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One GGE of natural gas is 126.67 cubic feet (3.587 m 3) at standard conditions. This volume of natural gas has the same energy content as one US gallon of gasoline (based on lower heating values : 900 BTU/cu ft (9.3 kWh/m 3 ) of natural gas and 114,000 BTU/US gal (8.8 kWh/L) for gasoline).
At 1 atm pressure, it reaches its maximum density of 999.972 kg/m 3 (62.4262 lb/cu ft) at 3.98 °C (39.16 °F). [ 54 ] [ 55 ] Below that temperature, but above the freezing point of 0 °C (32 °F), it expands becoming less dense until it reaches freezing point, reaching a density in its liquid phase of 999.8 kg/m 3 (62.4155 lb/cu ft).
The density at the surface is 65 kg/m 3 (4.1 lb/cu ft), 6.5% that of water [88] or 50 times as dense as Earth's atmosphere at 293 K (20 °C; 68 °F) at sea level. The CO 2 -rich atmosphere generates the strongest greenhouse effect in the Solar System, creating surface temperatures of at least 735 K (462 °C; 864 °F).
Confucius considered himself a transmitter of cultural values inherited from the Xia (c. 2070–1600 BC), Shang (c. 1600–1046 BC), and Western Zhou (c. 1046–771 BC) dynasties. [3] Confucianism was suppressed during the Legalist and autocratic Qin dynasty (221–206 BC), but survived.
The Mikoyan MiG-29 (Russian: Микоян МиГ-29; NATO reporting name: Fulcrum) is a twin-engine fighter aircraft designed in the Soviet Union.Developed by the Mikoyan design bureau as an air superiority fighter during the 1970s, the MiG-29, along with the larger Sukhoi Su-27, was developed to counter U.S. fighters such as the McDonnell Douglas F-15 Eagle and the General Dynamics F-16 ...
Pakistan boasts attractions from mangroves in the south to Himalayan hill stations in the northeast, including ancient Buddhist ruins of Takht-i-Bahi and Taxila, the 5,000-year-old Indus Valley civilization sites such as Mohenjo-daro and Harappa, [444] and numerous mountain peaks over 7,000 metres (23,000 feet). [445]
[163] [164] [165] It is estimated that the amount of water in the upper mantle of Mars, represented by hydroxyl ions contained within Martian minerals, is equal to or greater than that of Earth at 50–300 parts per million of water, which is enough to cover the entire planet to a depth of 200–1,000 metres (660–3,280 ft).
Stonehenge in Wiltshire is a ring of stones, each about 4 m (13 ft) high, 2 m (7 ft) wide and 25 tonnes, erected 2400–2200 BC. Settlement by Cro-Magnons of what was to become the United Kingdom occurred in waves beginning by about 30,000 years ago. [45]