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Q:

This statesman,politican,scholar,inventor,and one of early presidents of USA invented the swivel chair,the spherical sundial,the moldboard plow,and the cipher wheel.

A) George Washington B) Alexander Hamilton
C) John Adams D) Thomas Jefferson

Answer:   D) Thomas Jefferson



Explanation:

 Thomas Jefferson (April 13, 1743 – July 4, 1826) was the third President of the United States (1801-1809) and the principal author of the Declaration of Independence (1776).

Subject: Inventions
Q:

Who discovered benzene?

A) Hal Anger B) Michael Faraday
C) Bruce Ames D) Nicolas Appert
 
Answer & Explanation Answer: B) Michael Faraday

Explanation:
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Q:

Who invented logarithms?

A) Eden Snowden B) Larry Page
C) Thomas Edison D) John Napier
 
Answer & Explanation Answer: D) John Napier

Explanation:
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Q:

Who invented the vacuum pump?

A) Otto von Guericke B) Cai Lun
C) Melitta Bentz D) William Henry Fox Talbot
 
Answer & Explanation Answer: A) Otto von Guericke

Explanation:
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Q:

Who invented bluetooth?

A) Kirkpatrick Macmillan B) Benjamin Franklin
C) Dr. Jaap Haartsen D) Charles Babbage
 
Answer & Explanation Answer: C) Dr. Jaap Haartsen

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Q:

Who discovered the colour photography?

A) Robert Noyce B) Enrico Fermi
C) John Logie Baird D) James Clerk Maxwell
 
Answer & Explanation Answer: D) James Clerk Maxwell

Explanation:
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Q:

Who invented the electrocardiogram (ECG)?

A) Willem Einthoven B) Edward Jenner
C) Antonio de Ulloa and Charles Wood D) Karl Benz
 
Answer & Explanation Answer: A) Willem Einthoven

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Q:

Who discovered Sodium?

A) Humphry Davy B) William Henry Fox
C) J.J.Thomson D) Karl Benz
 
Answer & Explanation Answer: A) Humphry Davy

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Q:

Who invented the waterproof raincoat?

A) Robert Hooke B) Cai Lun
C) Charles Macintosh D) William Harvey
 
Answer & Explanation Answer: C) Charles Macintosh

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