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Most boats have a positive PHRF rating, but some very fast boats have a negative PHRF rating. If Boat A has a PHRF rating of 15 and Boat B has a rating of 30 and they compete on a 1 mile course, Boat A should finish approximately 15 seconds in front of Boat B. Results are adjusted for handicap by the race committee after all competitors have ...
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The following table shows progression of the world record in the men's hammer throw, as recognised by the International Association of Athletics Federations (IAAF). [1] The first world record in the event was recognised by the IAAF in 1913. [2] As of June 21, 2009, 45 world records have been ratified by the IAAF in the event. [2]
The test hammer hits the concrete at a defined energy. Its rebound is dependent on the hardness of the concrete and is measured by the test equipment. By reference to a conversion chart, the rebound value can be used to determine the concrete's compressive strength. When conducting the test, the hammer should be held at right angles to the ...
The test uses a thick-walled sampling tube, with an outside diameter of 5.01 cm (2 in) and an inside diameter of 3.5 cm (1.375 in), and a length of at least 60 cm (24 in). The sampling tube is driven into the ground at the bottom of a borehole by blows from a hammer with a mass of 63.5 kg (140 lb) falling a distance of 75 cm (30 in). The sample ...
The current Cutler Naval Station was built during 1960 and became operational on January 4, 1961. It has a transmission power of 2 megawatts. As with all VLF stations, the transmitter has a very small bandwidth, and so cannot transmit audio (speech) but only coded text messages, at a relatively low data rate.
30 July 1983 New Britain, Connecticut, United States 17 years, 67 days [11] Triple jump: 15.98 m (52 ft 5 in) (+0.6 m/s) Christian Taylor: 14 July 2007 World Youth Championships: Ostrava, Czech Republic 17 years, 26 days Shot put (5 kg) 22.00 m (72 ft 2 in) Adrian Piperi: July 15, 2015 World Youth Championships: Cali, Colombia 16 years, 176 days
The Bluejacket's Manual is the basic handbook for United States Navy personnel. First issued in 1902 to teach recruits about naval procedures and life and offer a reference for active sailors, it has become the "bible" for Navy personnel, providing information about a wide range of Navy topics. The current edition is the 26th, published in 2023.