When you do exercise, your body converts stored chemical energy (that you obtain

Question

When you do exercise, your body converts stored chemical energy (that you obtain by eating) into mechanical energy. When you are swimming, the efficiency of that process is about 2% i.e. only 2% of the chemical energy becomes mechanical energy of you, the swimmer. Energy is conserved, so what do you think happens to the other 98% of the chemical energy?
a) It becomes internal energy of the water
b) It becomes internal energy of the swimmer
c) It becomes internal energy of the swimmer and the water (but we can't tell how much in each without more information).
d) It becomes internal energy of the swimmer and mechanical and internal energy of the water (but we can't tell how much of each without more information).

Explanation / Answer

when we exercise the stored chenical energy converts in to mechanical energy, the same in swimming also

given that 2% of chemical energy converts in to mechanical energy , the remaining 98% of energy becomes the internal energy of the water and swimmer because

when the swimmer is at certain temperature above the temperature of the water then the heat transformation takes place so that the change in temperature takes place resulting the equilibrium temperature attains till that there is change in both the internal energies of swimmer and water

so the answer is option C

It becomes internal energy of the swimmer and the water (but we can't tell how much in each without more information).

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