A technician measures the density of an irregular glass fragment. The fragment is fully submerged in water in a measuring cylinder, with no water spilled and no air bubbles trapped. The fragment's mass is measured correctly. The water level rises from 30 cm3 to 42 cm3, but the technician uses 42 cm3 as the fragment's volume.
What is the correct volume of the fragment, and what happens to the calculated density when this volume is used instead?
12 cm312\ \text{cm}^312 cm3; the calculated density becomes larger.
72 cm372\ \text{cm}^372 cm3; the calculated density becomes smaller.
12 cm312\ \text{cm}^312 cm3; the calculated density becomes smaller.
30 cm330\ \text{cm}^330 cm3; the calculated density becomes larger.
87 exam-style questions on Edexcel GCSE Physics 14.1 Density and states of matter, covering 14.1.1 Kinetic theory and states of matter, 14.1.2 Density, and 14.1.3 Density and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.