Suppose a contract states that the designer should bear the responsibility if substantial differences were found between the design drawings and the reality. What type of disagreement may happen due to this statement? Select one: a. Disagreement about the definition of concepts and terminology
b. Disagreement about irrelevant facts
c. Disagreement about unknown facts
d. Disagreement about the definition of facts

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?