Answer: It is considered by some that the screw thread was invented in about 400BC by Archytas of Tarentum (428 BC - 350 BC). Archytas is sometimes called the founder of mechanics and was a contemporary of Plato.
Explanation:
Over and over again he rehearsed it in wearisome <em><u>repetition</u></em><em><u> </u></em>until it had assumed a certain and almost invariable form.
Hence the answer is :
<h3>(c) Repetition </h3>
Answer:
D.
Explanation:
The Age of Imperialism was an age when Western powers colonized and divided Africa and large areas of Asia. The reasons for imperialism include economic competition between European countries or powers. Social Darwinism and racial superiority was another reason for imperialism. This is a phenomenon where the fittest one is considered superior or the fittest one enjoys survival. Another cause was white man's burden, which is an idea where white colonizers believed that they had a burden to colonize blacks.
The idea which is not considered a cause of imperialism was the technological superiority of non-Europeans. Therefore, option D is correct.
