Virtual Labs

The rate of heat transfer through a long fin is influenced by its:

a: Length and thickness Explanation

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b: Material Composition Explanation

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c: Temperature Difference Explanation

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d: All the above Explanation

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The temperature distribution along a long fin is given by the equation T = (T₀ - T_∞)*e^(-mx), where T₀ is the base temperature, T_∞ is the surrounding temperature, m is a constant, and x is the distance from the base of the fin. If m increases, what happens to the temperature drop along the length of the fin?

a: The temperature drop increases. Explanation

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b: The temperature drop decreases. Explanation

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c: The temperature drop remains the same. Explanation

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d: It cannot be determined from the information given. Explanation

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A long fin is made of two materials, with different thermal conductivities. The heat transfer coefficient on the fin surface is the same for both materials. If the length of the fin is the same for both materials, which material will have the higher heat transfer rate?

a: The material with the higher thermal conductivity. Explanation

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b: The material with the lower thermal conductivity. Explanation

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c: It cannot be determined from the information given. Explanation

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d: All of the above Explanation

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What is the main purpose of fins in heat transfer?

a: To decrease the thermal conductivity of the material Explanation

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b: To prevent heat loss Explanation

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c: To increase the surface area for convection Explanation

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d: None of the above Explanation

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Why is it important to consider the variation of the convection heat transfer coefficient along the fin in the analysis of fins?

a: Because the convection heat transfer coefficient is a strong function of the fluid motion at that point Explanation

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b: Because the value of h is usually much lower at the fin base than it is at the fin tip Explanation

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c: All the above Explanation

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d: None of the above Explanation

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Heat Transfer through a Long Fin