Inventions When were bar code scanners invented? 1970s 1940s 1950s 1960s 1970s 1940s 1950s 1960s ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Gunpowder? Sir Frank Whittle Leo H Baekeland G. Ferdinand Von Zeppelin Roger Bacon Sir Frank Whittle Leo H Baekeland G. Ferdinand Von Zeppelin Roger Bacon ANSWER DOWNLOAD EXAMIANS APP
Inventions The Manhattan Project was started by President Roosevelt in 1942 to ensure that the U.S. beat the Germans in developing a nuclear bomb. Whom did Roosevelt appoint as scientific head the Manhattan Project? Leslie R. Groves Robert Oppenheimer James B. Conant Vannevar Bush Leslie R. Groves Robert Oppenheimer James B. Conant Vannevar Bush ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Dynamite? Thomas Alva Edison Benjamin Franklin Alfred B. Nobel Sir Alexander Graham Bell Thomas Alva Edison Benjamin Franklin Alfred B. Nobel Sir Alexander Graham Bell ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented the phonograph? John Kruesi Jules Levy Alexander Graham Bell Thomas Edison John Kruesi Jules Levy Alexander Graham Bell Thomas Edison ANSWER DOWNLOAD EXAMIANS APP
Inventions What Enrico Fermi invented? X ray machine Betatron Nuclear reactor Cyclotron X ray machine Betatron Nuclear reactor Cyclotron ANSWER DOWNLOAD EXAMIANS APP
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