A 15 cm3 block of gold weighs 2.8 N. It is carefully submerged in a tank of mercury. One cm3 of mercury weighs 0.13 N. a. Will the mercury be displaced by the gold? b. Will the gold sink or float in the mercury?

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The density of gold is  2.8 N / 15 = 0.18 units The density of mercury is 0.13/1 = 0.13 units Since the density of gold is more than density of mercury, it will sink. Since the gold will sink, it will displace mercury, but less than its own volume

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