Answer:
British mathematician William Bourne made some of the earliest known plans for a submarine around 1578, but the world’s first working prototype was built in the 17th century by Cornelius Drebbel, a Dutch polymath and inventor in the employ of the British King James I. Drebbel’s sub was probably a modified rowboat coated in greased leather and manned by a team of oarsmen. Sometime around 1620, he used it to dive 15 feet beneath the River Thames during a demonstration witnessed by King James and thousands of astonished Londoners. Unfortunately, none of Drebbel’s plans or engineering drawings has survived to today, so historians can only guess about how his “diving boat” actually operated. Some accounts say it submerged via a collection of bladders or wooden ballast tanks, while others suggest that a sloping bow and a system of weights were used to propel the boat underwater when it was rowed at full speed.
Explanation:
Answer and Explanation: Mansa Musa's pilgrimage to Mecca introduced the wealth and power of Mali to the rest of the Mediterranean. ... The king had carried 30,000 pounds of gold, which signified the immense wealth in his empire. This created an impression on his acquaintances. Hope this helps... :D
Answer:
Through the silk road.
the Mediterranean Sea
, trans-Saharan and
the Indian Ocean,
This is trade endurance
Explanation:
The Silk Road consisted of a succession of trails followed by caravans through Central Asia, about 6,400 km in length. Merchants with their caravans were shipping goods back and forth from one trade center to the other.
In addition to silk, major commodities traded included gold, jade, tea, and spices.
The Silk Road was important because it helped to generate trade and commerce between a number of different kingdoms and empires.
