Paper 2 · Density definition and displacement-can measurement of an irregular stone and cork
A stone of mass 20 g is lowered into a measuring cylinder containing 20 cm³ of water; the water level rises to 35 cm³. Calculate the density of the stone.
A1.3 g/cm³
B0.57 g/cm³
C0.75 g/cm³
D2.33 g/cm³
Explanation: Volume of stone = 35 - 20 = 15 cm³; density = 20/15 = 1.33 g/cm³, which rounds to 1.3 g/cm³. (0.57 wrongly uses 35 cm³ as the volume; 0.75 inverts the formula; 2.33 divides the final reading by the volume instead of the mass.)
Derived from ZIMSEC Physics 4023/2 Paper 2 Theory, November 2018, Q1
