Who discovered the exact relationship between mechanical work done and heat generated, leading to the SI unit of energy? MCQ with Answer and Explanation
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Question #1
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Who discovered the law of conservation of mass in chemical reactions?
Correct Answer: Option C
Explanation:
Antoine Lavoisier formulated the Law of Conservation of Mass in 1789, proving that mass is neither created nor destroyed in chemical transformations.
Antoine Lavoisier formulated the Law of Conservation of Mass in 1789, proving that mass is neither created nor destroyed in chemical transformations.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who discovered the specific mathematical constant linking the energy of a photon to its frequency?
Correct Answer: Option C
Explanation:
Max Planck discovered Planck's constant ($h$) as part of his derivation of blackbody radiation energy laws.
Max Planck discovered Planck's constant ($h$) as part of his derivation of blackbody radiation energy laws.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The invention of the common mechanical elevator safety brake system was publicly demonstrated at the World's Fair by whom?
Correct Answer: Option D
Explanation:
Otis dramatic demonstration in 1854 involved cutting the platform support rope while standing on it, proving the safety gear worked.
Otis dramatic demonstration in 1854 involved cutting the platform support rope while standing on it, proving the safety gear worked.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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