Ablock of wood is floating in water. the weight of the part of the block above water is one-third of the total weight of the block. what is the weight of the water displaced by the block of wood? explain your answer in terms of archimedes` principle

The weight of the water displaced is the same as the total weight of the wood block. The fact that 1/3 of the block is above the water level does not matter if you just weigh the total block of wood , then the weight of the total block of wood = the weight of the water displaced by the block of wood. If you want to find density of the block of wood that is a different question - then you need the volume of the block of wood and the information about one- third of the total weight . I hope this helped