Steady-state creep rate data are given here for some alloy taken at 200°C (473 K): (h-1) (MPa) 2.7 × 10-3 54 2.3 × 10-2 69 If it is known that the activation energy for creep is 130000 J/mol, compute the steady-state creep rate at a temperature of 230°C (503 K) and a stress level of 50 MPa.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?