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The states and territories included in the United States Census Bureau 's statistics for the United States population, ethnicity, and most other categories include the 50 states and Washington, D.C. Separate statistics are maintained for the five permanently inhabited territories of the United States: Puerto Rico, Guam, the U.S. Virgin Islands ...
In 2013, the 175-turbine London Array wind farm, located off the Kent coast, became the largest offshore wind farm in the world; this was surpassed in 2018 by the Walney 3 Extension. In 2013 the Offshore Energy Strategic Environmental Assessment (SEA) was first published and has been updated regularly. It is the guiding document from the UK ...
From 2011 to 2021, renewable energy grew from 20% to 28% of global electricity supply. Use of fossil energy shrank from 68% to 62%, and nuclear from 12% to 10%. The share of hydropower decreased from 16% to 15% while power from sun and wind increased from 2% to 10%. Biomass and geothermal energy grew from 2% to 3%.
Fibonacci sequence. A tiling with squares whose side lengths are successive Fibonacci numbers: 1, 1, 2, 3, 5, 8, 13 and 21. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn .
Steam is injected into many oil fields where the oil is thicker and heavier than normal crude oil. This sketch illustrates steam flooding.. Steam injection is an increasingly common method of extracting heavy crude oil.
Development XV-15 experimental tiltrotor, 1980 Early concept illustrations of V-22 In the late 20th century VTOL aircraft gained popularity, and many prototype designs were developed, but only one entered service; the Harrier fighter/attack jet used a turbo fan engine. A practical tilt-rotor remained more elusive, until finally in the 1980s the United States moved forward with V-22 design ...
A tuner for recording off-air television programmes. A clock with timer for unattended recordings. A modulator to allow connection to a normal (for the time) television receiver without audio and video input connectors. The Philips VCR system was marketed only in the U.K., mainland Europe, Australia and South Africa.
Mathematics: The probability of matching 20 numbers for 20 in a game of keno is approximately 2.83 × 10 −19. Mathematics: The odds of a perfect bracket in the NCAA Division I men's basketball tournament are 1 in 2 63, approximately 1.08 × 10 −19, if coin flips are used to predict the winners of the 63 matches. 10 −18 Snake eyes