(1a) What is the kinetic energy in joules of a 1030-kg automobile traveling at 97 km/h? =__________ J (1b) How much work would have to be done to bring a 1030-kg automobile traveling at 97 km/h to a stop?  =__________J (1c) How much heat in kcal must be added to 0.31 kg of water at room temperature (20°C) to raise its temperature to 34°C? =_________ kcal

Q: By how much must one lower the temperature of a 65 – g of aluminum to change its internal energy by…

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Q: Can improved engineering and materials be employed in heat engines to reduce heat transfer into the…

A: Heat engine works in a cycle. Second law of thermodynamics implies that no system can entirely…

Q: In a gas expansion, 81 J of heat is absorbed by the system, and the energy of the system decreases…

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Q: How much heat transfer occurs from a system, if its internal energy decreased by 50 J while it was…

A: given that,Internal energy decreased:∆U=- 50 Jwork done:∆W=120 J

Q: A pot containing 3.80 kg of water is sitting on a hot stove, and the water is stirred violently by a…

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Q: A 68 kg cyclist is pedaling down the road at 15 km/h, using a total metabolic power of 480 W. A…

A: The total chemical energy (C.E) (metabolic power) can be converted into thermal energy (Th.E) and…

Q: A 68 kg cyclist is pedaling down the road at 15 km/h, using a total metabolic power of 480 W. A…

A: Given: The mass of the cyclist is m=68 kg. The speed of the cyclist is v=15 km/h. By applying…

Q: How much work can a heat engine emit for each kilogram of burned coal with an combustion heat of 16…

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Q: Suppose a 10.00-kg mass drops through a height difference of 3.00 m, and the resulting work is used…

A: The gravitational potential energy is calculated by using the formula E=mg∆h , where m=10 kg is 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: 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: The work done in moving an object from A to B against a non- conservative force O is always entirely…

A: Introduction: The non-conservative force is that type of force where work done depends upon the…

Q: A weightlifter curls a 35 kg bar, raising it each time a distance of 0.60 m. How many times must he…

A: A slice of pizza contains 1260 J. A fraction of this energy can be used as work and the remaining is…

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: 9.The heat exhausted to the heat sink by a gasoline heat engine of a SUV is twice the mechanical…

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

A: First law of thermodynamics assigns that the change in internal energy of a system is equal to the…

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…

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Q: Air flows steadily at a rate og 0.5 kg/s through an air compressor, entering at 7 m/s, 100 kPa of…

A: Air flow rate through the compressor,  m' = 0.5 kg/s  velocity of air at the inlet to compressor ,…

Q: A refrigerator has an ice tray compartment at -18.0°C and the room temperature is 29.2°C. The…

A: Given data: Temperature of ice, ∆Tice=-180C Temperature of water, ∆Tw=29.20C Mass, m=37.8 g Specific…

Q: On a cold day, a heat pump absorbs heat from the outside air at -10°C and transfers it into a home…

A: Given value--- cold temperatures = - 10 degree C. Hot temperatures = 30 degree C. We have to…

Q: Consider the change in the internal energy of a system. -What is the change in the internal energy,…

A: Given data: Work done by the system (W) = 4.725×105 J Heat added (Qin) = 3.2×106 J Heat rejected…

Q: -What is the change in internal energy of a system which does 3.5 x 10^5 J of work while 3.00×10^6 J…

A: Given data The work done by the system is W = 3.5 x 105 J. The heat transferred to the system is…

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

A: Given: Man's mass, m=70 kg Time, t=30 min=30×60=1800 sec Power, P=1000 W

Q: A heat pump is used to maintain a house at 25°C by extracting heat from the outside air on a day…

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Q: A Carnot air conditioner takes energy from the thermal energy of a room at 70 F and transfers it as…

A: The temperature are given in Fahrenheit. Convert these temperatures into Kelvin.

Q: While walking you give off 4.0x10^5J of heat and your internal energy decreased by 6.0x10^5 J. How…

A: Given information: Here, ΔQ is the heat released by the person’s body while walking, and ΔU is the…

Q: When 345 g of water at 35.0 °C and 295 g of water at 63.0 °C are added together in a calorimeter,…

A: Consider the first water solvent in the mixture. Let Q1, m1, S, and T1 denote the quantity of heat…

Q: Air flows steadily at the rate of 0.5 kg/s through an air compressor, entering at 7 m/s speed, 100…

A: Given: m˙=0.5kg/s, v1=7m/s, P1=100×103Pa, V1=0.95m3/kg, v2=5m/s, P2=700×103Pa, V2=0.19m3/kg,…

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…

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

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Q: In an air compressor the compression takes place at a constant internal energy such that 50 kJ of…

A: First law of thermodynamics

Q: Is it impossible to convert the heat from a single source into work without any other effect? How?

A: According to the Kelvin statement in the second law of thermodynamics , it is not possible  to…

Q: A (9.20x10^1)-kg block of ice at 0.00°C breaks off from a glacier, slides along the frictionless ice…

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Q: A heat engine does 8.1 × 107 J of work when supplied 10.9 × 107 J. What is its efficiency?

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Q: internal energy

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Q: You add 2353 J of heat to a system at constant pressure of 2.03 x105 Pa.  While doing so, its…

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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.