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Colchuck Lake has an area of approximately 87.8 acres (0.355 km 2) and a maximum surface elevation of 5,570 feet above sea level, depending on the fluctuation of the depth of the lake. The lake has a tributary basin of 941 acres (3.81 km 2 ) acres, and an average storage capacity estimated at 1,570 acre-feet.
The most notable difference in marking is observable when comparing the foot of the "Y" in "HALFPENNY"—the rarer of which presents a double foot, while the more common version displays a single foot. The Australian Numismatic Dealers Association regards the double foot 1939 halfpenny as an "extremely rare coin in uncirculated condition." [7]
Webb has a 6.5-meter-diameter (21-foot) gold-coated beryllium primary mirror made up of 18 separate hexagonal mirrors. The mirror has a polished area of 26.3 m 2 (283 sq ft), of which 0.9 m 2 (9.7 sq ft) is obscured by the secondary support struts, [ 16 ] giving a total collecting area of 25.4 m 2 (273 sq ft).
The elevation of Austin varies from 425 feet (130 m) to approximately 1,000 feet (305 m) above sea level. [61] Due to the fact it straddles the Balcones Fault , much of the eastern part of the city is flat, with heavy clay and loam soils, whereas the western part and western suburbs consist of rolling hills on the edge of the Texas Hill Country ...
The screw steamer had a wooden single deck with two masts and an elliptical stern, with a length of 137 feet 2 inches (41.81 m), [1] breadth of 29 feet 7 inches (9.02 m) [1] and depth of 7 feet 5 inches (2.26 m).
The UNISERVO used metal tape: a 1 ⁄ 2-inch-wide (13 mm) thin strip of nickel-plated phosphor bronze (called Vicalloy) 1200 feet long. These metal tapes and reels were very heavy with a combined weight of 25lbs. [ 1 ]
HMS Orpheus was a British Modified Lowestoffe-class fifth-rate frigate, ordered on 25 December 1770, as one of five fifth-rate frigates of 32 guns each contained in the emergency frigate-building programme inaugurated when the likelihood of war with Spain arose over the ownership of the Falkland Islands (eight sixth-rate frigates of 28 guns each were ordered at the same time).
Because the Moon continuously blocks the view of a half-degree-wide circular area of the sky, [l] [219] the related phenomenon of occultation occurs when a bright star or planet passes behind the Moon and is occulted: hidden from view. In this way, a solar eclipse is an occultation of the Sun.