Measurement

A quantitative

data

The use of MathematicsAccording to Lord Kelvin, “In

Physical Science one knows what he is talking about when he can measure and express it in numbers.” Therefore, Mathematics can be considered a language of the Physical Science.

MeasurementsThe process of obtaining

the size or magnitude of a quantity.

Systems of MeasurementMKS (Meter, Kilogram, Seconds)

CGS (Centimeter, Gram, Seconds)

FPS (Foot, Pound, Seconds)

International System (SI)In 1799, the International System (SI) also known as the Metric System was developed. It aimed in adopting a uniform way of measuring things for the world.

UnitsUsed in communicating

measurements and ideas world wide.Funda

mental/Base

• Can be measured directly

Derive

d

• Cannot be measured directly

Fundamental Quantities for SI unitsLength (m)Mass (kg)Temperature (kelvin)Time (s)Amount of Substance (mol)Electric current (A)Luminous intensity (cd)

Meter (m)Liter (l)Gram (g)

Kilo Hekto Deca m/g/L Deci Centi Milli

PrefixesIn addition to

mks units, standard prefixes can be used, e.g., cm, mm, mm, nm

English SystemQuantit

yConversion

factor1 cm = 0.3937 inch

Length 1 m = 3.2808 feet1 m = 1.0936 yard1 km = 0.6214 statute mile

English SystemQuantit

yConversion

factor1 g = 0.0353 ounce

Mass 1 kg = 2.2 pounds1 kg = 0.0685 slug1 ton = 2000 pounds1 pound = 16 ounces