The invention was the alternating current made by Nikola Tesla.
The answer is The golden age
The summarize version of Nathaniel Hawthorne’s short story “Dr Heidegger’s experiment” is given below.
Dr. Heidegger summons four of his aging acquaintances to see him in his office at the start of the story. The Nathaniel Hawthorne short tale Doctor Heidegger's Experiment, also known by the spelling Dr. Heidegger's Experiment, was first published in Twice-Told Tales (1837).
<h3>What is the summary of the experiment?</h3>
Elderly Dr. Heidegger conducts his aging research experiment with four of his contemporaries. A withered rose is given a drink from the Fountain of Youth by Dr. Heidegger, and the flower regains its beauty and freshness.
Each of the three male participants progressively returns to youth after consuming some of the mythical water, and all three pursue the only girl present, whose youthful beauty has also been revived. Accidentally spilling the water from the vial causes the rose to wilt, and the experimenters progressively revert to their earlier age.
Humans are prone to unthinkingly repeating their past errors, according to Dr. Heidegger's experiment. He cautions his test subjects not to behave in the same manner as when they were children. But as soon as they have their second drink, they act just as they did when they were younger.
Therefore, The foundation of "Dr. Heidegger's Experiment" is a somewhat dismal understanding of human nature. The narrative makes the claim that most people are not right in the head. We can't expect anyone to improve because they don't learn from their mistakes and are typically petty.
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What best describes the impact of ww1 on the economy is that it was draining, it was a type of depression that just sucked the resources out of the American economy. Hope this helps.
PLZ GIVE BRAINLIEST.
