Suppose a woman does 350 J of work and 9700 J of heat is transferred from her into the environment in the process  What is the change in her internal energy, in joules, assuming she does not consume any food?  What is her percent efficiency?

Q: How much heat will occur from a system if has and internal energy that is decreased by 150 J while…

A: Given: The decrease in internal energy is U=-150 J. The work done is W=30 J.   The expression from…

Q: If 500 J of heat is added to a gas that 215 J of work as a result, what is the change in the energy…

A: Given, Heat added to system (Q) = 500J  Work done by system (W)= 215 joule  We want to find change…

Q: Compare the thermodynamic efficiency limits for heat engines operating from a) a 150 degrees C…

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Q: In each cyde of its operation, a heat engine expels 2,900 J of energy and performs 1,100 J of…

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Q: 4)) An engine is found to have 0.73 efficiency. If it does 218 J of work per cycle, what is the heat…

A: Write the expression for the efficiency of the engine. Here, W is the work done and Qin is the heat…

Q: The heat machine receives 1200 J of heat from hi heat source and re lease the heat of 9o0 Ĵ to low…

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Q: ASK YOUR TI Suppose a woman does 913 J of work and dissipates 8,254 J of heat in the process. (a)…

A: ∆U=Q-W=8254 J-913 J=7341 J2.39×10-4 kcal1 J=1.75 kcal

Q: An object initially at rest and on the floor, is acted upon by an upward force, F. The force applies…

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Q: (example question from slides) By removing energy by heat transfer from its freezer component at a…

A: (a) The maximum COP. (b) The minimum theoretical power required by the refrigerator at steady…

Q: What is the mechanical work output per cycle and thermal efficiency of an engine that takes 19 kJ of…

A: Please see the answer below.

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

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Q: A heat engine operating between energy reserviors of 123.08 oC and 411.490C has 20.18% of the…

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Q: It is just a discussion problem without calculation When ice melts at 0°C its volume decreases. Is…

A: Before we answer that, lets clear something up:   Ice is a solid, whose molecules are structured in…

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

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Q: In the steam engine, the amount of heat is 4.18J and work is 2.0J, what is the change in internal…

A: Amount of heat, Q = 4.18 J Work, W = 2.0 J Change in internal energy of the system, ∆U = ?

Q: A heat engine with an efficiency of 38% takes in 65 kJ of heat. How much waste heat does it expel…

A: Given  Efficiency η=0.38 Heat intake Q1=65kJ

Q: 64. GO The inside of a Carnot refrigerator is maintained at a temperature of 277 K, while the…

A: Given data The temperature inside the refrigerator Tl = 227 K. The temperature inside the kitchen is…

Q: ) When two objects are in ,then heat flows out from hot to coid. During this process the internal…

A: i) not thermal equilibrium; decreases increases

Q: that work and heat are not exact functions.

A: Quantities whose values are independent of the path are called state function . Differential of…

Q: What is the change in entropy of 20 g of ice at 0 °C when it melts to become water at 0 °C?

A: Given that,Mass of the ice : m = 20 (g)Initial temperature : Ti = 237 (K)Here we need to find the…

Q: A certain heat engine does 31.2 k of work and dissipates 8.34 k of waste heat in a cydical process.…

A: Given Data: The work done by the engine is, W=31.2 kJ The dissipated heat energy is,…

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

A: Given Heat given recieved by the heat engine = 1200 J Heat released by the heat engine = 804 J We…

Q: gas enclosed in a chamber absorbs 949.70 J of heat and during the same time does 353.61 J of work on…

A: Heat absorbed = 949.70 J  Hence, heat added to system q = - 949.70 J Work done by system W = 353.61…

Q: Consider a sphere that has a uniform heat generation and in conduction occuring only steady state…

A: Consider the given equation 1r2ddrkr2dTdr +E =0kr2dTdr  =-Er2drkr2dTdr  =-∫Er2dr  kr2dTdr =-Er33dTdr…

Q: alculate the increase in entropy of the Universe when you add 20.0 g of 5.00°C cream to 200 g of…

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Q: Air is heated into a container. During heating 2 kj of heat is transfered to the air and 1 kJ of…

A: The heat energy is the sum of internal energy and work done. The SI unit of internal energy is…

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

A: The thermal efficiency (η) also the performance of a machine is expressed as the fraction of heat…

Q: While walking 300000J give off, the internal energy decreased by 750000J. Find the work ??

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Q: during isothermal process of an ideal gas whose internal energy only depends on its temperature does…

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Q: An inventor claims a new cyclic engine that uses organic grapejuice as its working material.…

A: heat absorbed, QH = 1250 J  temperature of hot reservoir, TH = 1010 K work, W = 1120J temperature of…

Q: Determine the speed of each disk after the collision. X Your response differs from the correct…

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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)

Q: A refrigerator has COP of 5. How much work must be supplied to the refrigerator in order to remove…

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Q: What is the change in internal energy () of a system when it does 27 J of work while absorbing 34 J…

A: The first law of thermodynamics is the law of conservation of energy. It states that the total…