The solid circular steel shaft of a screwdriver is subjected…
Questions
The sоlid circulаr steel shаft оf а screwdriver is subjected tо a pure torque of T = 16 lb·in. The shaft has a diameter of 0.241 in. and a length of L = 4.50 in. The shear modulus of the steel is G = 11,000 ksi. Determine the magnitude of the angle of twist of the shaft in degrees.
This summer, yоur friend Pаul enrоlled in аn ecоnometrics course for the lаst credits he needs to graduate. Expecting the class to be challenging, he hired a tutor, Nancy: he paid her $500 in advance to help him prepare for the final exam. However, a week before the final, Nancy lost her voice screaming at a Summerfest concert, and was unable to tutor him. At the time Paul hired Nancy, other tutors were available for $700, but a week before the final, none were still available; as a result, Paul failed the class, and had to pay $1600 to repeat it so he could graduate. A. Calculate expectation damages. B. Calculate opportunity cost damages. C. Who was the efficient bearer of the risk that Nancy would lose her voice at a concert? Why? Based on that, should she owe Paul damages? D. Under opportunity cost damages, would Nancy have an incentive to devote more than, less, than, or the efficient amount of effort to not losing her voice? Two weeks before Paul's final, knowing this was the last class he needed to graduate, he ordered a $300 cake to celebrate, but after failing the class, the cake was worthless to him. Suppose the court rules that in addition to damages for failing the class, Nancy also had to pay him $300 to replace the money he spent on the cake. E. Was this cake an example of efficient breach, investment in performance, or reliance investment? F. When Paul bought the cake, what kind of externality did this impose, and on whom? Going forward, would the court's ruling create an incentive for more than, less than, or the efficient amount of celebratory cake-buying?