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Flashcards in dimensions, units, and conversions Deck (12)
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1

The Magna Carta (1215) also attempted to
standardize measurements throughout the kingdom,
although it concentrated on measures of beer and
wine.

true

2

dimensions divided into two areas

fundamental & derived

3

fundamental

length, mass, time, temp, electrical current, luminous intensity, (angle)

4

derived

velocity, acceleration, force, pressure, energy/work, power, frequency, electrical resistance, electrical potential, capitance,inductance, magnetic flux

5

dimensional systems

 Absolute System
 Dimensions are not affected by gravity.
 Fundamental dimensions; Length (L), Time (T) & Mass(M).
 Widely used in the scientific branches.
 Example: SI System (a.k.a. Metric System)
 Gravitational System
 Gravitational force affects dimensions.
 Fundamental dimensions; Lengh (L), Time(T) & Force(F).
 Widely used in the engineering branches.
 Example: US Customary System

6

absolute system

Absolute System
 Dimensions are not affected by gravity.
 Fundamental dimensions; Length (L), Time (T) & Mass(M).
 Widely used in the scientific branches.
 Example: SI System (a.k.a. Metric System)

7

dimensional systems

 Gravitational System
 Gravitational force affects dimensions.
 Fundamental dimensions; Lengh (L), Time(T) & Force(F).
 Widely used in the engineering branches.
 Example: US Customary System

8

International System of Units

 Abbreviated SI from the French Le Système
International d'Unités
 Modern form of the metric system
 Developed in 1960 from the old metre‐kilogram‐
second system
 The world's most widely used system of
measurement

9

base SI units

foundational units upon which all other units are based.

10

supplementary SI units

may be considered as base or derived units

11

derived SI units

formed by combining base, supplementary or other derived units

12

US Customary versus SI System

 US customary system is a gravitational based system
 SI system is an absolute based system
 US customary system is at the mercy of “local” gravity
 SI system is independent of gravity
 US customary system sees very limited use
 SI system is used globally