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This is around 1 ⁄ 5 (20%) of what is needed to power a standard upright bicycle without aerodynamic cladding at same speed, and 1 ⁄ 50 (2%) of that which is consumed by an average fossil fuel or electric car (the velomobile efficiency corresponds to 4700 miles per US gallon, 2000 km/L, or 0.05 L/100 km). [22]
The high value is obtained when, after the combustion, the water in the exhaust is in liquid form. For the low value, the exhaust has all the water in vapor form (steam). Since water vapor gives up heat energy when it changes from vapor to liquid, the liquid water value is larger since it includes the latent heat of vaporization of water. The ...
The distribution system is made up of an extensive grid of water mains stretching approximately 6,800 miles (10,900 km). As of 2015, it costs the city $140 million to maintain these mains. [15] There are 965 water sampling stations in New York City. The water-sampling system has been in use since 1997.
In 2017, Pennsylvania American Water, our state's largest owner and operator of water and wastewater systems, acquired a municipal-run sewer system in McKeesport in Allegheny County.
The program covered model year 2012 to model year 2016 and ultimately required an average fuel economy standard of 35.5 miles per US gallon (6.63 L/100 km; 42.6 mpg ‑imp) in 2016 (of 39 miles per gallon for cars and 30 mpg for trucks), a jump from the 2009 average for all vehicles of 25 miles per gallon. Obama said, "The status quo is no ...
Rainy weather forced the ceremonial groundbreaking on Aug. 15, 2023, for the new half-million-gallon water tank at the Northeast Alabama Regional Megasite under a tent.
The Catskill Aqueduct carries water to New York City over a distance of 120 miles (190 km), but is dwarfed by aqueducts in the far west of the country, most notably the 242-mile (389-km) Colorado River Aqueduct, which supplies the Los Angeles area with water from the Colorado River nearly 250 miles to the east and the 701.5-mile (1,129.0 km ...
For example, if an automobile typically gets 20 miles per US gallon (12 L/100 km) with a 20% efficient engine that has a 10:1 compression ratio, a carburetor claiming 100 mpg ‑US (2.4 L/100 km) would have to increase the efficiency by a factor of 5, to 100%. This is clearly beyond what is theoretically or practically possible.