Estimate the rate at which ice would melt in a wooden box 20 mm thick and of inside measurement 200 cm x 100 cm x 100 cm assumming that external temperature is `27^(@)C` and coefficient of thermal conductivity of wood is `0.0004 cal s^(-1) cm^(-1) .^(@)C^(-1)`.

Estimate the rate at which ice would melt in a wooden box 2.5 mm thick and of inside measurement 100 cm x 60 cm x 40 cm, assumming that external temperature is 32 .^(@)C and coefficient of thermal conductivity of wood is 0.168 Wm^(-1) K^(-1) . Given L=80 cal//g .

A cubical ice box of side 50 cm has a thickness of 5.0 cm. if 5 kg of ice is put in the box, estimate the amount of ice remaining after 4 hours. The outside temperature is 40^(@)C and coefficient of thermal conductivity of the material of the box = 0.01 Js^(-1) m^(-1) .^(@)C^(-1) . Heat of fusion of ice = 335 Jg^(-1) .

Calculate the rate of loss of heat through a glass window of area 1000 cm^(2) and thickness 0.4 cm when temperature inside is 37^(@)C and outside is -5^@)C . Coefficient of thermal conductivity of glass is 2.2 xx 10^(-3) cal s^(-1) cm^(-1) K^(-1) .

A cubical thermocol ice box of side length 30cm has thichess of 5.0cm If 4.0kg of ice is put in the box estimate the amount of ice remaining after 6hr The utside temperature is 45^(@)C and co-efficinet of the thermal conductivity of the thermocol is 0.01 J s^(-1) m^(-1) K^(1) (Latent Heat of fusion of water =335 xx 10^(3) Jkg^(-1)) .

Steam at 100^(@)C is passed into a copper cylinder 10 mm thick and of 200 cm^(2) area. Water at 100^(@)C collects at the rate of 150 g min^(-1) . Find the temperature of the outer surface, if the conductivity of copper is 0.8 cal s^(-1) cm^(-1) .^(@)C^(-1) and the latent heat of steam is 540 cal g^(-1) .

For a glass window of area 1500 cm^2 and thickness 0.5 cm, determine the rate of loss of heat if the temperature inside the window is 35^@C and outside is -2^@C . Take, coefficient of thermal conductivity of glass = 2.2 xx 10^(-3) cal s^(-1) cm^(-1) K^(-1)

A thermocole cubical icebox of side 30 cm has a thickness of 5.0 cm if 4.0 kg of ice are put ini the box, estimate the amount of ice remaining after 6 h. The outside temperature is 45^@C and coefficient of thermal conductivity of thermocole =0.01 J//kg .

On the Dal lake of Kashmir, a layer of 2 cm thick ice is formed when the outside temperature is -10^@C . How much time it will take for the increase in thickness of ice by 0.5 mm? Take, Density of ice = 1 g//c^3 m Latent heat of ice = 80 cal/g Thermal conductivity of ice = 0.008 cal s^(-1) cm^(-1) ""^@C^(-1)