Consider an isolated system that is, one that does not interact with its surroundings. In this case
Q: Explain why it is not always valid that if there are two bodies with different temperature, the…
A: Amount of heat of bodies depends upon temperature, mass and specific heat capacity of the body.
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A: Given Data: The output power of the older shaft motor is (Wo)1= 75 hp The efficiency of the older…
Q: A 1000-W iron is left on the iron board with its base exposed to the air at 20°C. The convection…
A: Given, Q˙in = 1000 WT∞ = 20 °C = 293 Kh = 35 W/m2 °Cε = 0.6A = 0.02 m2
Q: Give examples of the three modes of heat transfer based on daily lives (with simple illustration)
A: To find daily life examples of modes of heat transfer.
Q: A 3 m2 hot black surface at 80 C is losing heat to the surrounding air at 25 C by convection with a…
A: Given Area, A = 3 m2 Heat transfer coefficient, h = 12…
Q: as a researcher in the field of heat transfer explain how you will distinguish between radiation by…
A: Black body – when incident rays fall on a body and body absorb all the energy then this type of body…
Q: How do convection and conduction work together to transfer heat?
A: Given Data⇒ Convection Conduction Problem definition⇒ Problem says How do convection and conduction…
Q: Consider two identical rooms,one with a refrigerator in it and the other without one .if all the…
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Q: A room is heated by a baseboard resistance heater. When the heat losses from the room on a winter…
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Q: The inverse square law of heat states that intensity of radiation is not inversely proportional to…
A: True
Q: On a summer day in Phoenix, Arizona, the inside room temperature is maintained at 68° F while the…
A: Given, TiF = 68 °FToF = 110 °F Here, o and i subscripts represent outdoor and indoor temperatures…
Q: The outer surface of a spacecraft in space has an emissivity of 0.6 and an absorptivity of 0.2 for…
A: Given that → Solar energy absorbed= Radiation emitted total incident…
Q: A crater lake has a base area of 20,000 m2 , and the water it contains is 12 m deep. The ground…
A:
Q: 7. An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of power to the wheels.…
A:
Q: In thermodynamics, how do you differentiate a closed system with an adiabatic system? What is the…
A: 1. Closed system: A closed system is a thermodynamic system through which there is no mass transfer…
Q: Consider steady heat transfer between two large parallel plates at constant temperatures of T1 = 300…
A:
Q: Is the internal energy of a solid likely to be independent of its volume, as is the case for an…
A: Yes, the internal energy of a solid is independent of its volume.
Q: Calculate the total heat transfer for 12 hours through an insulated window that measures 4 ft × 7…
A: Since the window is insulated, there should not be any transfer of heat between system and…
Q: Which of the following simultaneous heat transfer mechanisms applicable to moving fluid; a. None of…
A: We have to find Which of the following simultaneous heat transfer mechanisms applicable to moving…
Q: The Stefan-Boltzmann equation of thermal radiation applicable for the black body is given by which…
A: Stefan Boltzmann law states that for an ideal hot object radiator, the energy emitted is directly…
Q: A classroom that normally contains 40 people is tobe air-conditioned with window air-conditioning…
A:
Q: A classroom that normally contains 40 people is to be air-conditioned with window air- conditioning…
A: Given Data: The cooling capacity of the air conditioner is 5 kW
Q: What are the equations for heat transfer from conductions, convection, and radiation?
A: The conduction heat transfer mainly occurs in solid to solid heat transfer and its equation is…
Q: On a hot summer day, a workshop employee turns his fan on when he leaves the room in the morning.…
A: Given data Discuss the following scenarios related to the first law of thermodynamics.
Q: 2–105 The outer surface of a spacecraft in space has an emis- sivity of 0.6 and an absorptivity of…
A: Given Emissivity = 0.6 Radiation, Q = 1000 W/m2 Find Surface temperature, T
Q: -is a thermodynamic process during which the volume of the closed system undergoing such a process…
A:
Q: 19 Consider a pan of water being heated (a) by placing it on an electric range and (b) by placing a…
A: We are authorized to answer three subparts at a time since you have not mentioned which part you are…
Q: Portable electric heaters are commonly used to heat small rooms. Explain the energy transformation…
A: Given:1st Law of thermodynamics: According to this law, total energy of the system is conserved,It…
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A: Area of the cross-section =2(1.2)=2.4m2 To find out the equivalent resistance R=Rconv,…
Q: If ice in a plant is made at -6°C and if temperature difference between ice and refrigerant is 5°C,…
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Q: Consider steady heat transfer between two large parallel plates at constant temperatures T1 = 300 K…
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Q: Isovolumetric process is also known as Select one: O a. Constant Pressure Process O b. Constant…
A: The term Isovolumetric is a combination of two words that is iso and volumetric where iso means same…
Q: j) During sleeping the body of an adult male generates 1- 50 W of heat 2- 75 W of heat 3- 87 W of…
A: During the whole 24 hours of a day, the human body releases heat. It depends on several factors such…
Q: 16. At winter design conditions, a house is projected to lose heat at a rate of 60,000 Btu/h. The…
A: Given :- Rate of heat Loss = 60000 Btu/h Internal heat gain = 6000 Btu / h To find :- Required…
Q: Define the control volume can involve fixed, moving, real, and imaginary boundaries.
