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In finance, the rule of 72, the rule of 70[1] and the rule of 69.3 are methods for estimating an investment 's doubling time. The rule number (e.g., 72) is divided by the interest percentage per period (usually years) to obtain the approximate number of periods required for doubling. Although scientific calculators and spreadsheet programs have ...
For example, with an annual growth rate of 4.8% the doubling time is 14.78 years, and a doubling time of 10 years corresponds to a growth rate between 7% and 7.5% (actually about 7.18%). When applied to the constant growth in consumption of a resource, the total amount consumed in one doubling period equals the total amount consumed in all ...
The doubling time is the amount of time it would take for a breeder reactor to produce enough new fissile material to replace the original fuel and additionally produce an equivalent amount of fuel for another nuclear reactor. This was considered an important measure of breeder performance in early years, when uranium was thought to be scarce.
World War II [b] or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all the world's countries—including all the great powers—participated, with many investing all available economic, industrial, and scientific capabilities in pursuit of total war, blurring the distinction between military and ...
The Peace of Westphalia (German: Westfälischer Friede, pronounced [vɛstˈfɛːlɪʃɐ ˈfʁiːdə] ⓘ) is the collective name for two peace treaties signed in October 1648 in the Westphalian cities of Osnabrück and Münster. They ended the Thirty Years' War (1618–1648) and brought peace to the Holy Roman Empire, closing a calamitous ...
The majority of registered voters say they accept President-elect Trump’s victory in the White House race, regardless of feelings, according to a recent exit poll. The YouGov/Economist survey ...
The scale of warfare dramatically enlarged during the Revolutionary and subsequent Napoleonic Wars. During Europe's major pre-revolutionary war, the Seven Years' War of 1756–1763, few armies ever numbered more than 200,000 with field forces often numbering less than 30,000. The French innovations of separate corps (allowing a single commander ...
The Thirty Years' War, [j] from 1618 to 1648, was one of the most destructive conflicts in European history. Fought primarily in Central Europe , an estimated 4.5 to 8 million soldiers and civilians died from the effects of battle, famine, or disease, while parts of Germany reported population declines of over 50%. [ 19 ]