A. S. Sperrow B. O. Stricheg C. T. Henman D. C. Cockerell Explanation: Christopher Cockerell invented the hovercraft in 1956.…
A. Elijah McCoy B. Jan Ernst Matzeliger C. Ernest Just D. Lewis Latimer Explanation: Matzeliger never benefited financially from his…
A. S. Tuberosum B. W. Raleigh C. E. Asselbergs D. K. Edwards Explanation: Instant mash was invented by Edward A…
A. Albert Einstein B. Michael Skube C. George Gamow D. Roger Penrose Explanation: George Gamow. Gamow, who died in 1968,…
A. Lewis Edson Waterman B. Sir William Grove C. Charles Kettering D. George Fountain Explanation: Lewis Edson Waterman patented the…
A. Robert Koch B. Edward Jenner C. Robert Hooke D. Louis Pasteur
A. 1874 B. 1840 C. 1895 D. 1900 Explanation: Joseph F. Glidden was born in New York on Jan. 18,…
A. Isaac Newton B. Albert Einstein C. Benjamin Franklin D. Marie Curie
A. 1950s B. 1960s C. 1970s D. 1980s Explanation: On September 12, 1958, Jack Kilby demonstrated the first working IC…
A. Biro Brothers B. Waterman Brothers C. Bicc Brothers D. Write Brothers Explanation: The Hungarian brothers, Laszlo and George Biro,…