A tensile test of 70-30 brass produced the following data (none of these readings was taken at maximum load).
Load (kN): Initial=0, Reading 1=53.8, Reading 2=55.1, Fracture=0
Diameter (mm): Initial=12.8, Reading 1=11.4, Reading 2=10.7, Fracture=8.26
Length (mm): Initial=50.8, Reading 1=63.5, Reading 2=68.6, Fracture=74.9
Calculate:
(a) The tensile strength of the specimen.
(b) The maximum engineering strain during the test.
(c) The diameter of the specimen at the instant of maximum load.