Question

A half kg sheet of tin sinks in water but floats when converted into a box .
(a) Does the mass of the sheet change ?
(b) Which physical quantity changes when sheet is converted into box ?
(c) Write the SI unit of the changed physical quantity.

Answer 1

(a) No, the mass of sheet does not changes. Only its shape changes.
(b) Volume. When the sheet is converted into a box, the volume is increased.
(c) S.I. unit of volume is meter cube(m^3).