In Joule's experiment, a mass of 0.8 kg was allowed to fal through a height of 75 cm. The process was repeated 150 times and rise of temperature of `2.1^(@)C` was observed. If the water equivalent of the calorimeter and its contents is 100g, find the value of J.

In a Joule's experiment, two weights of 5 kg each fall through a height of 3m and rotate a paddle wheel which stirs 0.1 kg water. What is the change in the temperature of the water ?

In the determination of J buy Joule's experiment, the weights of mass 1kg each were allowed to fall through 1m . When the fell 80 times the temperature of the water in the calorimeter increased by 3^(@)C . Calculate J if the time taken for each fall was 1 second and the water equivalent of the calorimeter and its contents 100xx10^(-3) kg. Sp. heat capacity of water =1000 cal kg^(-1)K^(-1) .

When 0.400 kg of water at 30^(@)C is mixed with 0.150 kg of water at 25^(@)C contained in a calorimeter, the final temperature is found to be 27^(@)C , find the water equivalent of the calorimeter.

A thin metallic wire of resistance 100 Omega is immersed in a calorimeter containing 250 g of water at 10^@C and a current of 0.5 ampere is passed through it for half an hour. If the water equivalent of the calorimeter is 10 kg, find the final temperature of water.

A calorimeter takes 400 cal of heat to rise its temperature through 10C .Its water equivalent in gm is N times10 then the value of N is

An experiment is performed to measure the molar heat capacity of a gas at constant pressure using Regnault's method. The gas is initially contained in a cubical reservoir of size 40 cm xx 40 cm xx 40 cm xx at 600 kPa at 27^0C . A part of the gas is brought out, heated to 100^0C and is passed through a calorimeter at constant pressure. The water equivalent of the calorimeter and its contents increases from 20^0C to 30^0C during the experiment and the pressure in the reservoir decresases to 525 kPa . Specific heat capacity of water = 4200 J kg^(-1) K^(1). Calculate the molar heat capacity Cp from these data.

A copper calorimeter of mass 100 gm contains 200 gm of a mixture of ice and water. Steam at 100°C under normal pressure is passed into the calorimeter and the temperature of the mixture is allowed to rise to 50°C. If the mass of the calorimeter and its contents is now 330 gm, what was the ratio of ice and water in beginning? Neglect heat losses. Given : Specific heat capacity of copper =0.42xx10^3 J kg^(-1) K^(-1) . Specific heat capacity of water =4.2 xx10^3 J kg^(-1) K^(-1) Specific heat of fusion of ice =3.36xx10^5 J kg^(-1) Latent heat of condensation of steam =22.5 xx 10^5 J kg^(-1)