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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 ...
As part of the Fit to Fight program, the Air Force adopted a more stringent physical fitness assessment in 2004 and replaced the annual ergo-cycle (stationary bike) test that the Air Force had used for several years. [1] [2] Results are stored in the Air Force Fitness Management System (AFFMS) and accessible via the AF Portal. [3]
In 2009, the tournament moved to the Pumpkin Ridge Golf Club near North Plains, and drew a tournament record crowd of 87,800 at the Ghost Creek Course. [2] In 2009 and 2010 , the course par was increased to 72 for the tournament, as the ninth hole was modified to a par-5; the result was three consecutive reachable par-5's (8,9, & 10) which ...
Lackland Air Force Base in 1948 Air Force trainees in 1962. Lackland Air Force Base conducts the Air Force's only enlisted recruit training program, ensuring orderly transition from civilian to military life. Recruits are trained in the fundamental skills necessary to be successful in the operational Air Force.
The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]
Since an acre is defined as a chain by a furlong (i.e. 66 ft × 660 ft or 20.12 m × 201.17 m), an acre-foot is 43,560 cubic feet (1,233.5 m 3). There has been two definitions of the acre-foot (differing by about 0.0006%), using either the international foot (0.3048 m) or a U.S. survey foot (exactly 1200 / 3937 meters since
Air changes per hour, abbreviated ACPH or ACH, or air change rate is the number of times that the total air volume in a room or space is completely removed and replaced in an hour. If the air in the space is either uniform or perfectly mixed, air changes per hour is a measure of how many times the air within a defined space is replaced each hour.
The 96 TW is the test and evaluation wing for Air Force air-delivered weapons, navigation and guidance systems, command and control (C2) systems, and Air Force Special Operations Command systems. The Eglin Gulf Test Range provides approximately 340,000 square kilometres (130,000 sq mi) of over water airspace.