Former Republican President Ronald Reagan is widely recognized as one of America's best presidents for economic expansion. But his party's overall economic track record isn't nearly as sterling. Michael Evans/The White House/Getty Images.
Superheated water is liquid water under pressure at temperatures between the usual boiling point, 100 Â°C (212 Â°F) and the critical temperature, 374 Â°C (705 Â°F). It is also known as subcritical water or pressurized hot water..
A: The temperature of shallow ground water in the U.S. ranges from 44Â°F in the north central areas to approximately 80Â°F in Florida and southern Texas. In North America, geothermal heat pumps can operate efficiently at ground water temperatures as low as 39Â°F, or even lower, with equipment currently being constructed.n the North, where the heating cycle is crucial, ground water temperatures average about 52Â°F. There is less flexibility available in severe northern climates for lowering the ground water temperature before freezing occurs.