This question probably is referring to a 2% secant modulus, which can be the tensile, flexural or compressive modulus (slope of a stress/strain curve) of a material that is determined from calculating the slope of a line drawn from the origin to 2% strain on a stress/Strain curve.
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The secant modulus is the total stress or strain on an object as described by a stress-strain graph. The tangent modulus is the marginal strain.
2*pi radians.
|2| = y is valid, but the use of modulus is pointless in this equation, since |2| = +2. The equation, therefore, is y = 2 If, instead, the equation were 2 = |y|, then you would have y = -2 or +2.
yes
It is 2*sqrt(3)/3.