Who discovered that the velocity of falling objects is completely independent of their weight in a vacuum? MCQ with Answer and Explanation

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Who discovered that the velocity of falling objects is completely independent of their weight in a vacuum?

A. Isaac Newton

B. Johannes Kepler

C. Aristotle

D. Galileo Galilei

Answer: Option D

Solution (By JKSSB Mock Tests)

Galileo mathematically disproved Aristotle's weight-proportional velocity model via rigorous acceleration measurements down inclined tracks.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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The invention of the common maritime navigation safety equipment known as the Fresnel Lens was optimized for what?

A. Lighthouses

B. Sailing sextants

C. Submarines

D. Telescopes

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Correct Answer: Option A

Explanation:
Augustin-Jean Fresnel engineered stepped composite rings that focused lighthouse lamp light into parallel beams visible across oceans.

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Question #2

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Who discovered the presence of the planet Jupiter's four largest satellite moons in 1610?

A. Tycho Brahe

B. Galileo Galilei

C. Nicolaus Copernicus

D. Johannes Kepler

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Correct Answer: Option B

Explanation:
Galileo observed Io, Europa, Ganymede, and Callisto using his primitive refracting glass telescope.

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Question #3

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The invention of the first functional high-vacuum electron tube amplifier, the Audion triode, was made by whom?

A. Lee de Forest

B. Thomas Edison

C. John Ambrose Fleming

D. Nikola Tesla

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Correct Answer: Option A

Explanation:
Lee de Forest added a grid control wire element to Fleming's diode in 1906, creating the first signal amplification tube.

This question belongs to: Static General Knowledge Inventions and Discoveries

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