Each bar is 10 in long and has a solid circular cross section. Bar A has a diameter of 1 in and its shear modulus is 6E6 psi. Bar B has a diameter of 2 in and its shear modulus is 3.8E6 psi. The ends...

Each bar is 10 in long and has a solid circular cross section. Bar
A
has a diameter of 1 in and its shear modulus is 6E6 psi. Bar
B
has a diameter of 2 in and its shear modulus is 3.8E6 psi. The ends of the bars are separated by a small gap. The free end of bar
A
is rotated 2^o
about the bar’s axis, and the bars are welded together. What are the magnitudes of the angles of twist (in degrees) of the two bars afterward?