Answer :
Final answer:
The apparent weight of the block of steel in water can be calculated using the buoyant force concept.
Explanation:
The apparent weight of the block of steel can be calculated using the concept of buoyant force. The buoyant force is equal to the weight of the water displaced by the block. In this case, the volume of the block is 5cm x 5cm x 5cm = 125cm³.
The weight of the water displaced can be calculated using the formula weight = density x volume. Since the relative density of steel is 7, the density of the block is 7g/cm³.
Therefore, the weight of the water displaced is (7g/cm³) x (125cm³) = 875g = 8.75kg.
So, the apparent weight of the block in water is 8.75kg, which is option c. 5 x 5 x 5 x 7g.
