Q: The density of liquid water can be correlated as ρ(T
The density of liquid water can be correlated as ρ(T) = 1000 − 0.0736T − 0.00355T2 where ρ and T are in kg/m3 and °C, respectively. Determine the volume expansion coefficient at 70°C. Compare the resu...
See AnswerQ: The surface in Prob. 21–109 receives solar radiation at
The surface in Prob. 21–109 receives solar radiation at a rate of 470 W/m2. Determine the solar absorptivity of the surface and the rate of absorption of solar radiation.
See AnswerQ: Exhaust gases from a manufacturing plant are being discharged through a 10
Exhaust gases from a manufacturing plant are being discharged through a 10-m-tall exhaust stack with outer diameter of 1 m. The exhaust gases are discharged at a rate of 0.125 kg/s, while temperature...
See AnswerQ: Solar radiation is incident on the front surface of a thin plate
Solar radiation is incident on the front surface of a thin plate with direct and diffuse components of 300 and 250 W/m2, respectively. The direct radiation makes a 30° angle with the normal...
See AnswerQ: A 40-cm-diameter, 110-cm-high
A 40-cm-diameter, 110-cm-high cylindrical hot-water tank is located in the bathroom of a house maintained at 20°C. The surface temperature of the tank is measured to be 44°C and its emissivity is 0.4...
See AnswerQ: A horizontal opaque flat plate is well insulated on the edges and
A horizontal opaque flat plate is well insulated on the edges and the lower surface. The top surface has an area of 5 m2, and it experiences uniform irradiation at a rate of 5000 W. The plate absorbs...
See AnswerQ: A 12-cm-diameter and 15-m-long
A 12-cm-diameter and 15-m-long cylinder with a surface temperature of 10°C is placed horizontally in air at 40°C. Calculate the steady rate of heat transfer for the cases of (a) free-stream air veloci...
See AnswerQ: Reconsider Prob. 4–108. Using appropriate software, investigate
Reconsider Prob. 4–108. Using appropriate software, investigate the effect of the initial pressure of refrigerant-134a on the volume of the tank. Let the initial pressure vary from 0...
See AnswerQ: Consider an enclosure consisting of eight surfaces. How many view factors
Consider an enclosure consisting of eight surfaces. How many view factors does this geometry involve? How many of these view factors can be determined by the application of the reciprocity and the sum...
See AnswerQ: Hot water is flowing at an average velocity of 4 ft/
Hot water is flowing at an average velocity of 4 ft/s through a cast iron pipe (k = 30 Btu/h⋅ft⋅°F) whose inner and outer diameters are 1.0 in and 1.2 in, respectively. The pipe passes through a 50 ft...
See Answer
