please solve the questions, if you know some of them that fine. A closed system

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please solve the questions, if you know some of them that fine.

A closed system undergoes a thermodynamic cycle consisting of the following processes. Considering negligible kinetic and potential energy changes sketch the cycle (approximately) on T-v diagram, calculate the net work for the cycle. Define a cycle using an example. Explain isenthalpic process If pressure in a system is 50 lPa Vacuum, what is the absolute pressure in the system? The kinetic energy is defined by mv2 / 2 derive its unit. Using a block diagram, explain how a power cycle works. calculate the cycle efficiency in problem 2 above. The volume of a closed system can change, True or False, explain why?

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