A layer of ice 2 cm thick is formed on a pond. The temperature of air is `-20^(@)C`. Calculate how long it will take for the thickness of ice to increase by 1mm. Density of ice `= 1g cm^(-3)`. Latent heat of ice `= 80 cal g^(-1)`. Conductivity of ice `= 0.008 cal s^(-1) cm^(-1) .^(@)C^(-1)`.

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)

An ice layer of thickness 3 cm is formed on a lake. How much time will it take to increase the thickness of ice by 2 mm if temperature of air is -30^@C ? Take, Density of ice = 1 g cm^(-3) , Latent heat of ice = 80 cal g^(-1) , Conductivity of ice = 0.008 cal s^(-1) cm^(-1) ""^@C^(-1)

A layer of ice 29 cm thick has formed on a pond. The temperature of air is -10^(@)C . Find how long will it take for another 0.1 cm layer of water to freeze? Conductivity of ice = 2.1 J s^(-1)m^(-1)K^(-1) . Latent heat capacity of ice =3.36 xx 10^(5) J kg^(-1) and density of ice = 1000 kg m^(-3) .

The entropy change in melting 1g of ice at 0^@C . (Latent heat of ice is 80 cal g^(-1) )

A layer of ice 0.15 m thick has formed on the surface of a deep pond. If the temperature of upper surface of ice is constant and equql to that of air which is -12^(@)C , determine the time it will take to increase of ice layer by 0.2 mm. take latent heat of ice =80 cal g^(-1) , density of ice =0.91 g cm^(-3) and thermal conductivity of ice =0.5 cal s^(-1)m^(-1)K^(-1) .

On a winter day when the atmospheric temperature drops to -10^(@)C , ice forms on the surface of a lajke. (a) Calculate the rate of increases of thickness of the ice when 10cm of ice is already formed. (b) Calculate the total time taken in forming 10cm of ice. Assume that the temperature of the entire water reaches 0^(@)C before the ice starts forming. Density of water =1000kgm^(-3) , latent heat of fusion of ice =3.36xx10^(5)Jkg^(-1) and thermal conductivity of ice =1.7Wm^(-1) ^(@)C^(-1) . Neglect the expension of water on freezing.

If a ball of 80 kg mass hits an ice cube and temperature of ball is 100 .^(@)C , then how much ice converted into water ? (Specific heat of ball is 0.2 cal g^(-1) , Latent heat of ice = 80 cal g^(-1) )

A hollow sphere of glas whose external and internal radii are 11 cm and 9 cm respectively is completely filled with ice at 0^@C and placed in a bath of boiling water. How long will it take for the ice to melt completely? Given that density of ice = 0.9 g//cm^3 , latent heat of fusion of ice = 80 cal//g and thermal conductivity of glass =0.002 cal//cm-s^@C .

A hollow sphere of glass whose external and internal radii are 11cm and 9cm respec-tively is completely filled with ice at 0^(@)C and placed in a both of boiling water How long will it take for the ice to melt completely ? Givne that density of ice =0.9g//cm^(3) latent heat of fusion of ice =80 cal//g and thermal conductivity of glass =0.002 cal//cm-s^(@)C .

The thickness of ice in a lake is 5cm and the atmospheric temperature is 10^(@)C Calculate the time rquired for the thickness of ice to grow to 7cm Therml conductivity for ice =4 xx 10^(-3) cal cm^(-1) s^(-1) c^(-10 density of ice =0.92 g //cm^(3) and latent heat of fusion of ice =80 cal//g .