Find out the water equivalent, and thermal capacity of a calorimeter made of 100 g of copper [s=0.09 cal.g − 1 . ∘ C − 1).

Write the C.G.S. unit of thermal conductivity.

An alloy contains 60% copper and 40% nickel. A piece of this alloy of mass 50 g is heated to 50^(@)C and than dropped into a calorimeter of water equivalent 10 g containing 40 g of water at 20^(@)C . Calculate the final temperature of the mixture. Specific heat of copper ="0.09 cal.g"^(-1).^(@)C^(-1) , and of nickel = "0.11 cal.g"^(-1).^(@)C^(-1)

What is the thermal capacity of 40 gm of aluminium? Specific heat of aluminium is 0.2 cal g^-1^@C^-1 .

The mass of a copper steam boiler is 200 kg. It contains 100 kg of water at 25^(@)C.7xx10^(6) cal of heat is produced by burning 1 kg of coal and only 3% of it is absorbed by the boiler to heat water. How much coal is to be burnt to raise the temperature of the water in the boiler to its boiling point? Specific heat of copper ="0.09 cal.g"^(-1).^(@)C^(-1) .

Mass of a piece of cppper is 20 g. Find the rise in temperature of the piece when 100 cal of heat is supplied to it? Specific heat of copper ="0.09 cal. g"^(-1).^(@)C^(-1).

Earth gains energy from the sun at a rate of 8.4 J cdot cm^(-2) cdot "min"^(-1) . A black coloured calorimeter, having water equivalent of 15g, contains 100 g water at 25^(@)C . The calorimeter is kept at the focus of a convex lens facing the sun. If the aperture of the lens is 1000 cm^(2) , how much time will the water take to reach its boiling point?

50 g of an alloy containing 80% copper and 20% silver is heated up to t_(1)=80^(@)C and then dropped in a calorimeter of water equivalent W = 10 g containing m = 90 g of water at t_(2)=20^(@)C . What will be the final temerature of the mixture ? Specific heat capacity of copper and silver are s_(c)=0.09" cal.g"^(-1).^(@)C^(-1) and s_(s)="0.15 cal.g"^(-1).^(@)C^(-1) respectively.

A thermometer of mass 55 g and specific heat "0.2 cal.g"^(-1).^(@)C^(-1) reads 15^(@)C at the room temperature. When the thermometer, it reads 44.4^(@)C . If the water equivalent of the calorimeter is 50 g and the mass of water taken is 250 g, find the temperature of water before the immersion of the thermometer.

50 g of an alloy containing 60% copper and 40% nickel is dropped in 55 g of water at 10^(@)C , kept in a calorimeter of water equivalent 5 g. The final temperature becomes 20^(@)C . What was the initial temperature of the alloy? Specific heats of copper and nickel are "0.095 cal.g"^(-1).^(@)C^(-1) and "0.11 cal.g"^(-1).^(@)C^(-1) respectively.

A vessel made of copper weighs 1 kg and it contains 1 kg of water at 10^(@)C . How much coal will be required to raise the temperature of this water to 100^(@)C ? On burning 1 kg of coal, 10^(4) cal of heat can be produced and 40% of this heat is lost. Specific heat of copper ="0.09 cal.g"^(-1).^(@)C^(-1) .