They all went through hardships for example trade and war.
Answer: risk reinvention reflects particular common
Explanation:
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.
Answer:
By the end of the 2nd century CE, the Han empire had declined after a period of chaos, from which three centres of political power emerged (Three Kingdoms). In 220 CE Xiandi, the last Han emperor, ceded the throne to Cao Pi, who thereby became the heir of the empire and the first ruler of the Wei dynasty in one region.
Explanation:
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