A 1 cm^3 block with a density of 0.92 g/cm^3 is floating in a container of water (d = 1g / cm^3). You may ignore any air pressure throughout this problem. What buoyant force is necessary to keep the block from sinking?

980 dyne

Explanation:

Volume = 1 cm^3, d = 0.92 g / cm^3, D = 1 g/cm^3

In the equilibrium condition, the buoyant force is equal to the weight of the block.

Buoyant force = Volume of block x density of water x g

Buoyant force = 1 x 1 x 980 = 980 dyne