Who discovered the electron?
A. Ernest Rutherford
B. James Chadwick
C. J. J. Thomson
D. Niels Bohr
Who discovered X-rays?
A. Michael Faraday
B. Wilhelm Conrad Röntgen
C. Ernest Rutherford
D. Niels Bohr
Who invented the first practical typewriter that became commercially successful?
A. Charles Babbage
B. Samuel Morse
C. Christopher Latham Sholes
D. Johannes Gutenberg
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Who invented the power loom?
A. James Hargreaves
B. Richard Arkwright
C. Edmund Cartwright
D. Eli Whitney
Who invented the spinning jenny?
A. Richard Arkwright
B. James Hargreaves
C. Eli Whitney
D. Edmund Cartwright
Who invented the cotton gin?
A. James Hargreaves
B. Eli Whitney
C. Richard Arkwright
D. Edmund Cartwright
Who invented the first successful mechanical sewing machine?
A. Elias Howe
B. Barthélemy Thimonnier
C. Isaac Singer
D. James Hargreaves
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Who invented the ballpoint pen commonly associated with the modern design?
A. Lewis Waterman
B. László Bíró
C. Johannes Gutenberg
D. Samuel Morse
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Who is credited with inventing modern air conditioning?
A. James Watt
B. Nikola Tesla
C. Willis Carrier
D. Rudolf Diesel
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Who invented the first practical mechanical refrigerator using vapour compression?
A. Willis Carrier
B. James Harrison
C. Thomas Edison
D. Michael Faraday
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