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I have a doubt regarding mass to energy conversion. Suppose I consume m1 kg of food at beginning of a day. Will it be equal to the mass of solid and liquid wastes out of my body on that day (say m2) and increase in mass of my body (say m3) and added to energy gained by me from that food (Eg) according to famous relation [itex] E=mc^{2}[/itex] (Let us assume initial conditions of my body to be zero). That is

[tex] m1=m2+m3 + \frac{Eg}{c^2} [/tex].

Since a small difference in mass (Mdiff=m1-(m2+m3)) is equivalent to enormous amount of energy, and by my common sense (which may be wrong) I feel Mdiff will be significant leading to energy gained Eg to be very high, I doubt the mass-energy equation.

[tex] m1=m2+m3 + \frac{Eg}{c^2} [/tex].

Since a small difference in mass (Mdiff=m1-(m2+m3)) is equivalent to enormous amount of energy, and by my common sense (which may be wrong) I feel Mdiff will be significant leading to energy gained Eg to be very high, I doubt the mass-energy equation.

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