While walking you give off 4.0x10^5J of heat and your internal energy decreased by 6.0x10^5 J. How much work have you done while walking?

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

A:

Q: If 100 J of heat is added to a system that does 40 J of external work, by how much is the internal…

A: Given Data: The heat energy added is, H = 100 J. The work done is, W = 40 J. Let ∆E be the change…

Q: The temperature of 2.27 kg of air is decreased from 148.9oC to 4.44oC while the pressure is…

A:

Q: Suppose a certain heat engine has an efficiency of 25%. In order for this heat engine to do 450 J of…

A: Given data: The efficiency of engine is η=25%=0.25. The work done by engine is W=450 J.

Q: A swimmer does 7.7 * 105J of work and gives off 3.9 * 105J ofheat during a workout. Determine ∆U, W,…

A: By swimming , swimmer losses heat, so Q=-3.9×105 J A swimmer does 7.7×105 J so, W=7.7×105 J

Q: A model steam engine of 1.00 kg mass pulls eight cars of 1.00 kg mass each. The cars start from rest…

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Q: Rocky spends all the afternoon hours watching sports on cable TV. In the process, he does 1118 J of…

A: Rocky spends all the afternoon hours watching sports on cable TV. In the process, he does 1118 J of…

Q: A system does 2.00 x 10° ) of work while 6.20 x 10 ) of heat transfer occurs to the environment.…

A: Given : Work done by the system (W) = 2 x 108 J Heat transfer to the environment (Q) = -6.2 x 108 J…

Q: Calculate the net work output (in J) of a heat engine following path ABCDA in the figure, where V, =…

A:

Q: A worker drives a 0.500 kg spike into a rail tie with a 2.50 ksledgehammer. The hammer hits the…

A: The expression for kinetic energy (KE) KE = 12× Mass (m) × {speed (v)}2

Q: Rocky spends all the afternoon hours watching sports on cable TV. In the process, he does 1,179 J of…

A:

Q: The kinetic and potential energy of an object as it moves along the x axis is represented by the…

A: Given:  Energy vs distance graph is given:  From x = 0 m to x = 100 m, Work done on the object = 3…

Q: A system does 1.95 × 108 J of work while 7.5 × 108 J of heat is transferred from the system to the…

A: Given data:  Work done by the system (W) = 1.95×108 J Heat transferred from the system to the…

Q: During running, you lost 4.0×104 J of heat, and your internal energy also decreased by 1.6×105 J.…

A: Change in Internal energy, ∆U=-1.6×105J Heat lost, Q=-4.0×104J

Q: A 62.0 kg skier is moving at 6.90 m/s on a frictionless, horizontal, snow-covered plateau when she…

A: The given values are, m=62.0 kgvi=6.90 m/sL=4.80 mμk=0.300h=2.50 m

Q: A system does 1.80×108 J of work while 7.50×108J of heat transfer occurs to the environment. What is…

A: The work done by a given system is, The amount of heat transferred from the system to the…

Q: What work done on the system if the change in internal energy results to - 300j when the system…

A: To determine: The work done on the system   Given: Change in internal energy, ∆U=-300 J Heat…

Q: Which condition results to work done greater than the change in internal energy?     ΔU > 0; ΔS >…

A:

Q: If the net work is 89 kJ and the efficiency is 61% how much heat is added in the system? O 145.98 kJ…

A: When we are transferring energy or doing some work then all of the work does not go into the system.…

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: An ideal heat engine operates between 177 degree C and 27 degree C. If the engine takes 5*1000000 J…

A:

Q: In moving out of a dormitory at the end of the semester, a student does 2.12x 104 J of work. In the…

A: according to 2md law of thermodynamics  Q = W + U      Q = heat given to the system W = work done b…

Q: When one gallon of gasoline is burned in a car engine, 1.19 x 108 J of internal energy is released.…

A: given, When one gallon of gasoline is burned in a car engine, 1.19 x 108 J of internal energy is…

Q: It is important for the body to be able to cool itself even during moderate exercise. Suppose a 70kg…

A:

Q: Constants A crate of fruit with a mass of 32.5 kg and a specific heat capacity of 3650 J/(kg K)…

A: Mass of crate (m) = 32.5 kg Specific heat of crate (C) = 3650 Jkg-CDistance moved (d) = 8.80 m Angle…

Q: 500 J of work are done on a system in a process that decreases the system's thermal energy by 300 J…

A:

Q: You push a 33-kg table across a 6.2-m-wide room. In the process, 1.5 kJ of mechanical energy gets…

A: the expression for mechanical energy is

Q: A heat engine operating between energy reservoirs at 20°C and 600°C has 30% of the maximum possible…

A:

Q: A heat engine does 4.6 × 107 J of work when supplied 8.9 × 107 J. What is its efficiency?

A: The efficiency be given as, Where, W be defined as work. Q be defined as the heat supplied.

Q: A heat engine is involved with exchange of heat of 1915 J, - 40 J, +125 J and - Q J, during one…

A:

Q: 8000 J of heat from a hot reservoir is put into a reversible (Carnot) heat engine whose hot and cold…

A:

Q: A 150J of energy is added to a system that does 50J of work. By how much will the internal energy of…

A: Answer:-  Given  Energy was added to the system (Q) = +150 J Work done by the system (W) = + 50 J…

Q: Do you do work on the outside world when you rub your hands together to warm them? What is the…

A: When you rub both hands together heat is generated due to friction. You have to work to overcome…

Q: In cooling down milk, the internal energy changes by -400 J. If -450 J of heat was absorbed by the…

A:

Q: If a machine does 74.76 kJ of work after an input of 88.36 kJ of heat, what is the change in…

A:

Q: a motor that absorbs 2500 J of heat while doing 1700 J of work. What is thechange in the motor’s…

A:

Q: internal energy

A:

Q: In moving out of a dormitory at the end of the semester, a student does 1.82 x 104 J of work. In the…

A: Given Work done, W=1.82×104J Internal energy, ∆U=4.07×104J

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.