Answer:
The buoyant force experienced by an immersed object is equal to the weight of the fluid it displaces. The volume of the metal cube is 10 cm * 10 cm * 10 cm = 1000 cm^3. The weight of the fluid it displaces is equal to the volume of the fluid multiplied by its density and the acceleration due to gravity, so it can be calculated as:
Buoyant force = fluid density * volume * acceleration due to gravity
= 0.8 * 1000 * 10
= 8000 N
The upward force (upthrust) experienced by the metal cube is equal to the buoyant force, so it is 8000 N.
Step-by-step explanation: