Answer: Photoelectric effect and emission spectrum of the hydrogen atom.
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That would be Czechoslovakia.
Henry David Thoreau wrote Civil Disobedience
the answer is the Ural mountains, separating Europe and Asia
During their transformation, Europe experienced all of the following except the decline of the middle class.
Answer: Option C
<u>Explanation:
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It was in fact during the period of transformation that the middle class grew dramatically in Europe. New opportunities of employment enabled the levitation of the lower class to the middle class.
Transformation brought prosperity, increased economic stability, and an enhanced standard of living. Agriculture was no more the only medium to fetch economic gains through. Thus, the middle class grew rapidly.