API gravity scale
the American Petroleum Institute gravity scale: a universally accepted scale of the relative density of fluids that is used in fuel technology and is measured in degrees API. One degree API is equal to (141.5/ d)–131.5, where d = relative density at 288.7KSee also Baumé scale
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What Do Hurricane Category Numbers Mean?Part of the drama of hurricane season revolves around the predicting and changing of the severity – or category – of the storm. What category will the hurricane be when it hits land? What kind of damage might it inflict? Hurricane categories There are a few classification scales that meteorological agencies use to determine the intensity of hurricanes. The Saffir-Simpson scale is used to measure the strength …
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