3. How long could a 2000 Hp motor be operated on the heat energy liberated by 1 mi.' of ocean water when the temperature of the water is lowered by 1 degree Celcius and if all these heat were converted to mechanical energy?

Q: The heat machine receives 1200 J of heat fvom high-temperature heat source and release the heat of…

A:

Q: 17. In a very mild winter climate, a heat pump has heat transfer from an environment at 5 °C to one…

A: The higher temperature, The lower temperature,

Q: In a given location, would a helicopter require more energy in summer or winter to achieve a…

A: Helicopter requires more energy in summer to create the same lift . In summer since temperature is…

Q: 3. (a) What is the efficiency of a cyclical heat engine in which 75.0 kJ of heat transferoccurs to…

A:

Q: Example 4 A bag of wheat weighs 100 kg. To what height should it be raised so that its potential…

A:

Q: 1. An engine with an efficiency of 0.2 absorbs 510 J of heat per cycle. (a) How much work does it…

A: Efficiency of an engine is defined as: Efficiency η=work performedheat absorbed…

Q: What happens to the efficiency of the heat engine when the amount of heat it absorbs from the hot…

A: Given data:  Heat absorbed from hot reservoir = Heat released to cold reservoir Qh = Qc Required:…

Q: Question #: 23 If a person who normally requires an average of 12,000 kJ (~ 3000 Cal) of food energy…

A: If a person who normally requires an average of 12,000 kJ (3000 kcal) of food energy per day…

Q: 4. (a) Calculate the theoretical efficiency for an Otto-cycle engine with ? = 1.40 and ? = 9.50. (b)…

A: in this question  we take a ideal otto cycles  efficiency  equation and put value  in it.

Q: During each cycle of its operation, a certain gasoline engine consumes 500 joules of chemical while…

A: Write the given values with the suitable variables. Q1=500 JQ2=300 J Here, Q1 and Q2 are the heat…

Q: TH= 600K Hot source QH 1200 kJ W engine Qc= 800 kJ Cold sink T= 200K

A: Given  QC = 800 kJ , QH = 1200 kJ,  TC = 200 K, TH =  600 K ,

Q: What is the maximum efficiency of a heat engine whose operating temperatures are 700 ∘C and 330 ∘C?

A: Given: Lower temperature, T1 = 330 ℃ Higher temperature, T2 = 700 ℃ To determine : the maximum…

Q: One of the most efficient engines ever built is a coal-fired steam turbine in the Ohio valley,…

A:

Q: tor to the turbines at a temperature of 560 ° C. If the turbines release heat at a temperature of…

A:

Q: Additional than turning off the air conditioner and pulling down the windows, what are some other…

A: Additional than the given two, following are some methods to conserve energy in a car :- 1. Keep…

Q: Explain why heat engines are never 100% efficient?

A:

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

A:

Q: 1. Suppose a woman does 600 J of work and -9400 J of heat transfer occurs into the environment in…

A:

Q: If the engine does 5.0 J of work per cycle, how much heat per cycledoes it absorb from the…

A:

Q: Calculate the maximum possible efficiency of a heat engine that uses surface lake water at 20.7°C as…

A:

Q: An arrow in a bow in a bow has 270 (J) of potential energy. Assuming 100 (J) of energy were…

A:

Q: 0.90 L of 25 °C water is placed in a refrigerator. The refrigerator's motor must supply an extra 9.0…

A: Approach to solving the question:Please see attached photos for detailed solutions. thank you.…

Q: a refrigerator removes heat from the cubicle at the rate of 20kj and ejects 24kj into a room per…

A: Given in question:   Heat removed from the cubicle per cycle(QR) = 20 KJ…

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…

A:

Q: 1. A heat engine with an efficiency of 35% does 600 J of work in each cycle. How much heat must be…

A: Given values: Efficiency of heat engine in percentage, η=35 % Work, W=600 J

Q: Why do we not use brakes with more than 80% efficiency in automobiles? What should be the minimum…

A: we do not use brakes with more than 80% efficiency in automobiles

Q: 7. An engine releases 1675 J of energy per cycle and performs 200J of work. What is the thernal…

A: The thermal efficiency of an engine is given by e% = WQin×100, where W = work done by the engine Qin…

Q: Is the efficiency of a heat engine more in hilly areas than in the plains? Why?

A: Efficiency of heat engines depend on source and sink temperatures. η=1-TsinkTSourceFrom the above…

Q: The heat machine receives 1200 J of heat from high-temperature heat source and re lease the heat of…

A:

Q: 1. An engine with an efficiency of 0.2 absorbs 485J of heat per cycle. (a) How much work does it…

A:

Q: How much energy would you consume daily if you kept 3 lightbulbs of 25 watts on all day long?.

A:

Q: Rub your hands together vigorously. What happens? Discuss the energy transfers and transformations…

A: Hands are felt warm when rubbed. When we rub the hands,hands are having kinetic energy .It is the…

Q: An engine absorbs 500 J of heat and reject 100 J of heat to cold reservoir in each cycle.  What is…

A: Given data: The amount of heat absorb is QH=500 J. The amount of heat reject is QL=100 J.

Q: Efficiency of reversible engine is maximum. Why?

A:

Q: A refrigerator removes 30.0 kcal of heat from the freezer and releases 68.5 kcal through the…

A: A refrigerator is a device that works on the reverse Carnot cycle.Using energy conservation…

Q: b) Energy may be stored for use during peak demand by pumping water to a high reserveir when needed.…

A: Given: The height is h=135 m. The time is t=10 h. The rate is r=1.35X105 kg/s. Part (i) The…

Q: 3. A multicylinder gasoline engine in an airplane, operating at 2500 rev/min, takes in energy 7.89 x…

A: Given Frequency of engine, f=2500rev/min Intake energy, Qi=7.89×105J Exhaust energy, Qe=4.58×105J a.…

Q: 1. Suppose a woman does 600 J of work and -9500 J of heat transfer occurs into the environment in…

A: Workdone, W = 600 JHeat transferred, Q = -9500 J

Q: With 2.56 × 10^6 J of heat transfer into an engine, it performs only 1.50 × 10^5 J of work. (a) What…

A: Given data:  Heat transfer into the engine QH = 2.56×106 J Work done (W) = 1.50×105 J Required: The…

Q: The ideal efficiency for a heat engine operating between the temperatures of 430 degrees C and 27…

A: The correct answer is 57% i.e. option (A)