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There is a very small difference described under "Enhancement factor" below, which can be neglected in many calculations unless great accuracy is required. Indeed, a vacuum has approximately the same equilibrium capacity to hold water vapor as the same volume filled with air both are given by the equilibrium vapor pressure of water at the given temperature. This, however, is misleading-the amount of water vapor that enters (or can enter) a given space at a given temperature is almost independent of the amount of air (nitrogen, oxygen, etc.) that is present. The notion of air "holding" water vapor or being "saturated" by it is often mentioned in connection with the concept of relative humidity. This effect can be calculated using a heat index table, also known as a humidex.
Air max 90 radiant red skin#
For animal life dependent on perspiration ( sweating) to regulate internal body temperature, high humidity impairs heat exchange efficiency by reducing the rate of moisture evaporation from skin surfaces. Humidity plays an important role for surface life. Specific humidity is the ratio of water vapor mass to total moist air parcel mass. Relative humidity, often expressed as a percentage, indicates a present state of absolute humidity relative to a maximum humidity given the same temperature. Absolute humidity is expressed as either mass of water vapor per volume of moist air (in grams per cubic metre) or as mass of water vapor per mass of dry air (usually in grams per kilogram). Three primary measurements of humidity are widely employed: absolute, relative, and specific. For example, a parcel of air near saturation may contain 28 g of water per cubic metre of air at 30 ☌ (86 ☏), but only 8 g of water per cubic metre of air at 8 ☌ (46 ☏). The amount of water vapor contained within a parcel of air can vary significantly. As the temperature of a parcel of air decreases it will eventually reach the saturation point without adding or losing water mass. The amount of water vapor needed to achieve saturation increases as the temperature increases. The same amount of water vapor results in higher relative humidity in cool air than warm air. Humidity depends on the temperature and pressure of the system of interest.
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Humidity indicates the likelihood for precipitation, dew, or fog to be present. Water vapor, the gaseous state of water, is generally invisible to the human eye. The pair will be available on the Nike app and at selected retailers such as Overkill via, for a suggested retail price of 150€ and in sizes ranging from EU 35.5 to EU 50.5.Humidity is the concentration of water vapour present in the air. The official Europe release date of this Nike Air Max 90 OG « Infrared » has been confirmed on November 28, 2020.
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This version will be delivered in an OG Air Max shoe box, accompanied by a retro tag in transparent plastic. The whole is based on the authentic tapered foam midsole in white and red combined with an outsole alternating black and red, completing the tribute.
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The side swoosh in a grey shade slightly darker than the overlays and the wide vintage tongue label, featuring Nike Air’s classic red and black branding, complete the design. The thick white tongue on the outside is also adorned with signature red on the inside. Emblematic TPE inserts in the famous bright red are found on the heel, the laceguard, under the ankle area and on the cassette that wraps the visible Air Sole unit. It consists of a shiny white nylon upper with grey suede overlays and soft, durable black synthetic leather. The 2020 shoe retains its original shape while dressing in new materials. The silhouette created by legendary designer Tinker Hatfield was originally called Air Max 3, but was simply nicknamed by its year of release, 1990, hence the popular AM90. As announced a few weeks ago, the legendary Nike Air Max 90 OG in « Infrared » colorway will make its comeback to celebrate the 30th anniversary of the silhouette launch, under the name Air Max 3 « Radiant Red ».