You use a quantity of fuel with a total energy content of 19.02 MJ to power an engine. If the average output of the engine over 2 hours was 2.12 kW,  what is the efficiency of the engine?

Q: A coal power plant consumes 100,000 kg of coal per hour and produces 500 MW of power. If the heat of…

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Q: You observe a grasshopper eating a blade of grass. You know that each blade of grass contains 100…

A: Given that:- Energy contain in one blade of grass=100 units

Q: Water near the surface of a tropical ocean has a temperature of 298.2 K (25.0°C), while water 700 m…

A: Given: Surface high temperature, Th = 298.2 K 700 m beneath surface temperature, Ts = 280.2K

Q: A refrigerator does 26.0 kJ of work while moving 107 k] of thermal energy from inside the…

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Q: heat engine exhausts 8,200 J heat while performing 3,200 J of work. What is the efficiency of this…

A: Efficiency of heat engine is ratio of work done to the heat input .

Q: A heat pump has a coefficient of performance equal to 4.15 and requires a power of 1.61 kW to…

A: Given:Co-efficient of performance, Bh = 4.15Poer, P = 1.61 kW

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

A: Given Output Energy Eo = 180 kW = 180 x 103 W Efficiency e = 3% = 3/100

Q: Second Law of thermodynamics. An engine in performing 196 J of work discharges 34 J of heat. What is…

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Q: An automobile engine operates with an overall efficiency of 12%. How much energy in gallons of…

A: The formula for the efficiency of the automobile engine is:

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

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Q: A lawnmower engine ejects 1.00 x 104 J each second while running with an efficiency of 0.200. Find…

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Q: This problem compares the energy output and heat transfer to the environment by two different types…

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Q: the energy input to an engine is 4 times greater than the work it performs. what is its efficiency

A: Out put of the engine is the work it performs.Let it be w. Given the input is 4w Efficiency of an…

Q: Suppose that an engine has 28% overall efficiency. Find how much work is done in a time interval in…

A: The efficiency is defined as the ratio of work done to the input heat.  η = WQin Where, W is the…

Q: A heat pump is a heating system that has an efficiency of about 150 %, that is, for every joule (J)…

A: Let us first look at the statement of Second Law of Thermodynamics, the Kelvin-Planck Statement:…

Q: An automobile engine consumes fuel at a rate of 26 L/s and delivers 65 kw of power to the wheels. If…

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Q: An engine doing work isothermally takes in 10kJ and exahusts 1kJ. What is the efficiency of the…

A: Heat takes the engine,                               Heat exhausts the engine,…

Q: A heat engine receives heat in the amount of Q,= 525 kJ from a high temperature thermal reservoir…

A: Given Amount of heat received by the heat engine Qh = 525 kJ Net work done by the heat engine Wnet…

Q: An underground salt cavern has approximate dimensions of 100m x 500m x 3m. The underground salt…

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Q: An engine, operating with an efficiency of 0.225,  delivers 8.10 ✕ 105 J each minute. What is the…

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Q: A power plant has a power output of 1285 MWand operates with an efficiency of 32.4 percent. Excess…

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

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Q: In a hydroelectric power plant, 65 m3/s of water flows from an elevation of 90 m to a turbine, where…

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Q: A steam engine delivers 5.4×108 J of work per minute and services 3.6×109J of heat per minute from…

A: Given :W= 5.4 x 108JH= 3.6 x 109J

Q: A heat engine does 9,200 J of work per cycle while absorbing 22.0 kcal of heat from a…

A: The efficiency of the heat engine is defined as η=WQ×100% Here W is work done and Q is the heat…

Q: A heat engine with an efficiency of 24.0% performs 1250 J of work. Find (a) the heat absorbed…

A: efficiency = 24 % Work , W = 1250 J

Q: The heat that goes into a particular Carnot engine is 4.00 times greater than the work it performs.…

A: We have to find the efficiency of the carnot engine. We know the heat input in the carnot is 4 times…

Q: a heat engine outputs 100 Joules work and releases 400 Joules to the cold source.  what is the heat…

A: The heat energy absorbed heat engine from the hot source is given by, Qh=W+Qc Here, W is the work…

Q: What is the efficiency of a gasoline engine that receives 194.5 J of energy from combustion and…

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Q: AN IDEAL ENGINE HAS AN EFFICIENCY OF 0.725 AND USES GAS FROM A HOT RESERVOIR AT A TEMPERATURE OF…

A: Given data: Efficiency of ideal engine is, η=0.725. Temperature of hot reservoir is, TH=622 K.

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: A steam engine absorbs 7.91×105J and expels4.99 × 105J in each cycle. Assume that all ofthe…

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Q: A heat engine operates between two temperatures such that the working substance of the engine…

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Q: What is the efficiency of a heat engine that does 1250 J of work and gives off 5250 J of heat to the…

A: Let the heat given to hot reservoir be QH, the heat given to the cold reservoir be QC, the work done…

Q: A PHYS 1510 student was working on a robotics project. The joints on the machine they were building…

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Q: An engineer claims that the heat engine produces 500 J of work for every 700 J of heat exhausted.…

A: Given : Heat given : 700 J Work done : 500 J Required : Efficiency of the engine.

Q: A lawnmower engine ejects 2.55 ✕ 104 J each second while running with an efficiency of 0.235. Find…

A: Given: Rate at which the lawnmower engine rejects energy = Qc = 2.55 x 104 J/s The rate at which the…