The United States's recession was for only seven months and eventually lead to the Great Depression in 1929. On the other hand, Germany was much harder due to their debts that are needed to be paid and that was because of the Treaty of Versailles that obliged the Germany to pay the Allied Powers its debt.
Eight hours is all I have to say
When you heat air it expands. When air expands it becomes less dense than the air around it, in turn making it rise.
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