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Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century.
The cotton gin (APEX)
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Earn +20 ptsQ: Was not an important invention created at the turn of the 20th century?
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What event in the 20th century not 21st has had the biggest impact on the world in which you live in today?
The end of British rule in the Indian sub continent and the emergence of India and Pakistan as independent states was the most important event in this part of the region in the 20th century.
What is similarity between the 20th century and 21st century?
The similarities between the 20th and 21st centuries lie in innovations. The 20th and 21st centuries have been periods of great strides in technology and other areas.
How many state constitutions were written in the 20th century?
17
Events did NOT happen in the 20th century?
: The first Kodak camera
What century were the amendments 16-27 passed in?
Amendments 16-27 were all passed during this century: 20th.
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