Question Detail
Question
An object weighs 36g in air and has a volume of 8.0 cm³. What will be the apparent weight when immersed in water?
Correct Answer
Option D is the correct answer.
Detailed Explanation
When an object is immersed in water, it experiences an upward buoyant force equal to the weight of water displaced. The volume of water displaced = volume of object = 8.0 cm³. Mass of water displaced = density of water × volume = 1 g/cm³ × 8 cm³ = 8g. So the buoyant force = 8g (in gram-weight units). Apparent weight = actual weight - buoyant force = 36g - 8g = 28g.
Hint
Apparent weight = actual weight - buoyant force. Buoyant force equals weight of fluid displaced (Archimedes' principle).