You've experienced convection cooling if you've ever extended your hand out the window of a moving vehicle or into a flowing water stream. With the surface of your hand at a temperature of 30°C, consider the two following conditions. Condition A: a vehicle speed of 35 km/h in air at -9°C with a convection coefficient of 40 W/m².K. Condition B: a velocity of 0.2 m/s in a water stream at 10°C with a convection coefficient of 500 W/m².K. What is the convection heat flux for the following? Condition A: W/m² Condition B: awater = i i W/m²

You've experienced convection cooling if you've ever extended your hand out the window of a moving vehicle or into a flowing water stream. With the surface of your hand at a temperature of 30°C, consider the two following conditions. Condition A: a vehicle speed of 35 km/h in air at -9°C with a convection coefficient of 40 W/m².K. Condition B: a velocity of 0.2 m/s in a water stream at 10°C with a convection coefficient of 500 W/m².K. What is the convection heat flux for the following? Condition A: W/m² Condition B: awater = i i W/m²

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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An object of irregular shape has a characteristic length of L = 1 m and is maintained at a uniform surface temperature of Ts = 375 K. When placed in atmospheric air at a temperature of T = 300 K and moving with a velocity of V = 100 m/s, the average heat flux from the surface to the air is 20,000 W/m². If a second object of the same shape, but with a characteristic length of L = 5 m, is maintained at a surface temperature of Ts 375 K and is placed in atmospheric air at T = 300 K, what will the value of the average convection coefficient be if the air velocity is V = 20 m/s? = h₂ = = || i W/m².K
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