Angle, elastic strain, Poisson's ratio are the 3 dimensionless constant unit.
In order to determine an equation's form or, more frequently, to confirm the accuracy of a calculation's result as a safeguard against numerous small errors, dimensional analysis uses a set of units.
To find out if your algebra is correct, use dimensional analysis. For instance, if you accidentally divided a mass by an area to obtain density, the answer would be given in kilograms per square meter (kg/m2). We would notice the error since we are aware that density must be expressed in kilograms per cubic meters. Be aware that improper application of A, equals, pi, d, squared, A=d2 or even A, equals, d, squared, A=d2 will invalidate the method.
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