Contact each media channel to learn which reporter covers your topic and/or industry (depending on the story). Select this feature and you should have the ability to view a long list of websites belonging to organizations in the same industry. Have you come across any major complaints from previous customers? But why do we have such a button in the first place ? A reversible adiabatic expansion takes place till the pressure falls to I bar. Where r is called the expansion ratio. Calculate: (a) The work done (b) Index of expansion if the above processes are replaced by a single reversible polytropic process giving the same work between same initial and final states. A centrifugal pump delivers 2750 kg of water per minute from initial pressure of 0.8 bar absolute to a final pressure of 3.8 bar absolute. If the suction and delivery pipes are of 15cm and 10cm diameter respectively, make calculations for power required to run the pump.

The suction pressure is 2m below and delivery is 5m above the center of pump. Fig. shows all the above processes. Ans. Fig. 13 (a) shows a completely closely filled vessel with a perfect gas being heated from outside. The Fig. shows the curves of expansion and compression of a perfect gas for different values of in. Q.13 During a non flow frictional less compression process, the volume changes from 0.12 m to 0.04 m and system rejects 40 kJ of heat. Drive an expression for flow work. State the meaning of that work is the energy in transit. 2. Lowered Stress Levels: Employees often face stressful situations and this constant tension extracts energy out of their body rendering them to perform lower than their potential. 2. The energy of an isolated system is always constant. When a system undergoes a thermodynamic- cycle then the net heat supplied to the system from the surroundings is equal to not work done by system on its surroundings.

Find net work done and the net heat transfer during the cycle. An isolated system is one in which there is no energy no mass transfer of system with the with surroundings. Since there is no expansion of gas, no work (mechanical) is being done by the system. It is clear that higher the value of n, steeper is the curve of expansion or compression. Ans. (a) Isothermal process is a process of expansion and compression of a gas during which temperature of gas remains constant. There is no change of internal energy and enthalpy remains constant. Sure, there are some times that are better than others, but the most important thing that you can do is to start your application process right now, because cruise line companies are employing throughout the year. Q.10. 0.44 kg of air at 180°C expands adiabatically to three times its original volume and during the process, there is fall of temperature to 15°C The work done during the process is 52.5 kJ.

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