archimedes was giving the task of determining whether a crown commis king was ma
ID: 985383 • Letter: A
Question
archimedes was giving the task of determining whether a crown commis king was made of pure gold or a mixture of silver and gold. What volume of water is displaced by 1 kg of zinc? What volume of water is displaced by 1 kg of aluminum? The density of gold is 19.3 g/cm^3 A crown displaces 23 ml nd weighs 347.5 g. Is it made of pure gold? Why/Why not? Get the barge under the bridge arge is carrying a load of gravel along a river. it approache tain realizes that the top of the pile of grave is not goving Is captain orders the crew to quickly shovel gravel from the od decision? Why / Why not?Explanation / Answer
11)
density of Zinc = 7.14 g/cm^3
mass of zinc = 1 kg = 1000 g
volume of zinc = 1000 / 7.14 = 140 cm^3 = 140 mL
volume of water displaced = 140 mL
12)
density of aluminium = 2.7 g/cm^3
mass of aluminium = 1 kg = 1000 g
volume of aluminium = 1000 / 2.7 = 370 cm^3 = 370 mL
volume of water displaced = 370 mL
13)
density of gold = 19.3 g/cm^3
volume displaced = 23 mL
mass of crown = 347.5 g
density = mass/volume
= 347.5 /23
= 15.1 g/ cm3
it is lesser density than gold . so it is not pure
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