Equal volumes of metal, water and air are heated from 20 °C to 80°C. [Figure 3.1 is a diagram of the metal at 20°C. It shows a large square sheet with a square hole at its centre.]

1. (a)State whether the metal, the water or the air expands the most.[1]
2. (b)Fig. 3.1 is a diagram of the metal at 20°C. The metal is a large, square sheet with a square hole at its centre. The sheet lies flat on a table. On Fig. 3.1, draw the outline of the sheet and of the hole after the metal is heated. Make sure that the expansion is noticeable.[2]
3. (c)(i)The metal has a mass of 5.0kg and a density of 7.5 × 10³kg/m³. Define density.[1]
4. (c)(ii)Calculate the volume of the metal. Give your answer to a suitable number of significant figures. volume = .....................................................[2][2]

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