写出解题过程---Question 1: A solid stone block weighs 10N in air and weighs 6N when submerged in water. Find: (1) The mass of the stone block. (2) The buoyant force on the stone block. (3) The volume of the stone block. (4) The density of the stone block. ($g = 10N/kg$, $\rho_{\text{水}} = 1.0 \times 10^3kg/m^3$)

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