What did John Dunlop invent?
Phonograph
Revolver
Pneumatic tyre
Nuclear reactor
Which one of the following was invented by Enrico Fermi?
Aeroplane
Computer
Gramaphone
Who discovered X-rays?
Wilhem Roentgen
Thomas Young
Benjamin Franklin
John Dalton
Who invented the wave nature of light?
Anders Celsius
Archimedes
Galileo Galilei
Which scientist discovered radium?
William Gilbert
Pierre and Marie Curie
Claudius Ptolemy
Inventor of motorcycle.
James Watt
Roger Bacon
Walter Hunt
Gottlib Daimler
Inventor of aeroplane.
Robert Hooke
Willis Carrier
Wright Brothers
Who among the following invented the tape recorder?
Samuel Colt
Karl Benz
Valdemar Paulsen
John Logie Baird
What did Thomas Alva invent?
Motion pictures
Who invented revolver?
