The nature of surfaces affects the absorption and the reflection of radiation.  Assume that you are given wood for construction and asked to take two pieces of the wood to be placed in sunlight.  One piece is to be painted white and the other black.  Which piece will absorb more heat?   If the same two pieces at room temperature are laid on the ground in the middle of the night during the harmattan in Bolgatanga in the Upper East region, which piece will cool faster?  Give argument in support of your answer

Question

 

The nature of surfaces affects the absorption and the reflection of radiation.  Assume that you are given wood for construction and asked to take two pieces of the wood to be placed in sunlight.  One piece is to be painted white and the other black.  Which piece will absorb more heat?  

If the same two pieces at room temperature are laid on the ground in the middle of the night during the harmattan in Bolgatanga in the Upper East region, which piece will cool faster?  Give argument in support of your answer

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Mechanical Engineering

Heat Transfer

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