Collins p.106 Q.1-3. (Table of densities below)
Q1.
o Wood in oil = depend on the wood
o Wood in mercury = Wood will float
o Plastic in oil = Plastic will sink
o Steel in mercury = Steel will float
o Silver in air = Air will sink
o Gold in mercury = Gold will sink
o Helium balloon in air = Air will sink
Q2.
Volume = 0.2 X 0.09 X 0.065 = 0.0017
Mass = 22.2/10 = 2.22
Density = Mass/ Volume
= 2.22/0.00117 = 1897kg/m3
Q3. 900 cm3
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