Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1890s 1900s 1880s 1800s 1890s 1900s 1880s 1800s ANSWER DOWNLOAD EXAMIANS APP
Inventions Which insurance salesman invented the fountain pen in 1884? Charles Kettering Sir William Grove Lewis Edson Waterman George Fountain Charles Kettering Sir William Grove Lewis Edson Waterman George Fountain ANSWER DOWNLOAD EXAMIANS APP
Inventions Who came up with the idea for INSTANT MASHED POTATO? K. Edwards E. Asselbergs W. Raleigh S. Tuberosum K. Edwards E. Asselbergs W. Raleigh S. Tuberosum ANSWER DOWNLOAD EXAMIANS APP
Inventions What invention caused many deaths while testing it? Ladders Parachute Dynamite Race cars Ladders Parachute Dynamite Race cars ANSWER DOWNLOAD EXAMIANS APP
Inventions What 'game' was first produced by the Southern Novelty Company in Baltimore, Maryland in 1892? Ouija board Monopoly Ping Pong Frisbee Ouija board Monopoly Ping Pong Frisbee ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Jet Engine? Gottlieb Daimler Sir Frank Whittle Lewis E. Waterman Roger Bacon Gottlieb Daimler Sir Frank Whittle Lewis E. Waterman Roger Bacon ANSWER DOWNLOAD EXAMIANS APP
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