What item, originally called the 'Whirlwind', was invented by Ives McGaffey in 1869?
A. Blender
B. Electric mixer
C. Washing machine
D. Vacuum cleaner
Answer: Option D
A. Blender
B. Electric mixer
C. Washing machine
D. Vacuum cleaner
Answer: Option D
Who invented the ballpoint pen?
A. Biro Brothers
B. Waterman Brothers
C. Bicc Brothers
D. Write Brothers
In which decade was the first solid state integrated circuit demonstrated?
A. 1950s
B. 1960s
C. 1970s
D. 1980s
A. Pneumatic rubber tire
B. Automobile wheel rim
C. Rubber boot
D. Model airplanes
Which scientist discovered the radioactive element radium?
A. Isaac Newton
B. Albert Einstein
C. Benjamin Franklin
D. Marie Curie
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