Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1890s 1800s 1880s 1900s 1890s 1800s 1880s 1900s ANSWER DOWNLOAD EXAMIANS APP
Inventions What Elisha Otis invented? The brake used in modern elevators Turbine Hydraulic Crane Jet Engine The brake used in modern elevators Turbine Hydraulic Crane Jet Engine ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade was the first solid state integrated circuit demonstrated? 1960s 1980s 1950s 1970s 1960s 1980s 1950s 1970s ANSWER DOWNLOAD EXAMIANS APP
Inventions What invention was first installed at a Hartford, Connecticut bank in 1889? Pay telephone Time-lock safe Automatic teller machine Burglar alarm Pay telephone Time-lock safe Automatic teller machine Burglar alarm ANSWER DOWNLOAD EXAMIANS APP
Inventions What 'game' was first produced by the Southern Novelty Company in Baltimore, Maryland in 1892? Ping Pong Frisbee Monopoly Ouija board Ping Pong Frisbee Monopoly Ouija board ANSWER DOWNLOAD EXAMIANS APP
Inventions Which of the following was first patented by an Australian in 1889? Electric Drill Electric Shaver Electric Heater Electric Fence Electric Drill Electric Shaver Electric Heater Electric Fence ANSWER DOWNLOAD EXAMIANS APP
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