A 14.8 mm-thick copper plate is cold-reduced to 6 mm and later further reduced to

2 mm.

Determine the total percent cold work.

A cylindrical specimen of copper has coldwork of 20%. If its cold-worked

The higher the misalignment angle in grain boundaries, the stronger the material.

A plastic rope has elastic modulus of 1.35 × 10⁹ Pa, a length of 66.9 m when not stretched, and a diameter of 0.80 cm. If a mountain climber of mass 57.9 kg hangs on this rope, how much does it extend in mm? 

A 19.8 cm long metallic bar with a modulus of elasticity of 10 GPa is in an elastic tension test. If the bar is exposed to a stress of 48.3 MPa what is the final length of the bar (in cm)?