A brass boiler has a base area of `0.15m^2` and thickness 1.0 cm it boils water at the rate of `6.0 kg//min`, When placed on a gas. Estimate the temperature of the part of the flame in contact with the boiler. Thermal conductivity of brass`=109 J//s-.^@C` ) and heat of vapourization of water `=2256 J//g`.

A brass boiler has a base area of 0.15 m^2 and thickness 1.0 cm it bolis water at the rate of 6.0 kg/min, when placed on a gas stove. Estimate the temperature of the part of the flame in contact with the bolier. Thermal conductivity of brass =609 J s^(-1) .^@C^(-1). Heat of vaporisation of water =2256 xx 10^3 J g^(-1)

A cylinderical brass boiler of radius 15 cm and thickness 1.0 cm is filled with water and placed on an elerctric heater. If the If the water boils at the rate of 200 g//s , estimate the temperature of the heater filament. Thermal conductivity of brass=109 J//s//m^@C and heat of vapourization of water =2.256xx10^3 J//g .

A brass boiler of base area 0.10 m^2 and thickness 1.0 boils water at the rate of 5.0 kg "min"^(-1) when placed on a stove. The thermal conductivity of brass is 109 J s^(-1) m^(-1) ""^@C^(-1) and heat of vaporisation of water is 2256 Jg^(-1) . If the temperature of the part of the flame in contact with the boiler is T = (3^p 2^q 5^r 11^s)/(109) , then find the value of p+q+r+s.

An iron boiler with walls 1.25 cm thick contains water at atmospheric pressure. The heated surface is 2.5 m^(2) in area and the temperature of the underside is 120^(@)C. Thermal conductivity of iron is 20 cal s^(-1) m^(-1) K^(-1) and the latent heat of evaporation of water 536 xx10^(3) cal kg^(-1) . Find the mass of water evaporated per hour.

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)