DENSITY AND PRESSURE
3 marks · NormalA glass block has a mass of 1.2 kg and a volume of 0.00048 m³. Calculate the density of the glass. Give your answer to two significant figures and include the correct unit.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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2.5 × 10³ kg/m³ (±50)
Also accept: 2500 kg/m³; 2.5 × 10^3 kg/m³
Common mistakes: Dividing mass by incorrect volume; Giving answer to wrong significant figures
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Marking points
M1 · 1 mark · Writes out the density formula or attempts to substitute values
A1 · 1 mark · Completes the correct calculation
A2 · 1 mark · States the answer to 2 significant figures with correct unit
Worked solution
Substitute: m = 1.2 kg, V = 0.00048 m³
The density is 2.5 × 10³ kg/m³ (to 2 significant figures).