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Weight Density Specific


The weight specific of a substance is defined as its weight per unit volume .

is calculated by dividing the weight of a body or material portion of the volume it occupies. In Technical System , measured in kiloponds by cubic meter (kp / m). In International System of Units , in newton by cubic meter (N / m).

\gamma = \frac {P}{V} = \frac {mg}{V}= \rho\ g

Where:

\gamma\, = weight
P\, = the weight of substance
V\, = the volume that the substance occupies
\rho\, = is the density of the substance
g\, = is the acceleration of gravity

As kilopond represents the weight of a kilogram on Earth, this figure expressed in kp / m has the same numerical value as the density expressed in kg / m³.

As we see, is intimately linked to the density of any material and easy to use in ground units. However, its use is very limited or even incorrect in physics.

Ivan Avila Monroy

http://es.wikipedia.org/wiki/Peso_espec% C3% ADfico

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