Answer:
Though the first actual helicopter wasn’t built until the 1940s, it is believed that Leonardo da Vinci’s sketches from the late fifteenth century were the predecessor to the modern day flying machine. As with many of da Vinci’s ideas, he never actually built and tested it – but his notes and drawings mapped out exactly how the device would operate.
Explanation:
Answer:
The Nobel Company
Explanation:
He bulit dynamite that was inteneded to be used in The Nobel Company.
Answer:
The <u><em>BABYLONIANS </em></u>were the first to write down and record their system of law.
Explanation:
Answer:the 19th amendment
Explanation:
Passed by Congress June 4, 1919, and ratified on August 18, 1920, the 19th amendment granted women the right to vote. The 19th amendment guarantees all American women the right to vote. Achieving this milestone required a lengthy and difficult struggle; victory took decades of agitation and protest.
The use of natural gas was limited during the 19th century because technology did not exist to extract large amounts of gas and pipe it safely over long distances.
