Initial ice layer on a pond is 10 mm. What time will it take to form an addition of 5 mm on it? Given K of ice`=1.6Wm^(-1)K^(-1)`, temperature=`-10^(@)C` and density of water `=10^3kgm^(-3)`

A copper block of mass 2.5 kg is heated in a furance to 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 =380Jkg^(-1)K^(-1) , latetn heat of fusion of ice =3.36xx10^(5)Jkg^(-1) ).

A copper block of mass 2.5 kg ts 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 = 0.39 J g^(-1) K^(-1), " heat of fusion of water " = 335 J g^(-1)) .

The lower end of a capillary tube of diameter 2.00mm is dipped 8.00cm below the surface of water in a beaker. What is the pressure required in the tube in order to blow a hemispherical bubble at its end in water? The surface tension of water at temperature of the experiments is 7.30 times 10^2 Nm^-1 .1 atmospheric pressure =1.01 times 10^5 Pa density of water =1000 kg//m^3,g=9.80 ms^-2 . Also calculate the excess pressure.

At what rate a layer of ice will be formed if the surrounding temperature is at -10^(@)C ? Thermal conductivity of ice =1.6Wm^(-1)K^(-1) . Initial thickness of ice is 1mm

Find the amount of heat required to convert 10 kg ice at -10^(@)C to water at 50^(@)C . Given specific heat of ice 2100Jkg^(-1)K^(-1) , specific heat of water 4200Jkg^(-1)K^(-1) and latent heat of ice 3.36xx10^5Jkg^(-1)

A cubical ice box of thermocol has each side 30 cm and thickness 5 cm , 4 kg of ice is put in the box , if outside temperature is 45^(@)C and coefficient of thermal conductivity is 0.01 J s^(-1) m^(-1) K^(-1) . Calculate the mass of ice left after 6 hrs . Take latent heat of fusion of ice as 335 xx 10^(3) JK^(-1)

100 mg mass of nichrome metal is drawn into a wire of area of cross-section 0.05 mm. Calculate the resistance of this wire. Given density of nichrome 8.4 xx 10^3 "kgm"^(-3) and resistivity of the material as 1.2 xx 10^(-6) Omega m.

The terminal velocity of a copper ball of radius 2.0 mm falling through a tank of oil at 20^@C is 6.5 cm s^-1 . Compute the viscosity of the oil at 20^@C . Density of oil is 1.5 times 10^3kg m^-3 .density of copper is 8.9 times 10^3 kg m^-3 .

Steam at 373 K is passed through a tube of radius 10 cm and length 2 m. The thickness of the tube is 5 mm and thermal conductivity of the material is 390 W m^(-1) K^(-1). The outside temperature is 0C. The heat lost per second in J is