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Answer :
Final answer:
The volume of the cavity in the gold piece is 2.0 cm³, as this is the volume of water that the gold displaces due to the difference in weight when submerged in water compared to in air. b) 2.0 cm³
Explanation:
To calculate the volume of the cavity inside a piece of gold, we will use the principle of buoyancy that is provided by Archimedes' principle. This principle states that the buoyant force on a submerged object is equal to the weight of the fluid that the object displaces. The weight loss of the gold piece in water (38.2 g in air - 36.2 g in water) equals the weight of the water displaced by the submerged piece of gold. Since the density of water is 1 g/cm³, the weight loss of 2.0 g in water corresponds to a volume displacement of 2.0 cm³.
Therefore, the volume of the cavity in the gold piece is equal to the volume of water displaced. Since the weight loss in water is 2.0 g and this is the weight of the water that has been displaced, the volume of the cavity is 2.0 cm³.
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