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 Who invented Automobiles using gasoline? Leo H Baekeland Karl Benz Evangelista Torricelli Kirkpatrick Macmillan Leo H Baekeland Karl Benz Evangelista Torricelli Kirkpatrick Macmillan ANSWER DOWNLOAD EXAMIANS APP
Inventions Which of the following was first patented by an Australian in 1889? Electric Drill Electric Heater Electric Fence Electric Shaver Electric Drill Electric Heater Electric Fence Electric Shaver ANSWER DOWNLOAD EXAMIANS APP
Inventions What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes? Hiram Walker Joshua Rumble Charles Richter Giuseppe Mercalli Hiram Walker Joshua Rumble Charles Richter Giuseppe Mercalli ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Jet Engine? Lewis E. Waterman Sir Frank Whittle Roger Bacon Gottlieb Daimler Lewis E. Waterman Sir Frank Whittle Roger Bacon Gottlieb Daimler ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented the Seed Drill? Thomas Hines Arlo Guthrie Jethro Tull Woodie Guthrie Thomas Hines Arlo Guthrie Jethro Tull Woodie Guthrie ANSWER DOWNLOAD EXAMIANS APP
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