Inventions Who invented the battery? James Hargreaves Alessandro Volta John Wilkinson Thomas Edison James Hargreaves Alessandro Volta John Wilkinson Thomas Edison ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1890s 1900s 1800s 1880s 1890s 1900s 1800s 1880s ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Automobiles using gasoline? Karl Benz Kirkpatrick Macmillan Evangelista Torricelli Leo H Baekeland Karl Benz Kirkpatrick Macmillan Evangelista Torricelli Leo H Baekeland 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? Clarinet Banjo Oboe Harmonium Clarinet Banjo Oboe Harmonium 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? Vannevar Bush Robert Oppenheimer Leslie R. Groves James B. Conant Vannevar Bush Robert Oppenheimer Leslie R. Groves James B. Conant ANSWER DOWNLOAD EXAMIANS APP
Inventions When was Milk Tray first introduced? 1923 1915 1934 1942 1923 1915 1934 1942 ANSWER DOWNLOAD EXAMIANS APP
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