Consider a room that is initially at the outdoor temperature of 20°C. The room contains a 60-W lightbulb, a 110-W TV set, a 300-W refrigerator, and a 1200-W iron. Assuming no heat transfer through the walls, determine the rate of increase of the energy content of the room when all of these electric devices are on

Q: Two volumes of air are separated by a thin rectangular heater (0.2 cm x 15 cm x 2 cm). The…

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Q: A source at a temperature of 600K provides 2000kJ of heat. The temperature of environment is 250C.…

A: Maximum work is the reversible work, Temperature of the source= (T1)= 600 K Heat input = Q1= 2000 KJ…

Q: A heat pump is used to maintain a house at T,°C_by House extracting heat from the outside air on a…

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Q: For an energy storage capacity of 5 × 106 kWh, determine the minimum amount of water that needs to…

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Q: Consider a TV set that consumes 120 W of electric power when it is on and is kept on for an average…

A: Given: The average time per day TV is kept on is t=6 h The power consumes by the TV is P=120 W The…

Q: Consider a heat engine operating between a high thermal reservoir at 500oC  and a low thermal…

A: GivenT1=500oC=773KT2=10oC=283KW=325kWQr=200kW

Q: Two volumes of air are separated by a thin rectangular heater (0.2 cm x 15 cm x 2 cm). The…

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Q: A house is to be maintained at 20°C when the outside air is at -25°C. It is determined that 1800 kJ…

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Q: A Carnot refrigerator consumes 2 kW of power while operating in a 20°C room. If the food compartment…

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Q: A 20-kW electric heater is used to heat up a house with size measured 6 m x 8 m x 10 m. The house is…

A: The mode of heat transfer in which molecules from a hot surface moves to a cold surface due to…

Q: Steam turbine is receiving a 1,831 lb/hr of steam, determine the kW output of the turbine if the…

A: Given: m˙=1831 lb/hr WT,out =1906 btu/lb

Q: A Carnot heat engine receives heat from a high temperature source at 655°C and rejects heat to a…

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Q: m = 0.9000 kg of water is heated with P = 481 W electric heater for t = 39 min. During this time the…

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Q: Three hundred kilojoules of heat is added in a piston cylinder arrangement containing air causing it…

A: Polytropic heat addition and work done relation is used.

Q: Heat flows through a wall of a house at a steady-state on a day when the temperature of the outdoor…

A: GivenTo=2oC=2+273=275KTi=27oC=27+273=300K

Q: Determine the second law efficiency of the heat engine operating between 650°C and 30°C. The heat…

A: The given temperatures in Kelvin are,

Q: When 100 kJ of work is done on a closed system during a process, the total energy of the system…

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Q: Two volumes of air are separated by a thin rectangular heater (0.2 cm x 15 cm x 2 cm). The…

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Q: A building receives heat of 833 kJ/min from a heat pump. The inside temperature is maintained at…

A: Given Data: Heat received by the building from the heat pump, QH= 833 kJ/min

Q: A

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Q: m = 0.9000 kg of water is heated with P = 481 W electric heater for t = 39 min . During this time…

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Q: A refrigerator has a broken light bulb inside that is constantly turned on even when the…

A: Given:Power of light bulb, P=20 WCoP of refrigerator=1.4Electricity cost=12/ kWh

Q: The work done when a gas is compressed in a cylinder is 452 J. During this process, there is a heat…

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Q: A 10 hp fan is used in a room for circulation purposes. Assuming a sealed room. that is well…

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Q: Consider a refrigerator that consumes 400 W of electric power when it is running. If the…

A: The electricity cost of this refrigerator per month (30 days) is 69 rupees

Q: A refrigerator operating between -5°C and 27°C has the capacity of 80 tons. Determine the number of…

A: Write the given data in the problem.  m=10 kgT1=27°CT2=0°C Here, m is the mass of the refrigerator,…

Q: A car engine with a power output of 64 hp has a thermal efficiency of 24%. Determine the fuel…

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Q: Solar energy stored in large bodies of water, called solar ponds, is being used to generate…

A: For solution refer below images.

Forms of Energy

Energy is described as the capability to accomplish a task, like the ability to push a block by applying force on it. It is a quantitative property that is used to accomplish work on an object.