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 Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent? Banjo Clarinet Oboe Harmonium Banjo Clarinet Oboe Harmonium ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Bicycle? Leo H Baekeland Evangelista Torricelli Kirkpatrick Macmillan Karl Benz Leo H Baekeland Evangelista Torricelli Kirkpatrick Macmillan Karl Benz ANSWER DOWNLOAD EXAMIANS APP
Inventions What Enrico Fermi invented? Nuclear reactor X ray machine Betatron Cyclotron Nuclear reactor X ray machine Betatron Cyclotron ANSWER DOWNLOAD EXAMIANS APP
Inventions What invention was first installed at a Hartford, Connecticut bank in 1889? Pay telephone Burglar alarm Automatic teller machine Time-lock safe Pay telephone Burglar alarm Automatic teller machine Time-lock safe ANSWER DOWNLOAD EXAMIANS APP
Inventions What Frank Whittle invented? Jet propulsion Ethyl gasoline Sonar Radar Jet propulsion Ethyl gasoline Sonar Radar ANSWER DOWNLOAD EXAMIANS APP
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