Special relativity can be used to study an object in which frame of reference? A. A frame of reference that has no change in velocity B. A frame of reference that is moving in a circle C. A frame of reference that has a constant, positive acceleration D. A frame of reference that has a constant, negative acceleratio

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.