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A student is carrying out an experiment to determine the density of a brass bolt.

1. Volume Measurement

The student measures the volume of the bolt by displacement of water in a measuring cylinder. The results are shown in Table 1.

Table 1

Volume of water ( $cm3\text{cm}^3$ )	Volume of water and bolt ( $cm3\text{cm}^3$ )	Volume of bolt $X$ ( $cm3\text{cm}^3$ )
$24.5$	$28.3$	$X$

Calculate the volume of the bolt, $X$ , in Table 1.

[2]

2. Systematic Error

The student noticed that the digital balance had a zero error: it displayed a reading of $g0.05\text{ g}$ before any object was placed on it.

How should the student correct this error after the mass of the bolt has been measured?

Add $g0.05\text{ g}$ to the measurement
Subtract $g0.05\text{ g}$ from the measurement
Divide the measurement by $0.05$
Multiply the measurement by $0.05$

[1]

3. Mass Calculation

A different brass bolt has a volume of $cm30.60\text{ cm}^3$ . The density of this brass is $g/cm38.5\text{ g/cm}^3$ .

Calculate the mass of this different bolt in grams. State the formula you used to link density ( $ρ\rho$ ), mass ( $m$ ), and volume ( $V$ ).

[3]

Changes of state and the particle model Questions

Practise AQA GCSE Physics Changes of state and the particle model with exam-style questions for Foundation and Higher tier. 25 questions covering Density of materials and Changes of state, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.