Page 386 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

Table 1 Derived units based on SI base units m, kg, s, cd, and A
Coulomb C electrical charge s · A
4
–1
–2
–1
Farad F electrical capacitance C · V = m · kg · s · A 2
Hertz Hz frequency s –1
Joule J heat, energy, work N · m = m · kg · s –2
2
Lumen lm light flux cd · sr
–2
Lux lx light intensity Im · m = cd · sr · m –2
Newton N force m · kg · s –2
-3
2
–1
Ohm Ω electrical resistance V · A = m · kg · s · A –2
–2
–1
Pascal P pressure N · m = m · kg · s –2
–1
–1
–2
3
Siemens S conductivity Ω = m · kg · s · A 2
Steradian sr measure of solid angle 1 1 (m · m ) and Units
–2
2
–2
–2
Tesla T magnetic flux density Wb · m = kg · s · A –1
–1
-3
2
Volt V electric potential W · A = m · kg · s · A –1
Watt W electric power J · s = m · kg · s -3 Dimensions
2
–1
2
–2
Weber Wb magnetic flux V · s = m · kg · s · A –1
1 The solid angle of a sphere is defined as the angle subtended at the center of a sphere by an area (A) on its
2
surface times the square of its radius (r ). A steradian (sr) is the solid angle for which r = 1 m and A = 1 m , 2
that is, 1 sr = 1 m /m .
2
–2
Table 2 Prefixes for fractions and multiples of units of measure
Prefix Symbol Factor Prefix Symbol Factor
deca- da 10 1 deci- d 10 –1
hecto- h 10 2 centi- c 10 –2
kilo- k 10 3 milli- m 10 –3
mega- M 10 6 micro- µ 10 –6
giga- G 10 9 nano- n 10 –9
tera- T 10 12 pico- p 10 –12
peta- P 10 15 femto- f 10 –15
exa- E 10 18 atto- a 10 –18
373
Despopoulos, Color Atlas of Physiology © 2003 Thieme
All rights reserved. Usage subject to terms and conditions of license.