A student wishes to find the volume of a piece of wood of irregular shape. Her experiment requires
the use of a small brass object of mass 200 g.
(a) Calculate the volume of the brass object. The density of brass is 8.4 g/cm3
(b) To find the volume of the piece of wood, the student has a measuring cylinder, a supply of
water and the brass object in (a). The piece of wood and the brass object are small enough
to be placed in the measuring cylinder.
(i) The piece of wood does not sink in water. Suggest why.
(ii) Describe what the student does to find the volume of the piece of wood, stating the
measurements that she makes and any calculations required.