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Mixtures in two or more phases are heterogeneous mixtures. Examples include ice cubes in a drink, sand and water, and salt and oil. The liquid that is immiscible form heterogeneous mixtures. A good example is a mixture of oil and water.
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It drove down the cost of producing clothing.
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Explanation:
Alexander used religion in two ways to inspire loyalty among his followers and the people he conquered. First, he honored the Egyptian and Persian gods. He treated them as equal to Greek gods. ... When he arrived, a priest welcomed him as “God's son.” The priest's words helped Alexander gain the loyalty of the Egyptians.
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While alive, Mohammed created a political empire. After his death, the community was left without a leader. Since Mohammed hadn't named the next leader before his death, panic spread across the empire. Some clans abandoned Islam altogether, other refused to pay taxes, and some even declared themselves prophets. The next four people to lead the empire all knew Mohammed and became known as the "rightly guided" caliphs. Each one of the caliphs played a part in expanding the Muslim empire to 4X its size. The Muslims succeeded because they were energized by their faith, and let Christians and Jewish people keep theirs. Over time many cultures in the Muslim empire converted to Islam because of Islam's message of equality.
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A letter written during the time a historical event occurred is a useful primary source document.
Primary source documents are the most original way to understand Historical events.
If it was the letter written for discussing analysing the same historical event after the occurrence of the event, it would have been considered as a secondary source.