A: Real Boundary: In a real boundary, no mass transfer is possible. Example: Cylinder pistons, walls of…
Q: (b) Consider a person standing in a room maintained at 25°C at all times. The inner surfaces of the…
A: Given datafor winterTsur=15°Cfor summerTsurr=28°CA=1.5m2Ts=30°Cε=0.95
Q: In heat transfer analysis, the cooling of an apple in a refrigerator is considered as Steady heat…
A: Solution:
Q: What is the energy conservation? Explain how can we save energy? What is the difference between…
A: Hello. Since your question has multiple parts, we will solve first question for you. If you want…
Q: Bodies with relatively large thermal masses can be modeled as thermal energy reservoirs.
A: Thermal Reservoirs: A thermal reservoir is a thermodynamic system having a high heat capacity so,…
Q: When is a system a closed system, and when is it a control volume?
A: Closed system: A closed system is defined when a particular quantity of matter is under study. A…
Q: 3.) The outer surface of a spacecraft in space has an emissivity of 0.8 and a solar absorptivity of…
A: Heat absorbed will be equal to the heat radiated.
Q: Surface quality is affected due to Resistance strength of contact surfaces O Friction resistance of…
A: Given Surface quality To find Reason which affect surface quality
Q: Determine the net heat transferred by radiation from a 9-ft square hot plate to a cold plate of…
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Q: An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of power to the wheels. If…
A: Given: The value of the fuel rate is f=22 L/h. The value of power delivered to the wheel is Pw=55…
Q: An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of power to the wheels. If…
A: Given data: Fuel consumption rate = 22 L/hr Brake power = 55 kW…
Q: (i) What is a thermal energy reservoir? Give some examples.
A: Thermal energy reservoir: Thermal energy reservoir is a body with very large heat capacity that can…
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- The tip of a soldering iron consists of a 0.6-cm- diameter copper rod, 7.6 cm long. If the tip must be 204C, what are the required minimum temperature of the base and the heat flow, in watts, into the base? Assume that h=22.7W/m2KandTair=21C.2.34 Show that the temperature distribution in a sphere of radius . made of a homogeneous material in which energy is released at a uniform rate per unit volume , isA mass of 7 kg undergoes a process during which velocity decreases from 32 m/s to 19m/s, while the elevation remain unchanged. The initial specific internal energy of the mass is 1.24 kJ/kg and the final specific internal energy is 2.08 kJ/kg. During the process, the mass receives 2 kJ of energy by heat transfer through its bottom surface and loses 0.8 kJ by heat transfer through its top surface. How much is the work in kJ? (hint: be consistent with units) ( 2 decimal places)
- A 0.4 kgkg piece of ice at -15 ∘C∘C is dropped from a height hh. Upon impact, 7.0 %% of its kinetic energy is converted into heat energy. Part A If the impact transforms all of the ice into water that has a final temperature of 0 ∘C∘C, find hh. Express your answer in meters.Work is done on an adiabatic system due to which its velocity changes from 10 m/s to 20 m/s, elevation increases by 20 m and temperature increases by 1 K. The mass of the system is 10 kg, Cv = 100 J/kg-K and gravitational acceleration is 10 m/s² .if there is no change in any other component of the energy of the system, find out the magnitude of total work done on the system.In an industrial process, 300 kJ of work is needed to compress 4 kg of nitrogen. During compression, 270 kJ of heat is rejected to the surrounding air. Determine the change in specific internal energy of nitrogen.
- A force F=12N acting on an object 1 m along a horizontal surface. The force acts at a 30o angle. Determine the work force done by force F.Find the change in specific internal energy of 10 kg of oxygen gas when the temperature changes from 38° C to 50°C. The specific heat at constant volume of oxygen is 0.658 kJ/kg K.A steel billet of 2000 kg mass is to be cooled from 1250 K to 450 K. The heat released during this process is to be used as a source of energy. The ambient temperature is 303 K and specific heat of steel is 0.5 kJ/kgK. The available energy of this billet is?
- give two example and explanation of thermal energy transformation at constant volume, pressure and heat that happen in dailyA system receives 42 kJ of heat while expanding with volume change of 0.123 m3 against an atmosphere of 12 N/cm2. A mass of 80 kg in the surroundings is also lifted through a distance of 6 metres. (i) Find the change in energy of the system. (ii) The system is returned to its initial volume by an adiabatic process which requires 100 kJ of work. Find the change in energy of system. (iii) Determine the total change in energy of the system.q0.5 liters of liquid water at 15°C is contained in a piston-cylinder with stops as shown. The piston has a mass of 320 kg and a diameter of 10cm. Stops in the cylinder are at 60cm The system is heated until the water reaches 300°C a.Find the thermal energy in kJ that is needed for this process. [1495kJ]