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? Robert Oppenheimer James B. Conant Vannevar Bush Leslie R. Groves Robert Oppenheimer James B. Conant Vannevar Bush Leslie R. Groves ANSWER DOWNLOAD EXAMIANS APP
Inventions What Benjamin Franklin invented? Barometer Bifocal spectacles Radio Hygrometer Barometer Bifocal spectacles Radio Hygrometer ANSWER DOWNLOAD EXAMIANS APP
Inventions What James Watt invented? Diving bell Hot air balloon Steam boat Rotary steam engine Diving bell Hot air balloon Steam boat Rotary steam engine ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade was the telegraph invented? 1890s 1870s 1840s 1810s 1890s 1870s 1840s 1810s ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1900s 1880s 1890s 1800s 1900s 1880s 1890s 1800s ANSWER DOWNLOAD EXAMIANS APP
Inventions What J. B. Dunlop invented? Model airplanes Automobile wheel rim Pneumatic rubber tire Rubber boot Model airplanes Automobile wheel rim Pneumatic rubber tire Rubber boot ANSWER DOWNLOAD EXAMIANS APP
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