Module 2 Flashcards
(18 cards)
Notable examples of system of units are:
- Le Systeme Internationale d’Unites (SI Units)
- American Engineering System of Units
- c.g.s. System of Units
- m.k.s. System of Units
- f.p.s. System of Units
components of system of units
base units
multiple units
derived units
A number expressed as the product of another (usually between 0.1 and 10) and a power of 10
Scientific Notation
basic concept of measurement
dimension
multiples or fractions of base units e.g. minutes, hours and milliseconds
multiple units
length in meter (m), mass in kilogram (kg) and time in second (s)
m.k.s. System of Units
It is a property that can be measured such as length, time and mass
dimension
This means that each term in an equation must have the same net dimensions and units as every other term to which it is added, subtracted or equated
dimensional consistency
The numerical values of two quantities may be added or subtracted only if the units are?
the same
length in centimeter (cm), mass in gram (g) and time in second (s)
c.g.s. System of Units
On the other hand, numerical values and their corresponding units may always be combined by?
multiplication or division
A _______________________ is a collection of units in which certain units are chosen as fundamental and all others are derived from them
System of Units
length in foot (ft), mass in pound (lb) and time in second (s)
f.p.s. System of Units
The ____________________ of a number are the digits from the first nonzero digit on the left to either
significant figures
length, mass, time, temperature, electric current, luminous intensity, amount of substance
base units
means of expressing the dimension e.g. meter, second, g
unit
The procedure for converting one set of units to another is simply to multiply any number and its associated units by ratios termed as?
conversion factors
obtained in two ways
(a) multiplying or dividing base or multiple units
(b) as defined equivalents of compound units
e.g. erg, lbf
derived units
