I need help with this I dont know the word ​

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis

What is the main objective of using reheat rankine cycle?