The first accurate measurement of the speed of light using astronomical observations of Jupiter's moons was performed by whom? MCQ with Answer and Explanation
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Question #1
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Who discovered that elements display unique crystalline patterns when rapidly frozen from molten metal matrices, founding physical Metallurgy?
Correct Answer: Option C
Explanation:
Sorby applied microscopic analysis to polished iron and steel samples, establishing microstructure phase boundaries.
Sorby applied microscopic analysis to polished iron and steel samples, establishing microstructure phase boundaries.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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The invention of the common mechanical office stapler mechanism was popularized by which manufacturing developer?
Correct Answer: Option A
Explanation:
McGill patented functional malleable brass paper fasteners, and industrial developers later automated magazine tracking feeds.
McGill patented functional malleable brass paper fasteners, and industrial developers later automated magazine tracking feeds.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The invention of the common mechanical device known as the industrial centrifugal cream separator was patented by whom?
Correct Answer: Option D
Explanation:
De Laval patented the high-speed continuous centrifugal cream separator in 1878, streamlining commercial dairy production.
De Laval patented the high-speed continuous centrifugal cream separator in 1878, streamlining commercial dairy production.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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