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Mechanical Properties Of Fluids

Question
CBSEENPH11019774

A metal bob and a wooden bob, both are at same temperature higher than our body temperature. If we touch both the bobs, which of the two will appear hotter? Explain your answer.

Solution
The metallic bob appears to be hotter than the wooden bob. This is because the thermal conductivity of copper is more than that of wood.
When we touch the bobs, more heat will conduct to our hand quickly from metallic bob than wooden bob which makes us to feel metallic bob hotter than wooden bob.