Inventions What charge card, developed in 1950, was the first to be accepted nationally in the US? Diner's Club MasterCharge Visa Discover Diner's Club MasterCharge Visa Discover ANSWER DOWNLOAD EXAMIANS APP
Inventions What J. B. Dunlop invented? Pneumatic rubber tire Model airplanes Automobile wheel rim Rubber boot Pneumatic rubber tire Model airplanes Automobile wheel rim Rubber boot 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? Leslie R. Groves Robert Oppenheimer James B. Conant Vannevar Bush Leslie R. Groves Robert Oppenheimer James B. Conant Vannevar Bush ANSWER DOWNLOAD EXAMIANS APP
Inventions What Enrico Fermi invented? Betatron Nuclear reactor Cyclotron X ray machine Betatron Nuclear reactor Cyclotron X ray machine ANSWER DOWNLOAD EXAMIANS APP
Inventions FROZEN FOOD - Who discovered the first practical method of freezing food? C. Birdsey G. Findus R. Scott F. Rozenosh C. Birdsey G. Findus R. Scott F. Rozenosh ANSWER DOWNLOAD EXAMIANS APP
Inventions What invention caused many deaths while testing it? Parachute Ladders Dynamite Race cars Parachute Ladders Dynamite Race cars ANSWER DOWNLOAD EXAMIANS APP
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