Consider a thin 16-cm-long and 20-cm-wide horizontal plate suspended in air at 20°C. The plate is equipped with electric resistance heating elements with a rating of 20 W. Now the heater is turned on and the plate temperature rises. Determine the temperature of the plate when steady operating conditions are reached. The plate has an emissivity of 0.90 and the surrounding surfaces are at 17°C. As an initial guess, assume a surface temperature of 50°C. Is this a good assumption?

Q: Let's consider the 8-mx8-m roof of a building. Assume the roof is maintained at a constant 50°C. The…

A: Given: a×b=8m×8m Ts=50oC=323 K Tsky=-5oC=268K T∞=0oC ∈=0.75   To find: Q˙roof

Q: A person stands in front of a fire at 650 C in a room where air is at 5°C. Assuming the body…

A: Given data T = 650° C  Temperature of air = 5°C Body temperature = 37°C Coefficient of conduction =…

Q: An industrial spherical oven has 2.8 m diameter. It is placed in a factory floor where the air…

A: Given:  D = 2.8 m,    Therefore    R = 1.4 m Ta = 25 oC = 25 +273 = 298 K Qpeak load = 905 kW Ts,…

Q: The door of an oven in the kitchen of a house is 0.5 m high and 0.7 m wide. When the oven is…

A: Given, Outside temperature of the door, To=32°C=32+273 K=305 K   Temperature of the room,…

Q: A person stands in front of a fire at 650°C in a room where air is at 5°C. Assuming the body…

A: Answer: The net heat flow from the body is 291.1 W.

Q: A man is working in a chamber enclosed with black walls. If the air around the worker is at 20oC,…

A: Given data: Tw=100°C=373 KTair=20°Ch=15 W/m2°Cε=0.8 Need to determine the temperature will the…

Q: Consider a person whose exposed surface area is 1.7 m², emissivity is 0.7, and surface temperature…

A: Given data: A=1.7 m2ε=0.7Tper=32°C=305 K Need to determine the heat loss by the person.

Q: Under conditions for which the same room temperature is maintained by a heating or cooling system,…

A:

Q: inner surface of each wall is 32oC while the room air temperature is maintained at 24oC. The rate of…

A:

Q: A triangular duct whose surfaces are all black has a length of L=0.69 m. By considering the details…

A:

Q: Consider a 1 m high rectangular closed space with two surfaces separated by an air gap of 0.125 m…

A:

Q: 02. An electronic box that consumes 180 W of power is cooled by a fan blowing air into the box…

A: We are supposed to answer only 3 parts, please post remaining parts as a separate question.

Q: explain why summer is warmer than winter. Specifically, how can summer be warmer than winter if…

A: Two factors make it warmer in the summer: (1) the Sun is higher in the sky, which means more direct…

Q: A 50-cm x 50-cm circuit board that contains 121 square chips on one side is to be cooled by combined…

A:

Q: In the summer, parked automobile surfaces frequently average 104 °F to 50°C and surface emissivity…

A:

Q: Consider a person standing in a room. The inner surfaces of the walls, floors, and ceiling of the…

A:

Q: A 18-m-long section of a 14-cm-diameter horizontal hot water pipe passes through a large room whose…

A:

Q: Consider a person standing in a room with a temperature of 22°C throughout moment. It is observed…

A: To find: The heat transfer by radiation (Q). Given: The exposed surface area, A = 1.4 m2. The…

Q: A person extends her arm in a manner shown into the windy air outside the shrine. The is 53F and…

A:

Q: Determine the average temperature of the hot surface of the board, assuming the board is horizontal…

A: Given: PCB of 23 cm x 28 cm Board is horizontal, and hot surface facing up T∞=20°CHeat dissipated,…

Q: Consider a thin suspended hotplate that measures 0.25 mx 0.25 m. The isothermal plate has a mass of…

A:

Q: A certain 1m body at 20 C is display on a top of a building during the night. the body sees nothing…

A: Given data , e= 0.9  Temperature to be maintained is  T= 23°C= 296 K  T1=110 K  t= 20°C

Q: A 2-m-diameter thin-walled stainless steel spherical tank is filled with chemicals undergoing a…

A: Given data as per question Diameter =2 m Surface temperature = 500 c Air temperature  = 200 c…

Q: 16-51 Consider a person whose exposed surface area is 1.7 m², emissivity is 0.5, and surface…

A: “Since you have posted multiple questions, we will provide the solution only to the first question…

Q: 2. Consider steady heat transfer between two large parallel plates at constant temperatures of T1 =…

A: Given data: T1=295 KT2=155 KL=2 cm Need to determine the rate of heat transfer.

Q: A spherical interplanetary probe of 0.9-m diameter contains electronics that dissipate 150 W. The…

A:

Q: Consider a person standing in a room kept at 22°C at all times. It was observed that the interior…

A: According to the information we know have to Take an individual in a room always kept at 295°K. The…

Q: The solar radiation incident on the outside surface of an aluminum shading device is 1300 W/m2.…

A: Given: Solar radiation = 1300W/m2 Aluminum absorbs 10%  The convection heat transfer coefficient is…

Q: Consider steady heat transfer between two large parallel plates at constant temperatures T1 = 300 K…

A:

Q: A 1.2 m wide and 5.1 m long solar collector is mounted to a roof.  Now the average surface…

A: Given width of solar collector w=1.2 m Length of solar collector l=5.1 m Average surface temperature…

Q: A 4.74 -m-internal-diameter spherical tank made of 1.5- cm-thick stainless steel (k = 15 W/m.°C) is…

A:

Q: a certain body at 20 C is display on a top of a building during the night. the body sees nothing but…

A: Given data,  T1= 20°C = 293K  T=23°C = 296 K  To=110 K  ε= 0.92  Let the Stefan Boltzmann constant…

Q: Consider a person standing in a room maintained at20°C at all times. The inner surfaces of the…

A:

Q: Consider a 0.6-m × 0.6-m thin square plate in a room at 30°C. Both sides of the plate are maintained…

A: Given: The average film temperature. The properties of air at 60°C.

Q: An 5-m·internal-diameter spherical tank made of 1.5-cm-thick stainless steel (k = 15 W/m·C) is used…

A:

Q: Consider a thin suspended hotplate that measures 0.4 mx 0.4 m. The isothermal plate has a mass of…

A: