Monday, June 4, 2007

1.1 UNIT AND STANDARDS MEASUREMENT

UNIT


LENGTH

The distance traveled by light in a vacuum during time interval of 1/299792458 second
Meter (m)

MASS

The mass of a specific platinum –iridium alloy cylinder kept at the International Bureau of Weights and Measure at Sevres , France.
Kilogram(kg)

TIME

9 192 631 770 times the period of oscillation of radiation from the cesium atom.
Second(s)


TEMPERATURE

1/273.15 of the thermodynamic temperature for the triple point of water
Kelvin(K)


ELECTRIC CURRENT

The value of the full current which flowa in two straight and parallel conductors of infinite length neglecting the area with a force magnitude 2 X 10 -7 Newtons permeter length acts upon those two wires
1 Ampere (A)

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