9. If T is the torque applied to a hollow mbe with outsidediameter =db/ and inside diameter =di , then write the formula for the maximum shearing stress xy in terms of T, do \& di 10. What is Poisson's ratio? 9onitionqts at secistor id avodnodito anoh ib 11. If the stress at a point is x, then the strain x=x/E. True or False? nims? timok d 13. If the stress at a point is x and y, then the strain x=x/Ex/E. True or False? zervis larmol b 14. If the stress at a point is xy, then express the principal normal stresses 1 and 2 in terms of xy. Draw a Mohr circle and show your work. numes to 1 and 2 in terms of