51.

The first hand glider was designed by...?
A. Leonardo DaVinci B. The Wright brothers
C. Francis Rogallo D. Galileo
Answer and Explanation
Answer:A
Explanation: No answer description available for this question
52.

In which decade was the telegraph invented?
A. 1810s B. 1840s
C. 1870s D. 1890s
Answer and Explanation
Answer:B
Explanation: On May 24, 1844, Samuel Morse send his famous message, "What hath God wrought?"
53.

What inspired reflecting road lights to be invented?
A. Car door reflecting mirrors B. The light a cat's eyes gave off on a fence
C. Sun light on steel posts on road sides D. The sun light on the windshield
Answer and Explanation
Answer:B
Explanation: In 1933, Englishman Percy Shaw was driving home when he saw a cat's eyes reflecting. He had been headed straight towards a fence with the cat on it, but on the other side was a drop of hundreds of feet.
54.

When were blue jeans invented?
A. 1900s B. 1860s
C. 1870s D. 1850s
Answer and Explanation
Answer:D
Explanation: The first blue jeans were invented by tailor Levi Strauss, who invented tougher working pants for the miners of the California Gold Rush.
55.

Who invented Electric Generator?
A. Sir Alexander Graham Bell B. Michael Faraday
C. Alfred B. Nobel D. Thomas Alva Edison
Answer and Explanation
Answer:B
Explanation: No answer description available for this question.