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? Leslie R. Groves James B. Conant Robert Oppenheimer Vannevar Bush Leslie R. Groves James B. Conant Robert Oppenheimer Vannevar Bush 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 Oboe Harmonium Banjo Clarinet Oboe Harmonium Banjo ANSWER DOWNLOAD EXAMIANS APP
Inventions What African-American inventor received 5 patents in the field of shoemaking? Lewis Latimer Elijah McCoy Ernest Just Jan Ernst Matzeliger Lewis Latimer Elijah McCoy Ernest Just Jan Ernst Matzeliger ANSWER DOWNLOAD EXAMIANS APP
Inventions When was the toothbrush invented? 1765 1790 1742 1770 1765 1790 1742 1770 ANSWER DOWNLOAD EXAMIANS APP
Inventions Until Victorian times, chocolate was thought of as a drink. When did the first chocolate bar appear? There is no sure date 1828 1831 1825 There is no sure date 1828 1831 1825 ANSWER DOWNLOAD EXAMIANS APP
Inventions What Thomas Davenport invented? Screw propellor Electric streetcar Chesterfield Sleeping (railway) car Screw propellor Electric streetcar Chesterfield Sleeping (railway) car ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS