CBSE Class 7 Answered
Give reason for 'A brass tumbler feel much cooler then a wooden tray on a chilly day.
Asked by rishusingh9872 | 28 Dec, 2018, 06:39: AM
Expert Answer
Thermal conductivity of brass = 109 W/mK
Thermal conductivity of wood ≈ 0.1 W/mK
Thermal conductivity of brass is 1000 times than that of wood.
Hence Heat loss due to coduction from brass tumbler to surroundings is 1000 times in comparision to wood tray.
Hence brass tumbler is felt much cooler than wooden tray on a chilly day
Answered by Thiyagarajan K | 28 Dec, 2018, 09:12: AM
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