Give two examples of reversible processes and two examples of irreversible processes in purely mechanical systems, such as blocks sliding on planes, springs, pulleys, and strings. Explain what makes each process reversible or irreversible.
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Give two examples of reversible processes and two examples of irreversible processes in purely mechanical systems, such as blocks sliding on planes, springs, pulleys, and strings. Explain what makes each process reversible or irreversible.
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- Needs Complete typed solution with 100 % accuracy.A definite area or space where some thermodynamic process 4 نقاط * :takes place is known as Thermodynamic process Thermodynamic cycle O Thermodynamic law O Thermodynamic system OExplain why it is impossivle for any process to be more than 100% efficient. Give an example of a process that is not very effecient and explain where it 'loses' energy.
- Consider a Carnot thermal machine. During a reversible process the system a) is close to equilibrium only at the beginning and end of the process. is always very close to the equilibrium state. b) c) may not be close to equilibrium d) is close to equilibrium only at a point in the middle of the process.A thermodynamic process can be represented using a PV diagram where the pressure and volume at every stage is recorded. In the thermodynamic process shown below the work done by the system is РА A O the area under the PV curve and positive the area under the PV curve and negative B is the product of the change in volume during the process and the change in pressure. cannot be found from the PV graphConsider a refrigerator undergoing a cycle. a. What is the maximum coefficient of performance that an ideal refrigerator can achieve if it operates between thermal reservoirs at 150K and 220K? b. Is it possible for a refrigerator operating between the same two temperatures of part (a) to have heat transfer in to the cycle of 34 kJ and heat transfer out of 42 kJ? Why or why not?
- Q2/ A reversible process should fulfill certain conditions, State these conditions?Spontaneous processes do not exists 2. Which of the following mechanical processes are not reversible, in the 2 sense that energy converted from one form to another cannot be completely converted from the second form back to the first form? * O A ball is tossed upward, gaining height. A moving block slides to a stop because of friction. O A moving cart is caught by a spring, stretching the spring.QUESTION 4 In a single cycle, heat engine extracts 8.00 kcal of heat from a hot reservoir and exhausts 5.00 kcal of heat int a cold reservoir. What is the efficiency of this engine? а. 67.5% b. 77.5% C. 57.5% d. 47.5% е. 37.5%