Sort each object into Floats in water or Sinks in water (density of water $= 1000$ kg/m $^{3}$ ).

Groups: Floats · Sinks

Aluminium ( $\rho$ $\approx 2700$ $kg/m^{3}$ )
Balsa wood ( $\rho$ $\approx 120$ $kg/m^{3}$ )
Oak wood ( $\rho$ $\approx 700$ $kg/m^{3}$ )
Granite ( $\rho$ $\approx 2700$ $kg/m^{3}$ )
Lead ( $\rho$ $\approx 11 340$ $kg/m^{3}$ )
Ice ( $\rho$ $\approx 917$ $kg/m^{3}$ )

Hints

Show the answer

Floats: Oak wood ( $\rho$ $\approx 700$ $kg/m^{3}$ ), Ice ( $\rho$ $\approx 917$ $kg/m^{3}$ ), Balsa wood ( $\rho$ $\approx 120$ $kg/m^{3}$ )

Sinks: Aluminium ( $\rho$ $\approx 2700$ $kg/m^{3}$ ), Lead ( $\rho$ $\approx 11 340$ $kg/m^{3}$ ), Granite ( $\rho$ $\approx 2700$ $kg/m^{3}$ )

Why

Objects with density less than 1000 $kg/m^{3}$ float; those with greater density sink.

Practise Fluid Statics: Pressure and Buoyancy

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