If a dancer's breathing is deep and rapid after performing a folk dance,what is the intensity of his activity?
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Answer:
The mass is
Explanation:
From the question we are told that
The initial temperature is
The final temperature is
Generally the maximum heat produced by 1 Liter of natural gas is
So the amount of heat produced by 100 L is
=>
Generally given that the efficiency is
Then actual heat received by the water is
=>
=>
Converting to kcal
=>
Generally the specific heat of water is
Generally the heat received by the water is mathematically represented as
=>
=>
Since we are ignoring air resistance which is a non-conservative force, the potential energy will be completely converted into kinetic energy, resulting in a final kinetic energy of 
.