Talk:Theory of sonics

morefootnotes tag
The article is based on the "out of copyright book" of Gogu Constantinescu since the book does not give any references for elemetary physics formulas, it is hard to add foot notes.

Capacity and Condesers
Definition: Hydraulic consenser are appliances for making alterations in value of fluid currents, presssures or phases of alternating fluid currents. The apparatus usualy consist in a mobile solid body, which is dividing the liquid column, and fixed ellastically in a middle position, in such way that follow the movements of the liquid column. The principal function of hydraulic condensers is to counteract inertia effects due to moving masses.

The capacity C of a condenser consisting of a piston of section ω on which the liquid pressure is acting, held in mean position by means of springs, is given by the equation:


 * ΔV=ωΔf=CΔp

where:


 * ΔV=the variation of volume of the space for liquid;


 * Δf=the variation of the lonfitudinal position of the piston,

and


 * Δp=the variation of the pressure in the liquid.

If the piston is held by a spring at any given moment:


 * f=AF where


 * A= a constant depending on the spring

and


 * F=the force acting on the spring.

In the condenser we will have:


 * ΔF=ωΔp

and


 * Δf=AωΔp

Considering the above equations:


 * C=Aω2