cubic meter m3 1 cubic kilometer km3 1000000000 cubic meter m3 cubic kilometer to cubic meter, cubic meter to cubic kilometer. Home | Glossary | Notation | Links | References | CalculatorsĬontact Us to ask a question, provide feedback, or report a problem. Unit conversion is a multi-step process that involves multiplication or division by a numerical factor, selection of the correct number of significant digits, and rounding. Complete list of volume units for conversion. *If air pressure is not available, simply use a standard atmosphere of 1 atm = 101.325 kPa = 1013.25 mbar = 760 mmHg Each of these conversions is dependent upon the molecular weight of the contaminant and the temperature and pressure of the system. The SI unit of power is the watt symbol W which is a rate of 1 joule per. It is important to remember that in gas systems IS NOT equal to, nor is in gas systems equal to. This confusion arises because parts-per-billion (or million)-volume used in gas measurements is based on volume-to-volume ratio and is not the same as part-per-billion (or million) used in aqueous measurements that is based on a mass-per-mass ratio. Also, explore many other unit converters or learn more about weight and mass unit conversions.
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The confusion arises in converting from mass-per-volume to parts-per-number-volume units. Free online weight and mass converter - converts between 70 units of weight and mass, including kilogram kg, gram g, milligram mg, ton (metric) t, etc. Common units of indoor air measurements include micrograms (or milligrams) per meter-cubed, micrograms (or milligrams) per liter, parts-per-billion-volume and parts-per-million-volume. These conversions involve converting from one unit to a goal unit within the general bidirectional pathway Grams to Moles to Particles, where Particles. In evaluating indoor air concentrations of carcinogenic or toxic compounds, some confusion exists over the various units in use.
Estimation of indoor air concentrations using the Johnson-Ettinger model are commonly used in assessing vapor intrusion problems. Typically, however, vapor concentrations are present at low levels, to which long-term exposure may pose increased risk for chronic health effects. In extreme cases, the vapors may accumulate in dwellings to levels that may pose near-term safety hazards, such as explosion. Depressurization can be caused by a combination of wind effects and stack effects, which are the result of heating within the building and/or mechanical ventilation. Building depressurization may cause these vapors to enter the home through cracks in the foundation. To convert between units, youre usually given one measure and asked to convert. Volatile organic chemicals in contaminated soils or groundwater can emit vapors, which may migrate through subsurface soils and may enter the indoor air of overlying buildings. Migration of volatile chemicals from the subsurface into overlying buildings is called vapor intrusion (VI). Module Home Objectives Table of Contents Previous EPA On-line Tools for Site Assessment Calculation
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