Relative Density - Examples

Examples

Substances with a specific gravity of 1 are neutrally buoyant, those with SG greater than one are denser than water, and so (ignoring surface tension effects) will sink in it, and those with an SG of less than one are less dense than water, and so will float.

Example:

RD_{H_2O} = \frac{\rho_\mathrm{Material}}{\rho_\mathrm{H_2O}}\ = SG,
Material Specific Gravity
Balsa wood 0.2
Ethanol 0.78
Aluminum 2.7
Lead 11.35
Mercury 13.56
Gold 19.3

(Samples may vary, and these figures are approximate.)

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