What mechanical component did Leonardo da Vinci study using small metal spheres?
Answer
Ball bearing
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What mechanical component did Leonardo da Vinci study using small metal spheres?
Answer
Ball bearing
What type of device did Leonardo da Vinci sketch in 1485 as a way for a person to descend safely from a height?
Answer
Parachute
What Leonardo da Vinci machine used a pyramid-shaped helical blade to suggest powered flight?
Answer
Aerial screw
At what time did Mamoru Shigemitsu sign Japan’s surrender instrument on USS Missouri?
Answer
9:04 a.m.
Which Japanese military force’s defeat in Manchuria helped bring about Japan’s surrender in August 1945?
Answer
Kwantung Army
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What date was the Japanese surrender ceremony held in Nanjing, ending the war in China?
Answer
September 9, 1945
On what date was Japan's formal World War II surrender signed, creating the main V-J Day date?
Answer
September 2, 1945
What national emblem did Congress first approve in 1782 after beginning its design work in 1776?
Answer
Great Seal of the United States