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It was originally defined as the rate of heat transfer that results in the freezing or melting of 1 short ton (2,000 lb; 907 kg) of pure ice at 0 °C (32 °F) in 24 hours. [1] [2] The modern definition is exactly 12,000 Btu IT /h (3.516853 kW). Air-conditioning and refrigeration equipment capacity in the U.S. is often specified in "tons" (of ...
The Mitsubishi model was the first air conditioner with a cross-flow fan. [64] [65] [66] In 1969, the first mini-split air conditioner was sold in the US. [67] Multi-zone ductless systems were invented by Daikin in 1973, and variable refrigerant flow systems (which can be thought of as larger multi-split systems) were also invented by Daikin in ...
Graphic representation of the Great Vowel Shift showing how the pronunciation of the long vowels gradually shifted with the high vowels i: and u: breaking into diphthongs and the lower vowels each shifting their pronunciation up one level. The next period in the history of English was Early Modern English (1500–1700).
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Heavy snow in the extreme northern counties is considered 5 inches (13 cm) or more of snow in a 12-hour period or 7 inches (18 cm) or more of snow in a 24-hour period". Watches for heavy snow are issued when a 50 percent or greater chance of 2 inches (5.1 cm) or more of snow falling in a 12-hour period, or 4 inches (10 cm) or more in a 24-hour ...
Atlanta's housing market has also struggled, with home prices dropping by 2.1% in January 2012, reaching levels not seen since 1996. Compared with a year earlier, the average home price in Atlanta plummeted to 17.3% in February 2012, thus becoming the largest annual drop in the history of the index for any American or global city.
Christianity is an Abrahamic monotheistic religion, professing that Jesus was raised from the dead and is the Son of God, [7] [8] [9] [note 2] whose coming as the Messiah was prophesied in the Hebrew Bible (called the Old Testament in Christianity) and chronicled in the New Testament.
Gwinnett County, Georgia – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race. Race / Ethnicity (NH = Non-Hispanic) Pop 2000 [28] Pop 2010 [24] Pop 2020 [25] % 2000 % ...