Fundamentals Of Thermal-fluid Sciences In Si Units
5th Edition
ISBN: 9789814720953
Author: Yunus Cengel, Robert Turner, John Cimbala
Publisher: McGraw-Hill Education
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Chapter 16, Problem 90RQ
(a)
To determine
The surface temperature when it consumes 700 W.
(b)
To determine
The surface temperature when it consumes 700 W taking radiation into consideration.
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Chapter 16 Solutions
Fundamentals Of Thermal-fluid Sciences In Si Units
Ch. 16 - Prob. 1PCh. 16 - Judging from its unit W/m·K, can we define thermal...Ch. 16 - Which is a better heat conductor, diamond or...Ch. 16 - How do the thermal conductivity of gases and...Ch. 16 - Why is the thermal conductivity of superinsulation...Ch. 16 - Why do we characterize the heat conduction ability...Ch. 16 - Consider an alloy of two metals whose thermal...Ch. 16 - What are the mechanisms of heat transfer? How are...Ch. 16 - Write down the expressions for the physical laws...Ch. 16 - How does heat conduction differ from convection?
Ch. 16 - Does any of the energy of the sun reach the earth...Ch. 16 - How does forced convection differ from natural...Ch. 16 - What is the physical mechanism of heat conduction...Ch. 16 - Consider heat transfer through a windowless wall...Ch. 16 - Consider heat loss through the two walls of a...Ch. 16 - Consider two houses that are identical, except...Ch. 16 - Consider two walls of a house that are identical...Ch. 16 - Define emissivity and absorptivity. What is...Ch. 16 - What is a blackbody? How do real bodies differ...Ch. 16 - A wood slab with a thickness of 0.05 m is...Ch. 16 - The inner and outer surfaces of a 4-m × 7-m brick...Ch. 16 - The inner and outer surfaces of a 0.5-cm thick 2-m...Ch. 16 - An aluminum pan whose thermal conductivity is 237...Ch. 16 - The north wall of an electrically heated home is...Ch. 16 - In a certain experiment, cylindrical samples of...Ch. 16 - One way of measuring the thermal conductivity of a...Ch. 16 - A concrete wall with a surface area of 20 m2 and a...Ch. 16 - A hollow spherical iron container with outer...Ch. 16 - The inner and outer glasses of a 4-ft × 4-ft...Ch. 16 - An engineer who is working on the heat transfer...Ch. 16 - Air at 20°C with a convection heat transfer...Ch. 16 - Four power transistors, each dissipating 12 W, are...Ch. 16 - In a power plant, pipes transporting superheated...Ch. 16 - An electric current of 5 A passing through a...Ch. 16 - Hot air at 80°C is blown over a 2-m × 4-m flat...Ch. 16 - A 5-cm-external-diameter, 10-m-long hot-water pipe...Ch. 16 - A transistor with a height of 0.4 cm and a...Ch. 16 - A 300-ft-long section of a steam pipe whose outer...Ch. 16 - The boiling temperature of nitrogen at atmospheric...Ch. 16 - Repeat Prob. 16–43 for liquid oxygen, which has a...Ch. 16 - A series of experiments were conducted by passing...Ch. 16 - A 2.1-m-long, 0.2-cm-diameter electrical wire...Ch. 16 - Using the conversion factors between W and Btu/h,...Ch. 16 - The outer surface of a spacecraft in space has an...Ch. 16 - Consider a person whose exposed surface area is...Ch. 16 - Consider a sealed 20-cm-high electronic box whose...Ch. 16 - Two surfaces, one highly polished and the other...Ch. 16 - A spherical interplanetary probe, with a diameter...Ch. 16 - An electronic package in the shape of a sphere...Ch. 16 - Can all three modes of heat transfer occur...Ch. 16 - Can a medium involve (a) conduction and...Ch. 16 - The deep human body temperature of a healthy...Ch. 16 - We often turn the fan on in summer to help us...Ch. 16 - Consider a 20 cm thick granite wall with a thermal...Ch. 16 - A solid plate, with a thickness of 15 cm and a...Ch. 16 - Air at 20°C with a convection heat transfer...Ch. 16 - An electronic package with a surface area of 1 m2...Ch. 16 - Consider steady heat transfer between two large...Ch. 16 - Consider a person standing in a room at 18°C....Ch. 16 - The inner and outer surfaces of a 25-cm-thick wall...Ch. 16 - A 2-in-diameter spherical ball whose surface is...Ch. 16 - An 800-W iron is left on the iron board with its...Ch. 16 - A 3-m-internal-diameter spherical tank made of...Ch. 16 - Solar radiation is incident on a 5 m2 solar...Ch. 16 - A flat-plate solar collector is used to heat water...Ch. 16 - The roof of a house consists of a 22-cm-thick...Ch. 16 - Consider a flat-plate solar collector placed...Ch. 16 - An AISI 304 stainless steel sheet is going through...Ch. 16 - Engine valves (cp = 440 J/kg·K and = 7840 kg/m3)...Ch. 16 - A cylindrical resistor element on a circuit board...Ch. 16 - The heat generated in the circuitry on the surface...Ch. 16 - A 0.3-cm-thick, 12-cm-high, and 18-cm-long circuit...Ch. 16 - A 40-cm-long, 800-W electric resistance heating...Ch. 16 - It is well known that wind makes the cold air feel...Ch. 16 - An engine block with a surface area measured to be...Ch. 16 - Consider an electrical wire submerged in liquid...Ch. 16 - A cylindrical fuel rod of 2 cm in diameter is...Ch. 16 - Consider a person standing in a room maintained at...Ch. 16 - Consider a 3-m × 3-m × 3-m cubical furnace whose...Ch. 16 - A soldering iron has a cylindrical tip of 2.5 mm...Ch. 16 - A thin metal plate is insulated on the back and...Ch. 16 - Consider a flat-plate solar collector placed on...Ch. 16 - An electric heater with the total surface area of...
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