SYSTEM of UNITS (SI)
is a modernized version of the metric system established by
international agreement that provides a logical and interconnected
framework for all measurements in science, industry and commerce.
This system is built on a foundation of seven base units and all other
units are derived from them.
According to the US Department of Commerce
National Bureau of Standards use of metric measurement was legalized
in the United States
in 1856 and our everyday customary
BASE UNITS of measurement are
defined in terms of the
meter for length and
kilogram for mass.
other units are derived from the base unit meter. For Essentials of SI: Base and Derived Units visit http://physics.nist.gov/cuu/Units.html meter
UNIT - meter (m) - LENGTH.
Up until 1983 the meter was defined as 1,650,763.73
wavelengths in a vacuum of the orange-red line of the spectrum of
krypton-86. And since then it is determined to be the distance traveled
by light in a vacuum in 1/299,792,45 of a second.
UNIT - second (s) - TIME
The second is defined as the duration of 9,192,631,770
cycles of the radiation associated with a specified transition of the
UNIT - kilogram (kg) - MASS
The standard for the kilogram is a cylinder of
platinum-iridium alloy kept by the International Bureau of Weights and
Measures in Paris.
A duplicate at the National Bureau of Standards
serves as the mass standard for the United States. The kilogram is the
only base unit defined by a physical object.
UNIT - Kelvin (K) and degree Celsius (ฐC)
The Kelvin is defined as the fraction 1/273.16 of the
thermodynamic temperature of the triple point of water; that is, the
point at which water forms an interface of solid, liquid and vapor. This
is defined as 0.01 ฐC on the Celsius scale and 32.02 ฐF on the
Fahrenheit scale. The temperature zero K (Kelvin) is called
UNIT - ampere (A) - ELECTRIC
The ampere is defined as that current that, if maintained
in each of two long parallel wires separated by one meter in free space,
would produce a force between the two wires (due to their magnetic
fields) of 2 x 10-7 N (newton) for each meter of length. (a
newton is the unit of force that, when applied to one kilogram mass would
experience an acceleration of one meter per second, per second).
UNIT - candela (cd) - LUMINOUS
The candela is defined as the luminous intensity of
1/600,000 of a
square meter of a cavity at the temperature of freezing
platinum (2,042 K). COMPLETE TEMPERATURE DETAILS VISIT http://lamar.colostate.edu/~hillger/temps.htm
UNIT - mole - (mol) AMOUNT OF
The mole is the amount of substance of a system that
contains as many elementary entities as there are atoms in 0.012
kilogram of carbon-12.
For Classroom Learning Only.
Must Be Certified Public Education Facility.
One printing per session.
Duplication is Prohibited.
you can divide
10 equal parts
(10 cm each side)
a cube (1000 cmณ) of it to fill
and you will find that it contains
1 L (1 litre)
is the mass
kg (1 kilogram) (1000 g).
ALL SIMPLY RELATED