A steel rod of diameter 2 cm, length 10 cm, and thermal conductivity 50 W/(m K) is exposed to ambient air at 20 °C with a heat-transfer coefficient30 W(m? K). If one end is maintained at a temperature of 70 °C and the other end is assumed to be adiabatic, calculate the heat loss from the rod.O a. 8.6 WO b. 7.2 WOc 6.8WO d. 2.7 W

To find the heat loss from the rod.

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ic, calculate the heat loss from the rod.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.29P

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Concept explainers

Classification of types of corrosion

Corrosion is described as the process in which a certain element is degraded or deteriorated due to the presence of multiple chemicals in the surrounding. Generally, corrosion happens if all the subatomic particles on a metallic object are oxidized, for example, rust on iron structures. In air or water, metals lose electrons to other particles (like oxygen), leading to the formation of an oxide with the metal.

Question

A steel rod of diameter 2 cm, length 10 cm, and thermal conductivity 50 W/(m K) is exposed to ambient air at 20 °C with a heat-transfer coefficient
30 W(m? K). If one end is maintained at a temperature of 70 °C and the other end is assumed to be adiabatic, calculate the heat loss from the rod.
O a. 8.6 W
O b. 7.2 W
Oc 6.8W
O d. 2.7 W

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