量的名称(Quantity) SI导出单位(SIderivedunits) 名称(Name) 符号(Symbol) 用SI基本单位和SI导出单位表示(ExpressionintermsofSIbaseunitsandotherSIunits) 频率(frequency) 赫[兹](hertz) Hz 1Hz=1s-1 力(force) 牛顿(newton) N 1N=1kg·m/s2
(Expression in terms of SI base units and other SI units) 频率(frequency) 赫[兹] (hertz) Hz 1 Hz=1 s-1 力(force) 牛顿(newton) N 1 N=1 kg·m/s2 压力,压强,应力(pressure, stress) 帕斯卡(pascal) Pa 1 Pa=1 N/m2 能(量),功,热量(energy, work, quantity of heat) 焦耳 (joule)...
SI Unit 国际标准单位 Base units can be combined to derive units of measurement for other quantities. In addition to the twodimensionlessderived unitsradian(rad) andsteradian(sr), 20 other derived units have special names. Named units derived fromSIbase units Other common units, such as thelitre...
Fundamental Units: length, mass, time, electric current, temperature, luminous intensity and quantity of matter. QuantityStandard UnitSymbol Length metre m Mass kilogram kg Time second s Electric current ampere A Temperature Kelvin K Luminous intensity candela cd Matter mole molSI Fundamental Unit Supp...
Derived QuantityDerived UnitSymbolExpression plane angleradianradm·m-1 solid anglesteradiansrm2·m-2 frequencyhertzHzs-1 forcenewtonNm·kg·s-2 pressure, stresspascalPam-1·kg·s-2 energy, work, quantity of heatjouleJm2·kg·s-2 power, radiant fluxwattWm2·kg·s-3 ...
Thus for the same given quantity of heat extracted by the mould over a given area, Flood and Hunt suggested that the interface in the case of the planar front would advance 17 times faster, and therefore have a much finer structure than the unmodified alloy. Sign in to download full-size...
What is unit weight? Where is the International System of Units used? How does a quantity differ from a unit? What does "deci-" mean in math? What does km stand for? What does dg stand for in metric system? What is the English system of measurement?
jouleJenergy, work, heatN⋅m = C⋅V = W⋅s coulombCelectric charge or quantity of electricitys⋅A ohmΩelectric resistanc impedance, reactanceV/A henryHinductanceV⋅s/A = Wb/A teslaTmagnetic fieldstrengthV⋅s/m2 = Wb/m2 = N/(A⋅m) ...
Quantity Description Symbol Expression in terms of SI base units acceleration meter per second squared m/s2 m s-2 area square meter m2 m2 coefficient of heat transfer (often used symbol h or U) watt per square meter Kelvin W/(m2K) kg s-3 K-1 concentration (of amount of substance) mol...
SI derived unit Derived quantityNameSymbol dynamic viscosity pascal second Pa·s moment of force newton meter N·m surface tension newton per meter N/m angular velocity radian per second rad/s angular acceleration radian per second squared rad/s2 heat flux density, irradiance watt per square met...