Select the correct answer. Ruby wants to create a cube puzzle game. For that she has to create a cube. Which drafting tool do you think she should use to create the cube? ОА. a French curve and a ruler OB a compass and a protractor Oc. a ruler and a protractor OD. a triangle and a T-Square O E. a ruler and a compass

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?