A geyser heats water flowing at the rate of `3.0` litres per minute from `27°C` to `77°C`. If the geyser operates on a gas burner, what is the rate of consumption of the fuel it its heat of combustion is `4.0*10^4Jg^-1`

Determine the heat energy required to melt 5 kg of ice completely at 0°C.Latent heat of fusion of water is 3336×10^3JKg^-1

At room temperature (27.0 ^@C) the resistance of a heating element is 100 Omega . What is the temperature of the element if the resistance is found to be 117 Omega , given that the temperature coefficient of the material of the resistor is 1.70 xx 10^-4 ^@C^-1

A brass boiler has a base area of 0.15m^2 and thickness 1.0cm .It boils water at the rate of 6.0kg/min when placed on a gas stove.Estimate the temperature of the part of the flame in contact with the boiler.Thermal conductivity of brass = 109Js^(-1) m^(-1)K^(-1) ,Heat of vaporisation of water= 2256xx10^3J kg^(-1) .

A copper block of mass 2.5kg is heated in a furnace to a temperature of 500°C and then placed on a large ice block. What is the maximum amount of ice that can melt?(Specific heat of copper = 0.39Jg^-1 K^-1 , latent heat of fusion of water = 335Jg^-1) .

An ice box made of Styrofoam (Thermal conductivity = 0.01 J m ^(-1) s ^(-1) K ^(-1)) is used to keep liquids cool. It has a total wall area including lid of 0.8 m^(2) and wall thickness of 2.0 cm. A bottle of water is placed in the box and filled with ice. If the outside temperature is 30°C the rate of flow of heat into the box is : (in J-s ^(-1) ):