The stress-strain graph for a glass rod, shown here up to the point where it fractures, is below. Which statement correctly describes the glass rod?
- AHooke’s law is obeyed for all values of stress up to the breaking point.
- BThe glass is ductile.
- CThe glass shows plastic deformation.
- DWhen the cross-sectional area of the rod is doubled, the ultimate tensile stress of the rod is halved.