In a hydroelectric power plant, 65 m3/s of water flows from an elevation of 90 m to a turbine, where electric power is generated. The overall efficiency of the turbine–generator is 84 percent. Disregarding frictional losses in piping, estimate the electric power output of this plant.

Q: Consider a coal-fired steam power plant that produces 175 MW of electric power. The power plant…

A: Given: Find  (a) the overall plant efficiency (the ratio of net electric power output to the energy…

Q: In this experiment, the expander is connected to an electrical generator, which is then connected…

A: a. Calculating Mechanical Work and Mechanical Efficiency with a Torque SensorTo calculate the…

Q: Calculate the electric power produced per square meter of windmill disk area for a windmill…

A: Given, Maximum power coefficient, Cp=0.90×0.70×0.59Cp=0.3717 Air density at sea level at 15°C,…

Q: A freezer has a coefficient of performance of 6.30. It is advertised as using 376 kWh/yr. Note: One…

A:

Q: In one cycle, a heat engine takes in 1160 J of heat from a high-temperature reservoir and releases…

A: A heat engine is a thermodynamic-engine based on the second law of thermodynamics. The heat engine…

Q: An automobile having a mass of 2 Mg travels up a 7° slope at a constant speed of v= 100 km/h (Figure…

A:

Q: A gasoline engine has a compression ratio of 6.00. (a) What is the efficiency of the engine if it…

A: a) the expression to calculate the efficiency of the engine if it operates in an idealized Otto…

Q: I often make tea in my microwave oven. I know that it takes two minutes to bring the temperature of…

A: The efficiency of a device is defined as the ratio of output energy upon the input energy.  Now…

Q: 3) A pump with an efficiency of mm% is used to pump water from a tank (stationary water inside) at…

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Q: An electric refrigerator rated 400 W operates 8 hour/day. What is the cost of the energy to operate…

A: The power of the refrigerator is 400W. The total time operated by the refrigerator is,

Q: The “Energy Guide” label on a washing machine indicates that the washer will use $85 worth of hot…

A: Given,

Q: A freezer has a coefficient of performance of 6.30. The freezer is advertised as using 495 kW-h/y.…

A: Given : Coefficient of Performance, COP = 6.3  Power, P = 495 Kw-h/y  Specific heat of water,…

Q: Calculate the net work output of a heat engine following path ABCDA in the figure below, where V₁ =…

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Q: Calculate the time taken by a 60 pulb to consume 3000 J of energy.

A: power = energy consumedtime taken60 W=3000time takenso, time taken =300060=50  seconds

Q: Consider a building whose annual air-conditioning load is estimated to be 120,000 kWh in an area…

A: Given Annual cooling load        = 120,000 kWh Electricity cost per unit    = RM 0.10 / kWh Air…

Q: Storage tan 25 m Pump

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Q: A power plant has been proposed that would make use of the temperature gradient in the ocean. The…

A: Given:-               A power plant has been proposed that would make use of the temperature…

Q: 75%. Calculate the pow air is 1.864 Kg/m³.

A: Given as, d=18 m, v=10ms , η=0.75, ρ=1.864 kgm3 .

Q: A truck mass of m=1210kg drives up an incline at a constant speed of v = 12.7 m/s. The forces of air…

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Q: In one cycle a heat engine absorbs 3.82 * 104 J of heat from the hot reservoir and rejects 3.16 *…

A: Given, Heat absorbed, Qa=3.82×104 J Heat rejected, Qr=3.16×104 J   We know, Efficiency is given by:…

Q: A diesel generator supplies a small mine, not connected to a power grid, with power. The maximum…

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Q: A Carnot cycle operating between 770 K and 300 K produces 54 kJ of work. Compute the efficiency. O…

A: Given Temperature of source (T1) = 770K Temperature of sink (T2) = 300k

Q: Electric energy is to be stored at a station in which 5000 condensers are connected in parallel. The…

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Q: During each cycle a reversible engine absorbs 3100 J of heat from a high-temperature reservoir and…

A: We are aware that the engine generates 3100 J of heat and uses 1900 J of energy to work. We have to…

Q: Solar panels are rated by their theoretical maximum output capacity. A 2-kW PV panel would…

A: There are 10 PV panels each with capacity 260W.Therefore the total power would be

Q: At a hydroelectric power plant, the water pressure head is at a height of 300 m and the water flow…

A: We have-Height of water pressure ead, h=300 mVolume of water flow per second, V=100 m3/sEfficiency…

Q: A heat engine takes in 310 J of energy from a hot reservoir and performs 27.0 J of work in each…

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Q: in 2021, the tallest building in the world, the Burg Khalifa, klas estimated at $1.5 billion.…

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Q: A heat pump removes 2060 J of heat from the outdoors and delivers 3060 J of heat to the inside of a…

A: Given data The heat removed by the pump is QL=2060 J The heat delivered by the house is QH=3060 J…

Q: Efficiency of reversible engine is maximum. Why?

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Q: What fuel economy should be expected from a gasoline powered car that encounters a total of 443N of…

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Q: Critically ill patients in a cardiovascular intensive care unit must be intensely monitored for any…

A: (a)strokevolume calculation:stroke volume(sv)is the amount ofblood pumped by the leftventricle of…