Question

a block of Wood can float on water while a similar sized block of concrete can be used as an anchor.why?

Answer 1

This is because the wooden block is light weighed whereas on the other hand similar sized block of concrete is heavy and it is therefore used as and anchor.

Answer 2

The block of the wood can be float on the water and it can be similar in size block of the concrete and it can be used as the anchor.

Because the block can be light weighted on the other hand and it can be sized in similar so the concrete is heavy this is the reason for using the anchor.