Inventions What Benjamin Franklin invented? Radio Bifocal spectacles Barometer Hygrometer Radio Bifocal spectacles Barometer Hygrometer ANSWER DOWNLOAD EXAMIANS APP
Inventions For what does the world owe Almon Strowger a debt of gratitude? Vending Machines Parking Meters Traffic Lights Automatic Telephone Exchanges Vending Machines Parking Meters Traffic Lights Automatic Telephone Exchanges ANSWER DOWNLOAD EXAMIANS APP
Inventions What now-ubiquitous device was invented by Zenith engineer Eugene Polley in 1955? VCR Calculator Microwave oven Remote control VCR Calculator Microwave oven Remote control ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Gunpowder? Sir Frank Whittle Leo H Baekeland Roger Bacon G. Ferdinand Von Zeppelin Sir Frank Whittle Leo H Baekeland Roger Bacon G. Ferdinand Von Zeppelin ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1890s 1880s 1800s 1900s 1890s 1880s 1800s 1900s ANSWER DOWNLOAD EXAMIANS APP
Inventions When was the toothbrush invented? 1770 1765 1790 1742 1770 1765 1790 1742 ANSWER DOWNLOAD EXAMIANS APP
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