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# Is the total differential of delta m= K/C equal to (k / c^2) - (1/c) or is it (c-k) / c^2 ?

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- Ron WLv 71 decade agoFavorite Answer
If m = k/c

If k is a constant, then

Δm = (-k/c²)Δc

If k is not a constant, then

Δm = (-k/c²)Δc + (1/c)Δk

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