Examlex
A(n)____________________ is a device that uses hydrogen gas as a fuel to produce electricity.
Mid-Nineteenth-Century
A period in the 1800s characterized by significant social, economic, and political changes worldwide, roughly encompassing the years from 1830 to 1870.
Paper Money
Currency in the form of printed paper notes issued by a government or central bank as legal tender for transactions.
Early Nineteenth Century
The period from 1801 to 1830, a time marked by significant political, social, and technological changes globally, influencing the course of modern history.
Gold Or Silver
Metals that have historically served as a basis for currency and are valued for their rarity and intrinsic worth.
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