1.

Complete the following tables.Mass (kg) Volume (m³) Density (kg/m³)350 175 -- 190 4Density of Metal (kg/m³) Density of water (kg/m³) Relative Density- 103 58.5 x 103 103 -Weight (N) Area(m²) Pressure (Nm⁻²)- 0.04 20,0001500 500 -

Answer»

DENSITY of iron (DR) = 7.8×10³ kg/m³

volume of iron piece(V) = 100cm³ = 10^(-4) m³

density of WATER (Dw) = 10³ kg/m³


(a) weight in air = Dr×V×g = 7.8×10³ × 10^(-4) ×10 = 7.8 N


(b) upthrust is the buoyant FORCE exerted by water

   upthrust = Dw×V×g = 10³ × 10^(-4) ×10 = 1N


(c) APPARENT weight in water = weight in air - upthrust

                                        = 7.8N - 1N = 6.8N


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