ABSTRACT
The basic units in the SI system are listed with their symbols, in Table 1.1.
TABLE 1.1 Basic SI Units
Quantity Unit
length metre, m mass kilogram, kg time second, s electric current ampere, A thermodynamic temperature kelvin, K luminous intensity candela, cd amount of substance mole, mol
Derived SI units use combinations of basic units and there are many of them. Two examples are:
ž Velocity-metres per second (m/s) 2
denote multiplication or division by a particular amount. The six most common multiples, with their meaning, are listed in Table 1.2.
