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A medical thermometer showing a temperature reading of 38.7 °C (101.7 °F). Taking a human's temperature is an initial part of a full clinical examination.There are various types of medical thermometers, as well as sites used for measurement, including:
Radon is a contaminant that affects indoor air quality worldwide. According to the United States Environmental Protection Agency (EPA), radon is the second most frequent cause of lung cancer, after cigarette smoking, causing 21,000 lung cancer deaths per year in the United States.
An air quality improvement plan in 2017 appears to be showing positive results. Out of the 480 cities, Dammam in Saudi Arabia is performing the worst with PM 2.5 levels going up +111.1 μg/m 3 . The city is a significant center for the Saudi oil industry and home to both the largest airport in the world and the largest port in the Persian Gulf.
The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon–oxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140 pm length of a typical single C–O bond, and shorter than most other C–O multiply bonded functional groups such as carbonyls. [19]
Liquid hydrocarbons (fuels such as gasoline, diesel and kerosene) are today the densest way known to economically store and transport chemical energy at a large scale (1 kg of diesel fuel burns with the oxygen contained in ≈ 15 kg of air). Burning local biomass fuels supplies household energy needs (cooking fires, oil lamps, etc.) worldwide.
One major challenge is air quality, with acid rain, sulfur oxides, and annual yellow dust storms being particular problems. [133] It is acknowledged that many of these difficulties are a result of South Korea's proximity to China, which is a major air polluter. [ 133 ]
The radiation resistance is only part of the feedpoint resistance at the antenna terminals. An antenna has other energy losses which appear as additional resistance at the antenna terminals; ohmic resistance of the metal antenna elements, ground losses from currents induced in the ground, and dielectric losses in insulating materials.
During and prior to these events, Beijing's air quality improved dramatically, only to fall back to unhealthy levels shortly after. On 8 and 9 December 2015 Beijing had its first smog alert which shut down a majority of the industry and other commercial businesses in the city. [118] Later in the month another smog "red alert" was issued. [119]