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Billy Westbay, Jim Bridwell, and John Long after the first one-day ascent of the Nose in 1975. The Nose is a big wall climbing route up El Capitan. Once considered impossible to climb, [1] El Capitan is now the standard for big wall climbing. It is recognized in the historic climbing text Fifty Classic Climbs of North America and considered a ...
In the typical version of the puzzle, an otherwise empty cuboid room 30 feet long, 12 feet wide and 12 feet high contains a spider and a fly. The spider is 1 foot below the ceiling and horizontally centred on one 12′×12′ wall. The fly is 1 foot above the floor and horizontally centred on the opposite wall.
During peak daytime tourist hours, more than 168,000 m 3 (5.9 million cu ft) of water goes over the crest of the falls every minute. Horseshoe Falls is the most powerful waterfall in North America, as measured by flow rate. Niagara Falls is famed for its beauty and is a valuable source of hydroelectric power. Balancing recreational, commercial ...
The Rubik's Cube is a 3D combination puzzle invented in 1974 [2] [3] by Hungarian sculptor and professor of architecture Ernő Rubik. Originally called the Magic Cube, [4] the puzzle was licensed by Rubik to be sold by Pentangle Puzzles in the UK in 1978, [5] and then by Ideal Toy Corp in 1980 [6] via businessman Tibor Laczi and Seven Towns ...
Cube root. In mathematics, a cube root of a number x is a number y such that y3 = x. All nonzero real numbers have exactly one real cube root and a pair of complex conjugate cube roots, and all nonzero complex numbers have three distinct complex cube roots. For example, the real cube root of 8, denoted , is 2, because 23 = 8, while the other ...
On 31 May 1970, the Ancash earthquake caused a substantial part of the north side of the mountain to collapse in an avalanche with an estimated 80 million cubic metres (2.8 billion cubic feet) of ice, mud and rock, measured about 0.8 by 1.6 kilometres (0.5 mi × 1 mi).
The normal route to the summit of Mount Rainier is the Disappointment Cleaver Route, YDS grade II-III. As climbers on this route have access to the permanently established Camp Muir, it sees the significant majority of climbing traffic on the mountain. This route is also the most common commercially guided route.
List of superlative trees. The General Sherman, a California giant sequoia, is the largest tree by volume. The world's superlative trees can be ranked by any factor. Records have been kept for trees with superlative height, trunk diameter (girth), canopy coverage, airspace volume, wood volume, estimated mass, and age.