This document discusses measurement and units in mathematics and science. It explains that measurements allow scientists to quantify and express physical phenomena numerically. The International System of Units (SI or metric system) was developed in 1799 to standardize measurement units worldwide using fundamental units like meters, kilograms, seconds, and more. Standard prefixes are used to denote multiples and submultiples of units, and conversion factors are provided to relate SI units to traditional English units.

2. Mathematics
According to Lord Kelvin,
“In Physical Science one
knows what he is talking
about when he can measure
and express it in numbers.”
Therefore,
.

3. Measurements
The process of obtaining
the size or magnitude of a
quantity.

4. Measurement
MKS (Meter, Kilogram, Seconds)
CGS (Centimeter, Gram, Seconds)
FPS (Foot, Pound, Seconds)

5. (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.

6. Units
 Used in communicating
measurements and ideas world
wide.
Fundament
al/
Base
• Can be measured directly
Derive
d
• Cannot be measured directly

7. Fundamental Quantities for SI
units
Length (m)
Mass (kg)
Temperature (kelvin)
Time (s)
Amount of Substance (mol)
Electric current (A)
Luminous intensity (cd)

8.  Meter (m)
 Liter (l)
 Gram (g)
Kilo Hekto Deca m/g/L Deci Centi Milli

9. Prefixes
In addition to
mks units,
standard
prefixes can
be used,
e.g., cm, mm,
mm, nm

10. English System
Quantity Conversion factor
1 cm = 0.3937 inch
Length 1 m = 3.2808 feet
1 m = 1.0936 yard
1 km = 0.6214 statute
mile

11. English System
Quantity Conversion factor
1 g = 0.0353 ounce
Mass 1 kg = 2.2 pounds
1 kg = 0.0685 slug
1 ton = 2000 pounds
1 pound = 16 ounces