Inventions Who invented Gunpowder? Sir Frank Whittle Leo H Baekeland G. Ferdinand Von Zeppelin Roger Bacon Sir Frank Whittle Leo H Baekeland G. Ferdinand Von Zeppelin Roger Bacon ANSWER DOWNLOAD EXAMIANS APP
Inventions What J. B. Dunlop invented? Pneumatic rubber tire Automobile wheel rim Rubber boot Model airplanes Pneumatic rubber tire Automobile wheel rim Rubber boot Model airplanes ANSWER DOWNLOAD EXAMIANS APP
Inventions What toy was invented by Joshua Lionel Cowen around 1900? Electric train Raggedy Ann doll Yo-yo Tinkertoys Electric train Raggedy Ann doll Yo-yo Tinkertoys ANSWER DOWNLOAD EXAMIANS APP
Inventions For what does the world owe Almon Strowger a debt of gratitude? Parking Meters Vending Machines Automatic Telephone Exchanges Traffic Lights Parking Meters Vending Machines Automatic Telephone Exchanges Traffic Lights ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented the first controllable flying AEROPLANE (AIRPLANE)? West Brothers South Brothers Lidenbergh Brothers Wright Brothers West Brothers South Brothers Lidenbergh Brothers Wright Brothers ANSWER DOWNLOAD EXAMIANS APP
Inventions Which scientist discovered the radioactive element radium? Albert Einstein Marie Curie Benjamin Franklin Isaac Newton Albert Einstein Marie Curie Benjamin Franklin Isaac Newton ANSWER DOWNLOAD EXAMIANS APP
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