Who among the following invented the tape recorder?
Samuel Colt
Karl Benz
Valdemar Paulsen
John Logie Baird
Who invented sewing machine?
Enrico Fermi
J. Walter Hunt
Which scientist discovered radium?
William Gilbert
Pierre and Marie Curie
Claudius Ptolemy
Benjamin Franklin
Which one of the following is discovered by Claudius Ptolemy?
Radium
Wave nature of light
Moons of Jupiter
Earth centred universe
What did Johannes Kepler discover?
Motor cycle
Telephone
Laws of planetary motion
What did Thomas Alva invent?
Phonograph
Revolver
Nuclear reactor
Motion pictures
What did Andres Celsius discover?
How objects fall
Centigrade temperature scale
Sun centred solar system
How things float
Inventor of motorcycle.
James Watt
Roger Bacon
Walter Hunt
Gottlib Daimler
Inventor of aeroplane.
Robert Hooke
Willis Carrier
Wright Brothers
Which one of the following is discovered by Gabriel Fahrenheit?
Fahrenheit temperature scale
The nature of lighting
Tape recorder
Hovercraft
