Russian ice skater, alina zagitova, spins her way to projected gold in the 2018 olympics. during one particular spin, she moves from a camel spin that rotates at about 95.0 rpm to a tight spin. if her rotational inertia changes from 129kgm² to 32.0kgm², what is the final spin rate of miss zagitova in rad/s and rpm

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.