Final answer:
The student is asking about the properties of a solid shaft made of brass, including allowable stress, allowable strain, elastic modulus, and shear force.
Step-by-step explanation:
The subject of this question is Physics.
The student is asking about the different properties of a solid shaft made of brass: allowable stress, allowable strain, elastic modulus, and shear force.
Allowable stress refers to the maximum stress the brass can withstand without permanently deforming, while allowable strain refers to the maximum strain or deformation the brass can experience without breaking. The elastic modulus is a measure of how stiff and rigid the brass is, and the shear force is the force acting parallel to the cross-section of the shaft, causing it to deform.