A block of wood floats on water. A layer of oil is now poured on top of the water to a dep...

A block of wood floats on water. A layer of oil is now poured on top of the water to a depth that more than covers the block, as shown in Figure 15-31. (a) Is the volume of wood sub merged in water greater than, less than, or the same as before? (b) If 90% of the wood is submerged in water before the oil is added, find the fraction submerged when oil with a density of 875 kg/ m3covers the block.