Task 1 from c to d Task 1(a) Look at planet earth in space as part of the solar system: is the earth in space an isothermalor an adiabatic system? Explain your answer.(b) In cold winter: in one room there is an electric heater, which is left plugged in and working.Is this a heat or work interaction with the system? Take the entire room, including the electricheater, as the system.(c) Which process requires more energy: completely vaporizing 100 kg of saturated liquid waterat 1 atm pressure or completely vaporizing 100 kg of saturated liquid water at 5 atm pressure?(d) For a cycle, is the net work necessarily zero? For what kinds of systems will this be the case?

As asked by the student, solving the c and d part of the question. Given Data: c) Mass of the…

c) Which process requires more energy: completely vaporizing 100 kg of saturated liquid water at 1 atm pressure or completely vaporizing 100 kg of saturated liquid water at 5 atm pressure? d) For a cycle, is the net work necessarily zero? For what kinds of systems will this be the case?

c) Which process requires more energy: completely vaporizing 100 kg of saturated liquid water at 1 atm pressure or completely vaporizing 100 kg of saturated liquid water at 5 atm pressure? d) For a cycle, is the net work necessarily zero? For what kinds of systems will this be the case?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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(b) After graduation, you decided to work overseas to experience living in a country with four seasons. Your neighbour, knowing that you are an engineer asked your help to install a heat pump system for his house. He wanted to always maintain the temperature in his house at 24°C during winter. In that area during winters, average outside temperature is -3°C. He also has an underground water well with average water temperature of 10°C during winter. You estimated that the heat losses from the house under the average outside temperature to be 75000 kJh. Investigate the most economical mean to power the heat pump (by calculating the minimum power required) if you can choose to extract heat from either: i. The outside air at average temperature of -3°c ii. The well water at 10°C State the reasoning for your calculations.
3.) When a gas surrounded by air is compressed or expands adiabatically, its temperature rises or decreased even though there is no heat input or dissipated to the gas. Where does the energy come from to raise or lower the temperature? 4.) Why must a room air conditioner be placed in a window rather than just set on the floor and plugged in? Why can a refrigerator be set on the floor and plugged in?
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. a. A group of engineering students designs an electric heater with a power rating of 15 kW. If 10 kg of ice at 200 K is placed in the heater, how many minutes will it take to change ice to steam at 400 K. Assume 100% efficient.
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Question 6: Find the required length of a 5 cm-diameter tube to heat water from an inlet temperature of 30 °C to an outlet temperature of 100 °C using either: a) Constant temperature of 200 °C, or b) Constant heat flux of 10,000 W/m?. The mass flow rate of the water is 0.5 kg/s, its thermal conductivity is 0.04 W/m.K and its specific heat is 4190 kJ/kg.K. Assume a fully-developed flow.
4. Explain the working principle of different types of geothermal energy systems with neat diagram
An electric home stove with 3 burners and microwave is used in preparing a meal asfollows. Burner 1: 20 minutes Burner 2: 40 minutes Burner 3: 15 minutes . Microwave: 30minutes. If each burner is rated at 1.2 kW and the oven at 1.8 kW, and electricity costs 1000(IQ =Iraqi Dinar) per k Wh, calculate the cost of electricity used in preparing the meal?
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Hello Sir,Good Morning.I have a question in my homework related thermodynamics lesson. The following below is my question. Please advice. Thank you. Regards,Irfan An air conditioning system is used to keep the house at 65°F when the outside temperature is 85°F. The house gets heat through the walls and windows at a rate of 810 Btu/min, and the rate of heat generation inside the house from occupants, lights, and equipment is 120 Btu/min. Determine the minimum power input required for this air conditioning system.
Refrigerationa.) Explain why you can’t cool down your kitchen by leaving your refrigerator or freezer door open with your refrigerator plugged in for an extended period of time.b.) The condenser of a home refrigerator is commonly underneath the appliance, thus the condensing refrigerant exchanges heat with household air, which averages 70oF. It is proposed toreconfigure a refrigerator so that the condenser is in the garage, where the average yearly temperature is about 50oF. Assume a freezer temperature of 0oF, a minimum temperature difference of 10K for heat transfer, and an actual coefficient of performance of 60% that of a Carnot cycle. Calculate the Coefficient of Performance for both configurations and discuss the pros and cons of this proposal.c.) Which is the most effective way to increase the coefficient of performance of a Carnot refrigerator: to increase TC with TH held constant or to decrease TH with TC held constant? Justify mathematically. For a real refrigerator, do…