dimensions, units, and conversions

Question 1

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

Answer 1

true

Question 2

dimensions divided into two areas

Answer 2

fundamental & derived

Question 3

fundamental

Answer 3

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

Question 4

derived

Answer 4

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

Question 5

dimensional systems

Answer 5

 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

Question 6

absolute system

Answer 6

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)

Question 7

dimensional systems

Answer 7

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

Question 8

International System of Units

Answer 8

 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

Question 9

base SI units

Answer 9

foundational units upon which all other units are based.

Question 10

supplementary SI units

Answer 10

may be considered as base or derived units

Question 11

derived SI units

Answer 11

formed by combining base, supplementary or other derived units

Question 12

US Customary versus SI System

Answer 12

 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