InterviewSolution
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InterviewSolution
| 1. |
The SI units |
| Answer» The seven SI base units, which are comprised of:Length - meter (m)Time - second (s)Amount of substance - mole (mole)Electric current - ampere (A)Temperature - kelvin (K)Luminous intensity - candela (cd)Mass - kilogram (kg)<br>The International System of Units (SI units)The SI units has seven base units and all the other are derived from these seven base units and are called derived units\tBase Physical quantitySymbolSI unitsLengthlMeter (m)MassmKilogram(kg)TimetSec(s)TemperatureTKelvin(K)Electric currentIAmpere(A)Amount of SubstanceNMole(M)Luminous intensityIvCandela(cd)\tSpeed, Volume, density can be derived from these base Units.Some Common Physical quantity and their derived units\tPhysical QuantitySymbolNameUnitMassm , MkilogramkgLinear positionLength, DistanceRadiusx, rl, dRmetermTimet,secondsAreaA-m2VolumeV-m3Density\xa0-kg/m3Linear velocityv, u, c-m/sLinear momentump-kg*m/sLinear accelerationa-m/s2ForceFnewtonN=kg*m/s2ImpulseI-N*sWorkEnergyWEjouleJ=N*mPowerPwattW=J/s\tSI Unit system allow the use of prefix to show multiples or sub multiple of units\tPrefixes in SI system MultiplePrefixSymbol10-12picop10-9nanon10-6microμ10-3millim10-2centic10-1decid10decada102hectoh103kilok106megaM109gigaG1012teraT\t | |