a) $7860~ kg/m³ = 7,86×10⁻³ ~kg/cm³ = 7,86 ~g/cm³$;
b) $1~ g/cm³ = 0.001~ kg/cm³ = 1000~ kg/m³$;
c) $2,7~kg/dm³ = 2,7×10⁻³~ kg/cm³ = 2,7~ g/cm³$;
d) $1000~ kg/m³ = 1~ g/cm³ = 1~ g/ml = 1 ~kg/l$ .
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