This statesman, politican, scholar, inventor, and one of early presidents of USA invented the swivel chair, the spherical sundial, the moldboard plow, and the cipher wheel.
George Washington
Alexander Hamilton
John Adams
Thomas Jefferson
Theory of evolution was presented by ?
Who invented Braille script?
Who invented Radio?
Marconi
Torricelli
Gutenberg
none of these
Who invented Bicycle ?
Which scientist discovered the radioactive element radium?
Isaac Newton
Albert Einstein
Benjamin Franklin
Marie Curie
What James Watt invented?
Diving bell
Steam boat
Hot air balloon
Rotary steam engine
Who invented Fountain pen?
Waterman
Graham bell
Gillette
What J. B. Dunlop invented?
Pneumatic rubber tire
Automobile wheel rim
Rubber boot
Model airplanes
What Galileo invented?
Barometer
Pendulum clock
Microscope
Thermometer
