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Groundhog burrows usually have two to five entrances, providing groundhogs their primary means of escape from predators. The volume of earth removed from groundhog burrows in one study averaged 6 cubic feet (0.17 m 3) per den. The longest burrow measured 24 feet (7.3 m) plus two short side galleries. [15]: 108–109
In form, it is a truncated pyramid, 62 feet (19 m) square at the base and 39.4 feet (12.0 m) at the top. The four sides are identical in appearance. Above the door on each side, there are ten disks upon which Bartholdi proposed to place the coats of arms of the states (between 1876 and 1889, there were 38 of them), although this was not done.
The longest venomous snake, with a length up to 18.5–18.8 ft (5.6–5.7 m), is the king cobra, [1] while contesters for the heaviest title include the Gaboon viper and the Eastern diamondback rattlesnake. All of these three species reach a maximum mass in the range of 6–20 kg (13–44 lb).
The number of leg-bearing segments varies within each order (usually 21 or 23 in the Scolopendromorpha; from 27 to 191 in the Geophilomorpha), [18] but the total number of pairs is always odd, so there are never exactly 100 legs or 100 pairs, despite the group's common name. [1] [19] [20] [21] Centipede segments are developed in two phases.
The weight of the second phase walls (from 150 feet to 500 feet) are 21,260 long tons (23,810 short tons; 21,600 tonnes). The walls of the entire shaft (combined first and second phases) are 500 feet 5 + 1 ⁄ 8 inches (152.530 m) high. [11] The first phase of the walls was constructed under the direction of William Dougherty.
The foot (standard symbol: ft) [1][2] is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is commonly used to represent the foot. [3] In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet. Since an international agreement in 1959 ...
A 6-meter (20 ft) long female great white, which the authors considered the largest 'reasonably trustworthy' total length, produced an estimate of 16.8 meters (55 ft). However, based on the largest female great white reported, at 7.1 meters (23 ft), they estimated a maximum estimate of 20.2 meters (66 ft). [35]
[20] [47] These girders are extremely large; one such girder measures 8 feet (2.4 m) deep, 6.75 feet (2 m) wide, and 23 feet (7.0 m) long. [31] For the wind bracing, the entire Woolworth Building was considered as a vertical cantilever, and correspondingly large girders and columns were used in the construction.