Define coefficient of thermal conductivity of a material. A cubical thermocole box of side 20 cm
and wall thickness 4 cm is full of ice. If outside temperature is 40 °C, estimate the amount of
ice melted in five hours (K for thermocol is 0.01 J s–1 °C–1 and latent heat of fusion of ice is 335 J
g–1)
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