Question

Who invented Vacuum Flask?
A) Charles Babbage B) Alexander Fleming C) Gregory Pincus D) James Dewar

Answer 1

Answer:

James Dewar invented the flask in the course of his cryogenic research; he had been interested in liquid gases for over ten years, first demonstrating the research of others (performing the first public demonstration in Britain of the liquefaction of oxygen) and then beginning his own investigations....

Explanation:

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Answer 2

James Dewar invented the flask in the course of his cryogenic research; he had been interested in liquid gases for over ten years, first demonstrating the research of others (performing the first public demonstration in Britain of the liquefaction of oxygen) and then beginning his own investigations.

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