Important Inventions and Discoveries in World » Exercise – 1
1. Who invented the BALLPOINT PEN?
(a) Biro Brothers
(b) Waterman Brothers
(c) Bicc Brothers
(d) Write Brothers
2. What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes?
(a) Charles Richter
(b) Hiram Walker
(c) Giuseppe Mercalli
(d) Joshua Rumble
3. When was barb wire patented?
(a) 1874
(b) 1840
(c) 1895
(d) 1900
4. In which decade was the first solid state integrated circuit demonstrated?
(a) 1950s
(b) 1960s
(c) 1970s
(d) 1980s
5. Which scientist discovered the radioactive element radium?
(a) Isaac Newton
(b) Albert Einstein
(c) Benjamin Franklin
(d) Marie Curie
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- Important Inventions and Discoveries in World » Exercise - 1 1. Who invented the BALLPOINT PEN? (a) Biro Brothers (b) Waterman Brothers (c) Bicc Brothers (d) Write Brothers
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