NASA-Systems Engineering

# Volume the si unit of volume is the cubic meter this

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Unformatted text preview: place of the kelvin for expressing Celsius temperature defined by the equation t= T- T0, where t is the Celsius temperature, T is the thermodynamic temperature, and To = 273.15 K (by definition). . coulomb (C = A s) Electric charge is the time integral of electric current; its unit, the coulomb, is equal to one ampere second. farad (F = C/V ) The farad is the capacitance of a capacitor between the plates of which there appears a pascal (Pa = N/m 2) The pascal [which, in the preferred pronunciation, rhymes with rascal] is the pressure or stress of one newton per square meter. NASA Systems Engineering Handbook siemens (S = A/V ) The siemens is the electric conductance of a conductor in which a current of one ampere is produced by an electric potential difference of one volt. degree (°) 1°= (π/ 180) red minute (') 1' = (1/60)° = (π/10 800) rad second (") 1 " = (1/60)' = (π/648 000) rad sievert (Sv = J/kg) The sievert is the dose equivalent when the absorbed dose of ionizing radiation multiplied by the dimensionless factors Q (quality factor) and N (product of any other multiplying factors) stipulated by the International Commission on Radiological Protection is one joule per kilogram. Area The SI unit of area is the square meter (m2). The hectare (ha) is a special name for the square hectometer (hm2). Large land or water areas are generally expressed in hectares or in square kilometers (km2). tesla (T = Wb/m 2) The tesla is the magnetic flux density of one weber per square meter. In an alternative approach to defining the magnetic field quantities the tesla may also be defined as the magnetic flux density that produces on a one-meter length of wire carrying a current of one ampere, oriented normal to the flux density, a force of one newton, magnetic flux density being defined as an axial vector quantity such that the force exerted on an element of current is equal to the vector product of this element and the magnetic flux density. volt (V = W/A) The volt (unit of electric potential...
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## This document was uploaded on 02/26/2014 for the course E 515 at University of Louisiana at Lafayette.

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