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 ?

Two identical masses of 5 kg each fall on a wheel from a height of 10 m . The wheel disturbs a mass of 2 kg water, the rise in temperature of water will be :-

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) .

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.

Work done by 1kg of water when it falls through the height of 100m is

In the Joule experiment, a mass of 20 kg falls through 1.5m at a constant velocity to stir the water in a calorimeter. If the calorimeter has a water equivalent of 2 g and contains 12 g of water, what is f, the mechanical equivalent of heat, for a temperature rise of 5.0^@C ?

(Take C_(w)=4180 J kg^(-1) K^(-1)) A block of weight 5kg falls from a height of 5m into a bucket containing 10L of water. If all the mechanical energy of the block is used to heat water, find the rise in temperature of water. Take g= 10ms^(-2)