Astronomy mathematics medicine and physics
Aristarchus’ only extant treatise is “On the Sizes and Distances of the Sun and Moon.” In it he calculated the diameter of the Sun as about seven times the diameter of the Earth, thus estimating the Sun’s volume as about 300 times the volume of the Earth
This is because after winning independent slave trade also was in that event, or because Europeans wanted to influence Christians into Africa.
After the fall of the Roman Empire, Charlemagne became king of the Frankish people in the year 751. He had the main belief of unifying all Germanic peoples and convert them to Christianity. Other important beliefs he had were the revival of culture and education which had been relegated during the dark ages. Thanks to these beliefs, Charlemagne got to control a large part of Europe. They are important for a ruler since promoting education within it citizens helps the development of a society. The firm belief he had in uniting all peoples is represented in many rulers that followed him like Napoleon; it is an important principle to consolidate a government and peace in a territory. Another example that he set for future leaders is the ability to make strategic alliances, the one he made with the Catholic Church eventually turn him into the holy roman emperor.
Answer:
Reaction of carbonyl compounds with hydrogen cyanide, silver cyanide or potassium cyanide with hydrogen chloride
