Posted by completely lost! on Thursday, November 27, 2008 at 6:20pm.
The specific gravity must be between 1.00 and 0.79 if it sinks in water but not in alcohol.
The apparent mass in alcohol is
V*(wood density) - V*(alcohol density) = 0.040 kg ..after subtracting the bouyant force.
Wood density = alcohol density + 0.040 kg/V = 790 kg/m^3 + 0.040 kg/V
Wood density = 0.52 kg/V
0.48 kg/V = 790 kg/m^3
V = .000608 m^3 = .608 liters
S.G = 0.52 kg/.608 l = 0.855
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