1
Q:

Ralph Samuelson was only 18 when he invented this sporting item in 1922. What was that?

A) Golf tee B) Motorboat
C) Water skis D) Hang glider

Answer:   C) Water skis



Explanation:
Subject: Inventions
Q:

Which famous scientist unknowingly founded the field of spectroscopy?

A) Issac Newton B) Galileo
C) Graham Bell D) None of the above
 
Answer & Explanation Answer: A) Issac Newton

Explanation:
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0 88
Q:

The cotton gin was an important invention because

Answer

Cotton Gin was invented by Eli Whitney in 1793, which is used to separate cotton seeds from cotton fiber.


 


Hence, it was an important invention because it dramatically reduced the amount of time it took to separate cotton seeds from cotton fiber.

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0 186
Q:

What two scientists established the structure of dna?

A) Rosalind Franklin and Maurice Wilkins B) James Watson and Francis Crick
C) Rosalind Franklin and Francis Crick D) James Watson and Maurice Wilkins
 
Answer & Explanation Answer: B) James Watson and Francis Crick

Explanation:

In the early 1950s two scientists, Rosalind Franklin and Maurice Wilkins, studied DNA using x-rays. Franklin produced an x-ray photograph that allowed two other researchers, James Watson and Francis Crick to work out the 3D structure of DNA. The structure of DNA was found to be a double helix.

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0 247
Q:

Who Discovered The Nucleus of a Cell?

A) Otto Hahn B) John Dalton
C) Robert Brown D) Marie Curie
 
Answer & Explanation Answer: C) Robert Brown

Explanation:

Robert Brown, Scottish botanist, Discovered The Nucleus of a Cell in 1831, London. When Brown was studying orchids under microscope when he observed an opaque area, which he called the "Areola" or "Nucleus", in the cells of the flower's outer layer.

The nucleus was also described by Franz Bauer in 1804 but in detail Robert Brown made it in 1831.

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11 638
Q:

Who invented Bifocal Lens?

A) John Adams B) Benjamin Franklin
C) James Madison D) Thomas Jefferson
 
Answer & Explanation Answer: B) Benjamin Franklin

Explanation:

Benjamin Franklin has long been credited with the invention of bifocal lenses and he was the first to wear bifocal lenses. He did not produce them himself but instead had some optician in London or France make them for him to overcome Presbyopia, a condition that Franklin suffered. He was tired switching between lenses for far and near sightedness. And that resulted in inventing Bifocal Lenses.

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5 709
Q:

Who invented Electric Generator?

A) Michael Faraday B) Thomas Alva Edison
C) Graham Bell D) Alfred Nobel
 
Answer & Explanation Answer: A) Michael Faraday

Explanation:

Michael Faraday invented Electric Generator in 1831.

 

        • The operating principle of electromagnetic generators was discovered in the years of 1831–1832 by Michael Faraday.

 

        • The principle later called Faraday's law, is that an electromotive force is generated in an electrical conductor which encircles a varying magnetic flux.


 

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11 834
Q:

When was Barb Wire patented

A) 1898 B) 1868
C) 1874 D) 1866
 
Answer & Explanation Answer: C) 1874

Explanation:

Joseph F. Glidden - Father of Barbed Wire.

      • Glidden was born in New York in 1812. He invented Barbed Wire in 1873 and was granted the patent on Nov. 24, 1874. After a three year battle over the patent, which he eventually won received a patent for the modern invention in 1874 after he made his own modifications to previous versions.
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9 594
Q:

Who invented Dynamite?

A) Graham Bell B) Nikola Tesla
C) Alfred Nobel D) Louis Pateur
 
Answer & Explanation Answer: C) Alfred Nobel

Explanation:

Alfred Bernhard Nobel was a Swedish chemist, engineer, inventor, businessman, and philanthropist. Known for inventing Dynamite, Nobel also owned Bofors, which he had redirected from its previous role as primarily an iron and steel producer to a major manufacturer of cannon and other armaments.

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