SI Derived Unit - Derived Units With Special Names

Derived Units With Special Names

In addition to the two dimensionless derived units radian (rad) and steradian (sr), 20 other derived units have special names.

Named units derived from SI base units
Name Symbol Quantity Expression in terms of other units Expression in terms of SI base units
hertz Hz frequency 1/s s−1
radian rad angle m/m dimensionless
steradian sr solid angle m2/m2 dimensionless
newton N force, weight kg⋅m/s2 kg⋅m⋅s−2
pascal Pa pressure, stress N/m2 kg⋅m−1⋅s−2
joule J energy, work, heat N⋅m = C⋅V = W⋅s kg⋅m2⋅s−2
watt W power, radiant flux J/s = V⋅A kg⋅m2⋅s−3
coulomb C electric charge or quantity of electricity s⋅A s⋅A
volt V voltage, electrical potential difference, electromotive force W/A = J/C kg⋅m2⋅s−3⋅A−1
farad F electric capacitance C/V kg−1⋅m−2⋅s4⋅A2
ohm Ω electric resistance, impedance, reactance V/A kg⋅m2⋅s−3⋅A−2
siemens S electrical conductance 1/Ω = A/V kg−1⋅m−2⋅s3⋅A2
weber Wb magnetic flux J/A kg⋅m2⋅s−2⋅A−1
tesla T magnetic field strength, magnetic flux density V⋅s/m2 = Wb/m2 = N/(A⋅m) kg⋅s−2⋅A−1
henry H inductance V⋅s/A = Wb/A kg⋅m2⋅s−2⋅A−2
degree Celsius °C temperature relative to 273.15 K K K
lumen lm luminous flux cd⋅sr cd
lux lx illuminance lm/m2 m−2⋅cd
becquerel Bq radioactivity (decays per unit time) 1/s s−1
gray Gy absorbed dose (of ionizing radiation) J/kg m2⋅s−2
sievert Sv equivalent dose (of ionizing radiation) J/kg m2⋅s−2
katal kat catalytic activity mol/s s−1⋅mol

Read more about this topic:  SI Derived Unit

Famous quotes containing the words derived, units, special and/or names:

    “There is, it seems to us,
    At best, only a limited value
    In the knowledge derived from experience....”
    —T.S. (Thomas Stearns)

    “Even in harmonious families there is this double life: the group life, which is the one we can observe in our neighbour’s household, and, underneath, another—secret and passionate and intense—which is the real life that stamps the faces and gives character to the voices of our friends. Always in his mind each member of these social units is escaping, running away, trying to break the net which circumstances and his own affections have woven about him.”
    —Willa Cather (1873–1947)

    “A special feature of the structure of our book is the monstrous but perfectly organic part that eavesdropping plays in it.”
    —Vladimir Nabokov (1899–1977)

    “All the names of good and evil are parables: they do not declare, but only hint. Whoever among you seeks knowledge of them is a fool!”
    —Friedrich Nietzsche (1844–1900)