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What measurement device did Leonardo da Vinci sketch to record wind speed using a hinged plate?
Answer
Anemometer
What mechanical component did Leonardo da Vinci study using balls to reduce friction between moving surfaces?
Answer
Ball bearing
What human-shaped machine did Leonardo da Vinci design with articulated arms and legs?
Answer
Robot knight
What did Leonardo da Vinci call his rotating air-screw concept for vertical flight?
Answer
Aerial screw
What lifting machine did Leonardo da Vinci design with a helical screw for raising heavy loads?
Answer
Screw jack
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Latest trivia questions
Which amendment, ratified in 1920, prohibited denying the vote in the United States based on sex?
Answer
Nineteenth Amendment
Who wrote the words to “The Star-Spangled Banner” after seeing the 1814 attack on Fort McHenry?
Answer
Francis Scott Key
Who did the Second Continental Congress elect as commander-in-chief of the Continental Army?
Answer
George Washington