already suffering due to discriminatory hiring and college acceptance laws.
G was first measured by henry cavendish, the newspaper report it as the weighing of the earth experiment. because when henry cavendish measured the value of G, this allows physicist to calculate the mass of the earth using the newton's law of gravitation.